Rust
From Crankshaft Coalition Wiki
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| − | + | [[Image:Rust at battery tray old versus new.JPG|thumb|300px|A rusted battery tray alongside a new one.]] | |
| − | + | ==What is rust and its causes?== | |
| − | + | Rust is a kind of corrosion/burning -- a decay or breakdown of a material in reaction to its environment. Specifically, rust is an electrochemical corrosion that occurs in the presence of iron, oxygen, and water. Oxygen and water are available in the open air, and iron is the principal ingredient in steel. | |
| − | [[Image:Rust at battery tray old versus new.JPG|thumb|300px|A rusted battery tray.]] | + | |
| − | + | ||
| − | Rust is a kind of corrosion -- a decay or breakdown of a material in reaction to its environment. Specifically, rust is an | + | |
For rust to occur it needs an anode (a piece of metal that gives up electrons), an electrolyte (a liquid that helps transport electrons), and a cathode (a piece of metal that accepts electrons). The more conductive the electrolyte, the quicker rust will occur. For this reason, humid air, salty air, or salty water will accelerate the formation of rust. | For rust to occur it needs an anode (a piece of metal that gives up electrons), an electrolyte (a liquid that helps transport electrons), and a cathode (a piece of metal that accepts electrons). The more conductive the electrolyte, the quicker rust will occur. For this reason, humid air, salty air, or salty water will accelerate the formation of rust. | ||
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Other metals besides iron oxidize, but their oxidation is not referred to as rust. For example, when aluminum oxidizes, it forms a protective, corrosion-resistant coating that is similar in appearance to un-oxidized aluminum. Zinc oxidizes similarly, which is why it is used for galvanizing. Only the oxidation of iron and steel is known as "rust". Why? Because iron oxide takes up more physical space than iron. It's bigger. So, when iron and air combine to make Fe<sub>2</sub>O<sub>3</sub>, it "puffs out", exposing even more of the original steel to the elements. | Other metals besides iron oxidize, but their oxidation is not referred to as rust. For example, when aluminum oxidizes, it forms a protective, corrosion-resistant coating that is similar in appearance to un-oxidized aluminum. Zinc oxidizes similarly, which is why it is used for galvanizing. Only the oxidation of iron and steel is known as "rust". Why? Because iron oxide takes up more physical space than iron. It's bigger. So, when iron and air combine to make Fe<sub>2</sub>O<sub>3</sub>, it "puffs out", exposing even more of the original steel to the elements. | ||
| − | There is another iron oxide also referred to as "rust". It's Fe<sub>3</sub>O<sub>4</sub>, commonly called "black oxide", or, in mineral form, magnetite. This is the stuff that's left over after using certain products to "convert" rust. Black oxide takes up the same amount of space as iron, so it doesn't bulge it out, like reddish-brown rust, Fe<sub>2</sub>O<sub>3</sub>. Since black oxide itself doesn't offer much protection against corrosion, it's typically covered up (often with [[epoxy primer]]). Black oxide is an example of a conversion coating, a metal coating where part of the surface is converted into the coating itself, by a chemical or electrochemical process. | + | There is another iron oxide also referred to as "rust". It's Fe<sub>3</sub>O<sub>4</sub>, commonly called "black oxide", or, in mineral form, magnetite. This is the stuff that's left over after using certain products to "convert" rust. Black oxide takes up the same amount of space as iron, so it doesn't bulge it out, like reddish-brown rust, Fe<sub>2</sub>O<sub>3</sub>. Since black oxide itself doesn't offer much protection against corrosion, it's typically covered up (often with [[epoxy primer]]). Black oxide is an example of a conversion coating, a metal coating where part of the surface is converted into the coating itself, by a chemical or electrochemical process. |
===Why do older cars rust more than newer cars?=== | ===Why do older cars rust more than newer cars?=== | ||
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*Steel used in cars is of a higher quality these days. | *Steel used in cars is of a higher quality these days. | ||
*More salt is used on roads these days. | *More salt is used on roads these days. | ||
| + | *Progressive evolution of engineered 'self rinsing' technology, such as strategically designed/placed drain holes to allow rain or wash water to purge body cavities of moisture absorbing rust producing sediments, moreover, robotic assembly methods to lessen the possibility of human error which may compromise the operation of such a design by 'less than precise' assembly. eg; the human worker adds an over-sized glob of body filler next to a fender well drain hole which inadvertently clogs it, causing the fender well to hold moisture laden debris instead. | ||
| + | *Electrolysis due to some older cars (British) having 'positive ground' electrical systems -where the car's electrical system is basically all 'ground wires' instead. (eg: AMC Metropolitan assembled by Austin Motor Company in Longbridge, England -neither were they dipped in a rust preventing primer bath, then they were shipped in ocean salt air to be sold in USA) | ||
=Rust assessment= | =Rust assessment= | ||
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The "best" way to handle surface rust on an entire body is to have it professionally dipped, often at a cost of over $1000. This amount of money may not be available for a specific project, or it may be impractical to invest it. | The "best" way to handle surface rust on an entire body is to have it professionally dipped, often at a cost of over $1000. This amount of money may not be available for a specific project, or it may be impractical to invest it. | ||
| − | If you take time to properly | + | If you take time to properly assess your own rust situation, you can choose a well thought-out solution that's "best" for you. |
==Areas to assess== | ==Areas to assess== | ||
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===Tools=== | ===Tools=== | ||
| − | Besides basic hand tools, do you have | + | Besides basic hand tools, do you have an air compressor? Access to a DA sander? Angle grinder with wire wheel? Media blaster? Spot blaster? Blast cabinet? Spray gun? In some cases electric powered tools can be used instead of pneumatic tools. |
===Cost=== | ===Cost=== | ||
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*[http://solutions.3m.com/wps/portal/3M/en_US/3MAutomotive/Aftermarket/Products/Product-Catalog/?PC_7_0_53BC_root=GST1T4S9TCgv&PC_7_0_53BC_output=html&PC_7_0_53BC_gvel=6DTWTJQPBBgl&PC_7_0_53BC_vroot=GSLPLPKL4Xge&PC_7_0_53BC_node=GSQJ0YVJLSbe&PC_7_0_53BC_theme=en_US_aad_portal&PC_7_0_53BC_command=CustomizePageHandler Rust Fighter] | *[http://solutions.3m.com/wps/portal/3M/en_US/3MAutomotive/Aftermarket/Products/Product-Catalog/?PC_7_0_53BC_root=GST1T4S9TCgv&PC_7_0_53BC_output=html&PC_7_0_53BC_gvel=6DTWTJQPBBgl&PC_7_0_53BC_vroot=GSLPLPKL4Xge&PC_7_0_53BC_node=GSQJ0YVJLSbe&PC_7_0_53BC_theme=en_US_aad_portal&PC_7_0_53BC_command=CustomizePageHandler Rust Fighter] | ||
*DuPont 5717S Metal Conditioner | *DuPont 5717S Metal Conditioner | ||
| − | *http://www.rustx.com/ | + | *[http://www.rustx.com/ Rust-X] |
*[http://www.jasco-help.com/products/prod_mg.htm Jasco] | *[http://www.jasco-help.com/products/prod_mg.htm Jasco] | ||
*Prep-sol | *Prep-sol | ||
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*Rust-Check | *Rust-Check | ||
*[http://www.evaporust.com/ Evapo-Rust Rust Remover] | *[http://www.evaporust.com/ Evapo-Rust Rust Remover] | ||
| + | *[http://www.safestrustremover.com/ Safest Rust Remover] | ||
*[http://www.corroless.com/ Corroless] | *[http://www.corroless.com/ Corroless] | ||
*[http://www.kleanstrip.com/special.htm Klean Strip Rust Converter] | *[http://www.kleanstrip.com/special.htm Klean Strip Rust Converter] | ||
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*DuPont Vari-Prime | *DuPont Vari-Prime | ||
*All-Metal | *All-Metal | ||
| + | *[http://tntrustremover.com/ TNT Rust Remover] | ||
===Rust removers and "converters"=== | ===Rust removers and "converters"=== | ||
| − | After using an acid to remove rust, flush the surface with water and baking soda (confirm or expand on this). | + | After using an acid to remove rust, flush the surface with water and baking soda '''(confirm or expand on this)'''. |
When converting/neutralizing rust: | When converting/neutralizing rust: | ||
| − | # Get everything off first that you can by sanding and wire brushing (wire brushing will get into the pits better) | + | # Get everything off first that you can by sanding and wire brushing (wire brushing will get into the pits better). |
| − | # A rust converter/neutralizer containing | + | # A rust converter/neutralizer containing tannic acid, phosphoric acid or another type of acid should be used |
| − | # Be careful of getting this stuff on your concrete floor as it will bubble and decompose it | + | # Be careful of getting this stuff on your concrete floor as it will bubble and decompose it. |
| − | # Follow the instructions on the bottle when you are done there should be a fine coating on the metal which will help prevent further rust from developing | + | # Follow the instructions on the bottle when you are done there should be a fine coating on the metal which will help prevent further rust from developing. |
| − | # This stuff is hard on paintbrushes (eats away the | + | # This stuff is hard on paintbrushes (eats away the bristles) and you must be very careful of your eyes. Also it will ruin paint, so, again, use caution. |
Lots of "rust neutralizers/metal etchers/floor etchers/metal conditioners" contain primarily phosphoric acid, which reacts with rust (iron oxide) to create iron phosphate, a hard black substance over which primer can be applied. | Lots of "rust neutralizers/metal etchers/floor etchers/metal conditioners" contain primarily phosphoric acid, which reacts with rust (iron oxide) to create iron phosphate, a hard black substance over which primer can be applied. | ||
| − | Don't use battery acid (sulfuric acid) for rust removal. | + | Don't use battery acid (sulfuric acid) or muriatic acid (hydrochloric acid) for rust removal. Strong acids are dangerous, and there are many more effective chemicals. |
| − | + | *[http://www.ospho.com/ Ospho] Manufacturer description: When applied to rusted surfaces, it resists/retards rust in chemical change on drying to a tough, hard surface ready for priming. | |
| − | *[http://rustbeeter.com/ Rustbeeter] Merchant description: A byproduct of the sugar refining process. Probably similar to molasses. Parts must be submerged. Parts soak in a bucket for usually under a week, but as long as several weeks. Food product. Dry powder that gets mixed with water. Non-acidic or caustic. After use, parts are cleaned with | + | *[http://rustbeeter.com/ Rustbeeter] Merchant description: A byproduct of the sugar refining process. Probably similar to molasses. Parts must be submerged. Parts soak in a bucket for usually under a week, but as long as several weeks. Food product. Dry powder that gets mixed with water. Non-acidic or caustic. After use, parts are cleaned with dish soap and water, dried, and coated. |
*[http://www.tinmantech.com/html/must_for_rust_remover_inhibi.php Must for Rust] Merchant description: removes rust and corrosion, non-caustic to skin, needs no neutralizing, primer goes right over it. $28/gallon. | *[http://www.tinmantech.com/html/must_for_rust_remover_inhibi.php Must for Rust] Merchant description: removes rust and corrosion, non-caustic to skin, needs no neutralizing, primer goes right over it. $28/gallon. | ||
| − | *[http://www.eastwoodco.com/shopping/product/detailmain.jsp?itemID=15974&itemType=PRODUCT&iMainCat=373&iSubCat=374&iProductID=15974 Eastwood Rust Converter] Merchant description: 2-part mix, adheres to bare or rusty steel, and can be | + | *[http://www.eastwoodco.com/shopping/product/detailmain.jsp?itemID=15974&itemType=PRODUCT&iMainCat=373&iSubCat=374&iProductID=15974 Eastwood Rust Converter] Merchant description: 2-part mix, adheres to bare or rusty steel, and can be top coated with most coatings. 1 gallon each of the 2-part mix is $125. |
*[http://www.rust-cure.com/ Rust Cure] Merchant description: phosphoric acid-based. leaves a thin film that bonds well with most primers and paints. for pricing, need to see this page: http://rustcure.bizland.com/xwheretobuy.html . | *[http://www.rust-cure.com/ Rust Cure] Merchant description: phosphoric acid-based. leaves a thin film that bonds well with most primers and paints. for pricing, need to see this page: http://rustcure.bizland.com/xwheretobuy.html . | ||
*[http://www.eastwoodco.com/jump.jsp?itemID=1124&itemType=PRODUCT Oxisolv Rust Remover] Merchant description: dissolves rust and leaves behind a zinc phosphate coating. Spray/brush/dip. Non-toxic, non-flammable, and re-usable. Must be cleaned off before priming. | *[http://www.eastwoodco.com/jump.jsp?itemID=1124&itemType=PRODUCT Oxisolv Rust Remover] Merchant description: dissolves rust and leaves behind a zinc phosphate coating. Spray/brush/dip. Non-toxic, non-flammable, and re-usable. Must be cleaned off before priming. | ||
*[http://www.eastwoodco.com/jump.jsp?itemID=11122&itemType=PRODUCT Eastwood Rust Dissolver] Merchant description: acid free rust remover, leaves surface ready to paint, plate, or powder coat. Suitable for engine parts, and harmless to copper, brass, aluminum, solder, lead, plastic, rubber, seals, wood or vinyl. Surface must remain wet for product to work. $40/gallon. | *[http://www.eastwoodco.com/jump.jsp?itemID=11122&itemType=PRODUCT Eastwood Rust Dissolver] Merchant description: acid free rust remover, leaves surface ready to paint, plate, or powder coat. Suitable for engine parts, and harmless to copper, brass, aluminum, solder, lead, plastic, rubber, seals, wood or vinyl. Surface must remain wet for product to work. $40/gallon. | ||
*[http://sem.ws/product.php?product_id=164 Rust-Mort] Merchant's description: "Converts rust to a black or grayish, hard, insoluble, protective coating". | *[http://sem.ws/product.php?product_id=164 Rust-Mort] Merchant's description: "Converts rust to a black or grayish, hard, insoluble, protective coating". | ||
| − | *[http://sem.ws/product.php?product_id=206 SEM Rust-Seal] | + | *[http://sem.ws/product.php?product_id=206 SEM Rust-Seal] Manufacturer description: "Transforms rust leaving a tough, permanent, black protective coating. RUST-SEAL can be left exposed or may be top coated with enamels, lacquers or urethanes." |
| − | (Make sure that none of the above count as "encapsulators". Also, what about the converters that leave a "protective film" on the metal. They say that they don't need neutralization, and they don't need to be washed off. Is this as good as cleaning to bare metal, and then hitting with epoxy primer?) | + | ''(Make sure that none of the above count as "encapsulators". Also, what about the converters that leave a "protective film" on the metal. They say that they don't need neutralization, and they don't need to be washed off. Is this as good as cleaning to bare metal, and then hitting with epoxy primer?)'' |
*Vinegar | *Vinegar | ||
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*[http://solutions.3m.com/wps/portal/3M/en_US/3MAutomotive/Aftermarket/Products/Product-Catalog/?PC_7_0_53BC_root=GST1T4S9TCgv&PC_7_0_53BC_output=html&PC_7_0_53BC_gvel=6DTWTJQPBBgl&PC_7_0_53BC_vroot=GSLPLPKL4Xge&PC_7_0_53BC_node=GS3H3CPLMLbe&PC_7_0_53BC_theme=en_US_aad_portal&PC_7_0_53BC_command=CustomizePageHandler 3M Rust Fighter application wand] | *[http://solutions.3m.com/wps/portal/3M/en_US/3MAutomotive/Aftermarket/Products/Product-Catalog/?PC_7_0_53BC_root=GST1T4S9TCgv&PC_7_0_53BC_output=html&PC_7_0_53BC_gvel=6DTWTJQPBBgl&PC_7_0_53BC_vroot=GSLPLPKL4Xge&PC_7_0_53BC_node=GS3H3CPLMLbe&PC_7_0_53BC_theme=en_US_aad_portal&PC_7_0_53BC_command=CustomizePageHandler 3M Rust Fighter application wand] | ||
*[http://solutions.3m.com/wps/portal/3M/en_US/3MAutomotive/Aftermarket/Products/Product-Catalog/?PC_7_0_53BC_root=GST1T4S9TCgv&PC_7_0_53BC_output=html&PC_7_0_53BC_gvel=6DTWTJQPBBgl&PC_7_0_53BC_vroot=GSLPLPKL4Xge&PC_7_0_53BC_node=GSQJ0YVJLSbe&PC_7_0_53BC_theme=en_US_aad_portal&PC_7_0_53BC_command=CustomizePageHandler 3M Rust Fighter] | *[http://solutions.3m.com/wps/portal/3M/en_US/3MAutomotive/Aftermarket/Products/Product-Catalog/?PC_7_0_53BC_root=GST1T4S9TCgv&PC_7_0_53BC_output=html&PC_7_0_53BC_gvel=6DTWTJQPBBgl&PC_7_0_53BC_vroot=GSLPLPKL4Xge&PC_7_0_53BC_node=GSQJ0YVJLSbe&PC_7_0_53BC_theme=en_US_aad_portal&PC_7_0_53BC_command=CustomizePageHandler 3M Rust Fighter] | ||
| + | *[http://enjenjoesproducts.com/cg020001.html Brownpolymer rust inhibitor long term] -- Merchant description: displaces water on metal parts to prevent rust. environmentally Safe,It's a Cleaner,It's a Polish,It's a Lube, It's a Grease,It's a Protective Coating,Multi Use Polymer Substance | ||
*You can make your own basic rust protection coating from 1 part anhydrous lanolin (available from a pharmacy), and 5 parts paint thinner. | *You can make your own basic rust protection coating from 1 part anhydrous lanolin (available from a pharmacy), and 5 parts paint thinner. | ||
*For machine tools, this is recommended: http://www.clclubricants.com/waylubes.htm . | *For machine tools, this is recommended: http://www.clclubricants.com/waylubes.htm . | ||
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''Main article: [[Epoxy primer]].'' | ''Main article: [[Epoxy primer]].'' | ||
| − | Epoxy primer/sealer is a non-porous finish that is typically recommended as the first basecoat over bare steel. Various epoxy primers can also be applied over fiberglass, plastic, or the black iron phosphate coating that remains after "converting" rust. | + | Epoxy primer/sealer is a non-porous finish that is typically recommended as the first basecoat over bare steel. Various epoxy primers can also be applied over [[Fiberglassing|fiberglass]], plastic, or the black iron phosphate coating that remains after "converting" rust. |
Epoxy primer is a two-part mix, with a hardener that has to be added before spraying. Body fillers and high-build primers can be used on top of epoxy primer. | Epoxy primer is a two-part mix, with a hardener that has to be added before spraying. Body fillers and high-build primers can be used on top of epoxy primer. | ||
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===Metal washes, wax and grease removers=== | ===Metal washes, wax and grease removers=== | ||
*[http://www.eastwoodco.com/jump.jsp?itemID=258&itemType=PRODUCT&path=1%2C2%2C458%2C467%2C473&KickerID=39&KICKER Eastwood Metal Wash]. Merchant's description: dry compound that is mixed with water. removes grease and oils from bare metal, and leaves behind corrosion inhibitors that prevent flash rusting and promote paint adhesion. $11 for enough dry mix to make 7 quarts. | *[http://www.eastwoodco.com/jump.jsp?itemID=258&itemType=PRODUCT&path=1%2C2%2C458%2C467%2C473&KickerID=39&KICKER Eastwood Metal Wash]. Merchant's description: dry compound that is mixed with water. removes grease and oils from bare metal, and leaves behind corrosion inhibitors that prevent flash rusting and promote paint adhesion. $11 for enough dry mix to make 7 quarts. | ||
| − | *[http://www.aerospace.henkel.com/index.cfm?ID=178 Metalprep 79] | + | *[http://www.aerospace.henkel.com/index.cfm?ID=178 Metalprep 79] Manufacturer's description: phosphoric acid-based cleaner. leaves surface chemically clean and corrosion free. thoroughly rinse with water when done. brush/spray/dip |
*Is DuPont's "Quick-Prep" equivalent to Metalprep? | *Is DuPont's "Quick-Prep" equivalent to Metalprep? | ||
| − | Read this thread thoroughly: http://www.hotrodders.com/forum/what-else-wax-grease-remover-besides-mineral-spirits-51150.html | + | Read this thread thoroughly: [http://www.hotrodders.com/forum/what-else-wax-grease-remover-besides-mineral-spirits-51150.html What to use to remove wax, etc.] |
The following are not to be used as metal cleaners: lacquer thinner, acetone, reducers. Use the product within the recommendations of your product system. Cleaners typically vary as to strength, and time they take to evaporate. | The following are not to be used as metal cleaners: lacquer thinner, acetone, reducers. Use the product within the recommendations of your product system. Cleaners typically vary as to strength, and time they take to evaporate. | ||
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*Sand paper. 36 grit to 220 grit. | *Sand paper. 36 grit to 220 grit. | ||
*Wire wheel on drill. When the wire bristles start to bend one way, reverse the drill and work in the other direction for a while. | *Wire wheel on drill. When the wire bristles start to bend one way, reverse the drill and work in the other direction for a while. | ||
| − | *Wire wheel on grinder, or, these discs are considered to be superior to wire wheels: [http://solutions.3m.com/wps/portal/3M/en_US/Manufacturing/Industry/Product-Catalog/Online-Catalog/?PC_7_0_4UVL_root=GST1T4S9TCgv&PC_7_0_4UVL_output=html&PC_7_0_4UVL_gvel=H55CPWS904gl&PC_7_0_4UVL_vroot=81LC4NNTD4ge&PC_7_0_4UVL_node=RCM96XTX07be&PC_7_0_4UVL_theme=en_us_manufacturingindustry_portal&PC_7_0_4UVL_command=CustomizePageHandler 3M clean & strip disc], or [http://solutions.3m.com/wps/portal/3M/en_US/Marine/Home/Products/Catalog/?PC_7_0_4S4T_root=GST1T4S9TCgv&PC_7_0_4S4T_output=html&PC_7_0_4S4T_gvel=RJ5GMFSMV0gl&PC_7_0_4S4T_vroot=GS4JK4Y166ge&PC_7_0_4S4T_node=GSGKXWRKYVbe&PC_7_0_4S4T_theme=en_US_marineproducts_portal&PC_7_0_4S4T_command=AbcPageHandler 3M bristle disc], or [http://solutions.3m.com/wps/portal/3M/en_US/Marine/Home/Products/Catalog/?PC_7_0_4S4T_command=AbcPageHandler&PC_7_0_4S4T_theme=en_US_marineproducts_portal&PC_7_0_4S4T_output=html&PC_7_0_4S4T_vroot=GS4JK4Y166ge&PC_7_0_4S4T_gvel=RJ5GMFSMV0gl&PC_7_0_4S4T_node=GSVDY2CZYDbe&PC_7_0_4S4T_root=GST1T4S9TCgv Surface Conditioning Disc] | + | *Wire wheel on grinder, or, these discs are considered to be superior to wire wheels: [http://solutions.3m.com/wps/portal/3M/en_US/Manufacturing/Industry/Product-Catalog/Online-Catalog/?PC_7_0_4UVL_root=GST1T4S9TCgv&PC_7_0_4UVL_output=html&PC_7_0_4UVL_gvel=H55CPWS904gl&PC_7_0_4UVL_vroot=81LC4NNTD4ge&PC_7_0_4UVL_node=RCM96XTX07be&PC_7_0_4UVL_theme=en_us_manufacturingindustry_portal&PC_7_0_4UVL_command=CustomizePageHandler 3M clean & strip disc], or [http://solutions.3m.com/wps/portal/3M/en_US/Marine/Home/Products/Catalog/?PC_7_0_4S4T_root=GST1T4S9TCgv&PC_7_0_4S4T_output=html&PC_7_0_4S4T_gvel=RJ5GMFSMV0gl&PC_7_0_4S4T_vroot=GS4JK4Y166ge&PC_7_0_4S4T_node=GSGKXWRKYVbe&PC_7_0_4S4T_theme=en_US_marineproducts_portal&PC_7_0_4S4T_command=AbcPageHandler 3M bristle disc], or [http://solutions.3m.com/wps/portal/3M/en_US/Marine/Home/Products/Catalog/?PC_7_0_4S4T_command=AbcPageHandler&PC_7_0_4S4T_theme=en_US_marineproducts_portal&PC_7_0_4S4T_output=html&PC_7_0_4S4T_vroot=GS4JK4Y166ge&PC_7_0_4S4T_gvel=RJ5GMFSMV0gl&PC_7_0_4S4T_node=GSVDY2CZYDbe&PC_7_0_4S4T_root=GST1T4S9TCgv Surface Conditioning Disc]. |
*Scotch-brite pads | *Scotch-brite pads | ||
*Steel toothbrush | *Steel toothbrush | ||
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*Steel wool | *Steel wool | ||
| − | Tips | + | ===Tips=== |
| − | *When using a wire wheel, don't sit in one spot for too long -- | + | *When using a wire wheel, don't sit in one spot for too long -- the localized heat from friction can warp sheet metal. |
==Methods== | ==Methods== | ||
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#Sand with 180 grit. | #Sand with 180 grit. | ||
#Use wax and grease remover, and then spray with epoxy primer. | #Use wax and grease remover, and then spray with epoxy primer. | ||
| − | #From there, you can apply body filler (the epoxy may need to be scuffed, read instructions) | + | #From there, you can apply body filler (the epoxy may need to be scuffed, read instructions). |
#When the filler work is done, scuff with a red scotch-brite pad. | #When the filler work is done, scuff with a red scotch-brite pad. | ||
#Then, apply two more coats of epoxy, followed by high-build primer. | #Then, apply two more coats of epoxy, followed by high-build primer. | ||
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====Getting the entire vehicle body dipped==== | ====Getting the entire vehicle body dipped==== | ||
| − | Need more info on Redi-Strip. What chemical do they use? What's the cost? Can a hobbyist acquire and use the same chemical that Redi-Strip uses? When the body is returned to you, is it truly completely clean, or does it have to be cleaned to get all of the chemical removed from nooks and crannies, etc.? | + | ''(Need more info on Redi-Strip. What chemical do they use? What's the cost? Can a hobbyist acquire and use the same chemical that Redi-Strip uses? When the body is returned to you, is it truly completely clean, or does it have to be cleaned to get all of the chemical removed from nooks and crannies, etc.?)'' |
====Quick fix for exposed areas (dents, etc.)==== | ====Quick fix for exposed areas (dents, etc.)==== | ||
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====Storing body panels==== | ====Storing body panels==== | ||
| − | Use epoxy primer ( | + | Use epoxy primer (aka "epoxy primer/sealer"), it won't allow rust. Not the same as regular primer. |
Wet-sand down to 400 grit, wash/dry, grind down rust to bare metal, apply body filler where needed, blow off, clean with prep-sol or similar cleaner, tape it up, and prime with epoxy primer. | Wet-sand down to 400 grit, wash/dry, grind down rust to bare metal, apply body filler where needed, blow off, clean with prep-sol or similar cleaner, tape it up, and prime with epoxy primer. | ||
| Line 321: | Line 323: | ||
====Rusted window channels==== | ====Rusted window channels==== | ||
| − | Difficult to fabricate, need more info on this. | + | ''(Difficult to fabricate, need more info on this.)'' |
===Vinyl tops=== | ===Vinyl tops=== | ||
Rust is common in vinyl tops. The vinyl gets porous after a few years, and lets in moisture. | Rust is common in vinyl tops. The vinyl gets porous after a few years, and lets in moisture. | ||
| − | How to prevent? | + | ''(How to prevent?)'' |
| + | |||
| + | Vaseline ,push it in between the moldings around the top and wipe off excess.Spray a heavy oil around Landau /opera windows let sit and wipe off excess any little tears should also have a drop of silicone pushed in them to avoid moisture. | ||
===Leaf spring rust=== | ===Leaf spring rust=== | ||
| Line 335: | Line 339: | ||
===Cleaning light surface rust off crankshaft=== | ===Cleaning light surface rust off crankshaft=== | ||
| − | |||
| − | + | Have a machine shop polish the journals. | |
| + | |||
| + | May require a regrind to the next correct bearing size prior to polishing depending on tolerances. | ||
| + | |||
| + | Using a decent regular flow of CRC 5.56 or a PTFE type spray and an M3 grey scotchy (then try green scotchbrite if need) rubbed in direction of crank travel, localised to effected area. Mask off area with masking tape to prevent scratching unaffected areas if necessary. | ||
| + | |||
| + | Rust is tough, and large areas vigourously rubbed (mechanically or otherwise) may cause damage to the finish of the journal. Initial contact needs to be with clean CRC rinsed rag, keep the journal area clean and use a light touch, buffing in one direction until the initial rust colour no longer shows. | ||
| + | |||
| + | If sand paper is to be employed, try starting with 2000 grit (no less than 1200 grit), change paper regularly, and keep the strokes light. You are only removing the outer scale, you are not resurfacing the journal just rubbing out rust. | ||
| + | |||
| + | Phosphoric acid localised can help in any pits. | ||
| + | |||
| + | Acids on hardened steels can cause embrittlement so dont leave it on long, only enough to blacken the rust. Afterwards switching to a microfibre rag with a product like Autosol, Blue Magic or even Brasso, you can polish out any minor scratches on the journal. Steel wool usually isn't recommended as it can scratch the journal finish, and it creates fine particles that must be throuoghly cleaned from the crank. If rust is more than 0.005" deep get it resurfaced. | ||
| − | + | Also- | |
| − | + | * Very fine steel wool or scotchbrite pad, and light oil. Rub around the journals in the direction of rotation, not across. | |
| + | * Cut 600 grit wet or dry sandpaper into strips the width of the crank journals. Wrap it around the journal, and secure it with tape. Then, make a strap from leather, about one-half the width of the sandpaper strips. Use the strap on the paper in a shoeshine motion. Finish off with some light oil on the sandpaper. Do a few strokes first, then clean the paper, because the rust will clog the sandpaper. | ||
| − | LP3 as rust inhibitor on crankshafts? | + | ''(LP3 as rust inhibitor on crankshafts?)'' |
===Electrolysis=== | ===Electrolysis=== | ||
Advantages: self-limiting (can't remove too much), safe (low electrical current), won't harm good metal, not an acid (less dangerous, and no risk of hydrogen embrittlement) | Advantages: self-limiting (can't remove too much), safe (low electrical current), won't harm good metal, not an acid (less dangerous, and no risk of hydrogen embrittlement) | ||
| − | Need: a plastic tub, | + | Need: a plastic tub, iron electrode, water and washing soda (sodium carbonate), and a batter charger. About 1 tablespoon of soda per gallon of water. Can't find washing soda, then lye will work. Wear eye protection and protect skin too. Connect the electrode to the positive battery terminal. Connect the rusted object to the negative terminal. Submerge the object. Make sure the contact is good (may need to clean off some of the rust from the rusty part). Typically takes a few hours, but can take up to overnight. Rinse or scrub with brush to remove final rust debris. May need to re-treat. Oil, wax, or prime soon after. Surface of rusted metals is black after treatment. |
Be creative to clean oddly-shaped objects: | Be creative to clean oddly-shaped objects: | ||
| Line 360: | Line 376: | ||
====Resources==== | ====Resources==== | ||
| + | *[[Electrolytic rust removal]] Crankshaft Coalition wiki article | ||
*http://www.stovebolt.com/techtips/rust/electrolytic_derusting.htm | *http://www.stovebolt.com/techtips/rust/electrolytic_derusting.htm | ||
*http://hotrodders.com/forum/rust-removal-lower-arms-other-suspension-parts-108384.html | *http://hotrodders.com/forum/rust-removal-lower-arms-other-suspension-parts-108384.html | ||
| Line 369: | Line 386: | ||
===How to remove rust from chrome=== | ===How to remove rust from chrome=== | ||
| − | + | *Mag wheel polish, or [http://www.turtlewax.com/main.taf?p=2,1,4,12 Turtle Wax Chrome Polish]. | |
| + | *Fine steel wool, scotch-brite pads, crumpled-up pieces of aluminum foil. | ||
===Preventing engine rust=== | ===Preventing engine rust=== | ||
Engine storage spray, or wipe down with [http://www.marvelmysteryoil.com/ Marvel Mystery Oil]. | Engine storage spray, or wipe down with [http://www.marvelmysteryoil.com/ Marvel Mystery Oil]. | ||
| − | Cylinder walls with flash rust: | + | Cylinder walls with flash rust: Marvel Mystery Oil, steel wool, etc. Pitted rusting will necessitate a rebuild. |
===How to de-rust gas tanks=== | ===How to de-rust gas tanks=== | ||
| Line 382: | Line 400: | ||
Flush with CLR, Kool Klean (can't find). Manufacturers of CLR say that it shouldn't be used in a radiator: http://www.jelmar.com/CLRbasic.asp . | Flush with CLR, Kool Klean (can't find). Manufacturers of CLR say that it shouldn't be used in a radiator: http://www.jelmar.com/CLRbasic.asp . | ||
| − | When building an engine, to prevent rust: when done washing it and blowing it dry, oil it down, and store it in a plastic bag -- sealed (confirm this). | + | When building an engine, to prevent rust: when done washing it and blowing it dry, oil it down, and store it in a plastic bag -- sealed ''(confirm this)''. |
==="Oiling" your car=== | ==="Oiling" your car=== | ||
| Line 415: | Line 433: | ||
*[http://www.ruststopnorthamerica.com/electronic-rustproofing-rust-proofing.htm Rust Stop North America] | *[http://www.ruststopnorthamerica.com/electronic-rustproofing-rust-proofing.htm Rust Stop North America] | ||
| − | This is known as [http://en.wikipedia.org/wiki/Cathodic_protection cathodic protection] | + | ''(This is known as [http://en.wikipedia.org/wiki/Cathodic_protection cathodic protection]. Research this. And: [http://en.wikipedia.org/wiki/Sacrificial_anode sacrificial anode] and [http://en.wikipedia.org/wiki/Galvanic_anode galvanic anode].)'' |
===Frame rust=== | ===Frame rust=== | ||
| Line 451: | Line 469: | ||
*One option is to use chemical paint stripper, then use a sandblaster to lightly "dust" the remaining rust. | *One option is to use chemical paint stripper, then use a sandblaster to lightly "dust" the remaining rust. | ||
*Media blasting can remove good metal from body panels too. Also, used media can have metal particles left in the media. | *Media blasting can remove good metal from body panels too. Also, used media can have metal particles left in the media. | ||
| − | *Soda blasting can remove light rust, and won't warp panels. However, when soda blasting body panels, the resultant film can negatively affect finish adhesion. | + | *Soda blasting can remove light rust, and won't warp panels. However, when soda blasting body panels, the resultant film can negatively affect finish adhesion. For more details, see: [[Soda blasting]]. |
=Miscellaneous= | =Miscellaneous= | ||
| Line 467: | Line 485: | ||
Many modern automotive body panels are galvanized. | Many modern automotive body panels are galvanized. | ||
| − | You can buy cold galvanizing spray (list examples here) | + | You can buy cold galvanizing spray. ''(list examples here)'' |
==Hydrogen embrittlement== | ==Hydrogen embrittlement== | ||
| Line 473: | Line 491: | ||
==Fiberglass resin patches== | ==Fiberglass resin patches== | ||
| − | One technique that has been recommended is to grind/clean the rust, tape the underside of the panel to be patched, and then fill the holes with fiberglass resin, then paint and undercoat. This trick is not really a good idea -- when the body flexes, there will be cracks in the fiberglass pieces. Metal also expands at different rates than fiberglass, causing cracks to form, allowing more rust to form in these cracks. | + | One technique that has been recommended is to grind/clean the rust, tape the underside of the panel to be patched, and then fill the holes with fiberglass resin, then paint and undercoat. This trick is not really a good idea -- when the body flexes, there will be cracks in the fiberglass pieces. Metal also expands at different rates than [[Fiberglassing|fiberglass]], causing cracks to form, allowing more rust to form in these cracks. |
| + | |||
| + | Using POR-15 (a moisture-cured urethane) and fiberglass cloth will produce a low-cost repair that will bond and flex with the metal. In fact, POR-15 sells a $20 kit to do this very thing. While this method does fill the holes and provides a rust-resistant repair, it does not restore any mechanical strength to the metal like an actual metal patch panel would. | ||
==Do metal etches leave coating?== | ==Do metal etches leave coating?== | ||
| Line 491: | Line 511: | ||
==What about riveting in patch panels?== | ==What about riveting in patch panels?== | ||
| − | Very low-end solution, like fiberglass patching metal. Panel adhesives are a better choice when you can't weld. | + | Very low-end solution, like [[fiberglass]] patching metal. Panel adhesives are a better choice when you can't weld. |
| − | + | ||
| − | + | ||
=Resource dump= | =Resource dump= | ||
'''Drop links in here if they're relevant to this article. They'll be reviewed, incorporated, and referenced.''' | '''Drop links in here if they're relevant to this article. They'll be reviewed, incorporated, and referenced.''' | ||
| − | + | *[http://www.carcraft.com/howto/24544/ CarCraft article on using POR-15 and fiberglass mat for hole repair] | |
| + | *[http://lasertronics.com/ Lasertronics.com] | ||
*[http://www.theruststore.com/rust_info.aspx articles at theruststore.com] | *[http://www.theruststore.com/rust_info.aspx articles at theruststore.com] | ||
*http://www.corrosionsource.com/index.htm | *http://www.corrosionsource.com/index.htm | ||
| Line 532: | Line 551: | ||
*[http://www.metalwebnews.com/howto/rust/rust.html MetalWeb Rust Primer] | *[http://www.metalwebnews.com/howto/rust/rust.html MetalWeb Rust Primer] | ||
*[http://www.bhi.co.uk/hints/rust.htm Electrolytic Rust removal FAQ] | *[http://www.bhi.co.uk/hints/rust.htm Electrolytic Rust removal FAQ] | ||
| − | * | + | *http://en.wikipedia.org/wiki/Galvanization |
| − | * | + | *http://en.wikipedia.org/wiki/Hematite |
| − | * | + | *http://en.wikipedia.org/wiki/Magnetite |
| − | * | + | *http://en.wikipedia.org/wiki/Conversion_coating |
| − | * | + | *http://en.wikipedia.org/wiki/Iron_oxide |
*[http://science.howstuffworks.com/question445.htm How does rust work?] HowStuffWorks.com | *[http://science.howstuffworks.com/question445.htm How does rust work?] HowStuffWorks.com | ||
*[http://www.a2zautoforums.com/showthread.php?t=700 Quarter panel rust fix], ''A2Z Automotive Forums'', March 26, 2002. | *[http://www.a2zautoforums.com/showthread.php?t=700 Quarter panel rust fix], ''A2Z Automotive Forums'', March 26, 2002. | ||
| Line 633: | Line 652: | ||
[[Category:Body and exterior]] | [[Category:Body and exterior]] | ||
[[Category:Good articles]] | [[Category:Good articles]] | ||
| + | [[Category:Garage and shop]] | ||
| + | [[Category:General hotrodding]] | ||
{{youcanedit}} | {{youcanedit}} | ||
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