Editing Phosphoric acid as metal pretreatment
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#Once Ospho has dried, there is no longer any acid on the surface to react with paint. | #Once Ospho has dried, there is no longer any acid on the surface to react with paint. | ||
| − | #Ospho is totally neutralized by reaction with both the rust particles and the steel underneath. | + | #Ospho is totally neutralized by reaction with both the rust particles and the steel underneath. A quick ,light water rinsewith a damp towel or a wax & grease remover will remove any dust-like reaction particles. |
| − | #Because Ospho is water-based, the water can hide in nooks and crannies, causing adhesion failure of primer | + | #Because Ospho is water-based, the water can hide in nooks and crannies, causing adhesion failure of primer always make sure metal is dry before using ospho or priming |
| − | + | *sand or scuff before priming then use a wax & grease remover to clean | |
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==Naval jelly== | ==Naval jelly== | ||
Naval jelly is considered safer to use than traditional liquid phosphoric acid metal pretreatments. For rust removal on body panels, the naval jelly is kept wet. Paint failures from phosphoric acid are thought to be caused by wiping on the acid, and letting it dry. | Naval jelly is considered safer to use than traditional liquid phosphoric acid metal pretreatments. For rust removal on body panels, the naval jelly is kept wet. Paint failures from phosphoric acid are thought to be caused by wiping on the acid, and letting it dry. | ||
| − | + | ''need details here on exact concentrations, and use of naval jelly vs. traditional phosphoric acid treatments'' | |
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==Reasons for using phosphoric acid== | ==Reasons for using phosphoric acid== | ||
*Inexpensive. | *Inexpensive. | ||
| − | *[[Media blasting]] has its own set of drawbacks | + | *[[Media blasting]] has its own set of drawbacks.for instance when done by an amiture can warp panels easily not to mention the health hazords and mess..should only be done by qualified professionals under proper conditions as far as sheetmetal goes... |
| − | *If used perfectly, it works | + | *If used perfectly, it works perfectly. |
| − | * | + | * no experiance is needed just reading skills(directions)and Protects bare metal from surface rust.. |
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==Reasons for not using phosphoric acid== | ==Reasons for not using phosphoric acid== | ||
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*Amateurs and [[First paint job|first-time painters]] are more likely to make errors. Phosphoric acid pretreatments must be used meticulously, and may be beneficial in an industrial or manufacturing environment. However, they can be catastrophic for beginners. | *Amateurs and [[First paint job|first-time painters]] are more likely to make errors. Phosphoric acid pretreatments must be used meticulously, and may be beneficial in an industrial or manufacturing environment. However, they can be catastrophic for beginners. | ||
| + | As with ANY paint material read directions to avoid problems DIY's as well as pros make a lot of mistakes with all paint related materials (pay attention) | ||
==Specific paint and primer failures caused by phosphoric acid pretreatments== | ==Specific paint and primer failures caused by phosphoric acid pretreatments== | ||
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==Published positions from primer and paint manufacturers== | ==Published positions from primer and paint manufacturers== | ||
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===Southern Polyurethanes, Inc.=== | ===Southern Polyurethanes, Inc.=== | ||
| − | *[http://www.southernpolyurethanes.com/tech%20sheets%20new/epOXY%202006.pdf Southern Polyurethanes | + | *[http://www.southernpolyurethanes.com/tech%20sheets%20new/epOXY%202006.pdf Southern Polyurethanes]: |
<blockquote> | <blockquote> | ||
''"NEVER use SPI Epoxy over a Soda Blasted vehicle, Acid Etch/Wash Primer, Rust Converter or other Metal Treatments. NEVER!"'' | ''"NEVER use SPI Epoxy over a Soda Blasted vehicle, Acid Etch/Wash Primer, Rust Converter or other Metal Treatments. NEVER!"'' | ||
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==Use of phosphoric acid in an industrial setting== | ==Use of phosphoric acid in an industrial setting== | ||
| − | '' | + | I've used "Ospho" to restore cars for over 25 yrs without a problem and wont prime a stripped car without it,no matter how it was stripped,(sanded,blasted or chemically).I believe the only people that dont like it haven't used it.or simply used it wrong...it works well with any type of primer or "ANY" brand ,so I totally disagree with (SPI)since thats the epoxy primer I use and prefer over all others...One of the few auto body products I swear by....posted by "deadbodyman" |
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==References== | ==References== | ||
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*http://www.skybryte.com/index.html | *http://www.skybryte.com/index.html | ||
*http://www.ospho.com/data.htm | *http://www.ospho.com/data.htm | ||
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[[Category:Body and exterior]] | [[Category:Body and exterior]] | ||
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