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 water rinse 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. |
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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. |
− | *If used perfectly, it works | + | *If used perfectly, it works perfectly. |
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==Reasons for not using phosphoric acid== | ==Reasons for not using phosphoric acid== | ||
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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== | ||
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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]] |