Phosphoric acid as metal pretreatment
(→Reasons for using phosphoric acid) |
(→Ospho) |
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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. A quick water | + | #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 | ||
==Naval jelly== | ==Naval jelly== | ||
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