What is acid etch primer?
Etch Primer is a paint that is designed to physically bond itself to the substrate to which it is applied. This is achieved by combining an acid with the paint so that the acid microscopically etches the surface of the substrate, thus forming a physical and chemical bond between the two.
What’s etching primer used for?
‘Etch primers’ (wash primers) are more appropriately considered as part of the pre-treatment process. They are used to promote adhesion (especially with non-ferrous metals) and give a measure of temporary protection to ferrous metals. They must be overcoated with a fully pigmented primer.
What is an acid etching?
Acid etching, also known as photo etching, chemical etching or chemical milling, is a sheet metalworking technology which uses acid etchants to machine complex, highly accurate precision metal components.
Can etch primer go over paint?
When applied to paint they can cause chipping and corrosion to the existing paint surface. This will require sanding as well as a fair amount of grunt work just to get the car ready to be primed again. For this reason you should not use self-etching primer on existing paint or gloss finish.
Is etch primer waterproof?
They just clean/treat the metal. Still a good idea, but not waterproof.
Does etching primer stop rust?
It’s purely a surface coating, and it doesn’t stop the rust. It does, however, prevent the rust problem from worsening. You need to make sure that you apply self etching primer to bare metal that’s been thoroughly cleaned in order for it to be fully effective.
What is chemical etching process?
Chemical etching, also known as chemical milling or photo etching, is a subtractive sheet metal machining process which uses chemical etchants to create complex and highly accurate precision components from almost any metal. We have been at the forefront of etching technology for almost 60 years.
Which material is used for chemical etching?
What chemical is used in etching? Most metals are etched using ferric chloride, a safe to use, recyclable etchant. Ferric chloride can be regenerated and reused. Other proprietary etchants such as nitric acid, are used for specialist metals and alloys.
Does etch primer need to be sanded?
In any complete restoration or body repair project, you will to sand primer at one point or another. However, most manufacturers of self-etching primer, due to the acid base of the products, don’t recommend directly sanding the self-etching primer.
What is the difference between epoxy primer and etch primer?
With epoxy, you can lay it over just about anything, body work, sanded paint, metal and you’re going to be fine. With Self-Etch, if put it over different layers of paint, if put on too wet, it’s going to lift because Self-Etching primer has acid in it. Be aware of this. Epoxy can be more expensive, but then again….