Etch Primer/Bonding Coat
A pre-treatment for aluminium, copper, brass, cadmium, zinc, galvanising, nickel and carbon steel. An adhesion coat to abraded stainless steel.
Surface preparation
Steel
- Degrease where necessary to remove weld flux and general contamination prior to blasting
- All sharp edges should be ground and weld spatter removed
- Blast clean to Sa 2½ maximum profile 75 microns
Non-Ferrous Metals
- for galvanised surfaces: surface must be thoroughly degreased, rinsed with clean water and allowed to dry before coating; it is essential to remove all flux and zinc salts and high profile zinc spatter
- for aluminium, copper, brass, cadmium and nickel surfaces: thoroughly degrease and remove all verdigris,salts and other contaminants; wash with clean water and allow to dry
- for stainless steel: thoroughly abrade and degrease; all surfaces should be clean, dry and free from all grease, oil and general contamination
Example
Non Return ValveNon Return Valve
- blast cleaned to SA 2½
- 1st coat: fast-set, low temperature curing, EPA-compliant high-build epoxy zinc phosphate primer/finish bonding coat applied to the stainless steel
- 2nd coat: fast-set, low temperature curing, EPA-compliant high-build epoxy zinc phosphate