COATING, PAINTING AND PASSIVATION

Jolgraf offers high quality, cost effective coating, painting and passivation services. We offer both nitric and citric acid passivation , with variations in process time, acid temperature and concentration to meet our customer specifications.
The stainless steel has a natural oxide “passive” layer that protects it from corrosion. However when stainless steel is machined, cut or assembled, the stainless surface is often contaminated by the oils and greases used in the fabrication process. If not removed, this contamination will eventually lead to corrosion.
Contaminants are removed by cleaning the metal, and then use nitric acid to remove free iron from the surface. Slowly and naturally a “passive” layer is developed on the surface of the stainless steel, and it is once unreactive.