sinkkifosfatointi
Sinkkifosfatointi is a surface treatment process used to improve the corrosion resistance and paint adhesion of metal surfaces, primarily steel and aluminum. The process involves immersing the metal part in a phosphoric acid solution containing zinc ions and other additives. During the reaction, a thin, insoluble layer of zinc phosphate crystals forms on the metal surface. This crystalline layer is amorphous and porous, providing a good base for subsequent coating operations.
The thickness and structure of the phosphate layer can be controlled by adjusting parameters such as bath
Beyond its primary functions of corrosion protection and paint adhesion, zinc phosphating also offers some degree