Detection Content

Detection Purpose: Phosphating coating thickness, phosphating coating weight, phosphating film grain size, phosphating

Detection range: Phosphating coating, phosphating film coating, phosphating corrosion, all kinds of phosphating film.

Phosphating film:


Metal (mainly refers to iron and steel) after containing zinc (Zn), manganese (Mn), chromium (Cr), iron (Fe) and other phosphate solution treatment, on the surface of the base metal form an insoluble phosphate film, this process is called phosphating. Phosphating makes the metal surface form a protective film with good adhesion. Taking zinc phosphate as an example, in the presence of oxidant, the phosphating film generated is Zn3(PO4)2·. 4 h20 and Zn2Fe (PO4) 2 & middot; The crystal of 4H20. The phosphating film scintillation has light, gray porous (voidage is 0.5%~1.5% of the surface area of the film thickness), often 0.1— 50 & mu; M.