The methods of 304 stianless steel pipes surface whitening processing

Feb,Thu,2022

There are many 304 stianless steel pipes surfae processing technologies. And whitening processig is one of these technologies.

During processing the 304 stianless steel pipes, we can whiten it, wind and flang. Its silver grey black oxide scale is consisted of NiCr2O4 and NiF EO4. But this method costs more and pollutes the environment. It is harmful to human health and has strong corrosion. Now, there are two methods removing the black scales:

1. Sand balsting: the black scale on the surface is mainly removed by spraying micro glass beads.

2. Chemical method: Impregnation with non-polluting pickling passivation paste, non-toxic cleaning solution with inorganic additives. So as to achieve the purpose of whitening treatment of 304 stainless steel tube. After processing, it basically looks like a dull color.