Znp70 trivalent chromium black passivation

ZNP 70 trivalent chromium black passivation

1) Trivalent chromium black passivation suitable for zinc nickel alloy process

2) In line with the EU ROHS environmental protection standard, the double agent liquid medicine has the advantages of simple operation and convenient adjustment.

3) After passivation, the appearance is uniform. With appropriate sealing agent, a uniform and bright black passivation layer can be formed

4) The passivation solution has long service life and low operation cost

5) Good corrosion resistance and simple wastewater treatment