1, MX-ZN-D-51H is an environment-friendly trivalent black passivation agent, dedicated to zinc-nickel coating.

2, MX-ZN-D-51H produce uniform black passivation film, with the follow-up closed, black and good anti-corrosion properties.

3, black passivation film, uniform black and bright, excellent performance.

4, the proposed nickel content of zinc nickel coating control in the 12-15% is better.

5. Bath stability, build a small bath, a single component of the concentrated liquid, a wide range of operations, easy to produce.