2531 High Corrosion Resistant Zinc- Nickel Yellow Trivalent Chromating Passivation
Name：2531 High Corrosion Resistant Zinc- Nickel Yellow Trivalent Chromating Passivation
1.Contains no Cr(Ⅵ) and oxidant , thereby producing no Cr(Ⅵ) in the deposits, which has been verified for SGS standard. It is an environmentally friendly product and adapted for the exported orders to European and America.
2.Produces clean, bright and slightly iridescent yellow film, which is not easy to be hazy.
3.Exhibits strong corrosion resistance, the deposits by rack plating not sealed can last 1000 hours in ASTM B-117 neutral salt spraying without red rust. It is especially good for automotive part industry.
4.The corrosion resistance and appearance remain after heat treatment.
5.2531A for make-up and 2531B for replenishment. Easy operation and maintenance, long lasting and low costs.
Consumption: 2531 yellow chromating agent: 2-3L/10000dm2（weight:1 ton）.