1, this product is a new type of galvanized black black passivating agent, no longer uses silver, iron and nickel and other metal salts as blackening ingredients, but uses organic matter and trivalent chromium and other film forming substances to produce black, even and dense passive film.
2. The passivation solution contains no other harmful metals such as six valence chromium and silver.
3, the operation is easy, the bath liquid is stable, and the color of the passivation film is black and black.
4, do not use iron salt to blacken, anticorrosion performance is good, neutral salt fog time more than 72 hours.
5. Suitable for all kinds of galvanized layers |
