1. TR-127 does not contain hexavalent chromium or other harmful metals such as silver, fully meeting environmental requirements
2. TR-127 trivalent chromium black passivation agent can be used for alkaline zinc plating, and the passivation film is dark and shiny.
3. TR-127 belongs to a single component passivation solution, and the use of black passivation combined with a sealing agent can greatly improve the salt spray and corrosion resistance of the coating.
Operation and Application Indication