CADMIUM REPLACEMENT Zn-Ni COATING
Trichrome passivated Zn-Ni coating has been developed as a replacement for the conventional chrome passivated cadmium coating on PH, CM and NCM steels. The coating upon subjecting to continuous salt spray exposure did not show any white rust formation up to 96 h and no red rust formation was observed up to 500 h as per AMS 2417E. Highly adherent and pore free coating has been developed on bushes. The TRL level of this coating technology is 4-5.
Trichrome passivated Zn-Ni coated bush