High Corrosion Resistant Zn Ni/Ni/Cr Multilayer Coating And Methods Thereof

Abstract: ABSTRACT “HIGH CORROSION RESISTANT ZN-NI/NI/CR MULTILAYER COATING AND METHODS THEREOF” The present disclosure provides a Zn-Ni/Ni/Cr Multilayer Coating for steel substrates comprising: a Zn-Ni alloy layer on the steel substrate; a Ni layer on the Zn-Ni alloy layer; and 5 a Cr layer on the Ni layer. The presence of the Zn-Ni alloy layer adjacent to the steel provides sacrificial corrosion protection to steel. Additionally, the structure of the coating reduces the number and thickness of layers in the multilayer coating. The multilayer coating of the present disclosure exhibits a very high corrosion resistance compared to commercially available Ni/Cr or Cu/Ni/Cr multilayer coatings and stainless steel. Moreover, the Zn-Ni alloy layer is 10 compatible with the Ni and Cr layers of the coating thereby providing adherent and corrosion resistant decorative multilayer coatings. The present disclosure also provides a method for depositing the multilayer coating described above on a steel substrate as well as the coated steel substrate. Figure 1

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