Oxidation and Adhesion of Decorative Nickel-Chromium Plating on Ferritic Stainless Steel

Abstract:

Decorative Ni-Cr plating on ferritic stainless steel was exposed to pure carbon dioxide (CO₂) at 200 and 300oC for 180 hours under continuous and cyclic oxidation tests. After oxidation test, weight changes of samples exposed to CO₂ were found to be less than that of samples exposed to air. However, weight changes were dependent on temperature and oxidation conditions. Heat-quench test was operated at temperature of 200-500oC for determining adhesion behavior of decorative Ni-Cr plating. From the heat-quench test, it revealed that adhesion ability between Ni-Cr plating layer and substrate increased with thickness of Ni pre-plating layer at temperature of 200 and 300°C. But, at temperature above 300°C, the adhesion ability increased with surface roughness of substrate before coating. In order to achieve important properties of decorative Ni-Cr plating, i.e., oxidation resistance, beautiful appearance and good adhesion, surface of substrate was necessarily prepared under medium roughness and then it was pre-plated with the thickest Ni layer before Cr coating was applied.

• Periodical: Advanced Materials Research (Volumes 785-786)
• Pages: 852-857
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.785-786.852
• Online since: September 2013
• Authors: Thipusa Wongpinij, Pornwasa Wongpanya
• Keywords: Adhesion, Carbon Dioxide, Decorative Ni-Cr Plating, Ferritic Stainless Steel, Oxidation

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