Influence of SiC Content and Heat Treatment on the Corrosion Resis-Tance and Oxidation Resistance of Ni-P-SiC Composite Coating

Abstract:

Ni-P alloy and SiC micron particles were codeposited on Q235 steel by electroless plating. The composition, microstructure, micro-hardness, corrosion resistance and oxidation resistance of the composite coating were studied. The results revealed that the deposited composite coating shows dispersed SiC particles and continuous Ni-P matrix. When the content of SiC was 8g/L and the heat treatment temperature was 300°C, the corrosion potential and corrosion current of Ni-P-SiC coating were-0.292V, and 8.2×10^-7 A/cm², respectively, while those of Ni-P composite coating were-0.501V, and 4.2×10^-5 A/cm², respectively. Ni-P-SiC composite coating with high content of SiC exhibits better oxidation resistance than Ni-P coating.

• Periodical: Materials Science Forum (Volume 817)
• Pages: 479-483
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.817.479
• Online since: April 2015
• Authors: Pan Li*, Wan Chang Sun, Jun Gao, Quan Zhou, Pei Zhang
• Keywords: Corrosion Resistance, Electroless Plating, Heat-Treatment, Ni-P-SiC Composite Coating, Oxidation Resistance

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