Corrosion and Oxidation Resistance of Electroless Ni-P-Al2O3 Composite Coatings on Carbon Steel

Abstract:

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Electroless Ni-P and Ni-P-Al2O3 composite coatings on low carbon steel (Q235) sheets were prepared by adopting optimum plating process. The cross-section morphology and structure as well as the phase transformation of the composite coatings were studied by scanning electron microscopy(SEM), X-ray diffraction(XRD). It was shown that the Al2O3 particles homogeneously dispersed in the entire Ni-P film matrix, and the structure of Ni-P-Al2O3 composite coatings as deposited was amorphous. The corrosion behaviors were evaluated by electrochemical tests. The experimental results indicated that the corrosion resistance of Ni-P-Al2O3 coatings was superior to Ni-P coatings due to the effect of Al2O3 particles. In addition, the oxidation resistance test, which was carried out by using oxidation weight method, showed that ternary Ni-P-Al2O3 composite coating had a better oxidation resistance than Ni-P coating.

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Periodical:

Edited by:

Shengyi Li, Yingchun Liu, Rongbo Zhu, Hongguang Li, Wensi Ding

Pages:

831-835

DOI:

10.4028/www.scientific.net/AMM.34-35.831

Citation:

W. C. Sun et al., "Corrosion and Oxidation Resistance of Electroless Ni-P-Al2O3 Composite Coatings on Carbon Steel", Applied Mechanics and Materials, Vols. 34-35, pp. 831-835, 2010

Online since:

October 2010

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$35.00

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