Salt spray corrosion test of micro-plasma oxidation ceramic coatings on Ti alloy
来源期刊：Rare Metals2007年第6期
论文作者：HAO Guodong, ), YAO Zhongping), and JIANG Zhaohua) ) Department of Applied Chemistry, Harbin Institute of Technology, Harbin , China ) Mudanjiang Normal College, Mudanjiang , China
文章页码：560 - 564
摘 要：Ceramic coatings were prepared on Ti-6Al-4V alloy in NaAlO2 solution by micro-plasma oxidation （MPO）. The salt spray tests of the coated samples and the substrates were carried out in a salt spray test machine. The phase composition and surface morphology of the coatings were investigated by XRD and SEM. Severe corrosion occurred on the substrate surface, while there were no obvious corrosion phenomena on the coated samples. The coatings were composed of Al2TiO5 and a little α-Al2O3 and rutile TiO2, and the salt spray test did not change the composition of the coatings. The weight loss rate of the coatings decreased with increasing MPO time because of the increase in density and thickness of the coatings. The surface morphology of the coatings was influenced by salt spray corrosion test. Among the coated samples, the coating prepared for 2 h has the best corrosion resistance under salt spray test.
HAO Guodong1, 2), YAO Zhongping1), and JIANG Zhaohua1) 1) Department of Applied Chemistry, Harbin Institute of Technology, Harbin 150001, China 2) Mudanjiang Normal College, Mudanjiang 157012, China
摘 要：Ceramic coatings were prepared on Ti-6Al-4V alloy in NaAlO2 solution by micro-plasma oxidation （MPO）. The salt spray tests of the coated samples and the substrates were carried out in a salt spray test machine. The phase composition and surface morphology of the coatings were investigated by XRD and SEM. Severe corrosion occurred on the substrate surface, while there were no obvious corrosion phenomena on the coated samples. The coatings were composed of Al2TiO5 and a little α-Al2O3 and rutile TiO2, and the salt spray test did not change the composition of the coatings. The weight loss rate of the coatings decreased with increasing MPO time because of the increase in density and thickness of the coatings. The surface morphology of the coatings was influenced by salt spray corrosion test. Among the coated samples, the coating prepared for 2 h has the best corrosion resistance under salt spray test.
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