电流密度对 6063 铝合金黑色 MAO 涂层微观结构、机械性能和耐腐蚀性的影响

IF 4.3 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Materials Chemistry and Physics Pub Date : 2024-08-07 DOI:10.1016/j.matchemphys.2024.129800

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引用次数: 0

摘要

使用碱性硅酸盐电解液在不同电流密度下在 6063 铝合金上制备了黑色微弧氧化（MAO）涂层。研究了电流密度对黑色陶瓷涂层的微观结构、机械性能和耐腐蚀性的影响。实验结果表明，电流密度可以提高工艺电压，增强 MAO 反应，增加涂层厚度，减少孔隙率，增加表面粗糙度，改善机械性能（硬度、附着力、摩擦力和磨损）。以 6A/dm 的电流密度制备的黑色 MAO 涂层在 3.5 wt% 的 NaCl 溶液中具有最佳的耐腐蚀性，其腐蚀电流密度为 3.713 × 10 A/cm，比 4A/cm 低 2 个数量级。耐腐蚀性结果通过浸泡腐蚀试验得到了进一步证实。

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Effect of current density on microstructure, mechanical behavior and corrosion resistance of black MAO coating on 6063 aluminum alloy

Black micro-arc oxidation (MAO) coatings were prepared on 6063 aluminum alloy using alkaline silicate electrolyte at different current densities. Effect of current densities on the microstructure, mechanical behavior and corrosion resistance of black ceramic coatings was studied. The experimental results indicated that the current density could increase the process voltage, enhance the MAO reaction, increase the coating thickness, reduce the poriness, increase the surface roughness, and improve the mechanical properties (hardness, adhesion, friction and wear). The black MAO coating prepared in the current density with 6A/dm² had the best corrosion resistance in 3.5 wt% NaCl solution, as manifested by a corrosion current density of 3.713 × 10⁻⁷ A/cm² that was 2 orders of magnitude less than that of the 4A/cm². The corrosion resistance results were further confirmed through an immersion corrosion test.

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来源期刊

Materials Chemistry and Physics 工程技术-材料科学：综合

CiteScore

8.70

自引率

4.30%

发文量

1515

审稿时长

69 days

期刊介绍： Materials Chemistry and Physics is devoted to short communications, full-length research papers and feature articles on interrelationships among structure, properties, processing and performance of materials. The Editors welcome manuscripts on thin films, surface and interface science, materials degradation and reliability, metallurgy, semiconductors and optoelectronic materials, fine ceramics, magnetics, superconductors, specialty polymers, nano-materials and composite materials.