AlO2−对KF-KOH电解液中AZ61镁合金等离子体电解氧化涂层的影响

IF 2.1 4区材料科学 Q3 MATERIALS SCIENCE, MULTIDISCIPLINARY

JOM Pub Date : 2025-02-10 DOI:10.1007/s11837-025-07152-1

Mengjiao Jin, Peng Zhang, Weiyi Zhang, Xiaoqian Sun, Yunhui Du

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引用次数: 0

摘要

在KF-KOH碱性电解液中加入NaAlO2，采用等离子体电解氧化（PEO）法制备AZ61镁合金镀层，研究了AlO2−对镀层相组成、孔隙率、耐蚀性和耐磨性的影响。这表明，在本研究中，由于AlO2−的加入，新相MgAl2O4主要被引入到PEO涂层中，从而减少了孔隙率，改善了表面形貌，提高了耐蚀性和耐磨性。NaAlO2浓度15 g / L时,样品拥有最好的微观结构和性能,最小的孔隙度为3.23%,最积极−0.93 V / SCE的腐蚀电位,腐蚀电流最低的4.88×10−8厘米−2,最低0.55摩擦系数和磨损率最低的0.88 mm3 / N m。结果表明,引入AlO2−PEO过程中确实是一个可行的和有效的方法促进镁合金涂层的质量。

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AlO2− Effects on Plasma Electrolytic Oxidation Coating of AZ61 Mg Alloy in KF-KOH Electrolyte

By adding NaAlO₂ to the KF-KOH basic electrolyte, coatings were formed on AZ61 Mg alloy by plasma electrolytic oxidation (PEO) process, and AlO₂⁻ effects on phase composition, porosity, corrosion and wear resistance of the coating were investigated. This showed that the new phase MgAl₂O₄ was mainly introduced into the PEO coatings because of the addition of AlO₂⁻, leading to the reduction of porosity, improvement of surface morphology and enhancement of corrosion and wear resistance in this study. When the NaAlO₂ concentration was 15 g/L, the sample possessed the best microstructure and performance, with the smallest porosity of 3.23%, the most positive corrosion potential of − 0.93 V/SCE, the lowest corrosion current of 4.88 × 10⁻⁸ A cm⁻², the minimum friction coefficient of 0.55 and the lowest wear rate of 0.88 mm³/N m. The results demonstrate that introducing AlO₂⁻ in the PEO process is indeed a feasible and effective way to promote the quality of Mg alloy coating.

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来源期刊

JOM 工程技术-材料科学：综合

CiteScore

4.50

自引率

3.80%

发文量

540

审稿时长

2.8 months

期刊介绍： JOM is a technical journal devoted to exploring the many aspects of materials science and engineering. JOM reports scholarly work that explores the state-of-the-art processing, fabrication, design, and application of metals, ceramics, plastics, composites, and other materials. In pursuing this goal, JOM strives to balance the interests of the laboratory and the marketplace by reporting academic, industrial, and government-sponsored work from around the world.