Effect of Current Density on Ceramic Coating Prepared by Micro-arc Oxidation on 6061 Aluminum Alloy

Q4 Chemical Engineering

腐蚀科学与防护技术 Pub Date : 2014-04-23 DOI:10.11903/1002.6495.2013.128

H. Dong, Z. Niu, Dongshan Zhao, Guang-min Li

引用次数: 1

Abstract

Micro-arc oxidation coating on 6061 aluminum alloy was prepared in a Na2SiO3containing electrolyte by a constant current control mode, and the effect of current density on the microstructure and performance of micro-arc oxidation ceramic coating was studied by a series of tests. Results for the above coatings show that their thickness and surface roughness increase with the increasing current density, however, their corrosion resistance decrease, and their hardness increases first and then decreases with the increasing current density. The ceramic coatings are mainly composed of α-Al2O3and γ-Al2O3. As a comparison, a novel current control method was adopted to prepare a micro-arc oxidation coating. Accordingly, the amount of micro-cracks was significantly reduced, and the corrosion resistance was obviously enhanced for the coating prepared by the new mode.

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电流密度对6061铝合金微弧氧化陶瓷涂层的影响

采用恒流控制方式在含na2sio3的电解液中制备了6061铝合金微弧氧化陶瓷涂层，并通过一系列试验研究了电流密度对微弧氧化陶瓷涂层微观结构和性能的影响。结果表明，随着电流密度的增大，镀层的厚度和表面粗糙度增大，耐蚀性降低，硬度随电流密度的增大先增大后减小。陶瓷涂层主要由α- al2o3和γ-Al2O3组成。作为对比，采用一种新的电流控制方法制备微弧氧化涂层。因此，新模式制备的涂层微裂纹数量明显减少，耐蚀性明显增强。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

腐蚀科学与防护技术 Chemical Engineering-Chemical Engineering (all)

CiteScore

0.60

自引率

0.00%

发文量

2399

期刊介绍： Corrosion Science and Protection Technology is approved by the General Administration of Press and Publication of the State Council, the Chinese Academy of Sciences, the Chinese Academy of Sciences Institute of Metals organized by the domestic and international public circulation of national periodicals metal surface treatment academic journals. The journal is a professional and technical publication. It reports the scientific and technological achievements in the field of metal corrosion and protection, and publishes research reports, reviews, technical reports, research briefs, failure analysis, experience exchange, etc. The readers are engaged in the field of metal corrosion and protection. The target readers are scientific and technological personnel engaged in metal corrosion and protection and teachers and students of related professional colleges and universities. Corrosion Science and Protection Technology is indexed in CSCD, CSTPCD, CA,MA,SA and other authoritative databases.