表面技术2018，Vol.47Issue(1)：198-202,5.DOI:10.16490/j.cnki.issn.1001-3660.2018.01.031
2024铝合金混合酸阳极氧化
2024 Aluminum Alloy Anodic Oxidation in Mixed Acid
摘要
Abstract
The work aims to study difference in anodized film thickness, surface morphology, corrosion resistance, etc. by anodizing 2024 aluminium alloy in mixed acid solution and preparing anodized films. The 2024 aluminium alloy was anodized in sulfuric acid - sulfosalicylic acid - lactic acid system. Changes in surface morphology, microhardness, thickness, crystal structure and corrosion resistance were observed by changing oxidation time (20~60 min) and oxidation current density (2.5~4.5 A/dm2). A series of anodized film was obtained by maintaining the oxidation time at 40 min and changing current density. The self-corrosion potential was the most positive and close to 0.0 V when current density was 3.0 A/dm2. The corrosion potential decreased as the current density increased. The corrosion potential was the most negative (-1.1 V) when the current density was 4.5 A/dm2. A series of anodized film was obtained by maintaining current density at 2.5 A/dm2and changing oxidization time. The corrosion resistance was the best and the self-corrosion resistance was -0.6 V when the oxidization time reached 50 min. The XRD analysis showed that the anodized films were composed of γ-Al2O3and α-Al2O3. The microhardness and thickness of the anodized films increased as the current density and oxidization time increased. The anodized layers exhibit the best corrosion resistance provided with the current density of 3.0 A/dm2and oxidation time of 50 min.关键词
铝合金2024/混合酸/阳极氧化/抗蚀性/硬度/表面形貌Key words
2024 aluminum alloy/mixed acid/anodic oxidation/corrosion resistance/hardness/surface morphology分类
矿业与冶金引用本文复制引用
戴一帆,沈士泰,卢洁琴,卫国英..2024铝合金混合酸阳极氧化[J].表面技术,2018,47(1):198-202,5.基金项目
国家自然科学基金(51471156) （51471156）
浙江省新苗人才计划项目(2016R409038)Supported by the Natural Science Funds of China (51471156) and Zhejiang Xinmiao Talents Program (2016R409038) （2016R409038）
