3种溶液体系下铝合金阳极氧化膜的性能_刘建华.pdf
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第 22 卷第 7 期 中国有色金属学报 2012 年 7 月
Vol.22 No.7 The Chinese Journal of Nonferrous Metals July 2012
文章编号:1004-0609(2012)07-2031-09
3 种溶液体系下铝合金阳极氧化膜的性能
刘建华,刘 洲,于 美,李松梅,陈高红
(北京航空航天大学 材料科学与工程学院,北京 100191)
摘 要:通过表面形貌观察、升压曲线测试、电化学阻抗谱(EIS)测试和疲劳性能测试等研究 LY12 铝合金铬酸阳
极氧化(CAA) 、硼酸−硫酸阳极氧化(BSAA)和己二酸−硫酸阳极氧化(ASAA)膜的性能。结果表明:CAA 膜和
ASAA 膜缺陷较少且缺陷边缘光滑,BSAA 膜缺陷数目较多且边缘较为粗糙。3 种氧化膜的耐蚀性良好,在 5%
NaCl(质量分数)溶液中浸泡 80 d 后,均未出现明显的破坏。对比氧化膜的壁垒层阻抗(Rb)发现,BSAA 的Rb 值下
降最大,约为 94%,CAA 和 ASAA 优于前者,其阻抗分别下降了 75%和 78% 。3 种阳极氧化技术对基体疲劳性
能的影响结果表明,CAA 处理降低基体的疲劳寿命值最小,约为 14%;ASAA 次之,约为 20% ;BSAA 对基本
疲劳性能的影响最大,约 25% 。
关键词:LY12 铝合金;阳极氧化膜;铬酸阳极氧化;硼酸−硫酸阳极氧化;己二酸−硫酸阳极氧化
中图分类号:TG174.42 文献标志码:A
Properties of aluminum alloy anodic films formed in
three kinds of solutions
LIU Jian-hua, LIU Zhou, YU Mei, LI Song-mei, CHEN Gao-hong
(School of Materials Science and Engineering, Beihang University, Beijing 100191, China)
Abstract: The properties of anodic films formed in chromic, boric-sulfuric and adipic-sulfuric acid (CAA, BSAA and
ASAA, respectively) on LY12 aluminum alloy were studied by morphology characterization, current—voltage response
test, electrochemical impedance spectroscopy (EIS) and fatigue test methods. It is indicated that in contrast with BSAA
film, CAA and ASAA films have less defects and a smoother periphery. All of three kinds of anodic films have perfect
corrosion resistant after immersed in 5% NaCl solution for 80 d. The resistance value (Rb) of the barrier layers of BSAA
decreases in greatest, while the Rb values of CAA and ASAA decrease by 75% and 78%, respe
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