采用电化学方法研究了2A12铝合金基体、硬质阳极氧化膜层、不同厚度2A12铝合金微弧氧化陶瓷层的腐 蚀性能.结果表明,微弧氧化处理的铝合金样品耐蚀性能强烈地依赖于陶瓷层的厚度,陶瓷层越厚其耐腐蚀能力越强.随着微弧氧化时间的延长,陶瓷层回扫曲线的腐蚀电位逐渐高于正扫的腐蚀电位,说明没有局部腐蚀倾向,陶瓷层表面发生了再钝化,抗点蚀能力增强.采用局部电化学阻抗技术获得的微弧氧化陶瓷层表面阻抗的分布图结果表明,铝合金微弧氧化陶瓷层表面的阻抗分布很不均匀,与其表面形貌一致;微弧氧化60 min的陶瓷层表面的阻抗值在1.0×104~8.0×104 Ω之间,而微弧氧化90 min的陶瓷层表面的阻抗值在1.8×105~1.4×106 Ω之间.随着微弧氧化时间的延长,阻抗逐渐增大.
参考文献
[1] | 李均明,朱静,白力静.铝合金微弧氧化陶瓷层的磨损特性[J].材料保护,2005(01):27-29. |
[2] | Curran JA;Clyne TW .Thermo-physical properties of plasma electrolytic oxide coatings on aluminium[J].Surface & Coatings Technology,2005(2/3):168-176. |
[3] | 陈宏,冯忠绪,郝建民,李波.负脉冲对铝合金微弧氧化的影响[J].长安大学学报(自然科学版),2007(01):96-98. |
[4] | Yerokhin AL;Shatrov A;Samsonov V;Shashkov P;Pilkington A;Leyland A;Matthews A .Oxide ceramic coatings on aluminium alloys produced by a pulsed bipolar plasma electrolytic oxidation process[J].Surface & Coatings Technology,2005(2/3):150-157. |
[5] | 章妮,孙志华,张琦,蔡建平.局部阻抗测试技术在评定有机涂层环境失效中的应用[J].装备环境工程,2007(01):75-78,82. |
[6] | Nie X.;Meletis EI.;Jiang JC.;Leyland A.;Yerokhin AL.;Matthews A. .Abrasive wear/corrosion properties and TEM analysis of Al2O3 coatings fabricated using plasma electrolysis[J].Surface & Coatings Technology,2002(2/3):245-251. |
[7] | Barik RC;Wharton JA;Wood RJK;Stokes KR;Jones RL .Corrosion, erosion and erosion-corrosion performance of plasma electrolytic oxidation (PEO) deposited Al2O3 coatings[J].Surface & Coatings Technology,2005(2/3):158-167. |
[8] | Song HJ;Kim MK;Jung GC;Vang MS;Park YJ .The effects of spark anodizing treatment of pure titanium metals and titanium alloys on corrosion characteristics[J].Surface & Coatings Technology,2007(21):8738-8745. |
上一张
下一张
上一张
下一张
计量
- 下载量()
- 访问量()
文章评分
- 您的评分:
-
10%
-
20%
-
30%
-
40%
-
50%