用微弧氧化方法在LC4超硬铝合金表面获得较厚的氧化膜,测定了氧化膜的生长曲线及电流密度变化,并用电化学方法测定不同厚度膜的极化曲线,采用零电阻技术测量3.5%NaCl溶液中LC4铝合金-铜电偶对电偶腐蚀情况.用扫描电镜观察合金基体和微弧氧化膜的腐蚀形貌.经过微弧氧化处理后,LC4超硬铝的腐蚀电流密度比基体降低几个数量级,腐蚀电位上升,耐腐蚀性能得到很大提高,但膜超过一定厚度时腐蚀电流密度反而有所升高.较厚的微弧氧化膜大幅度降低了LC4/Cu电偶对的电偶电流,电偶电位正向移动.
参考文献
| [1] | A. L. Yerokhin;X. Nie;A. Leyland;A. Matthews;S. J. Dowey .Plasma electrolysis for surface engineering[J].Surface & Coatings Technology,1999(2/3):73-93. |
| [2] | Xue WB.;Lai YC.;Chen RY.;Deng ZW. .Analysis of phase distribution for ceramic coatings formed by microarc oxidation on aluminum alloy[J].Journal of the American Ceramic Society,1998(5):1365-1368. |
| [3] | 张欣宇,石玉龙.等离子体微弧氧化技术及其应用[J].青岛化工学院学报(自然科学版),2002(01):69-73. |
| [4] | 薛文斌,王超,陈如意,李永良.ZL101铸造铝合金微弧氧化陶瓷层的组织和性能[J].材料热处理学报,2003(02):20-23. |
| [5] | 卢立红,沈德久,王玉林.工艺参数对铸造铝-硅合金微弧氧化层特性的影响[J].电镀与精饰,2001(01):32-34,40. |
| [6] | Xue W;Wang C;Deng Z et al.Mechanical properties evaluation of the microarc oxidation coatings and 2024 aluminum alloy substrate[J].Journal of Physics:Condensed Matter,2002,14:10947-10952. |
| [7] | Wenbin XUE;Jiancheng DU;Xiaoling WU;Yongchun LAI .Tribological Behavior of Microarc Oxidation Coatings on Aluminum Alloy[J].ISIJ International,2006(2):287-291. |
| [8] | Yerokhin A L;Voevodin A A;Lyubimov V V et al.Plasma electrolytic fabrication of oxide ceramic surface layer for tribotechnical purposes on aluminum alloys[J].Surface and Coatings Technology,1998,110:140-146. |
| [9] | Krishna LR.;Somaraju KRC.;Sundararajan G. .The tribological performance of ultra-hard ceramic composite coatings obtained through microarc oxidation[J].Surface & Coatings Technology,2003(0):484-490. |
| [10] | 徐拥军,崔增平,吕慧玲,王焰磊.铜铝结构热交换器的电偶腐蚀及控制[J].腐蚀与防护,2004(07):309-310. |
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