为了系统了解微弧氧化电参数对铝合金微弧氧化膜耐蚀性的影响,采用自制的设备以恒流法在硅酸盐系电解液中对LY12铝合金进行微弧氧化处理.研究了频率、占空比、时间等参数对铝合金微弧氧化陶瓷层电化学腐蚀行为的影响.用扫描电镜(SEM)和电化学工作站等手段,分析了不同能量参数制备的陶瓷层的微观结构及耐蚀性.结果表明:随着频率增加,陶瓷层的腐蚀电位正移、腐蚀电流密度下降,阻抗值变大,耐蚀性变好;随占空比增大,陶瓷层的耐蚀性变差;随着氧化时间延长,陶瓷层明显变粗糙;随着膜厚增加,陶瓷层的腐蚀电位正移,腐蚀电流密度下降,阻抗值变大,陶瓷层对基体的保护作用增强.
参考文献
| [1] | 张先锋,蒋百灵.能量参数对镁合金微弧氧化陶瓷层耐蚀性的影响[J].腐蚀科学与防护技术,2005(03):141-143. |
| [2] | 曹楚南;张鉴清.电化学阻抗谱导论[M].北京:科学出版社,2007:32-36. |
| [3] | 曹楚南.腐蚀电化学[M].北京:化学工业出版社,2004:215-237. |
| [4] | 蒋百灵,白力静,蒋永锋,张淑芬.铝合金微弧氧化技术[J].西安理工大学学报,2000(02):138-142. |
| [5] | 贺子凯,唐培松.电流密度对微弧氧化膜层厚度和硬度的影响[J].表面技术,2003(03):21-24. |
| [6] | 付翀,郑晶,李尧.电参数对铝合金微弧氧化陶瓷层结构特性的影响[J].西安工程大学学报,2008(04):490-492,509. |
| [7] | Pei-Qiang Wu;J.-R Cells .Electrochemical noise measurements on stainless steel during corrosion-wear in sliding contacts[J].Wear: an International Journal on the Science and Technology of Friction, Lubrication and Wear,2004(5):480-490. |
| [8] | Jun Liang;Litian Hu;Jingcheng Hao .Improvement of corrosion properties of microarc oxidation coating on magnesium alloy by optimizing current density parameters[J].Applied Surface Science: A Journal Devoted to the Properties of Interfaces in Relation to the Synthesis and Behaviour of Materials,2007(16):6939-6945. |
| [9] | Hladky K;Dawson J L .The measurement of corrosion using electrochemical I/f noise[J].Corrosion Science,1982,22(04):231-237. |
| [10] | 陈宏,郝建民,王利捷.镁合金微弧氧化陶瓷层耐蚀性的电化学分析[J].腐蚀与防护,2004(09):383-385. |
| [11] | 蒋百灵,张淑芬.氧化镁陶瓷层的组织结构及耐蚀性能[J].西安理工大学学报,2000(04):327-329. |
| [12] | Li Wang;Li Chen;Zongcheng Yan .The influence of additives on the stability behavior of electrolyte, discharges and PEO films characteristics[J].Journal of Alloys and Compounds: An Interdisciplinary Journal of Materials Science and Solid-state Chemistry and Physics,2010(1/2):445-452. |
| [13] | 王德云,东青,陈传忠,雷廷权.微弧氧化技术的研究进展[J].硅酸盐学报,2005(09):1133-1138. |
| [14] | 蒋百灵,吴国建,张淑芬,雷廷权.镁合金微弧氧化陶瓷层生长过程及微观结构的研究[J].材料热处理学报,2002(01):5-7. |
| [15] | YANG Yue,WU Hua.Effect of current density on corrosion resistance of micro-arc oxide coatings on magnesium alloy[J].中国有色金属学报（英文版）,2010(z2):688-692. |
| [16] | J.L. Xu;F. Liu;F.P. Wang .The corrosion resistance behavior of Al_2O_3 coating prepared on NiTi alloy by micro-arc oxidation[J].Journal of Alloys and Compounds: An Interdisciplinary Journal of Materials Science and Solid-state Chemistry and Physics,2009(1/2):276-280. |
| [17] | 王志平,孙宇博,丁坤英,刘佳,蔡珣.纯铝微弧氧化陶瓷膜组织及耐腐蚀性能[J].焊接学报,2008(12):74-76. |
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%