| 前处理工艺对镁合金钛/锆转化膜耐蚀性能的影响 |
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| 引用本文： | 张书弟,李丽华,杨延格,张涛,王福会.前处理工艺对镁合金钛/锆转化膜耐蚀性能的影响[J].腐蚀科学与防护技术,2016,28(5):461-467. |
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| 作者姓名： | 张书弟 李丽华 杨延格 张涛 王福会 |
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| 作者单位： | 1. 沈阳理工大学环境与化学工程学院 沈阳 1101592. 中国科学院金属研究所 金属腐蚀与防护实验室 沈阳 110016 |
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| 摘 要： | 研究了酸洗以及酸洗+碱洗前处理工艺对AZ91D镁合金无铬、无裂纹、低能耗钛/锆转化膜耐蚀性能的影响。结果表明,单独的酸洗前处理使得AZ91D镁合金表面的α相优先溶解,合金表面粗糙度增加,不利于钛/锆转化膜耐蚀性能的增加。合理地利用酸洗+碱洗调整AZ91D镁合金表面化学状态能够有效提高钛/锆化学转化膜的耐蚀性能。
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| 关 键 词： | 镁合金 钛锆转化膜 前处理 耐蚀性能 |
Effect of Pre-treatment on Corrosion Resistance of Titanate-zirconate Conversion Coating on Magnesium Alloy |
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| Shudi ZHANG,Lihua LI,Yange YANG,Tao ZHANG,Fuhui WANG.Effect of Pre-treatment on Corrosion Resistance of Titanate-zirconate Conversion Coating on Magnesium Alloy[J].Corrosion Science and Protection Technology,2016,28(5):461-467. |
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| Authors: | Shudi ZHANG Lihua LI Yange YANG Tao ZHANG Fuhui WANG |
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| Abstract: | Effect of pre-treatment processes including acid pickling and acid pickling plus alkaline cleaning on the corrosion resistance of achromium-free zirconate-titanate based conversion coating on AZ91D magnesium alloy was systematically investigated. The results indicated that the acid pickling could induce the preferential dissolution of α phase and thereby increase the surface roughness of AZ91D magnesium alloy, but which was not conductive to the enhancement of the corrosion resistance of the conversion coating. However, the acid pickling plus alkaline cleaning could appropriately modulate the surface chemical state of AZ91D magnesium alloy, and therefore effectively improve the corrosion resistance of the zirconate-titanate based conversion coating. |
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| Keywords: | magnesium alloy zirconate-titanate based conversion coating pre-treatment corrosion resistance |
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