李晓娟,刘栋,刘哲,李秉忠.海洋环境中铝合金表面改性涂层的电化学性能[J].表面技术,2018,47(1):181-185.
LI Xiao-juan,LIU Dong,LIU Zhe,LI Bing-zhong.Electrochemical Performance of Surface Modification Coatings on Aluminum Alloy in Marine Environment[J].Surface Technology,2018,47(1):181-185 |
| 海洋环境中铝合金表面改性涂层的电化学性能 |
| Electrochemical Performance of Surface Modification Coatings on Aluminum Alloy in Marine Environment |
| 投稿时间：2017-07-13 修订日期：2018-01-20 |
| DOI：10.16490/j.cnki.issn.1001-3660.2018.01.028 |
| 中文关键词: 火焰喷涂 6061铝合金 Zn-Al涂层 电化学 |
| 英文关键词:flame spraying 6061 aluminum alloy Zn-Al coating electrochemistry |
| 基金项目:湖北省自然科学基金重点项目（2015CFA161） |
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| Author | Institution |
| LI Xiao-juan | State Key Laboratory of Special Surface Protection and Application Technology, Wuhan Research Institute of Material Protection, Wuhan 430030, China |
| LIU Dong | State Key Laboratory of Special Surface Protection and Application Technology, Wuhan Research Institute of Material Protection, Wuhan 430030, China |
| LIU Zhe | State Key Laboratory of Special Surface Protection and Application Technology, Wuhan Research Institute of Material Protection, Wuhan 430030, China |
| LI Bing-zhong | State Key Laboratory of Special Surface Protection and Application Technology, Wuhan Research Institute of Material Protection, Wuhan 430030, China |
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| 中文摘要: |
| 目的 对换热管用6061铝合金表面进行改性防护，研究一种在其表面具有牺牲性阳极保护效果且腐蚀速率小的涂层材料。方法 采用线材火焰喷涂工艺在6061铝合金表面制备不同成分的锌铝涂层，分别为纯Zn、Zn50、Al95、Al、Al-RE共5种涂层，使用SEM、EDS、XRD分析测试方法对涂层形貌及成分进行分析，并测定涂层在3.5％NaCl溶液中的Tafel曲线。结果 相同参数下在铝合金表面制备的涂层表观质量良好，无明显缺陷，符合热喷涂对于涂层质量的要求。常温环境下，Zn、Zn50、Al95、Al、Al-RE涂层的电位比6061铝合金的电位更负，5种涂层对6061铝合金都具有阳极性保护层的作用。结论 从腐蚀电流和腐蚀电位考虑，Al95、Al-RE作为牺牲性阳极保护涂层的作用会更好。 |
| 英文摘要: |
| The work aims to study a coating material exhibiting low corrosion rate and having low corrosion rate by providing modification protection for 6061 aluminum alloy surface for heat exchange tube use. Five different Zinc-Aluminum coatings, namely, pure Zn, Zn50, Al95, pure Al, Al-RE coatings, were prepared on the 6061 aluminum alloy surface by adopting wire flame spraying technology. Morphology and composition of the coatings were analyzed with SEM, EDS and XRD, and Tafel curves of the coatings in 3.5% NaCl solution were measured. Provided with the same parameters, the coatings prepared on aluminum alloy surface exhibited good appearance quality and no obvious flaws, and met requirements of thermal spraying for coating quality. Corrosion potential of the Zn, Zn50, Al95, pure Al, Al-RE coatings was more negative than that of 6061 aluminum alloy, the 5 coatings had the effect of anodic protective layer on 6061 aluminum alloy. In terms of corrosion current and corrosion potential, Al95 and Al-RE have better effects as sacrificial anode protective coatings. |
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