Cl<sup>-</sup>含量對2A12鋁合金初期腐蝕行為的影響

李濤; 李曉剛; 董超芳; 周建龍; 馮佃臣; 吳軍

doi:10.13374/j.issn1001-053x.2009.12.009

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Cl^-含量對2A12鋁合金初期腐蝕行為的影響

doi: 10.13374/j.issn1001-053x.2009.12.009

1. 北京科技大學材料科學與工程學院, 北京 100083;
2. 內蒙古科技大學材料與冶金工程學院, 包頭 014010;
3. 南昌航空大學材料科學與工程學院, 南昌 330063

基金項目:

科技部國家科學基礎條件平臺建設項目(No.2005DKA10400)

詳細信息

作者簡介:
李濤(1974-),女,副教授,博士研究生;李曉剛(1963-),男,教授,博士生導師,E-mail:lixiaogang99@263.net

中圖分類號: TG172.3
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- 文章訪問數: 264
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- PDF下載量: 4
- 被引次數: 0
出版歷程
- 收稿日期: 2009-04-20
- 網絡出版日期: 2021-08-09

Influence of Cl^- concentration on the initial corrosion behavior of 2A12 aluminum alloy

1. School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, China;
2. School of Materials & Metallurgy, Inner Mongolia University of Science and Technology, Baotou 014010, China;
3. School of Materials Science and Engineering, Nanchang Hangkong University, Nanchang 330063, China

摘要

摘要: 通過干濕周浸加速實驗方法、掃描電鏡觀察和電化學阻抗譜測試技術,研究了2A12鋁合金的初期腐蝕規律與電化學行為.實驗結果表明,干濕周浸48h后,所有Cl^-溶液中試樣都發生了明顯的點蝕.提高Cl^-含量可以促進點蝕的形成和發展,同時腐蝕產物增多.當Cl^-含量低時,腐蝕過程主要受電荷轉移電阻控制;隨Cl^-含量增加,其電化學特征轉變為受電荷轉移電阻和Warburg阻抗擴散混合控制.
- 鋁合金 /
- 周浸實驗 /
- 電化學阻抗譜 /
- 點蝕 /
- 初期腐蝕
Abstract: The initial corrosion laws and electrochemical behaviors of 2A12 aluminum alloy were investigated by using alternate immersion test, scanning electron microscopy (SEM) as well as electrochemical impedance spectroscopy (EIS). The results showed that obvious pitting phenomena were observed for all the specimens in various Cl^- containing solutions after 48h alternate immersion. With the increase of Cl^- concentration, the initiation and development of pitting corrosion were promoted and more corrosion products formed. At a lower Cl^- concentration, the corrosion process was mainly controlled by charge transfer resistance; with increasing Cl^- concentration, the electrochemical characteristic transferred to the mixed control of charge transfer resistance and Warburg resistance.
- aluminum alloys /
- alternate immersion /
- electrochemical impedance spectroscopy（EIS） /
- pitting corrosion /
- initial corrosion