铜铝层状复合板中性盐雾腐蚀行为研究

doi:10.11902/1005.4537.2020.217

中国腐蚀与防护学报

2021, Vol. 41

Issue (2): 241-247 DOI: 10.11902/1005.4537.2020.217

研究报告

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铜铝层状复合板中性盐雾腐蚀行为研究

张艺凡, 袁晓光, 黄宏军, 左晓姣(

), 程禹霖

沈阳工业大学材料科学与工程学院沈阳 110870

Corrosion Behavior of Cu-Al Laminated Board in Neutral Salt Fog Environment

ZHANG Yifan, YUAN Xiaoguang, HUANG Hongjun, ZUO Xiaojiao(

), CHENG Yulin

Materials Science and Engineering, Shenyang University of Technology, Shenyang 110870, China

全文: PDF(4908 KB) HTML

摘要:

采取模拟大气环境的室内中性盐雾腐蚀实验，探讨了铜铝层状复合材料的腐蚀行为。通过扫描电镜 (SEM) 观察腐蚀后铜铝界面形貌，结合X射线衍射仪 (XRD) 和能谱仪 (EDS) 分析腐蚀产物成分，并通过电化学检测分析试样经过不同时间盐雾腐蚀后的表面腐蚀状态，探讨铜铝复合板在服役环境下的腐蚀机制。结果表明：铜铝复合板在盐雾环境下铜铝构成腐蚀原电池，Al为阳极铜为阴极，阴阳极面积比越大，腐蚀速率越大。随着腐蚀的不断进行，铜铝界面的Cu一侧发生腐蚀，且靠近界面的位置腐蚀最为严重，随着腐蚀时间延长，铝基体出现严重的剥蚀现象，Cu几乎无变化。腐蚀产物成分为Al₂O₃，Al(OH)₃和AlO(OH)，电化学结果显示：铜铝复合板在腐蚀的过程中，腐蚀速率呈现先增加后减小再增加的趋势。

关键词 ：铜铝层状复合板, 盐雾腐蚀, 电化学, 失重, 腐蚀产物

Abstract：

The corrosion behavior of Cu-Al laminated boards was investigated by means of indoor neutral salt spray test, aiming to simulate the atmospheric environment induced corrosion, and electrochemical workstation, as well as scanning electron microscopy (SEM) with energy spectrometer (EDS), and X-ray diffractometer (XRD). The results show that Cu- and Al-laminates act as corrosion galvanic couple in salt spray environment, where the Cu plays as cathode, while Al as anode. The greater the area ratio of cathode to anode, the greater the corrosion rate. As the corrosion continued, the corrosion mainly occurred on the Al plate , and the corrosion was the most serious near the interface of the Cu-Al plates, serious denudation corrosion may appear on the Al-plate for long-term corrosion, while the Cu plate has almost no change. The corrosion products composed mainly of Al₂O₃, Al(OH)₃ and AlO(OH). The electrochemical results show that during the corrosion process, the corrosion rate of Cu-Al composite laminated board increased firstly, then decreased and finally increased again.

Key words： copper-aluminum laminated plate salt fog corrosion electrochemical mass loss corrosion product

收稿日期: 2020-10-29

ZTFLH:

TG174

基金资助:国家自然基金科学(U1604251);辽宁省博士启动基;金(2019-BS-178)

通讯作者: 左晓姣 E-mail: kz_candy@163.com

Corresponding author: ZUO Xiaojiao E-mail: kz_candy@163.com

作者简介: 张艺凡，女，1994年生，博士生

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引用本文:

张艺凡, 袁晓光, 黄宏军, 左晓姣, 程禹霖. 铜铝层状复合板中性盐雾腐蚀行为研究[J]. 中国腐蚀与防护学报, 2021, 41(2): 241-247.
Yifan ZHANG, Xiaoguang YUAN, Hongjun HUANG, Xiaojiao ZUO, Yulin CHENG. Corrosion Behavior of Cu-Al Laminated Board in Neutral Salt Fog Environment. Journal of Chinese Society for Corrosion and protection, 2021, 41(2): 241-247.

链接本文:

https://www.jcscp.org/CN/10.11902/1005.4537.2020.217 或 https://www.jcscp.org/CN/Y2021/V41/I2/241

图1 铜铝复合板结构图

图2 不同阴阳极面积比的铜铝复合板极化曲线

表1 极化曲线拟合数据

图3 不同阴阳极面积比的铜铝复合板电化学阻抗谱

图4 电化学阻抗等效电路图

表2 电化学阻抗等效电路拟合数据

图5 盐雾腐蚀不同时间后的铜铝复合板极化曲线

表3 极化曲线拟合数据

图6 盐雾腐蚀不同时间后的铜铝复合板电化学阻抗谱

表4 电化学阻抗等效电路拟合数据

图7 不同盐雾腐蚀时间铜铝复合板界面形貌图

图8 腐蚀产物的XRD谱及EDS分析

图9 盐雾环境下的腐蚀动力学曲线

图10 铜铝复合板盐雾腐蚀示意图

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