高铁散热器用<strong>3003</strong>铝合金焊接隔板的腐蚀机理研究

doi:10.11902/1005.4537.2023.268

中国腐蚀与防护学报

2024, Vol. 44

Issue (4): 1081-1088 CSTR: 32134.14.1005.4537.2023.268 DOI: 10.11902/1005.4537.2023.268

轻质合金腐蚀与防护专栏

本期目录 | 过刊浏览

高铁散热器用3003铝合金焊接隔板的腐蚀机理研究

巫海亮¹, 陈宇强¹(

), 黄亮², 顾宏宇², 孙宏博¹, 刘佳俊¹, 王乃光³, 宋宇峰¹

1.湖南科技大学高功效轻合金构件成形技术及耐损伤性能评价湖南省工程研究中心湘潭 411201
2.株洲时代金属制造有限公司株洲 412200
3.广东工业大学材料与能源学院广州 510006

Corrosion Behavior of Welded Partitions of 3003 Al-alloy Used for Radiators of High-speed Train

WU Hailiang¹, CHEN Yuqiang¹(

), HUANG Liang², GU Hongyu², SUN Hongbo¹, LIU Jiajun¹, WANG Naiguang³, SONG Yufeng¹

1. Hunan Engineering Research Center of Forming Technology and Damage Resistance Evaluation for High Efficiency Light Alloy Components, Hunan University of Science and Technology, Xiangtan 411201, China
2. Zhuzhou Times Metal Manufacturing Co., Ltd., Zhuzhou 412200, China
3. School of Materials and Energy, Guangdong University of Technology, Guangzhou 510006, China

引用本文:

巫海亮, 陈宇强, 黄亮, 顾宏宇, 孙宏博, 刘佳俊, 王乃光, 宋宇峰. 高铁散热器用3003铝合金焊接隔板的腐蚀机理研究[J]. 中国腐蚀与防护学报, 2024, 44(4): 1081-1088.
Hailiang WU, Yuqiang CHEN, Liang HUANG, Hongyu GU, Hongbo SUN, Jiajun LIU, Naiguang WANG, Yufeng SONG. Corrosion Behavior of Welded Partitions of 3003 Al-alloy Used for Radiators of High-speed Train[J]. Journal of Chinese Society for Corrosion and protection, 2024, 44(4): 1081-1088.

全文: PDF(10829 KB) HTML

摘要:

采用X射线荧光光谱(XRF)、扫描电镜(SEM)、电化学阻抗谱(EIS)和极化曲线分析了实际环境中的沉积粉尘对高铁散热器用3003铝合金焊接隔板腐蚀行为的影响机理，并建立了铝合金焊接隔板的腐蚀深度预测模型。结果表明，在粉尘溶液环境中，铝合金焊接隔板在腐蚀初期以点蚀为主，随后演变为沿晶腐蚀。铝合金焊接隔板的主要腐蚀产物为Al(OH)₃和AlCl₃。铝合金焊接隔板经粉尘溶液全浸180 d后，腐蚀电位下降了24.5%，腐蚀电流密度提高了156.7 %。结合全浸实验和实际服役8 a的构件腐蚀深度测试结果，建立了高铁散热器用铝合金焊接隔板最大腐蚀深度预测模型。

关键词 ： 3003铝合金, 耐蚀性, 腐蚀机理, 腐蚀模型, 腐蚀深度预测模型

Abstract：

The corrosion behavior of welded partitions of 3003 Al-alloy, used for radiators of high-speed train, in artificial solution of settling dust, which aims to simulate the synergistic ation of the settling dusts and rains on the partitions in the real service, was studied by means of immersion test, polarization curve measurement, X-ray fluorescence (XRF), scanning electron microscopy (SEM), and electrochemical impedance spectroscopy (EIS). Meanwhile, the relevant prediction model for the corrosion depth of welded partitions was established. The results show that, the pitting corrosion is dominant at the initial stage of corrosion, and then gradually evolves into intergranular corrosion. The main corrosion products of welded partitions are Al(OH)₃ and AlCl₃. In comparison with those of the as received ones, the corrosion potential of welded partitions after immersion for 180 d decreases by 24.5% and the corrosion current density increases by 156.7%. A prediction model for the maximum corrosion depth of welded partitions was established based on data of the immersion test results and the measured corrosion depth of the very welded partitions after 8 a of live vehicle service.

Key words： 3003 Al-alloy corrosion-resistance corrosion behavior corrosion model corrosion depth prediction model

收稿日期: 2023-08-25 32134.14.1005.4537.2023.268

ZTFLH:

TG174

基金资助:国家自然科学基金(52075166);国家自然科学基金(U21A20130);湖南创新型省份建设专项(2021GK4048);湖南创新型省份建设专项(2023RC1068)

通讯作者: 陈宇强，E-mail：yqchen1984@163.com，研究方向为高性能金属材料

Corresponding author: CHEN Yuqiang, E-mail: yqchen1984@163.com

作者简介: 巫海亮，男，1996年生，硕士生

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https://www.jcscp.org/CN/10.11902/1005.4537.2023.268 或 https://www.jcscp.org/CN/Y2024/V44/I4/1081

图1 3003铝合金焊接隔板在粉尘溶液中全浸不同时间后的SEM形貌及EDS分析

图2 3003铝合金焊接隔板剖面在粉尘溶液中全浸不同时间后的剖面金相形貌

图3 3003铝合金焊接隔板在粉尘溶液中全浸7 d后的XPS谱

图4 3003铝合金焊接隔板在粉尘溶液中全浸不同时间后的极化曲线

表1 3003铝合金焊接隔板经粉尘溶液全浸不同时间后的极化曲线拟合参数

图5 3003铝合金在粉尘溶液全浸不同时间后的Nyquist图及相应等效电路图

表2 在粉尘溶液中全浸不同时间后3003铝合金焊接隔板的EIS拟合的参数

图6 服役8 a后高铁散热器铝合金焊接隔板形貌及EDS结果

图7 3003铝合金焊接隔板的腐蚀模型

图8 3003铝合金焊接隔板最大腐蚀深度预测曲线

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