Email Alert  RSS
研究论文

 SO2沉积速率对6061-T4铝合金在模拟海洋大气环境中腐蚀行为的影响

展开
  • 1辽宁石油化工大学土木工程学院; 2中国科学院金属研究所; 3辽宁忠旺集团有限公司
刘 伟(1978-),教授,硕士生导师,主要从事金属材料的腐蚀与防护研究,电话:13942329962,E-mail: liuwei2812@lnpu.edu.cn

收稿日期: 2024-06-04

  修回日期: 2024-11-16

  录用日期: 2024-11-18

  网络出版日期: 2025-03-20

基金资助

辽宁省教育厅项目(L2020030);中国石化催化剂有限公司攻关项目(KYC-WT-2022112201);中国石化催化剂有限公司攻关项目(2021210403000299)

Effect of SO2 Deposition Rate on the Corrosion Behavior of 6061-T4 Aluminum Alloy in Simulated Marine Atmospheric Environments

Expand
  • (1.School of Civil Engineering, Liaoning Petrochemical University, Fushun 113001, China;2.Institute of Metal Research Chinese Academy of Sciences, Shenyang 110016, China;3.Liaoning Zhongwang Group Co., Ltd., Liaoyang 111000, China)
LIU Wei(1978-), Professor, Master Supervisor, Research Focus: Corrosion and Protection of Metal Materials,Tel.: 13942329962, E-mail: liuwei2812@lnpu.edu.cn

Received date: 2024-06-04

  Revised date: 2024-11-16

  Accepted date: 2024-11-18

  Online published: 2025-03-20

Supported by

Scientific Research Projects in the Education Department of Liaoning Province(L2020030); Research and Development Project of Sinopec Catalyst Co., Ltd(KYC-WT-2022112201); Research and Development Project of Sinopec Catalyst Co., Ltd(2021210403000299)

摘要

为考察铝合金在含SO2环境中的腐蚀行为规律,通过干/湿交替循环腐蚀试验,结合电化学分析、EDS能谱分析、FTIR 分析等方法,研究了SO2沉积速率对6061-T4 铝合金在模拟海洋大气环境中腐蚀行为的影响。 结果表明:在试验范围内,较低的SO2沉积速率可显著促进腐蚀反应的进行,提高腐蚀速率。 但是,随着沉积速率逐渐增大,SO2对腐蚀反应的促进作用逐渐减弱,并在腐蚀后期出现抑制作用。 当SO2沉积速率增大至2 000 mg/(m2·d)时,SO2对腐蚀反应只呈现抑制作用。 SO2发生氧化、水解反应,生成SO42-与H,导致基体表面液膜酸化,是SO2促进铝合金腐蚀的主要原因。 SO2沉积量增大,导致基体与液膜界面处溶解氧的浓度梯度迅速降低,以及由Al2(SO4)3与AlCl3组成的腐蚀产物层阻碍腐蚀性介质接触基体表面,是SO2对铝合金的腐蚀反应产生抑制作用的主要原因。

本文引用格式

刘伟, 李洪林, 吴海旭, 石玲 .  SO2沉积速率对6061-T4铝合金在模拟海洋大气环境中腐蚀行为的影响[J]. 材料保护, 2025 , 58(2) : 83 -91 . DOI: 10.16577/j.issn.1001-1560.2025.0026

Abstract

In order to investigate the corrosion behavior patterns of aluminum alloy in an environment containing SO2,the effect of the SO2 deposition rate on the corrosion behavior of 6061-T4 aluminum alloy in a simulated marine atmospheric environment was studied through dry/wet alternating cyclic corrosion tests, combined with methods such as electrochemical analysis, EDS analysis, and FTIR analysis.Results showed that within the test range, a relatively low SO2 deposition rate could dramatically promote the corrosion reaction and increase the corrosion rate.However, as the deposition rate gradually increased, the promoting effect of SO2 on the corrosion reaction gradually weakened, and an inhibitory effect appeared in the later stage of corrosion.When the SO2 deposition rate increased to 2 000 mg/(m2·d), SO2 only showed an inhibitory effect on the corrosion behavior.SO2 was oxidized and hydrolyzed, and generated SO42- and H, leading to the acidification of the liquid film on the substrate surface, which was the main reason why SO2 promoted the corrosion of the aluminum alloy.Besides, the increase of SO2 deposition caused the rapid decrease of the concentration gradient of dissolved oxygen at the interface between the substrate and the liquid film, and the corrosion product layer composed of Al2(SO4)3 and AlCl3 prevented the corrosive medium from contacting the substrate surface, which was the main reason for the inhibition effect of SO2 on the corrosion reaction of aluminum alloy.
文章导航

/