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
TG172; 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...
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| Published in | 材料保护 Vol. 58; no. 2; pp. 83 - 91 |
|---|---|
| Main Authors | , , , |
| Format | Journal Article |
| Language | Chinese |
| Published |
辽宁石油化工大学土木工程学院,辽宁抚顺 113001
15.02.2025
中国科学院金属研究所,辽宁沈阳 110016 辽宁忠旺集团有限公司,辽宁辽阳 111000%辽宁忠旺集团有限公司,辽宁辽阳 111000 |
| Subjects | |
| Online Access | Get full text |
| ISSN | 1001-1560 |
| DOI | 10.16577/j.issn.1001-1560.2025.0026 |
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| Abstract | TG172; 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. |
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| AbstractList | TG172; 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. |
| Abstract_FL | In order to investigate the corrosion behavior patterns of aluminum alloy in an environment containing SO2,the effect of the SO2 dep-osition 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 inhibito-ry 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 depo-sition 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. |
| Author | 石玲 李洪林 吴海旭 刘伟 |
| AuthorAffiliation | 辽宁石油化工大学土木工程学院,辽宁抚顺 113001;中国科学院金属研究所,辽宁沈阳 110016;辽宁忠旺集团有限公司,辽宁辽阳 111000%辽宁忠旺集团有限公司,辽宁辽阳 111000 |
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| Author_FL | LI Honglin SHI Ling LIU Wei WU Haixu |
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| DocumentTitle_FL | Effect of SO2 Deposition Rate on the Corrosion Behavior of 6061-T4 Aluminum Alloy in Simulated Marine Atmospheric Environments |
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| Keywords | 6061-T4铝合金 dry/wet alternating cycle corrosion test 干/湿交替循环 6061-T4 aluminum alloy 海洋大气腐蚀 腐蚀试验 SO2 deposition rate marine atmospheric corrosion 沉积速率 |
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| Publisher | 辽宁石油化工大学土木工程学院,辽宁抚顺 113001 中国科学院金属研究所,辽宁沈阳 110016 辽宁忠旺集团有限公司,辽宁辽阳 111000%辽宁忠旺集团有限公司,辽宁辽阳 111000 |
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| Title | 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 |
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