A novel approach used to study the corrosion susceptibility of metallic materials at a dynamic seawater/air interface

IF 9.5 Corrosion Communications Pub Date : 2022-06-01 Epub Date: 2022-04-05 DOI:10.1016/j.corcom.2022.03.001

Da-Hai Xia , Yingchang Mao , Yu Zhu , Quan Yuan , Cheng-Man Deng , Wenbin Hu

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引用次数: 8

Abstract

A novel device is constructed to study the localized corrosion susceptibility of 2024 aluminum alloy at a dynamic seawater/air interface. Corrosion in three distinct regions are identified: full immersion region, seawater/air interfacial region (alternant wet/dry region), and atmosphere region. The corrosion process in the interfacial region over time was studied by EIS and the corrosion product was characterized by SEM. Experimental results revealed that, a layer of intense and uniform corrosion product was formed on the seawater/air interfacial region, due to the oxygen enrichment in that region. Pitting corrosion was more severe in the full immersion region than that in the seawater/air interface, as verified by a lower charge transfer resistance and more severe pitting corrosion and intergranular corrosion extent.

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一种研究金属材料在动态海水/空气界面腐蚀敏感性的新方法

设计了一种新型装置，用于研究2024铝合金在动态海水/空气界面下的局部腐蚀敏感性。确定了三个不同区域的腐蚀:完全浸入区，海水/空气界面区(湿/干交替区)和大气区。利用EIS研究了界面区域随时间的腐蚀过程，并用SEM对腐蚀产物进行了表征。实验结果表明，海水/空气界面区域由于氧的富集，形成了一层强烈而均匀的腐蚀产物。全浸区域的点蚀比海水/空气界面更严重，电荷转移阻力更小，点蚀和晶间腐蚀程度更严重。

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来源期刊

Corrosion Communications

CiteScore

7.30

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0.00%

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