Investigation of iron dissolution mechanism in acidic solutions with and without dissolved CO2 – Part II: ToF-SIMS 3D mapping

IF 1.1 4区材料科学 Q4 MATERIALS SCIENCE, MULTIDISCIPLINARY

Corrosion Pub Date : 2024-02-28 DOI:10.5006/4512

Luntao Wang, Huiru Wang, N. Moradighadi, A. Seyeux, Alain Pailleret, S. Nešić, Philippe Marcus

引用次数: 0

Abstract

ToF-SIMS 3D mapping and depth profiling were used to study the anodic iron dissolution mechanisms of mild steel in chloride containing aqueous CO2 environments. The technique detected adsorbed hydroxide and chloride intermediates formed duringthe corrosion process, which is consistent with the proposed multi-path reaction mechanism for anodic iron dissolution reaction. Despite the presence of aqueous carbonic species and their observed effect on the kinetics of iron dissolution, no additional adsorbed intermediates have been detected in aqueous CO2 environments, indicating that carbonic species do not directly participate in the iron dissolution reaction. ToF-SIMS 3D mapping results on characterization of the specimens immersed in a chloride containing solution with and without CO2 suggest that one role of aqueous carbonic species CO2 could be to accelerate the adsorption of chloride ions and formation of chloride intermediates.

查看原文本刊更多论文

有二氧化碳溶解和无二氧化碳溶解的酸性溶液中铁溶解机理的研究--第二部分：ToF-SIMS 三维制图

利用 ToF-SIMS 三维绘图和深度剖析技术研究了低碳钢在含有氯化物的二氧化碳水环境中的阳极溶铁机理。该技术检测到了腐蚀过程中形成的吸附氢氧化物和氯化物中间产物，这与所提出的阳极铁溶解反应的多路径反应机制相一致。尽管存在水溶液中的碳酸物种并观察到其对铁溶解动力学的影响，但在二氧化碳水溶液环境中没有检测到额外的吸附中间产物，这表明碳酸物种并不直接参与铁溶解反应。对浸入含氯化物溶液（含二氧化碳和不含二氧化碳）中的试样进行表征的 ToF-SIMS 3D 绘图结果表明，水溶液中碳酸物种二氧化碳的一个作用可能是加速氯离子的吸附和氯化物中间产物的形成。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

求助全文

约1分钟内获得全文求助全文

来源期刊

Corrosion MATERIALS SCIENCE, MULTIDISCIPLINARY-METALLURGY & METALLURGICAL ENGINEERING

CiteScore

2.80

自引率

12.50%

发文量

审稿时长

3 months

期刊介绍： CORROSION is the premier research journal featuring peer-reviewed technical articles from the world’s top researchers and provides a permanent record of progress in the science and technology of corrosion prevention and control. The scope of the journal includes the latest developments in areas of corrosion metallurgy, mechanisms, predictors, cracking (sulfide stress, stress corrosion, hydrogen-induced), passivation, and CO2 corrosion. 70+ years and over 7,100 peer-reviewed articles with advances in corrosion science and engineering have been published in CORROSION. The journal publishes seven article types – original articles, invited critical reviews, technical notes, corrosion communications fast-tracked for rapid publication, special research topic issues, research letters of yearly annual conference student poster sessions, and scientific investigations of field corrosion processes. CORROSION, the Journal of Science and Engineering, serves as an important communication platform for academics, researchers, technical libraries, and universities. Articles considered for CORROSION should have significant permanent value and should accomplish at least one of the following objectives: • Contribute awareness of corrosion phenomena, • Advance understanding of fundamental process, and/or • Further the knowledge of techniques and practices used to reduce corrosion.