用放射性同位素36Cl−对不锈钢腐蚀缝隙中氯化物的可视化和定量评价

IF 7.4 1区材料科学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY

Corrosion Science Pub Date : 2025-06-28 DOI:10.1016/j.corsci.2025.113119

So Aoki , Yosuke Abe , Hiroshi Abe , Yutaka Watanabe , Masahiro Yamamoto

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引用次数: 0

摘要

不锈钢是一种典型的耐腐蚀材料，由于局部腐蚀而受到严重的攻击。特别是，缝隙腐蚀一直是不锈钢使用中的一个问题。在裂缝腐蚀因素中，很难通过实验测量腐蚀缝隙中氯化物含量的空间分布和随时间的定量变化，目前报道较少。在这项研究中，氯化物在腐蚀缝隙中的分布使用36Cl−可视化，36Cl−是氯化物的放射性同位素。根据36Cl -发射β射线的光敏时间与成像板亮度的关系，得到了36Cl -用量的校准曲线。根据标定曲线对腐蚀缝隙中的氯化物含量进行了定量评价。这些结果使讨论氯化物在不锈钢缝隙腐蚀中的行为成为可能。将可视化和定量评价方法应用于裂隙腐蚀试验后将试样置于纯水中的试验，并讨论了氯离子在腐蚀缝隙中的行为。

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Visualisation and quantitative evaluation of chlorides in corroded crevice of stainless steel using radioisotope 36Cl−

Stainless steel, a typical corrosion-resistant material, is subject to severe attack due to localised corrosion. In particular, crevice corrosion has always been a problem in the use of stainless steels. Among the crevice corrosion factors, it is difficult to experimentally measure the spatial distribution and quantitative change over time of the chloride content in the corroded crevice, and there have been few reports so far. In this study, the distribution of chloride in the corroded crevice was visualised using

^{36} {Cl}^{-}

, which is a radioactive isotope of chloride. A calibration curve for the amount of

^{36} {Cl}^{-}

was obtained from the relationship between the time of photosensitivity to

β

-ray emitted by

^{36} {Cl}^{-}

and the luminance of the imaging plate. The chloride content in the corroded crevice was quantitatively evaluated based on the calibration curve. These results made it possible to discuss the behaviour of chloride in crevice corrosion of stainless steel. The visualisation and quantitative evaluation methods were also applied to tests in which specimens were left in pure water after crevice corrosion tests, and the behaviour of chloride in the corroded crevice was discussed.

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来源期刊

Corrosion Science 工程技术-材料科学：综合

CiteScore

13.60

自引率

18.10%

发文量

763

审稿时长

46 days

期刊介绍： Corrosion occurrence and its practical control encompass a vast array of scientific knowledge. Corrosion Science endeavors to serve as the conduit for the exchange of ideas, developments, and research across all facets of this field, encompassing both metallic and non-metallic corrosion. The scope of this international journal is broad and inclusive. Published papers span from highly theoretical inquiries to essentially practical applications, covering diverse areas such as high-temperature oxidation, passivity, anodic oxidation, biochemical corrosion, stress corrosion cracking, and corrosion control mechanisms and methodologies. This journal publishes original papers and critical reviews across the spectrum of pure and applied corrosion, material degradation, and surface science and engineering. It serves as a crucial link connecting metallurgists, materials scientists, and researchers investigating corrosion and degradation phenomena. Join us in advancing knowledge and understanding in the vital field of corrosion science.