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划伤方法研究应力作用下硫代硫酸根对800合金再钝化动力学的影响
Alternative TitleRepassivation Process on Stressed Alloy 800 in Simulated Crevice Chemistry Containing Thiosulfate
祝钰1; 王泽清1; 孙颖昊1; 林芳旭1; 夏大海1; 宋诗哲1; 王俭秋2; 张志明2
2018
Source Publication腐蚀科学与防护技术
ISSN1002-6495
Volume30.0Issue:005Pages:503-507
Abstract采用划伤方法研究应力作用下硫代硫酸根对800合金再钝化动力学的影响机理,采用C形环对试样进行应力加载。结果表明,划伤过程的最大电流与再钝化电流随电极电位的升高而升高,随着电位升高划伤部位的阳极溶解过程加快。与应力加载前对比,试样加载后划伤过程的最大电流与再钝化电流均增加,表明应力使金属的阳极溶解速度变快,同时使再钝化过程变难。硫代硫酸根可与应力协同阻止再钝化过程,这主要是由于硫代硫酸根的吸附与电化学还原成吸附硫,进而加快金属的溶解所致。
Other AbstractThe repassivation kinetics of stressed Alloy 800 in simulated crevice chemistries containing thiosulfate is studied by scratch test, while the stress is exerted by a C-ring sample. Results indicate that, as the potential moves to anodic directions, the maximum current and repassivation current increase, which reveals that the anodic dissolution rate increases. Compared to the unstressed sample, the maximum current and repassivation current of the stressed sample are higher, indicating an increased anodic dissolution rate and a retarded repasivation process. The retard effect of thiosulfate on the repassivation of the alloy may be ascribed to that thiosulfate is adsorbed and then electrochemically reduced to elemental sulfur on the bare metal surface, which subsequently enhance the anodic dissolution.
Keyword800合金 划伤 再钝化 蒸汽发生器 缝隙水化学 应力
Indexed ByCSCD
Language中文
CSCD IDCSCD:6334690
Citation statistics
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/148143
Collection中国科学院金属研究所
Affiliation1.天津大学
2.中国科学院金属研究所
Recommended Citation
GB/T 7714
祝钰,王泽清,孙颖昊,等. 划伤方法研究应力作用下硫代硫酸根对800合金再钝化动力学的影响[J]. 腐蚀科学与防护技术,2018,30.0(005):503-507.
APA 祝钰.,王泽清.,孙颖昊.,林芳旭.,夏大海.,...&张志明.(2018).划伤方法研究应力作用下硫代硫酸根对800合金再钝化动力学的影响.腐蚀科学与防护技术,30.0(005),503-507.
MLA 祝钰,et al."划伤方法研究应力作用下硫代硫酸根对800合金再钝化动力学的影响".腐蚀科学与防护技术 30.0.005(2018):503-507.
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