690和800合金在高温高压水中硫致腐蚀失效研究进展

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	690和800合金在高温高压水中硫致腐蚀失效研究进展
其他题名	Research Progress on Sulfur-Induced Corrosion of Alloys 690 and 800 in High Temperature and High Pressure Water
	夏大海 1; 宋诗哲 1; 王俭秋 2; 骆静利 3
	2017
发表期刊	金属学报
ISSN	0412-1961
卷号	53.0 期号:012 页码:1541-1554
摘要	高温高压水中的硫对蒸汽发生器合金的腐蚀是最复杂的腐蚀过程之一。本文从热力学计算和实验方面综述了高温高压水中硫致690和800合金腐蚀的研究进展。热力学计算主要以E-pH图、伏特等效图以及离子分布系数曲线呈现，计算结果表明S的价态以及与金属的相互作用主要受温度、pH以及电位的影响，但热力学计算没有考虑S中间产物的影响作用。腐蚀电化学及表面分析结果表明硫致腐蚀受温度、pH值、S离子种类、Cl－等其他杂质离子、晶粒取向、合金成分以及应力等多因素影响，多因素之间可能存在复杂的交互作用。合金中Cr、Mo和Cu的加入可在一定程度上抑制硫致腐蚀，而Ni含量的增加则使硫致腐蚀敏感性增加。S更易吸附在材料表面缺陷处引起局部优先溶解，晶粒取向按照(111)<(100)<(110)硫致腐蚀敏感性增大。
其他摘要	As nuclear power operates at high temperature and high pressure, corrosion is considered as one of the issues that threaten the safe operation, though corrosion rarely occurs. To fully understand the electrochemical behavior of nuclear key materials and manage the corrosion degradation of these materials in a proactive manner, a great deal of work have been undertaken in tab. Some sulfurrelated specie can cause corrosion degradation of metal materials. Steam generator （SG） is one of the most important components in nuclear power plant, and alloys 800 and 690 are the most frequently used as SG tubing alloys. Sulfur-induced corrosion of SG alloys in high temperature and high pressure water is one of the most complicated processes. In this paper, the research progress regarding to sulfur-induced corrosion of alloys 690 and 800 was reviewed from the aspects of thermodynamic calculations and experimental. Thermodynamic calculations are mainly presented by E-pH diagrams, volt equivalent diagrams and species distribution curves. It is concluded that the valences of sulfur and their interactions with metal is mainly affected by temperature, solution pH and electrode potential. Experimental data indicate that sulfur induced corrosion is determined by temperature, solution pH, sulfur species, and other impurities like chloride ions, grain orientation, alloy compositions and stress etc. These factors can interact in a very complicated way. Generally, increasing temperature and decreasing solution pH would increase the corro- sion degree of SG tubing alloys. Sulfur at the reduced or intermediate oxidation level are more detrimental than complete oxidation level, to the passivity of SG tubing alloys. Chloride ions have a combined ef- fect with thiosulfate on passive film degradation in the case that chloride＇s adsorption is dominant; this combined effect is not remarkable if the chloride＇s adsorption is not dominant. Elements like Cr, Mo and Cu in alloys would weaken sulfur adsorption to some extent and therefore inhibit sulfur-induced corrosion, but increasing Ni content would enhance sulfur-induced corrosion. Both compressive and tensile stress would increase the reactivity of a passive surface of SG tubing. Sulfur would more easily adsorb on the metal surface where it has more defects, resulting in an increased dissolution rate. The crystal ori- entation can enhance the corrosion rate in the order of （111）〈（100）〈（110）.
关键词	蒸汽发生器 690合金 800合金硫代硫酸根还原态硫钝化膜
收录类别	CSCD
语种	中文
CSCD记录号	CSCD:6132886
引用统计	被引频次：7[CSCD] [CSCD记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/152635
专题	中国科学院金属研究所
作者单位	1.天津大学 2.中国科学院核用材料与安全评价重点实验室 3.阿尔伯塔大学
推荐引用方式 GB/T 7714	夏大海,宋诗哲,王俭秋,等. 690和800合金在高温高压水中硫致腐蚀失效研究进展[J]. 金属学报,2017,53.0(012):1541-1554.
APA	夏大海,宋诗哲,王俭秋,&骆静利.(2017).690和800合金在高温高压水中硫致腐蚀失效研究进展.金属学报,53.0(012),1541-1554.
MLA	夏大海,et al."690和800合金在高温高压水中硫致腐蚀失效研究进展".金属学报 53.0.012(2017):1541-1554.