不同氧含量高温水中低合金钢/不锈钢堆焊层的氧化膜特性
Characteristics of Oxide Films on Low Alloy Steel/Stainless Steel Weld in High Temperature Water with Different Oxygen Content
摘 要
研究了在含氧和除氧高温水中合金钢（A508Ⅲ）/不锈钢堆焊层（309L/308L）表面氧化膜的特性。结果表明：在含氧高温水中A508Ⅲ钢表面腐蚀产物主要是γ-Fe2O3，在除氧高温水中其表面腐蚀产物主要为Fe3O4；除氧高温水中309L/308L堆焊层表面尖晶石型氧化物的颗粒比含氧高温水中的大且密集，降低高温水中氧含量有利于形成尖晶石型氧化物，且309L比308L表面氧化物颗粒更多且更大；在含氧高温水中或除氧高温水中浸泡后，309L表面均出现点蚀，而308L表面均未发现明显的点蚀，309L表面夹杂物在高温水中的优先溶解是形成点蚀的重要原因。
压水堆核电站
高温水
腐蚀
氧化膜
low alloy steel/stainless steel weld
pressurized water reactor power plant
high temperature water
corrosion
oxide film
Abstract
The characteristics of oxide films formed on low alloy steel/stainless steel weld in oxygen-containing and deaerated simulated pressurized primary water at 290℃ were investigated. The results showed that the main corrosion product formed on the surface of A508Ⅲ low alloy steel in oxygen-containing high temperature water was γ-Fe2O3, while the surface film was mainly composed of Fe3O4 in deaerated high temperature water. The spinel oxide particles on 309L/308L cladding surface in deaerated high temperature water were larger and more extensive than those in oxygen-containing water. Reducing the oxygen content in high temperature water favored the formation of spinel oxide particles that were more extensive and larger on 309L surface than those on 308L surface. In oxygen-containing or deaerated water, pitting appeared on the surface of 309L, while the surface of 308L had no significant pitting. The preferential dissolution of inclusions of 309L in high temperature water was thought to be the main cause of pitting.
中图分类号 TG174 DOI 10.11973/fsyfh-201803001
所属栏目 试验研究
基金项目 国家自然科学基金（51771107）；上海市经济信息委员会项目（221715003）；上海市浦江人才计划（12PJ1403600）
收稿日期 2016/9/2
修改稿日期
网络出版日期
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引用该论文: XIONG Qi,LI Hongjuan,LÜ,Zhanpeng,PENG Hao,CHEN Junjie,RU Xiangkun. Characteristics of Oxide Films on Low Alloy Steel/Stainless Steel Weld in High Temperature Water with Different Oxygen Content[J]. Corrosion & Protection, 2018, 39(3): 167
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参考文献
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【3】LI G F,CONGLETON J. Stress corrosion cracking of a low alloy steel to stainless steel transition weld in PWR primary waters at 292℃[J]. Corrosion Science,2000:1005-1021.
【4】肖茜,吕战鹏,陈俊劼,等. A508Ⅲ低合金钢在不同浓度硼酸溶液中的腐蚀与电化学行为[J]. 腐蚀与防护,2015,36(3):294-299.
【5】XIAO Q,LÜ Z P,CHEN J,et al. The effects of temperature and aeration on the corrosion of A508Ⅲ low alloy steel in boric acid solutions at 25-95℃[J]. Nuclear Materials,2016,480:88-99.
【6】高欣,吴欣强,关辉,等. 高温高压水环境中腐蚀产物膜的研究现状[J]. 腐蚀科学与防护技术,2007,27(2):110-113.
【7】WU X Q,HAN E,KE H,et al. Effects of loading factors on environmental fatigue behavior of low-alloy pressure vessel steels in simulated BWR water[J]. Nuclear Engineering and Design,2007,237:1452.
【8】HANG D,LÜ Z P,RU X K,et al. Properties of oxide films formed on 316L SS and model alloys with modified Ni, Cr and Si content in high temperature water[J]. Corrosion Science,2016,106:157-171.
【9】杨晓梅. 钢大气腐蚀锈层的激光拉曼光谱研究[J]. 光散射学报,2007,19(2):134-137.
【10】OBLONSKY L J,DEVINE M. A surface enhanced Raman spectroscopic study of the passive films formed in borate buffer on iron, nickel, chromium and stainless steel[J]. Corrosion Science,1995,37(1):17-41.
【11】KIM J,CHOI K J,BAHN C B,et al. In situ Raman spectroscopic analysis of surface oxide films on Ni-base alloy/low alloy steel dissimilar metal weld interfaces in high-temperature water[J]. Journal of Nuclear Materials,2014:181-187.
【12】SCISSE L,LAFFONT B,TANGUY,et al. Effect of surface preparation on the corrosion of austenitic stainless steel 304L in high temperature steam and simulated PWR primary water[J]. Corrosion Science,2012,56:209-216.
【13】杨熙珍,杨武. 金属腐蚀电化学热力学电位-pH图及其应用[M]. 北京:化学工业出版社,1991.
【14】WARREN B. Corrosion in nuclear engineering[M]. Beijing:Atomic Energy Publishing Company,1977.
【15】徐松,吴欣强,韩恩厚,等. 硫和溶解氧含量对低合金钢高温高压水腐蚀疲劳性能的影响[J]. 腐蚀与防护,2010,31(5):825-828.
【16】BEVERSKOG B,PUIGDOMENECH I. Revised pourbaix diagrams for iron at 25-300℃[J]. Corrosion Science,1996,38:2121-2135.
【17】WEN J K,WU X Q,HAN H. Influence of dissolved oxygen concentration on the oxide film formed on 304 stainless steel in high temperature water[J]. Corrosion Science,2012,63:259-266.
【18】TAKUMI T,KATSUHIKO F,KOJI A. Microstructural characterization of SCC crack tip and oxide filmfor SUS 316 stainless steel in simulated PWR primary water at 320℃[J]. Journal of Unclear Science and Technology,2005,42(2):225-232.
【19】郭跃岭,韩恩厚,王俭秋. 锻造态316LN不锈钢在高温高压水中的短期氧化行为[J]. 材料研究学报,2015,29(6):401-409.
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