表面喷丸对800合金点蚀性能影响
Effect of Surface Shot Peening on Pitting Corrosion Resistance of Alloy 800
摘 要
采用电化学循环极化曲线、FeCl3溶液浸泡以及扫描电子显微镜(SEM)等方法, 研究了表面喷丸对国产800合金管抗点腐蚀性能的影响。结果表明, 喷丸处理后800合金管的耐点腐蚀性能降低。对电化学极化试验后的试样进行SEM观察, 未喷丸管点蚀坑面积大, 且较浅; 而喷丸处理后800合金管点蚀坑面积小而深。相对于未喷丸管, 喷丸处理后材料表面晶粒的细化、喷丸过程中所带来的残余应力及表面变粗糙可能是800合金喷丸管耐点蚀性能降低的原因。
800合金
喷丸处理
点蚀
electrochemical cyclic polarization
alloy 800
shot peening
pitting corrosion
Abstract
The effect of surface shot peening on pitting corrosion resistance of Alloy 800 tube was investigated using electrochemical cyclic polarization curve, FeCl3 immersion and SEM observation. The results showed that the pitting corrosion resistance of the shot peened Alloy 800 tube was lower than that of the un-shot peened Alloy 800 tube. SEM observation found that the pits of Alloy 800 tube before shot peening were bigger in area and shallower in depth than those of Alloy 800 tube after shot peening. The decreased resistance to pitting corrosion of the shot peened Alloy 800 tube was mainly attributed to the reduction of the surface grain size, the residual stress and the increased surface roughness caused by shot peening technology.
中图分类号 TG174 TB37
所属栏目 试验研究
基金项目 国家自然科学基金(50871130)
收稿日期 2011/12/12
修改稿日期
网络出版日期
作者单位点击查看
备注唐辉, 硕士研究生,
引用该论文: TANG Hui,ZHANG Le-fu,SUN Hua. Effect of Surface Shot Peening on Pitting Corrosion Resistance of Alloy 800[J]. Corrosion & Protection, 2012, 33(10): 853
被引情况:
【1】龚嶷,徐雪莲, "压水堆核电厂蒸汽发生器老化机理及其影响因素",腐蚀与防护 35, 163-168(2014)
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参考文献
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【3】朱小明, 黄红波, 林俊, 等. 用XPS分析喷丸处理后800合金在强碱溶液中的腐蚀产物[J]. 中国腐蚀与防护学报, 2004, 24(4):213-217.
【4】黄发, 王剑秋, 韩恩厚, 等. 硼酸缓冲溶液中Cl-浓度和温度对690合金腐蚀行为的影响[J]. 金属学报, 2011, 47(7):809-815.
【5】李雪莉, 李瑛, 王福会, 等. USSP表面纳米化Fe-20Cr合金的腐蚀性能及机制研究[J]. 中国腐蚀与防护学报, 2011, 22(6):326-330.
【6】Azar V, Hashemi B. The effect of shot peening on fatigue and corrosion behavior of 316L stainless steel in Ringer′s solution[J]. Surface Coatings Technology, 2010, 204:3546-3551.
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