敏化对304L不锈钢在高温NaOH溶液中应力腐蚀开裂的影响
Effect of Sensitization on Stress Corrosion Cracking of 304L Stainless Steel in NaOH Solutions at High Temperatures
摘 要
通过慢应变速率拉伸试验和扫描电镜研究了敏化对304L不锈钢在高温下不同浓度NaOH溶液中应力腐蚀开裂的影响.结果表明:经敏化后该钢在不同温度和浓度NaOH溶液中的抗应力腐蚀开裂性能显著下降,其中温度的影响比浓度更为显著;性能下降的主要原因是敏化后碳化物沿晶界析出,形成了贫铬区.
敏化
应力腐蚀开裂
NaOH溶液
304L stainless steel
sensitization
stress corrosion cracking
NaOH solution
Abstract
Effect of sensitization on stress corrosion cracking(SCC) of 304L stainless steel in NaOH solutions with different concentrations at high temperatures was investigated by using slow strain rate tests(SSRT) and SEM technology.The results show that after sensitization,the resistance of the steel to SCC declined remarkably under the conditions of different temperatures and concentrations in NaOH solution.The effect of temperature was more obvious than that of the concentration.The main reason which resulted in the property reduction was the carbide precipation along the grain boundaries after sensitization and the formation of chromium depleted zone.
中图分类号 TG172.9
所属栏目 材料性能及其应用
基金项目 江苏省“六大人才高峰”资助项目(06-D-035)
收稿日期 2009/2/10
修改稿日期 2009/8/2
网络出版日期
作者单位点击查看
备注姜勇(1974-),男,山东乳山人,讲师,博士研究生.
引用该论文: JIANG Yong,GONG Jian-ming,LI Feng. Effect of Sensitization on Stress Corrosion Cracking of 304L Stainless Steel in NaOH Solutions at High Temperatures[J]. Materials for mechancial engineering, 2010, 34(2): 35～38
姜勇,巩建鸣,李峰. 敏化对304L不锈钢在高温NaOH溶液中应力腐蚀开裂的影响[J]. 机械工程材料, 2010, 34(2): 35～38
被引情况:
【1】李萍,程向梅,李安娜,唐子乔, "304不锈钢敏化程度的超声无损表征",机械工程材料 37, 53-57(2013)
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参考文献
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【7】姜勇,巩建鸣,周荣荣.浓度和温度对316L不锈钢在NaOH溶液中应力腐蚀开裂行为的影响[J].腐蚀与防护,2008,29(12):749-751.
【2】JONES R H.Stress-corrosion cracking[M].Metal Park,OH:ASM,1992:91.
【3】TABODA A,PRANK L.Intergranular corrosion in nuclear system,intergranular corrosion in stainless alloys[M].Philadelphia:ASTM,1978:85.
【4】余存烨.石化设备应力腐蚀破裂环境评价[J].腐蚀与防护,2007,28(1):23-28.
【5】徐婉,张礼敬,孟亦飞,等.PTA装置加氢反应器在碱环境中的应力腐蚀分析及防护[J].化工机械,2006,33(4):248-250.
【6】柳长圣.PTA加氢反应器改造[J].聚酯工业,2006,17(1):30-31.
【7】姜勇,巩建鸣,周荣荣.浓度和温度对316L不锈钢在NaOH溶液中应力腐蚀开裂行为的影响[J].腐蚀与防护,2008,29(12):749-751.
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