不锈钢热轧板材焊接接头的晶间腐蚀试验
Intergranular Corrosion Susceptibility of Welded Joint of Stainless Steels
摘 要
利用常规方法和电化学方法分别测定了304奥氏体不锈钢和410S铁素体不锈钢热轧板材钨极氩弧焊(TIG)焊接接头的晶间腐蚀倾向.结果表明:采用硫酸+硫酸铜法和双环动电位再活化法(DL-EPR)都能很好地评价304不锈钢焊接接头的晶间腐蚀倾向,且两者吻合较好.由于410S母材的抗蚀性较差,采用硫酸+硫酸铜法无法评价其焊接接头的晶间腐蚀倾向,而双环动电位再活化法可以定量、快速测定其晶间腐蚀敏感性,试验发现410S的热影响区和母材有晶间腐蚀倾向,其中靠近熔合线的热影响区晶间腐蚀最严重.
焊接接头
DL-EPR
晶间腐蚀
stainless steel
welded joint
DL-EPR
intergranular corrosion
Abstract
The tendency to intergranular corrosion (IGC) of the welded joints of 304 and 410S hot rolled stainless steel plates by TIG welding was tested by conventional method and electrochemical method.The results showed that the H2SO4-CuSO4 method and double electrochemical potentiokinetic reactivation ( DL-EPR) were appropriate for evaluating the tendency to IGC,and both were very coincident;Due to the bad erosion resistance of the base material of 410S,its tendency to IGC could not be evaluated by the H2SO4-CuSO4 method,but could be quantitatively and fast tested by EPR.The welded beam,heat-affected zone(HAZ) and base material of 410S had the tendency to IGC,and the IGC of HAZ near fusion-line was most serious.
中图分类号 TG174.3
所属栏目 试验研究
基金项目 甘肃省有色金属新材料重点实验室开放基金(SKL05011)
收稿日期 2008/9/9
修改稿日期 2008/10/24
网络出版日期
作者单位点击查看
联系人作者杨瑞成(yangruic@lut.cn)
备注杨瑞成,教授,博导.
引用该论文: MENG Wei,YANG Rui-cheng,SHU Jun,HU Tian-lei,NIU Shao-rui. Intergranular Corrosion Susceptibility of Welded Joint of Stainless Steels[J]. Corrosion & Protection, 2009, 30(10): 684～687
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参考文献
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【3】Kasparova O V.Peculiarities of intergranular corrosion of silicon containing austenitic stainless steels[J].Prot Metals,2004(5):425-42.
【4】罗辉,赵忠魁,冯立明,等.焊接工艺参数对奥氏体不锈钢焊接接头腐蚀行为的影响[J].热加工工艺,2005,2(6):54-56.
【5】李神速.双回路EPR法测定奥氏体不锈钢的敏化[J].腐蚀科学与防护技术,2000,12(5):288-291.
【6】高中平,陈范才,赵常就.动电位再活化法评价晶间腐蚀敏感性的各种判据[J].四川化工与腐蚀控制,1999,2(3):40-44.
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