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| 430铁素体不锈钢晶间腐蚀敏感性评测方法及影响因素 | |
| 引用本文： | 邵泽斌,陈海涛,郎宇平,朱心昆.430铁素体不锈钢晶间腐蚀敏感性评测方法及影响因素[J].特殊钢,2012,33(5):57-60. |
| 作者姓名： | 邵泽斌 陈海涛 郎宇平 朱心昆 |
| 作者单位： | 1. 昆明理工大学材料科学与工程学院,昆明650093;钢铁研究总院结构材料研究所,北京100081 2. 钢铁研究总院结构材料研究所,北京,100081 3. 昆明理工大学材料科学与工程学院,昆明,650093 |
| 基金项目： | 国家科技支撑计划资助(2007BAE51B01) |
| 摘 要： | 采用双环-电化学(DL-EPR)法评价了热轧和退火430铁素体不锈钢(/％:0.038C、16.83Cr)的晶间腐蚀敏感性.确定了一种适合的试验参数,试验溶液为0.05 mol/L H2SO4+0.001 mol/L KSCN+ 0.01 mo]/LNa2SO4,扫描速率为正扫5.0 mV/s,反扫1.67 mV/s,当Ra值(反扫电流Ir/正扫电流Ia)越高,晶间腐蚀敏感性越严重.试验结果表明,热轧后的430铁素体不锈钢存在明显的晶间腐蚀敏感性,空冷试样的Ra值比水冷的高;经过750 ～850℃10 min退火处理能够有效减轻和消除热轧430铁素体不锈钢晶间腐蚀敏感性. |
| 关 键 词： | 双环-电化学(DI-EPR)法 晶间腐蚀 铁素体不锈钢 |
Evaluation Method and Effective Factor on Intergranular Corrosion Susceptibility of 430 Ferrite Stainless Steel |
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| Shao Zebin , Chen Haitao , Lang Yupin , Zhu Xinkun.Evaluation Method and Effective Factor on Intergranular Corrosion Susceptibility of 430 Ferrite Stainless Steel[J].Special Steel,2012,33(5):57-60. | |
| Authors: | Shao Zebin Chen Haitao Lang Yupin Zhu Xinkun |
| Affiliation: | 1 (1 Faculty of Materials Science and Engineering,Kunming University of Science and Technology,Kunming 650093; 2 Institute for Structure Materials,Central Iron and Steel Research Institute,Beijing 100081) |
| Abstract: | A double loop-electrochemical potentiokinetic reactivation（DL-EPR） method is used to evaluate the intergranular corrosion（IGC） susceptibility of hot rolled and annealed 430 ferrite stainless steel（0.038%C,16.83%Cr）.A suitable test parameter- in test solution 0.05 mol/L H2SO4 +0.001 mol/L KSCN +0.10 mol/L Na2SO4 with anodic potential scanning rate 5.0 mV/s and reverse potential scanning rate 1.67 mV/s is determined,and the more large the value Ra （reverse scanning current Ir / anodic scanning current Ia） the more serious the intergranular corrosion susceptibility of steel.Test results show that the hot rolled 430 ferritic stainless steel has obvious intergranular corrosion susceptibility and the Ra value of the sample air-cooled after rolling is larger than that of the sample water-cooled after rolling;with annealed treatment at 750～850℃for 10 min the intergranular corrosion susceptibility of hot rolled 430 ferrite stainless steel is effectively reduced and eliminated. |
| Keywords: | DL-EPR Method Intergranular Corrosion Ferrite Stainless Steel |
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