纳米化304不锈钢在硫酸溶液中的腐蚀行为
Corrosion Behavior of NC-304 Stainless Steel Subjected to SMAT in H2SO4 Solution
摘 要
采用表面机械研磨(Surface Mechanical Attrition Treatment,SMAT)在304不锈钢表面制备出纳米晶层(平均晶粒尺寸20 nm).采用腐蚀失重试验和极化曲线测试等方法比较了粗晶(Coarse-grained,CG)和纳米晶(Nano-crystallized,NC)304不锈钢在室温及80 ℃条件下5%(质量分数)硫酸溶液中的耐蚀性,采用透射电镜(TEM)观察表面纳米化后的微观结构,并利用扫描电镜(SEM)分析了腐蚀行为和微观结构的关系.失重试验结果表明,在两种温度条件下的稀硫酸溶液中,纳米晶结构的304不锈钢耐腐蚀性能明显变差,腐蚀特征以沿晶破坏为主,局部显示出均匀腐蚀形态.电化学测试结果表明,纳米化后的304不锈钢具有更低的自腐蚀电位和更高的自腐蚀电流密度.
不锈钢
纳米晶化
腐蚀
surface mechanical attrition treatment (SMAT)
stainless steel
nano-crystallized (NC)
corrosion
Abstract
304 stainless steel was subjected to surface mechanical attrition treatment (SMAT) and the average grain size of the as-treated surface was about 20 nm.Weight loss tests and electrochemical measurements were used to compare the corrosion behavior of coarse-grained (CG) and nano-crystallized (NC) 304 SS in 5% (mass/%) H2SO4 at 80 ℃ and room temperature (RT).TEM and SEM were used to analyze the relationship between the microstructure and corrosion properties.Weight loss test suggests that NC-304 SS obviously deteriorated after surface nano-crystallization and main corrosive feature was inter granular corrosion,accompanied by local homogeneous corrosion.The lower self-corrosive potential and larger self-corrosion current density of NC-304 SS in the polarization curves approve the corrosive rate evaluating result.
中图分类号 TG142.71
所属栏目 试验研究
基金项目 上海市教育委员会上海高校知识服务平台建设项目(ZF1225)
收稿日期 2014/10/22
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备注王晓梅(1978-),讲师,博士研究生,从事纳米金属材料研究.
引用该论文: WANG Xiao-mei. Corrosion Behavior of NC-304 Stainless Steel Subjected to SMAT in H2SO4 Solution[J]. Corrosion & Protection, 2015, 36(5): 465
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【3】LUO K H,SHEK C H,LAI J K L.Recent developments in stainless steels[J].Materials Science and Engineering,2009,65:39-104.
【4】MILAD M,ZREIBA N,ELHALOUANI F,et al.The effect of cold work on structure and properties of AISI 304 stainless steel[J].J Mater Process Technol,2008,203:80-85.
【5】徐明舟,王立军,王建军,等.18% Cr-12% Mn-0.55% N高氮奥氏体不锈钢低温性能与组织稳定性[J].东北大学学报:自然科学版,2010,31(1):47-50.
【6】QU S,HUANG C X,GAO Y L,et al.Tensile and compressive properties of AISI 304L stainless steel subjected to equal channel angular pressing[J].Mate Sci Eng A,2008,475:207-216.
【7】CHEN X H,LU J,LU L,et al.Tensile properties of a nanocrystalline316L austenitic stainless steel[J].Scripta Materialia,2005,52:1039-1044.
【8】高永亮,杨钢,王立民,等.等通道热挤压变形制备奥氏体不锈钢纳米级组织[J].钢铁研究学报,2006,18(10):41-44.
【9】郑立静,陈昌麒,周铁涛,等.ECAP细晶机制及对纯铝显微组织和力学性能的影响[J].稀有金属材料与工程,2004,33(12):1325-1328.
【10】SERGUEEVA A V,STOLYAROV V V,VALIEV R Z,et al.Advanced mechanical properties of pure titanium with ultrafine grained structure[J].Scripta Materialia,2001,45:747-752.
【11】WANG Y B,LIAO X Z,ZHAO Y H,et al.The role of stacking faults and twin boundaries in grain refinement of a Cu-Zn alloy processed by high-pressure torsion[J].Materials Science and Engineering A,2010,527:4959-4966.
【12】ROLAND T,RETRAINT D,LU K.Fatigue life improvement through surface nanostructuring of stainless steel by means of surface mechanical attrition treatment[J].Scripta Materialia,2006,54:1949-1954.
【13】ZHAO Y H,SHENG H W,LU K,et al.Microstructure evolution and thermal properties in nanocrystalline Fe during mechanical attrition[J].Acta Mater,2001,49:365-375.
【14】陈爱英,陈麒忠,张俊宝,等.层状纳米结构AISI 304 SS板的力学性能[J].上海应用技术学院学报:自然科学版,2012,12(3):171-174.
【15】HUANG C X,YANG G,GAO Y L,et al.Influence of processing temperature on the microstructures and tensile properties of 304L stainless steel by ECAP[J].Materials Science and Engineering A,2008(485):643-650.
【16】BALUSAMY T,SATENDRA KUMAR,SANKARA NARAYANAN T S N.Effect of surface nanocrystallization on the corrosion behavior of AISI 409 stainless steel[J].Corrosion Science,2010(52):3826-3834.
【17】YE W,LI Y,WANG F H.The improvement of the corrosion resistance of 309 stainless steel in the transpassive region by nano-crystallization[J].Electrochimica Acta,2009,54:1339-1349.
【18】石继红,武保林,刘 刚.316L不锈钢表面纳米化后腐蚀性能研究[J].材料工程,2005(10):42-46.
【19】林文松,周细应,王思珺,等.镍/碳纳米管复合镀层在NaCl和H2SO4溶液中的腐蚀特性[J].材料科学与工程学报,2005,23(2):218-222.
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