采用电化学测试、SEM分析等方法，研究了316 L不锈钢在质量分数为30 %的浓硝酸溶液及98 %硫酸+20 g/L硝酸钾混合液两种钝化剂预处理后的特性，以及在ClO2漂液中的电化学抗腐蚀性能。结果表明，316 L不锈钢在25 ℃、30 %硝酸介质中处理30 min时抗点蚀能力ΔE可达到773 mV，钝化效果较好。EIS图谱表明：316 L不锈钢在ClO2漂液中具有双容抗弧特征，〖JP2〗钝化处理容抗弧半径较未钝化的增大，处理后的316 L不锈钢在60 ℃出现了Warburg阻抗；钝化膜的外层电阻和内层电阻均比未钝化的大。经钝化处理后的316 L不锈钢在ClO2漂液中的受腐蚀速率较未钝化的降低近一半，与钛材相比耐蚀性较差，但能在一定条件下起到减缓腐蚀的作用。
Abstract
The characteristics of 316 L stainless steel which was pretreated under 30 % (mass fraction) of concentrated nitric acid and 98 % H2SO4+20 g/L KNO3 mixture respectively and the electrochemical corrosion of 316 L stainless steel in chlorine dioxide bleaching liquid were investigated by electrochemical testing and SEM analysis. From the results it showed that the pitting corrosion resistance ΔE of 316 L stainless steel could be up to 773 mV in the media of 25 ℃, 30 % HNO3 for 30 minutes. EIS spectra showed that 316 L stainless steel in chlorine dioxide bleaching liquid had double capacitive reactance arcs characteristics; the radius of capacitance reactance arc increased than those without passivation; the treated 316 L stainless steel at 60 ℃ appeared Warburg impedance; the outer and inner resistances of the passive film was larger than those without passivation. The corrosion rate of 316 L stainless steel by passivation in chlorine dioxide bleaching liquid lowered than the untreated nearly half, but the corrosion resistance is poor compared with titanium, and it can slow corrosion under certain conditions.
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参考文献
[1]罗巨生.二氧化氯的制备方法及我国用于纸浆漂白的现状[J].纸和造纸,2007,26（7）：48-50.
[2]宣征南,陈克复.双相不锈钢SAF22O5的性能及其应用前景[J].中华纸业,2002,23（9）：43-45.
[3]樊军.漂白腐蚀及防腐材料[J].纸和造纸,1994（3）:10.
[4]冯拉俊.制浆造纸设备腐蚀与防护[M] .北京：化学工业出版社,2003.
[5]巫云龙.化工腐蚀与防护[M].石家庄：河北科学技术出版社,1994.
[6]夏浩,周栋,丁毅,等.304不锈钢环保型酸洗钝化工艺及其性能研究[J].表面技术,2009,38（4）：47-49.
[7]丁宝峰,吴荫顺,汪轩义，等.316 L不锈钢无铬化钝化工艺研究[J].腐蚀与防护，2001，22（12）：520-521.
[8]Wallinder D, Pana J, Leygraf C， et al. ESI and XPS study of surface modification of 316 LVM stainless steel after passivation[J].Corrosion Science,1999(41):275-289.
[9]王凤丽,吴荫顺,张峥嵘.316 L不锈钢钝化工艺的电化学研究[R].中国腐蚀与防护学会成立20周年暨99学术年会, 1999.
[10]王成,江峰,王福会. 304 不锈钢在硝酸盐及硫酸溶液中的钝化[J].腐蚀科学与防护技术,2003,15（6）：334-336.[11石淑兰,何福望.制浆造纸分析与检测[M].北京：中国轻工业出版社,2006.
[12]Hinton B R W, Ryan N E, Trathen P N. The inhibition of corrosion and stress corrosion in high strength aluminum alloy by surfaceactive agents[C]//Proc.9th Int Congress Met Corrosion.Toronto:NRCC Publication,1984,4:144.
[13]魏宝明.金属腐蚀理论及应用[M].北京：化学工业出版社,1984.
[14]詹怀宇.制浆原理与工程[M].北京：中国轻工业出版社,2009.
[15]Bastidas J M,Lòpez M F,Gutiérrez A,et al.Chemical analysis of passive films on type AISI 304 stainless steel using soft Xray absorption spectroscopy[J].Corros Sci,1998,40:43-438.
[16]CarmezimaM J,Simōesb A M,Montemorb M F,et al.Capacitance behavior of passive films on ferritic and austenitic stainless steel[J].Corros Sci,2005,47:581-591.
[17]Prez F J,Gutierrezb A A,Lpez M F,et al.Surface modification of ionimplantcd AISI 304 stainless steel after oxidation process:Xray absorption spectroscopy analysis[J].Thin Solid Films,2002,415:258-265.
[18]张胜寒,檀玉,梁可心.电化学阻抗谱法对304不锈钢孔蚀生长和再钝化阶段的原位研究[J].中国腐蚀与防护学报,2011,31（2）：130-134.
基金
收稿日期：2011-07-12修回日期：2011-10-21基金项目：江苏省制浆造纸科学与技术重点实验室开放基金项目（200921）作者简介：王淑梅(1973—)，讲师，博士生。*戴红旗（通信作者），教授。Email:daihq@njfu.com.cn。
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