钝化预处理对316 L不锈钢在漂液中电化学腐蚀性能的影响

doi:10.3969/j.jssn.1000-2006.2011.06.019

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南京林业大学学报（自然科学版） ›› 2011, Vol. 35 ›› Issue (06): 91-95.doi: 10.3969/j.jssn.1000-2006.2011.06.019

钝化预处理对316 L不锈钢在漂液中电化学腐蚀性能的影响

王淑梅，戴红旗*，刘阳，周毅

南京林业大学,江苏省制浆造纸科学与技术重点实验室，江苏南京210037

出版日期:2011-11-28 发布日期:2011-11-28
基金资助:
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。Email:daihq@njfu.com.cn。

Effect of passivation pretreatment on electrochemical corrosion of 316 L stainless steel in bleaching liquid

WANG Shumei,DAI Hongqi*,LIU Yang,ZHOU Yi

Jiangsu Provincial Key Laboratory of Pulp and Paper Science and Technology, Nanjing Forestry University, Nanjing, 210037，China

Online:2011-11-28 Published:2011-11-28

摘要/Abstract

摘要： 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ClO2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ClO2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ClO2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 % H2SO4+20 g/L KNO3 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 ΔE of 316 L stainless steel could be up to 773 mV in the media of 25 ℃, 30 % HNO3 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.

中图分类号:

GT174

王淑梅,戴红旗,刘阳,等. 钝化预处理对316 L不锈钢在漂液中电化学腐蚀性能的影响[J]. 南京林业大学学报（自然科学版）, 2011, 35(06): 91-95.

WANG Shumei,DAI Hongqi*,LIU Yang,ZHOU Yi. Effect of passivation pretreatment on electrochemical corrosion of 316 L stainless steel in bleaching liquid[J].Journal of Nanjing Forestry University (Natural Science Edition), 2011, 35(06): 91-95.DOI: 10.3969/j.jssn.1000-2006.2011.06.019.

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钝化预处理对316 L不锈钢在漂液中电化学腐蚀性能的影响

Effect of passivation pretreatment on electrochemical corrosion of 316 L stainless steel in bleaching liquid

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