醋酸浓度和温度对超级13Cr不锈钢电化学腐蚀行为的影响
Influence of HAc Concentration and Temperature on the Electrochemical Corrosion Behavior of Super 13Cr Stainless Steel
摘 要
采用电化学方法，研究了醋酸的加入量及温度对于超级13Cr油管钢在3.5% NaCl（质量分数，下同）溶液中钝化及点蚀行为的影响。结果表明：醋酸的加入引起超级13Cr油管钢开路电位下降，但未显著降低其点蚀电位。不含醋酸时，试样的钝化膜呈n型半导体特性；加入1%和10%的醋酸后，钝化膜呈现n+p型的双极性特征。醋酸会使钝化膜减薄，膜内点缺陷密度增大，从而降低钝化膜的保护作用。溶液中不含醋酸时，升高温度会导致钝化区间变窄，但在含1%醋酸的溶液中，试样的钝化区间宽度随温度升高几乎不变。
电化学
腐蚀
醋酸
钝化膜
super 13Cr stainless steel
electrochemistry
corrosion
acetic acid
passive film
Abstract
Electrochemical techniques were used to investigate the influence of HAc concentration and solution temperature on the passive and pitting corrosion behavior of super 13Cr stainless steel in 3.5% NaCl solution. The results revealed that the addition of HAc lowered the open circuit potential of super 13Cr stainless steel, while did not significantly reduce its critical breakdown potential. In the absence of HAc, the passive film exhibited n-type semiconducting property, whereas changed to n + p type in the presence of HAc. With the increase of HAc concentration, the steady state thickness of the passive film decreased while the concentration of point defects in the passive film increased, which indicated the decline of the protective effect of the film. In the absence of HAc,the width of the passive region decreased with the increase of temperature. However, in the presence of HAc, the width of the passive region kept almost unchanged with the uncrease of temperature.
中图分类号 TG172 DOI 10.11973/fsyfh-201709004
所属栏目 试验研究
基金项目 中国石油天然气集团公司应用基础研究项目（2014A-4214）
收稿日期 2016/2/17
修改稿日期
网络出版日期
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引用该论文: LEI Xiaowei,FU Anqing,FENG Yaorong,ZHANG Jianxun,YIN Chengxian. Influence of HAc Concentration and Temperature on the Electrochemical Corrosion Behavior of Super 13Cr Stainless Steel[J]. Corrosion & Protection, 2017, 38(9): 676
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参考文献
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【4】ZHANG J T,BAI Z Q,ZHAO J,et al. The synthesis and evaluation of N-carbonyl piperazine as a hydrochloric acid corrosion inhibitor for high protective 13Cr steel in an oil field[J]. Petroleum Science and Technology,2012,30(17):1851-1861.
【5】ZHU S D,WEI J F,CAI R,et al. Corrosion failure analysis of high strength grade super 13Cr-110 tubing string[J]. Engineering Failure Analysis,2011,18(8):2222-2231.
【6】雷晓维,张娟涛,白真权,等. 喹啉季铵盐酸化缓蚀剂对超级13Cr不锈钢电化学行为的影响[J]. 腐蚀科学与防护技术,2015,27(4):358-362.
【7】吕祥鸿,谢俊峰,毛学强,等. 超级13Cr马氏体不锈钢在鲜酸中的腐蚀行为[J]. 材料科学与工程学报,2014,32(3):318-323.
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【9】MACDONALD D D. Theoretical investigation of the evolution of the passive state on alloy 22 in acidified,saturated brine under open circuit conditions[J]. Electrochimica Acta,2011,56(21):7411-7420.
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【11】LI D G,WANG J D,CHEN D R,et al. Influences of pH value, temperature, chloride ions and sulfide ions on the corrosion behaviors of 316L stainless steel in the simulated cathodic environment of proton exchange membrane fuel cell[J]. Journal of Power Sources,2014,272:448-456.
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【15】SHARIFI-ASL S,MAO F,LU P,et al. Exploration of the effect of chloride ion concentration and temperature on pitting corrosion of carbon steel in saturated Ca(OH)2 solution[J]. Corrosion Science,2015,98:708-715.
【16】程学群,李晓刚,杜翠薇,等. 316L不锈钢在醋酸溶液中的钝化膜电化学性质[J]. 北京科技大学学报,2007,29(9):911-915.
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