碳钢孔蚀期间的电流波动特征

中国腐蚀与防护学报

2001, Vol. 21

Issue (6): 357-362

研究报告

本期目录 | 过刊浏览

碳钢孔蚀期间的电流波动特征

姜涛;左禹;熊金平

北京化工大学材料科学与工程学院

THE SUTYD ON CURRENT FLUCTUATIONS DURINGPITTING CORROSION OF MILD STEEL

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北京化工大学材料科学与工程学院

全文: PDF(167 KB)

摘要: 用电化学方法研究了碳钢在含Cl-的磷酸盐+硼酸盐缓冲溶液中，在孔蚀电位附近恒电位条件下电流波动的特征.在孔蚀电位Eb及Eb以上，恒电位和动电位极化时都观察到电流波动现象，在本底电流并未连续增大的情况下多次电流波动后可观察到蚀孔，表明在此体系中围绕表面的孔蚀活性点可能会发生反复的亚稳态局部溶解.恒电位下随时间延长电流波动频率降低，电流波动峰值服从正态分布；电位升高导致本底电流和电流波动峰值电流均增大，但对波动频率无明显影响.电流波动峰形状为快速上升，缓慢下降，即孔蚀活性点快速溶解，慢速再钝化，根据电流下降部分计算的再钝化速率服从指数衰减形式.

关键词 ：碳钢, 孔蚀, 电流波动

Abstract：The characteristics of current fluctuations on carb on steel in phosphate+borate buffer solutions containing chloride were studied u sing electrochemical methods.Current fluctuations were recorded at pitting poten tial Eb or above Eb during both potentiostatic and potentiodynamic polarization. Although the background current did not show continuous increase,pits were obser ved after the test,which may be the result of repeated metastable dissolution ar ound the active sites on the surface.At constant potential,the fluctuation frequ ency decreased with time,and the peak currents follow normal distribution.Increa sed potential led to higher peak currents,but exerted no influence on the fluctu ation frequency.All the current peaks have the type of quick increase and slow decay in exponential forms.The mechanism of pitting of mild steel in the system was discussed.

Key words： mild steel pitting current fluctuation

收稿日期: 2000-06-19

ZTFLH:

TG174.41

通讯作者: 姜涛

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引用本文:

姜涛; 左禹; 熊金平 . 碳钢孔蚀期间的电流波动特征[J]. 中国腐蚀与防护学报, 2001, 21(6): 357-362 .

链接本文:

https://www.jcscp.org/CN/Y2001/V21/I6/357

[1] Williams D E, Westcott C, Fleischmann M. Stochastic models of pitting corrosion of stainless steels[J]. J. Electrochem. Soc.,
1985,132:1796
[2] Frankel G S,Stockert L, Hunkeler F.Boehni H.Metastable pitting of stainless steel[J]. Corrosion, 1987,43:429
[3] Pistorius P C, Burstein G T. Growth of corrosion pits on stainless steel in chloride solution containing dilute sulphate[J]. Corros.
Sci., 1992,33:1885
[4] Pistorius P C, Burstein G T. Aspects of the effects of electrolyte composition on the occurrence of metastable pitting on stainless
steel[J]. Corros. Sci., 1994,36:525
[5] Cheng Y F, Wilmott M, Luo J L. Transition criterion of metastable pitting towards stability for carbon steel in chloride solutions

[J].Corros.Sci.,1999,41:1245
[6] Hernandez M A, Rodriguez F J.Genesca J, et al.Oscillation and chaos in pitting corrosion of steel[J].Corrosion/99,1999,197
[7] Tsuru T, Sakairi M. Statistical analysis on the current fluctuations during pit embryos formation on stainless steel[J]. Boshoku
Gijutsu, 1990,39:355
(水流澈,坂入正敏．不锈钢孔蚀萌生时的电流彼动及其统计性质[J]．防蚀技术,1990,39:355)
[8] Gainer L J, Wallwork G R.The effect of nonmetallic inclusions on the pitting of mild steel[J].Corrosion, 1979,35:4358

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