孔蚀过程中的电化学噪声研究

中国腐蚀与防护学报

1986, Vol. 6

Issue (2): 137-144

研究报告

本期目录 | 过刊浏览

孔蚀过程中的电化学噪声研究

林海潮;曹楚南

中国科学院长春应用化学研究所;中国科学院长春应用化学研究所

A STUDY OF ELECTROCHEMICAL NOISE DURING PITTING CORROSION OF IRON IN NEUTRAL SOLUTIONS

Lin Haichao and Cao Chunan(Changchun Institute of Applied Chamistry; Academia Sinica)

全文: PDF(820 KB)

摘要: 研究了纯铁在Cl~-与K_2Cr_2Or、C_6H_5COONa、硼酸加硼砂和NaNO_2共存的四种溶液体系中发生孔蚀过程中的电化学噪声。在各溶液中Cl~-浓度不足以引起孔蚀时,检查不到噪声信号。在Cl~-浓度高到足以引起孔蚀时,试样浸入溶液后经过一段诱导期,噪声突然出现。相应一个噪声信号波,有一个腐蚀孔出现,在临界Cl~-浓度下有时虽然也会出现噪声信号,但并未形成可见孔而只是表面变晦暗。所有噪声都是低频1/f噪声。作者认为,这种噪声与半导体器件的“闪烁噪声”相同。

Abstract：The electrochemical noise during pitting corrosion of iron in solutions of K_2Cr_2O_7, Na-benzoete, boric acid+borax and NaNO_2 with various concentrations of Cl~- -ion at 30℃ was studide using a FFT analyzer.No electrochemical noise can be detected when the concentration of C1~- -ion is below the critical concentration to induce pitting corrosion for each solution. As the concentration of Cl~- -ion is high enough to cause pitting corrosion, electrochemical noise arises sooner or later after the iron coupon is dipped into solution, and pits are formed correspondingly in most eases. In all cases the electrochemical noise observed is 1/f noise in low frequency range, and the power of noise increases with Cl~- concentration roughly lineraly in each solution. It is considered that the noise observed is similar to the flicker noise in semiconductors and is caused by the increase of aaodic current through the passive film under the action of Cl~- -ion.

收稿日期: 1986-04-25

	服务

	把本文推荐给朋友
	加入引用管理器
	E-mail Alert
	RSS
	作者相关文章
	林海潮
	曹楚南
44.8K

引用本文:

林海潮;曹楚南. 孔蚀过程中的电化学噪声研究[J]. 中国腐蚀与防护学报, 1986, 6(2): 137-144.
. A STUDY OF ELECTROCHEMICAL NOISE DURING PITTING CORROSION OF IRON IN NEUTRAL SOLUTIONS. J Chin Soc Corr Pro, 1986, 6(2): 137-144.

链接本文:

https://www.jcscp.org/CN/ 或 https://www.jcscp.org/CN/Y1986/V6/I2/137

[1] #12
[2] #12
[3] Tyagai, V.A., Electrochimica Acta., 16, 1647(1971)
[4] Barker, G.C., J.Electroanal.Chem., 21, 127(1969)
[5] Barker, G.C., ibid., 82, 145(1977)
[6] Blanc, G., Epelboin, I., Gabrielli, C., Keddam, M., ibid., 75, 97(1977)
[7] Fleischmann, M., Labram, M., Gabrielli, C., Statar, A., Surface Science, 101 (1～3) , 583(1980)
[8] Bertocci, U., Proco 7th Intern.Congr. on Metallic Corrosion, 2010(1979)
[9] Bertocci, U., Kruger, J., Surface Science, 101(1～3) , 608 (1980)
[10] Bettocci, U., J,Electrochem, Soc,, 127(9) , 1931(1980)
[11] Hladky, K., Dawson, J,L., Corrosion Science, 21(4) , 317(1981)
[12] Hladky, K., Dawson, I,L., ibid., 22(3) , 231(1982)
[13] 罔本,西山贞雄等,防蚀技术,23,439(1974)
[14] 西山贞雄,罔本等,防蚀技术,23,445(1974)
[15] Tachibana, K., Okamoto, G., Reviews on Coatings and Corrosion, 4(3) , 229 (1981)
[16] 曹楚南,化工机械,(3) ,49(1981)

No related articles found!

Viewed

Full text

Abstract

Cited

Shared

Discussed