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

J Chin Soc Corr Pro

1986, Vol. 6

Issue (2): 137-144 DOI:

Current Issue | Archive | Adv Search

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)

Download:

PDF(820KB)
Export: BibTeX | EndNote (RIS)

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.

Received: 25 April 1986

	Service

	E-mail this article
	Add to citation manager
	E-mail Alert
	RSS
	（）
	Articles by authors

Cite this article:

Lin Haichao and Cao Chunan(Changchun Institute of Applied Chamistry; Academia Sinica). A STUDY OF ELECTROCHEMICAL NOISE DURING PITTING CORROSION OF IRON IN NEUTRAL SOLUTIONS. J Chin Soc Corr Pro, 1986, 6(2): 137-144.

URL:

https://www.jcscp.org/EN/ OR https://www.jcscp.org/EN/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!

No Suggested Reading articles found!

Viewed

Full text

Abstract

Cited

Shared

Discussed