The synergistic inhibition of aluminium bronze corrosion by 4-phenyl semicarbazide hydrochloride (PSC) and the iodide ion in HCl of pH (1·8-2) at 60°C has been assessed by polarisation studies, Tafel plots, X-ray photoelectron spectroscopy and Auger electron spectroscopy. The addition of 0·01M KI to 0·01M PSC improved the inhibition efficiency from 86 to 94% owing to the formation of a CuI-PSC complex which is more compact, protective and hard than the film formed in the absence of iodide. The inner layer of this protective film contains a small amount of aluminium oxide, which increases the protective nature of the film and retards the dissolution of the underlying aluminium bronze.
Get full access to this article
View all access options for this article.
References
1.
FumS.: Bosei Kann, 1979, 23, 29.
2.
LewisG.: Br. Corros. J., 1981, 16, 169.
3.
SanadS. H., ABBASH., ISMAILA. A., and EL-SOBKIK. M.: Surf. Technol., 1985, 25, 39.
4.
HashemiT. and HOGARTHC. A.: Electrochim. Acta, 1988, 33, 1123.
5.
BrusicV., FRISCHM. A., ELDRIDGEB. N., NOVAKF. P., KAUFMANF. B., RUSHB. M., and FRANKELG. S.: J. Electrochem. Soc., 1991, 138, 2253.
6.
FoxE G., LEWISG., and BODEN:P. J.Corros. Sci., 1979, 19, 457.
7.
FleischmannM., HILLI. R., MENGOLIG., MUSIANIM. M., and AKHAVANJ.: Electrochim. Acta, 1985, 30, 879.
8.
MansfeldF., SMITHT., and PARRYE. P.: Corrosion, 1971, 27, 289.
9.
WUJ. S. and NobeKen: Corrosion, 1981, 37, 223.
10.
AshourE. A., SAYEDS. M., and ATEAB. G.: J. Appl. Electrochem., 1995, 25, 137.
11.
AbenT. and TROMANSD.: J. Electrochem. Soc., 1985, 142, 398.
12.
AlkireR. and CANGELLARIA.: J. Electrochem. Soc., 1989, 136, 913.
13.
ClercC. and ALKIRER.: J. Electrochem. Soc., 1991, 138, 25.
14.
TromansD. and SUNR.: J. Electrochem. Soc., 1991, 138, 3235.
15.
EL-SOBKIK. M., IsmailA. A., SANADS. H., and KILEDRA. A.: Egypt. J. Chem., 1981, 24, 179.
16.
SaberT. M. H., EL DINA. M. K. TAG, and SHAMS EL DINA. M.: Br. Corros. J., 1992, 27, 139.
17.
EL WARRAKYA. A. and EL DAHANH. A.: J. Mater. Sci., 1997, 32, 3693.
18.
SankarapapavinasamS., PUSHPANADENF., and AHMEDM. F.: Corros. Sci., 1991, 32, 193.
19.
Gad AllaA. G., BADAWYM. W., REHMANH. H., and ROMIAM. M. A.: J. Appl. Electrochem., 1989, 19, 928.
20.
FleischmannM., MENGOLIG., MUSIANIM. M., and PAGURAG.: Electrochim. Acta, 1985, 30, 1591.
21.
NandeeshL. S. and SHESHADRIB. S.: Br. Corros. J., 1988, 23, 239.
22.
DesaiM. N. and SHAHV. K.: Corros. Sci., 1972, 12, 725.
23.
SinghM. M., RASTOGIR. B., and UPADHAYB. N.: Corrosion, 1994, 50, 620.
24.
StuttsK. J., SCORTICHINIC. L., GREGORYT. D., BABINECS. T., REPUCCIC. M., and PHILLIPSR. F.: J. Appl. Electrochem., 1989, 19, 349.
25.
WUY. C., ZhangP., PICKERINGH. W., and ALLARAD. L.: J. Electrochem. Soc., 1993, 140, 2791.
26.
EL WARRAKYA. A.: J. Mater. Sci., 1996, 31, 119.
27.
SaberT. M. and EL WARRAKYA. A.: Br. Corros. J., 1991, 26, 279.
28.
EL WARRAKYA. A.: Br. Corros. J., 1997, 32, 57.
29.
RobertsD. F.: J. Electron Spectrosc., 1974, 4, 274.
30.
ChadwickD. and HASHEMIT.: J. Electron Spectrosc., 1977, 10, 79.
31.
ChadwickD. and HASHEMIT.: Corros. Sci., 1978, 18, 39.
32.
EL WARRAKYA. A. and HagazyH. S.: Egypt J. Chem., to be published.
33.
IofaZ. A., BATRAKOVV. V., and NGOK PAH.: Zashchita Metallov., 1965, 1, 61.
34.
IofaZ. A.: Proc. 2nd Eur. Symp. on ‘Corrosion inhibition’, 1966, University of Ferrara, 151.
35.
SalekhF. K. H. and IOFAZ. A.: Zashchita Metallov., 1970, 6, 231.
36.
RozenfeldI. L.: ‘Corrosion inhibition’, 109; 1981, New York, NY, McGraw Hill.
