skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Effects of sulfide ions on the integrity of the protective film of benzotriazole on alpha brass in salt water

Abstract

The addition of sulfide ions to a solution of 0.58 M NaCl containing benzotriazole (BTAH) results in a decrease of the inhibiting efficiency of BTAH and a momentary increase of the dissolution rate of alpha brass at potentials above the corrosion potential. The effect depends on the sulfide ion concentration and the potential selected for the tests. The results are explained by decomposition of the protective Cu(I)BTA film, caused by the extraction of Cu(I) ions from the film and formation of Cu{sub 2}S: nS{sup 2{minus}} + 2[Cu(I)BTA]{sub n} {yields} nCu{sub 2}S + 2nBTA{sup {minus}}. The breakdown of the film allows metal dissolution from the bare surface and further promotes the effects of sulfide ions.

Authors:
; ;
Publication Date:
Research Org.:
National Research Center, Cairo (EG)
OSTI Identifier:
20080576
Resource Type:
Journal Article
Journal Name:
Journal of the Electrochemical Society
Additional Journal Information:
Journal Volume: 147; Journal Issue: 5; Other Information: PBD: May 2000; Journal ID: ISSN 0013-4651
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; BRASS-ALPHA; CORROSION PROTECTION; PROTECTIVE COATINGS; CORROSION INHIBITORS; TRIAZOLES; SULFIDES; CATALYTIC EFFECTS; ELECTROCHEMICAL CORROSION

Citation Formats

Ashour, E.A., Hegazy, H.S., and Ateya, B.G. Effects of sulfide ions on the integrity of the protective film of benzotriazole on alpha brass in salt water. United States: N. p., 2000. Web. doi:10.1149/1.1393432.
Ashour, E.A., Hegazy, H.S., & Ateya, B.G. Effects of sulfide ions on the integrity of the protective film of benzotriazole on alpha brass in salt water. United States. doi:10.1149/1.1393432.
Ashour, E.A., Hegazy, H.S., and Ateya, B.G. Mon . "Effects of sulfide ions on the integrity of the protective film of benzotriazole on alpha brass in salt water". United States. doi:10.1149/1.1393432.
@article{osti_20080576,
title = {Effects of sulfide ions on the integrity of the protective film of benzotriazole on alpha brass in salt water},
author = {Ashour, E.A. and Hegazy, H.S. and Ateya, B.G.},
abstractNote = {The addition of sulfide ions to a solution of 0.58 M NaCl containing benzotriazole (BTAH) results in a decrease of the inhibiting efficiency of BTAH and a momentary increase of the dissolution rate of alpha brass at potentials above the corrosion potential. The effect depends on the sulfide ion concentration and the potential selected for the tests. The results are explained by decomposition of the protective Cu(I)BTA film, caused by the extraction of Cu(I) ions from the film and formation of Cu{sub 2}S: nS{sup 2{minus}} + 2[Cu(I)BTA]{sub n} {yields} nCu{sub 2}S + 2nBTA{sup {minus}}. The breakdown of the film allows metal dissolution from the bare surface and further promotes the effects of sulfide ions.},
doi = {10.1149/1.1393432},
journal = {Journal of the Electrochemical Society},
issn = {0013-4651},
number = 5,
volume = 147,
place = {United States},
year = {2000},
month = {5}
}