Quantum chemistry study on the effect of Cl- ion on anodic dissolution of iron in H2S-containing sulfuric acid solutions

Citation
Lj. Yan et al., Quantum chemistry study on the effect of Cl- ion on anodic dissolution of iron in H2S-containing sulfuric acid solutions, CORROS SCI, 41(12), 1999, pp. 2303-2315
Citations number
11
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Material Science & Engineering
Journal title
CORROSION SCIENCE
ISSN journal
0010-938X → ACNP
Volume
41
Issue
12
Year of publication
1999
Pages
2303 - 2315
Database
ISI
SICI code
0010-938X(199912)41:12<2303:QCSOTE>2.0.ZU;2-9
Abstract
The effect of Cl- ion on the anodic dissolution of iron in H2SO4 solutions containing low H2S level has been studied by electrochemical polarization c urve measurements. The total energy and binding energy of the competitive a dsorption for Cl- and HS- ions have been calculated with CNDO/2 method, as well as the net charge distribution of iron atoms at an anodic potential. T he results showed that certain concentration of Cl- ion inhibit the anodic reaction of iron accelerated by HS-. However, when Cl- ion reached saturate d adsorption, it began to promote the anodic reaction of iron due to the in creased negative charge of iron atoms. (C) 1999 Elsevier Science Ltd. All r ights reserved.