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
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.