Citation: Li Jing YAN, Lin NIU, Hai Chao LIN, Wei Tao WU, Shang Zhang LIU. Effect of Cl^- ion on Anodic Iron Dissolution in H₂S-Containing Sulfuric Acid Solutions[J]. Chinese Chemical Letters, ;1998, 9(10): 945-948. shu

Effect of Cl^- ion on Anodic Iron Dissolution in H₂S-Containing Sulfuric Acid Solutions

1.
Institute of Corrosion and Protection of Metals, State Key Laboratory for Corrosion and Protection, Chinese Academy of Sciences, Shenyang 110015;
2.
Department of Chemistry, Liaoning University, Shenyang 110036

Received Date: 19 January 1998

Fund Project: This project was supported by NSFC (No. 59571058).

The effect of Cl^- ion on the anodic iron dissolution in H₂SO₄ solutions containing H₂S has been studied by using electrochemical polarization curve measurements. The competitive adsorption for Cl^- and HS^- ions at an anodic potential has been calculated using the CNDO/2 method. The results show that a certain concentration of the Cl^- ion can be adsorbed steadily and inhibit the anodic reaction of iron catalyzed by HS^-. However, when the Cl^- ion reaches the saturation adsorption, it begins to promote the anodic reaction of iron due to the increased negative charge of iron atoms.
- iron,
- anodic dissolution,
- Cl,
- H₂S,
- CNDO/2
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