| Influence of Hydrostatic Pressure on the Thermodynamics and Kinetics of Metal Corrosion | |
| Ma Rongyao1,2; Zhao Lin1; Wang Changgang1; Mu Xin1; Wei Xin1; Dong Junhua1; Ke Wei1 | |
| Corresponding Author | Dong Junhua(jhdong@imr.ac.cn) |
| 2019-02-11 | |
| Source Publication | ACTA METALLURGICA SINICA
 |
| ISSN | 0412-1961 |
| Volume | 55Issue:2Pages:281-290 |
| Abstract | In recent years, researches on deep sea corrosion have attracted much attention of many researchers. The high hydrostatic pressure is a distinctive feature of deep-sea environment. The hydrostatic pressure affects the corrosive behavior of metallic materials by modifying the composition, structure and compactness of corrosion products, changing the polarization processes of cathode electrode and anode electrode, altering pitting nucleation rate and growth rate, impacting on chemical reaction rate and equilibrium constant, and varying hydrogen diffusion rate and coverage. However, in essence, the influence of hydrostatic pressure on the corrosion behavior of different metal materials is the manifestation of the thermodynamic and kinetic parameters of the corrosion electrode process caused by hydrostatic pressure. At present, the mechanism of effect of hydrostatic pressure on the thermodynamics and kinetics of corroding electrode processes is unclear yet. In addition, the concerns about the effects of hydrostatic pressure on the chemical properties of materials and seawater are comparatively low. Based on thermodynamics and kinetics, the effects of hydrostatic pressure on the activities of electrode material and ions in environment, including on the solubility, fugacity or activity of gases in environment are analyzed. The influence of hydrostatic pressure on pH value and chemical equilibrium is also discussed. The relationships between hydrostatic pressure and equilibrium electrode potential, as well as the exchange current density, are analyzed. The theoretical model of the effect of hydrostatic pressure on the corrosion behavior of active metals is established. The studies have shown that hydrostatic pressure would increase the activities of materials, ions and dissolved gas in environments, and this is closely related to their partial molar volume. The hydrostatic pressure would magnify the difference in the activity of heterogeneous materials. The larger the partial molar volume difference of the heterogeneous materials, the more obvious the difference in activity. Increasing hydrostatic pressure reduces the equilibrium electrode potential of iron and aluminum anode dissolution reaction while reducing its exchange current density. Increasing hydrostatic pressure increases the equilibrium electrode potential of oxygen reaction and decreases its exchange current density. Increasing hydrostatic pressure reduces the equilibrium electrode potential of hydrogen evolution reaction and increases its exchange current density. |
| Keyword | hydrostatic pressure activity fugacity solubility equilibrium electrode potential exchange current density |
| Funding Organization | National Key Research and Development Program of China ; National Natural Science Foundation of China |
| DOI | 10.11900/0412.1961.2018.00215 |
| Indexed By | SCI |
| Language | 英语 |
| Funding Project | National Key Research and Development Program of China[2017YFB0702302] ; National Natural Science Foundation of China[51671200] ; National Natural Science Foundation of China[51501204] |
| WOS Research Area | Metallurgy & Metallurgical Engineering |
| WOS Subject | Metallurgy & Metallurgical Engineering |
| WOS ID | WOS:000455945800013 |
| Publisher | SCIENCE PRESS |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.imr.ac.cn/handle/321006/131314 |
| Collection | 中国科学院金属研究所 |
| Corresponding Author | Dong Junhua |
| Affiliation | 1.Chinese Acad Sci, Inst Met Res, Shenyang 110016, Liaoning, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China |
| Recommended Citation GB/T 7714 | Ma Rongyao,Zhao Lin,Wang Changgang,et al. Influence of Hydrostatic Pressure on the Thermodynamics and Kinetics of Metal Corrosion[J]. ACTA METALLURGICA SINICA,2019,55(2):281-290. |
| APA | Ma Rongyao.,Zhao Lin.,Wang Changgang.,Mu Xin.,Wei Xin.,...&Ke Wei.(2019).Influence of Hydrostatic Pressure on the Thermodynamics and Kinetics of Metal Corrosion.ACTA METALLURGICA SINICA,55(2),281-290. |
| MLA | Ma Rongyao,et al."Influence of Hydrostatic Pressure on the Thermodynamics and Kinetics of Metal Corrosion".ACTA METALLURGICA SINICA 55.2(2019):281-290. |
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