中国科学院机构知识库网格
Chinese Academy of Sciences Institutional Repositories Grid
首页 机构 成果 学者
  
  1. CAS IR Grid
  2. 金属研究所
  3. 中国科学院金属研究所
Influence of Hydrostatic Pressure on the Thermodynamics and Kinetics of Metal Corrosion

文献类型：期刊论文

作者Ma Rongyao1,2; Zhao Lin1; Wang Changgang1; Mu Xin1; Wei Xin1; Dong Junhua1; Ke Wei1
刊名ACTA METALLURGICA SINICA
出版日期2019-02-11
卷号55期号:2页码:281-290
关键词hydrostatic pressure activity fugacity solubility equilibrium electrode potential exchange current density
ISSN号0412-1961
DOI10.11900/0412.1961.2018.00215
通讯作者Dong Junhua(jhdong@imr.ac.cn)
英文摘要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.
资助项目National Key Research and Development Program of China[2017YFB0702302] ; National Natural Science Foundation of China[51671200] ; National Natural Science Foundation of China[51501204]
WOS研究方向Metallurgy & Metallurgical Engineering
语种英语
WOS记录号WOS:000455945800013
出版者SCIENCE PRESS
资助机构National Key Research and Development Program of China ; National Natural Science Foundation of China
源URL[http://ir.imr.ac.cn/handle/321006/131313]  
专题金属研究所_中国科学院金属研究所
通讯作者Dong Junhua
作者单位1.Chinese Acad Sci, Inst Met Res, Shenyang 110016, Liaoning, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
推荐引用方式
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.

入库方式： OAI收割

来源：金属研究所

浏览0
下载0
收藏0
其他版本

除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。