Electrochemical corrosion behavior of Nanocrystalline materials

J. Mater. Sci. Technol. ›› 2010, Vol. 26 ›› Issue (1): 1-14.

• Reviews • 下一篇

Electrochemical corrosion behavior of Nanocrystalline materials

liuli¹;李瑛?²

1. State Key Laboratory for Corrosion and Protection; Institute of Metal Research; Chinese Academy of Sciences; Wencui Rd 62; Shenyang; 110016; China
2. 中国科学院金属研究所金属腐蚀与防护国家重点实验室

收稿日期:2009-09-15 修回日期:2009-11-23 出版日期:2010-01-31 发布日期:2010-01-22
通讯作者: liuli

Electrochemical Corrosion Behavior of Nanocrystalline Materials---a Review

Li Liu, Ying Li, Fuhui Wang

State Key Laboratory for Corrosion and Protection, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China

Received:2009-09-15 Revised:2009-11-23 Online:2010-01-31 Published:2010-01-22
Contact: liu li
Supported by:
the National Natural Science Foundation of China under grant Nos. 50801063 and 50671113

摘要/Abstract

关键词: Nanocrystalline materials, electrochemical corrosion

Abstract:

Nanocrystallization significantly influences the electrochemical corrosion behaviors of metals/alloys in liquid system. In active dissolution, nanocrystallization accelerates the corrosion reactions. If the corrosion products are dissoluble, the corrosion rate is increased by nanocrystallization; if the corrosion products are insoluble, the
corrosion rate is decreased on the contrary because the corrosion products act as a block layer to delay the dissolution. In passivation, nanocrystallization changes the composition of the passive film, and results into different morphology and growth process of the passive film, both of which improves the formation of compact film and influences the semiconductor property. It influences the passivation depending on fast element diffusion and special adsorbed ability. The small grain size improves the element diffusion, which leads to the different composition of passive film (passive elements enrichment such as Cr, Ti). The small grain size also changes the surface condition, which influences the ions adsorption. All increase the corrosion resistance of materials. In local corrosion, nanocrystallization increases the unstable points
on the surface of the materials, which increases the possibility of local corrosion. However, the excellent ability of element diffusion helps heal the local corrosion points, which inhibits the growth of the local corrosion.

Key words: SnO₂-CeO₂ anodes, Stainless steel, Electrochemical oxidation, Dye wastewater

liuli 李瑛. Electrochemical corrosion behavior of Nanocrystalline materials[J]. J. Mater. Sci. Technol., 2010, 26(1): 1-14.

Li Liu Ying Li Fuhui Wang. Electrochemical Corrosion Behavior of Nanocrystalline Materials---a Review[J]. J Mater Sci Technol, 2010, 26(1): 1-14.

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Electrochemical corrosion behavior of Nanocrystalline materials

Electrochemical Corrosion Behavior of Nanocrystalline Materials---a Review

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