Pitting of AISI 304L stainless steel coated with nano structured sol-gel alumina coatings in chloride containing acidic environments

被引：31
|
作者：
Ruhi, G. [1 ]
Modi, O. P. [1 ]
Singh, I. B. [1 ]
机构：
[1] CSIR, Adv Mat & Proc Res Inst, Bhopal 462064, Madhya Pradesh, India
来源：
CORROSION SCIENCE | 2009年 / 51卷 / 12期
关键词：
Steel; SEM; AFM; EIS; Pitting corrosion; CORROSION-RESISTANCE; FILMS; TEMPERATURE; 304-STAINLESS-STEEL; PARAMETER; BEHAVIOR; ALLOYS; WEAR;
D O I：
10.1016/j.corsci.2009.08.037
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Sol-gel coatings were applied on AISI 304L stainless steel and their pitting resistance was evaluated in different concentrations of chloride ions in 0.01 M H2SO4 solution. AFM and XRD analyses of the coated surface confirmed the presence of nano structured alpha-alumina phase in the coating. Anodic polarisation indicated a considerable shift of pitting potential of the substrate in the noble direction after applying coatings. The SEM micrographs of the polarised specimens revealed the presence of relatively less number of pits on the coated surface. EIS analysis demonstrated the occurrence of diffusion process at the coating/metal interfaces in chloride ions presence. (C) 2009 Elsevier Ltd. All rights reserved.
引用
收藏
页码：3057 / 3063
页数：7
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