Sol-Gel Coatings for Chemical Protection of Stainless Steel

被引：0
|
作者：
de Lima Neto, Pedro [1 ]
Atik, Mohamed [1 ]
Avaca, Luis A. [1 ]
Aegerter, Michel A. [1 ]
机构：
[1] Univ Sao Paulo, Inst Phys & Chem Sao Carlos, BR-13560970 Sao Carlos, SP, Brazil
来源：
JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY | 1994年 / 2卷 / 1-3期
基金：
巴西圣保罗研究基金会;
关键词：
thin film; ZrO2; SiO2; SiO2-TiO2; SiO2-Al2O3; corrosion protection; stainless steel 316L;
D O I：
暂无
中图分类号：
TQ174 [陶瓷工业]; TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
Sol-gel thin coatings of ZrO2, SiO2, 70SiO(2)-30TiO(2) and 88SiO(2)-12Al(2)O(3) compositions (mole %) have been prepared from sonocatalyzed sols and deposited by dip-coating technique on 316L stainless steel foils. The influence of the coatings on the chemical corrosion of the substrate has been measured through potentiodynamic polarization curves in aqueous 15% H2SO4 solution between 25 and 50 degrees C. The values of the corrosion potential, polarization resistance and corrosion rate have been determined. Analysis of the data combined with scanning electron microscopy studies indicate that the films act as a geometric blocking against exposure to the corrosive media and increase the lifetime of the substrate up to a factor 8.5.
引用
收藏
页码：529 / 534
页数：6
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