Corrosion of Alumina Ceramics in an Aqueous Solution of Sodium Chloride

被引：2
|
作者：
Galuskova, Dagmar [1 ]
Sajgalik, Pavol [2 ]
Galusek, Dusan [1 ]
Hnatko, Miroslav [2 ]
机构：
[1] Alexander Dubcek Univ Trencin, Slovak Acad Sci, Inst Inorgan Chem, Vitrum Laugaricio Joint Glass Ctr, Studentska 2, Trencin 91150, Slovakia
[2] Slovak Acad Sci, Inst Inorgan Chem, Bratislava, Slovakia
来源：
FRACTOGRAPHY OF ADVANCED CERAMICS III | 2009年 / 409卷
关键词：
alumina ceramics; sodium chloride; corrosion;
D O I：
10.4028/www.scientific.net/KEM.409.283
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：
Two alumina based ceramics with 99.99% and 95% of Al2O3 were evaluated after dissolution in an aqueous solution containing 0.5 mol/l NaCl at temperatures of 150 and 200 degrees C. The weight loss of liquid phase sintered alumina was mainly attributed to congruent dissolution of SiO2 and CaO from grain-boundary amorphous film, which is accelerated at higher temperature, accompanied by precipitation of silicaceous phases from oversaturated solution at 200 degrees C. Pure polycrystalline alumina corroded by loss of alumina grains, which do not dissolve in the corrosion media.
引用
收藏
页码：283 / +
页数：2
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