Dissolution of alumina ceramics in HCl aqueous solution

被引：17

作者：

Curkovic, Lidija ^{[1
]}

Jelaca, Mirjana Fuduric ^{[2
]}

机构：

[1] Univ Zagreb, Fac Mech Engn & Naval Architecture, Zagreb 10000, Croatia

[2] Coll Safety, Zagreb, Croatia

来源：

CERAMICS INTERNATIONAL | 2009年 / 35卷 / 05期

关键词：

Corrosion; Alumina ceramics; Degree of dissolution; CORROSION BEHAVIOR; GRAIN-BOUNDARIES; SEGREGATION; GROWTH;

D O I：

10.1016/j.ceramint.2008.11.007

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：

Dissolution of a cold isostatically pressed high purity alumina ceramics in aqueous HCl solutions was studied as a function of immersion time and acid concentration. From the amounts of Al3+, Mg2+, Ca2+, Na+, Si4+ and Fe3+ ions released in the corrosive solution, a degree of dissolution Xi for each component was calculated according to the equation chi(i) = A/B, where A and B are respectively the amount of the element released in the corrosive solution and the amount of the element in the untreated material. The determination of the amounts of ions released in the corrosive solutions was carried out by means of atomic absorption spectrometry (AAS). The corrosion of alumina ceramics in the HCl aqueous solution is determined by the solubility of alumina and the solubility of grain-boundary impurities. Very low dissolution values of Al3+, Mg2+, Ca2+, Na+, Si4+ and Fe3+ ions after the corrosion test of alumina ceramics showed a very good corrosion resistance in the HCl aqueous solution. (C) 2008 Elsevier Ltd and Techna Group S.r.l. All rights reserved.

引用

页码：2041 / 2045

页数：5

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