Naslov
Chemical stability of alumina ceramics in sulphuric acid

Autori
Ćurković, Lidija ; Fudurić, Mirjana ; Kurajica, Stanislav

Izvornik
Materialprufung (0025-5300) 6 (2008); 336-340

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
alumina ceramics; corrosion; elution

Sažetak
The study of chemical stability of ceramics in acid and alkalis makes it possible to predict their service properties in these media. For this reason, the chemical resistance of cold isostatically pressed (CIP) high-purity alumina ceramics (99.8 % Al2O3) was studied in different concentration of sulphuric acid (2 wt. %, 10 wt. % and 20 wt. %) at room temperature. Chemical stability was monitored by determination of amount of Al3+, Mg2+, Ca2+, Na+ Si4+ and Fe3+ ions eluted in different concentration of sulphuric acid by means of atomic apsorption spectrophotometry (AAS). The corrosion rate constants for CIP-alumina specimens after immersion in H2SO4 solution using different concentration were determined. Increasing the concentration from 2 to 20 wt. % it was notified that the corrosion susceptibility in H2SO4 solutions for the CIP-alumina specimens at room temperature decreases.

Izvorni jezik
Engleski

Znanstvena područja
Kemijsko inženjerstvo, Strojarstvo

POVEZANOST RADA