KINETICS OF THE INTERACTION OF ALUMINIZED 12X18H10T STEEL WITH THE MOLTEN CARBONATES OF ALKALINE-METALS

Citation
Vi. Elkina et al., KINETICS OF THE INTERACTION OF ALUMINIZED 12X18H10T STEEL WITH THE MOLTEN CARBONATES OF ALKALINE-METALS, Protection of metals, 32(1), 1996, pp. 18-21
Citations number
6
Categorie Soggetti
Metallurgy & Metallurigical Engineering
Journal title
ISSN journal
00331732
Volume
32
Issue
1
Year of publication
1996
Pages
18 - 21
Database
ISI
SICI code
0033-1732(1996)32:1<18:KOTIOA>2.0.ZU;2-J
Abstract
Corrosion of aluminized 12X18H10T steel in a melt of potassium and lit hium carbonates at 650 degrees C in a CO2-O-2 atmosphere was investiga ted in time, by means of polarization curves, x-ray diffraction, micro spectroscopic, chemical, and metallographic analysis methods. The alum inization of the steel was carried out in a halide melt with aluminum powder at 600 degrees C for 8 h. An oxide layer of 10-15 mu m in thick ness was shown to form on the aluminized surface, while the average co rrosion rate decreases with time, the aluminum content in the coating decreases; the passivation performance deteriorates, especially at mor e than 1000 h exposure; and the thicknesses of coating and oxide layer do not substantially change.