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
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.