Study of Austenitic Alloy AISI304 Oxidation after Coating by Aluminum and Chromium at High Temperature
Rafidain Journal of Science,
2013, Volume 24, Issue 10, Pages 81-90
AbstractThe present research study the effect of metallic coating namely aluminizing and chromizing on the oxidation resistance of stainless steel alloy (AISI 304). The oxidation kinetics of a single stage coating such as Aluminized and Chromized alloy have been studied under atmospheric pressure at 1000 ˚C using a thermal cyclic oxidation then compared with uncoated alloy. The results show, the two samples of coatings such as aluminized and chromized which have a two different resistances of cyclic oxidation, two results show of three samples stainless steel alloy AISI 304 and aluminum, chromium coatings, the reduction in the weight after 225 (hr) is about (5.81-0.3-0.01)gm/cm2 successively. aluminized coating exhibited the greatest resistance to oxidation. The superiority protection of aluminized coating can be due to the formation of Al2O3 and improving scale via pegs formation.
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