TITLE:
Performance of Nanostructured Metal Nitride Coated T-22 Boiler Steel in Na2SO4–60% V2O5 Environment at 900°C under Cyclic Conditions
AUTHORS:
Vikas Chawla, Amita Chawla, D. Puri, S. Prakash, Buta Singh Sidhu
KEYWORDS:
Nanostructured coating, Hot corrosion, Oxide Scale, Physical vapour deposition, Scale morphology.
JOURNAL NAME:
Journal of Minerals and Materials Characterization and Engineering,
Vol.10 No.7,
June
6,
2011
ABSTRACT: In this work, TiAlN and AlCrN coatings were deposited on ASTM-SA213-T-22 boiler steel using
Balzer’s rapid coating system (RCS) machine (make Oerlikon Balzers, Swiss) under a reactive
nitrogen atmosphere. Cyclic oxidation studies in molten salt environment were conducted at
900°C temperature in the laboratory using silicon carbide furnace. The weight gain was measured after each cycle and visually examined the surface morphology of the oxidized samples was studied using FE-SEM with EDAX attachment and XRD analysis. The results obtained showed the better performance of TiAlN coated T-22 boiler steels than the AlCrN coated and uncoated T-22 boiler steel.