TITLE:
Corrosion Behavior of Nanostructured TiAlN and AlCrN Hard Coatings on Superfer 800H Superalloy in Simulated Marine Environment
AUTHORS:
Vikas Chawla, D. Puri, S. Prakash, Buta Singh Sidhu
KEYWORDS:
Salt fog test, Physical vapor deposition, Corrosion, Nanostructured coatings, Pitting
JOURNAL NAME:
Journal of Minerals and Materials Characterization and Engineering,
Vol.8 No.9,
September
20,
2009
ABSTRACT: In this work, TiAlN and AlCrN coatings were deposited on Superfer 800H superalloy using
Balzer’s rapid coating system (RCS) machine (make Oerlikon Balzers, Swiss) under a reactive
nitrogen atmosphere. The corrosion resistance of the substrate, TiAlN and AlCrN coated
samples in a 5 wt% NaCl solution was evaluated and compared by salt fog (spray) test for 24
hrs, 48 hrs and 72 hrs. The samples were monitored and analyzed by using weight loss
measurement, XRD and SEM/EDAX techniques. There was no weight loss observed for coated
as well as uncoated specimens in all test conditions.