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Corrosion Behavior of Nanostructured TiAlN and AlCrN Hard Coatings on Superfer 800H Superalloy in Simulated Marine Environment
Metallurgical & Materials Engineering Department, I.I.T. Roorkee, Roorkee-247667, India
Metallurgical & Materials Engineering Department, I.I.T. Roorkee, Roorkee-247667, India
Metallurgical & Materials Engineering Department, I.I.T. Roorkee, Roorkee-247667, India
Mechanical Engineering Department, Y.C.E., Talwandi Saboo-151302,India
- 1 Metallurgical & Materials Engineering Department, I.I.T. Roorkee, Roorkee-247667, India
- 2 Metallurgical & Materials Engineering Department, I.I.T. Roorkee, Roorkee-247667, India
- 3 Metallurgical & Materials Engineering Department, I.I.T. Roorkee, Roorkee-247667, India
- 4 Mechanical Engineering Department, Y.C.E., Talwandi Saboo-151302,India
Journal of Minerals and Materials Characterization and Engineering·Volume 08 (2009)·Pages 693–700·Published 20 September 2009·DOI10.4236/jmmce.2009.89060
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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.
KeywordsSalt fog testPhysical vapor depositionCorrosionNanostructured coatingsPitting
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