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Influence of Microstructure on the Corrosion Behavior of a Ni-Si Alloy

Published online by Cambridge University Press:  21 February 2011

P. Kumar
P. Kumar*
Affiliation:
Cabot Corporation, P. O. Box 1296, Reading, PA 19603
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Abstract

Nickel-based alloys with over 7 percent silicon have excellent corrosion resistance to sulfuric acid, oleum and sulfate-ion-containing environments. This alloy is characterized by the presence of intermetallic Ni3Si (beta) and Ni5Si2 (gamma) phases in Ni-Si solid solution (alpha) matrix. The corrosion resistance is provided by the coarse intermetallic phases. Size of intermetallic phases is dependent on the processing condition and the heat treatment. The corrosion resistance can be changed by heat treatment.

Results of corrosion tests are explained in terms of microstructural features.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 39: Symposium G – High-Temperature Ordered Intermetallic Alloys I , 1984 , 537
Copyright
Copyright © Materials Research Society 1985

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