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Si diffusion coating on steels by SiH4/H2 treatment for high temperature oxidation protection

Published online by Cambridge University Press:  31 January 2011

A. L. Cabrera ,
J. F. Kirner  and
R. Pierantozzi
A. L. Cabrera
Affiliation:
Air Products and Chemicals, Inc., Allentown, Pennsylvania 18195
J. F. Kirner
Affiliation:
Air Products and Chemicals, Inc., Allentown, Pennsylvania 18195
R. Pierantozzi
Affiliation:
Air Products and Chemicals, Inc., Allentown, Pennsylvania 18195
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Abstract

The reaction of SiH4/H2 mixtures with iron and steels was studied at a total pressure of 1 atm and temperatures above 500 °C. When the amount of water vapor in the gas mixture is carefully controlled, a metal silicide diffusion coating forms at low temperatures (below 900°C). Composition and structure of the Si diffusion coatings were determined with Auger depth profiling and x-ray diffraction. Kinetics of the surface reaction between SiH4, and the metal substrate as well as the behavior of these films in severe environments at high temperatures were studied by a microgravimetric technique. Characterization of these Si coatings on iron, low carbon steel (1010), 9% Cr/1% Mo steel (alloy A182F9), and stainless steels (310) and their applications to reduce oxidation, nitriding, or coking at high temperatures or corrosion in mineral acids are described.

Type
Articles
Information
Journal of Materials Research , Volume 5 , Issue 1 , January 1990 , pp. 74 - 82
Copyright
Copyright © Materials Research Society 1990

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