Protective coatings for alloys

Details Protective coatings for alloys Protective coatings for alloys

1989-03-29

1990-07-03

Silverman, Stanley

Coating processes

Electrical product produced

Integrated circuit, printed circuit, or circuit board

148279, 148280, 148285, 4273839, B05D 306

Patent

active

049389939

ABSTRACT:
Aluminium-containing alloys are protected against high temperature corrosive attack by providing an amorphous silica coating, e.g. by plasma assisted vapor deposition, followed by heat treating under conditions such that a coherent, protective alumina coating or layer is formed on the surface of the alloy in place of the silica coating. The silica protects the alloy from corrosion initially and then acts as an oxidant source so that aluminium from the alloy can react to form the alumina coating. The alloy may be a superalloy such as a nickel-base superalloy.

REFERENCES:
patent: 4778721 (1988-10-01), Sliemers et al.

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