Regeneration of electrical conductivity of metallic surfaces

Details Regeneration of electrical conductivity of metallic surfaces Regeneration of electrical conductivity of metallic surfaces

1980-09-22

1982-03-30

Kendall, Ralph S.

Metal treatment

Compositions

Heat treating

148 635, 4271261, 4271266, 55 5, C23F 700, C23F 704

Patent

active

043222544

ABSTRACT:
The electrical conductivity of metallic surfaces may be regenerated in situ by treating the surface with a regenerating agent in the form of a hydrogen halide such as hydrogen chloride. Hydrogen halide may be utilized in either liquid, gaseous or vaporous form. If so desired, an ammonium salt such as ammonium chloride may also be used to enhance the regenerative powers of the hydrogen halide. For example, the surface of steel may be treated with hydrogen chloride and ammonium chloride to enhance the formation of ferric oxide which possesses a greater electrical conductivity than does ferrous oxide.

REFERENCES:
patent: 1522143 (1925-01-01), Rathbun
patent: 2728696 (1955-12-01), Singer
patent: 4170493 (1979-10-01), Schafer

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