Method of improving the wear and corrosion resistance of ferrous

Details Method of improving the wear and corrosion resistance of ferrous Method of improving the wear and corrosion resistance of ferrous

1995-10-13

1996-11-19

King, Roy V.

Coating processes

Immersion or partial immersion

Metal base

148242, B05D 118, C23C 2270

Patent

active

055760660

ABSTRACT:
A process for improving the wear and corrosion resistance of ferrous metal arts consists in immersing the parts, which have previously been treated using a nitriding, diffusion technique, in a molten salt bath comprising carbonates, nitrates, hydroxides and oxygenated alkali metal salts. The relative anionic proportions by weight of carbonates, nitrates and hydroxides expressed in terms of their sodium salts and corresponding to the active phase, that is the liquid in the bath, are as follows:

REFERENCES:
patent: 2639244 (1953-05-01), Vordahl et al.
patent: 3912547 (1975-10-01), Gaucher et al.
patent: 4006043 (1977-02-01), Gaucher et al.
patent: 4055446 (1977-10-01), Kunst et al.
patent: 4292094 (1981-09-01), Kunst et al.
patent: 4448611 (1984-05-01), Grellet et al.

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