Process for increasing the corrosion resistance of nitrided stru

Details Process for increasing the corrosion resistance of nitrided stru Process for increasing the corrosion resistance of nitrided stru

1980-08-13

1981-09-29

Kendall, Ralph S.

Metal treatment

Compositions

Heat treating

148 155, C23F 704

Patent

active

042920949

ABSTRACT:
To increase the corrosion resistance of nitrided structural parts made of iron materials which are useful for all types of iron and steel there is carried out an oxidation treatment in connection with the nitriding process. The oxidation treatment is carried out for 15 to 50 minutes in an oxidizing salt bath. The salt bath preferably consists of alkali hydroxides with 2 to 20% of alkali nitrates.

REFERENCES:
patent: 2513302 (1950-07-01), Feild
patent: 2639244 (1953-05-01), Vordahl et al.
patent: 4055446 (1977-10-01), Kunst et al.

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