Process for improving the corrosion resistance of ferrous metal

Details Process for improving the corrosion resistance of ferrous metal Process for improving the corrosion resistance of ferrous metal

1985-03-19

1986-08-26

Silverberg, Sam

Metal treatment

Compositions

Heat treating

148 15, C23C 2200, C23C 1634, C23C 1644, C23C 2278

Patent

active

046080929

ABSTRACT:
A process for improving the corrosion resistance of ferrous metal parts also subject to heat and chemical treatment following nitriding in association or not with carburizing and/or sulfurizing essentially comprises immersing the parts in a known bath of molten salts to which is added a sufficient quantity of a halogenophosphate having formula:

REFERENCES:
patent: 2271374 (1942-01-01), MacKay
patent: 4448611 (1984-05-01), Grellet et al.
Robin, Durand, Cot, Duprat, Bonnel and Dabosi: "Etude Physicochimique et ctrochimique de la Protection d'un Acier au Carbone par les Monofluorophosphates" in the Journal of Applied Electrochemistry 12 (1982), pp. 701-720.
Duprat, Bonnel, Dabosi, Durand and Cot: "Les Monofluorophosphates de Zinc et de Potassium en tant qu'Inhibiteurs de la Corrosion d'un Acier au Carbone en Solution de NaCl a 3%" in the Journal of Applied Electrochemistry 13 (1983), pp. 317-323.

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