Method of quenching metals

Details Method of quenching metals Method of quenching metals

1984-10-22

1986-06-24

O'Keefe, Veronica

Metal treatment

Compositions

Heat treating

148 19, 148 206, 148 28, 148 29, 148 30, C21D 156, C21D 160

Patent

active

045966125

ABSTRACT:
A metal quenchant fluid which is a mixture of water and a polyalkylene glycol and a inhibitor is substantially nitrite free. The inhibitor is a soluble product obtained by mixing a carboxylic acid having 4 to 12 carbon atoms in the molecule, an amine such as an alkanolamine boiling above 150.degree. C. at atmospheric pressure and a copper chelating agent such as NN diethanol methylene benzotriazole.

REFERENCES:
patent: 3374171 (1968-03-01), Davis et al.
patent: 4177155 (1979-12-01), Popplewell
G. Butler and A. D. Mercer, J. Brit, Corrosion, vol. 12, No. 3, pp. 171-174, 1977.
P. M. Blanchard, Metallurgie and Metal Forming, pp. 177-180, Jun. 1973.

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