Transition metal salt compositions that eliminate hydrogen absor

Details Transition metal salt compositions that eliminate hydrogen absor Transition metal salt compositions that eliminate hydrogen absor

1998-03-17

1999-11-16

Wysomierski, George

Metal treatment

Process of modifying or maintaining internal physical...

Heating or cooling of solid metal

148713, C21D 168

Patent

active

059850590

ABSTRACT:
A method of controlling bulk absorption of atomic hydrogen and facilitating degassing of hydrogen from a metal or metal alloy workpiece during heat treatments in furnaces with ambient and/or moisture-laden atmospheres, the method includes exposing the surface of the workpiece to an acidified inorganic salt solution or dispersion, with the inorganic salt of the solution containing a transition metal cation and a sulfate, phosphate or nitrate anion, before being subjected to said heat-treatment, said transition metal cation having an equal or positive standard reduction half-reaction potential relative to metal or metal alloy workpiece, the workpiece exposed to the acidified transition metal sulfate, phosphate or nitrate salt is subjected to a heat treatment. The acidified transition metal sulfate, phosphate or nitrate salt is used to substantially decrease the amount of atomic hydrogen entering the bulk of the workpiece during heat treatment and to facilitate removal of atomic and molecular hydrogen from the bulk of the metal or metal alloy workpiece.

REFERENCES:
patent: 2885313 (1959-05-01), Milliken
patent: 2885315 (1959-05-01), Milliken
patent: 2885316 (1959-05-01), Milliken
patent: 4391655 (1983-07-01), Thurston et al.
patent: 5052421 (1991-10-01), McMillen
patent: 5409156 (1995-04-01), Tsuji et al.
patent: 5753056 (1998-05-01), Opalka et al.

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