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

1996-11-25

1998-05-19

Simmons, David A.

Metal treatment

Process of modifying or maintaining internal physical...

Heating or cooling of solid metal

148703, 148417, 420528, C21D 300

Patent

active

057530564

ABSTRACT:
A method of controlling bulk absorption of atomic hydrogen and facilitating degassing of hydrogen from aluminum alloy workpieces during heat treatment in furnaces with ambient and/or moisture-laden atmospheres. The method includes exposing the surface of the workpieces 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 the heat treatment. The workpieces are next subjected to the heat treatment, and the acidified transition metal sulfate, phosphate or nitrate salt is used to substantially decrease the amount of atomic hydrogen entering the respective bulks of the workpiece during heat treatment and to facilitate removal of atomic and molecular hydrogen from the bulks of the workpieces.

REFERENCES:
patent: 2885313 (1959-05-01), Milliken
patent: 2885315 (1959-05-01), Milliken
patent: 2885316 (1959-05-01), Milliken
patent: 2995479 (1961-08-01), Cochran et al.
patent: 4391655 (1983-07-01), Thurston et al.
patent: 5052421 (1991-10-01), McMillen
patent: 5409156 (1995-04-01), Tsuji et al.

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