Descaling/deglassing salt composition and method

Details Descaling/deglassing salt composition and method Descaling/deglassing salt composition and method

1991-08-16

1993-06-22

Morris, Theodore

Cleaning and liquid contact with solids

Processes

For metallic, siliceous, or calcareous basework, including...

252 795, 252 792, 252 793, 252 80, C09K 1302, C09K 1304, C09K 1308, C23G 102

Patent

active

052213587

ABSTRACT:
An improved salt and method for descaling and deglassing metals, especially metal forgings and even more specifically, titanium forgings wherein glass has been utilized as a forging lubricant, is provided. A composition of the salt has at least one alkali metal hydroxide, at least one alkali metal nitrate and at least one alkali metal or alkaline earth metal fluoride. Preferably, the salt includes from about 60-75% sodium hydroxide, from about 15-25% potassium hydroxide, from about 3-6% sodium fluoride, and from about 5-10% sodium nitrate. The specific preferred composition is one which contains about 67.5% sodium hydroxide, about 18% potassium hydroxide, about 4.5% sodium fluoride and about 10% sodium nitrate.

REFERENCES:
patent: 2468006 (1949-04-01), Webster
patent: 2630393 (1953-03-01), Francis
patent: 3260619 (1966-07-01), Shoemaker et al.

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