Metal oxide remover containing a strong mineral acid, chelating

Details Metal oxide remover containing a strong mineral acid, chelating Metal oxide remover containing a strong mineral acid, chelating

1979-07-03

1981-02-10

Pitlick, Harris A.

Compositions

Compositions containing a single chemical reactant or plural...

Organic reactant

134 3, 134 41, C11D 732, C11D 726, C11D 708

Patent

active

042500486

ABSTRACT:
Composition and method for removing metal oxides from ferrous metals. The composition contains an ammonia derivative such as an amine, a strong mineral acid and an organic chelating agent for the metal oxides in an aqueous solution having an acidic pH of about 0.5-3.0. Metal oxides are most readily removed by applying the solution at elevated temperature.

REFERENCES:
patent: 2981633 (1961-04-01), Davis et al.
patent: 3072502 (1963-01-01), Alfano
patent: 3349043 (1967-10-01), Mannin g et al.
patent: 3806459 (1974-04-01), Petrey
patent: 3993575 (1976-11-01), Howanitz et al.
patent: 4174290 (1979-11-01), Leveskis

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