Metal oxide remover containing a strong mineral acid, citric aci

Details Metal oxide remover containing a strong mineral acid, citric aci Metal oxide remover containing a strong mineral acid, citric aci

1977-09-30

1979-11-13

Pitlick, Harris A.

Compositions

Compositions containing a single chemical reactant or plural...

Organic reactant

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

Patent

active

041742907

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 citric acid in an aqueous solution having an acidic pH of about 0.5-3.0. Metal oxides are removed by applying the solution at elevated temperature.

REFERENCES:
patent: 1723923 (1929-08-01), Davidson
patent: 2505785 (1950-05-01), Moore
patent: 2981633 (1961-04-01), Davis et al.
patent: 2994664 (1961-08-01), Wachter
patent: 3003899 (1961-10-01), Eberhard et al.
patent: 3056746 (1962-10-01), Brightly
patent: 3095379 (1963-06-01), Schwartz
patent: 3492238 (1970-01-01), Wohlberg
patent: 3510432 (1970-05-01), Squire

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