Nitrite based rust inhibitor complex

Details Nitrite based rust inhibitor complex Nitrite based rust inhibitor complex

1977-01-03

1978-02-14

Padgett, Benjamin R.

Compositions

Preservative agents

Anti-corrosion

21 25R, 21 27R, 106 14, 208 47, 252 855E, 252 68, 252387, 423400, C23F 1114

Patent

active

040737446

ABSTRACT:
An oil dispersible rust inhibitor consisting of a chemical complex of a metal nitrite with a hetero-atomic aprotic polar organic solvent. Preferred metal nitrites are the alkali, alkaline earth metals or nickel, zinc, or cadmium nitrites. Preferred solvents are dimethylsulfoxide, dimethylformamide, dibutylformamide, n-methylpyrrolidone, dioxane, ethylcarbonate, tetrahydrofuran and their derivatives. The complex is prepared by reacting a nitrite ion with a solution of a basically reacting metal salt in the selected solvent. The excess metal salt is removed from the solution after completion of the reaction. The complex is readily solubilized in oil through the use of common dispersants.

REFERENCES:
patent: 3433577 (1969-03-01), Shick
patent: 3925245 (1975-12-01), Harris et al.

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