Compositions – Compositions containing a single chemical reactant or plural... – Organic reactant
Patent
1979-05-14
1983-04-26
Albrecht, Dennis L.
Compositions
Compositions containing a single chemical reactant or plural...
Organic reactant
148 617, 252147, 252149, 252391, 252526, 252529, C11D 144, C23F 902, C23G 106, C23G 108
Patent
active
043812490
ABSTRACT:
A rust removing and metal surface protecting composition, which comprises about 99.5% by weight of phosphoric acid at 85% concentration, from 0.11 to 0.14% by weight of 1,3-dibutyl thiourea, from 0.09 to 0.11% by weight of 1,3-diethyl thiourea, about 0.025% by weight of a non-ionic surface active agent, from 0.10 to 0.20% by weight of an organic solvent, and from 0.08 to 0.18% by weight of an amine selected from the group consisting of polyoxyethylene fatty alkyl amines containing 2 to 15 moles of ethylene oxide, the fatty alkyl group of which being derived from fatty acids having 12 to 18 carbon atoms. The composition is effective in removing rust on metal surfaces and protecting the metal against corrosion with a hard, crystalline phosphate coating. It can be easily applied by dipping, spraying or brushing.
REFERENCES:
patent: 3047510 (1962-07-01), Cizek
patent: 3188292 (1965-06-01), Pirotte
patent: 3277011 (1966-10-01), Chadwick
patent: 3325415 (1967-06-01), Kenney
patent: 3578607 (1971-05-01), Riggs
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