Compositions – Compositions containing a single chemical reactant or plural... – Organic reactant
Patent
1982-02-05
1983-08-23
Kittle, John E.
Compositions
Compositions containing a single chemical reactant or plural...
Organic reactant
134 3, 134 41, C11D 708, C23G 108, C23G 112, C11D 710
Patent
active
044002890
ABSTRACT:
A pickling and rust-removing paste composition suitable for cleaning metal surfaces, including surfaces of steel and aluminum. The composition contains fluoride ions and a mixture of calcium compounds and tervalent iron and/or aluminum compounds and has an acidity corresponding to at least 10% by weight of free acid, calculated at 100% HF. The composition also most preferably contains at least one anion selected from nitrate, sulfate, phosphate and chloride and has an acidity corresponding to from about 15 to 30% by weight of free acid, calculated as 100% HF.
The composition is applied to that portion of the metal surface, such as steel or aluminum, to be treated and is retained in contact with the surface for a period of time sufficient to effect the desired pickling and/or removal of rust on the surface.
REFERENCES:
patent: 2408424 (1946-10-01), Healy et al.
patent: 2631950 (1953-03-01), Rosenfeld et al.
Danzel Horst
Geldner Joachim
Rones Josef
Kittle John E.
Mueller Richard P.
Occidental Chemical Corporation
Wax Robert A.
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