Compositions – Preservative agents – Anti-corrosion
Patent
1975-03-03
1976-07-27
Engle, Samuel W.
Compositions
Preservative agents
Anti-corrosion
252400A, 21 27A, 166244C, 423269, C09K 300, C09K 1532, C23F 900, C01F 100
Patent
active
039717348
ABSTRACT:
The invention provides compositions and aqueous solutions containing a sulfite compound chosen from alkali metal and ammonium sulfites and bisulfites and at least one water soluble stabilizing compound which is an organic phosphonate containing at least two phosphonic acid groups per molecule. Also provided is a method of reducing the oxidation rate of aqueous sulfite solutions caused by oxygen in the atmosphere and a method of decreasing the corrosiveness to ferrous metals of aqueous systems containing dissolved oxygen and at least one divalent cation derived from iron, cobalt, copper, manganese, and nickel.
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Engle Samuel W.
House Roy F.
Larsen Delmar H.
Lehman Robert L.
NL Industries Inc.
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