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US 4,309,383 AGranted
Di-quaternary ammonium salts of .alpha.-1,4-thiazine alkanephosphonic acids as corrosion inhibitors
AssigneePetrolite Corporation
InventorPatrick M. Quinlan
Life of this patent
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Abstract
Use, as a corrosion inhibitor, of di-quaternary ammonium salts of .alpha.-1,4-thiazine alkanephosphonic acids.
Claims4
A process of inhibiting corrosion of metals exposed to a corrosive liquid medium which comprises adding to said corrosive liquid medium an effective amount of a compund having the formula ##STR21## where R is alkyl, alkenyl, cycloalkyl, aryl, alkaryl, aralkyl or hydroxyphenyl, R' is hydrogen or alkyl, Z is S, SO or SO.sub.2, M is hydrogen or a salt moiety, is a bridging group selected from alkylene, aralkylene, alkaralkylene, alkylene- or polyalkylene ether, alkenylene or alkinylene and X is a halide.
Dependencies are inferred from the claim text.