SYNERGISTIC CORROSION INHIBITORS BASED ON SUBSTITUTED PYRIDINIUM COMPOUNDS

The present invention relates to a compound of the formula: wherein (a) A is independently selected from -SR1, -NR1R2, -PR1R2, -Si,R1R2R3, or -SnR1R2R3, R1, R2 and R3 are each independently selected from alkyl, cycloalkyl, alkylcycloalkyl, arylalkyl having from 1 to 20 carbon atoms or aryl, substituted aryl, or where R2 and R3 together form a heterocycle group, having from 4 to 20 carbon atoms, and n is an integer from 1 to 5; (b) Y is selected from a direct bond or -CR4R5-, wherein R4 and R5 are each independently selected from hydrogen, or alkyl group having 1 to 20 carbon atoms or R4 and R5 together form a cycloalkyl group having 4 to 20 carbon atoms; (c) Z is aryl or substituted aryl; and (d) X is halogen, sulfonate, carboxylate, phosphate, carbonate, sulfate, or MDm wherein M is boron, phosphorous, arsenic, antimony or silicon, D is fluorine, chlorine, bromine or iodine and m is 2, 3 or 4. These compounds are useful as synergistic corrosion inhibitors for metals. These compounds are also useful as bacteriostats, antifungal agents and as deicing agents as surfactants.