Electroactive Coatings for Corrosion Protection in Marine Environments

Period of Performance: 12/19/1984 - 12/19/1986

$294K

Phase 2 SBIR

Recipient Firm

Sumx Corp.
P.O. BOX 14864, 221 DENTON DRIVE
Austin, TX 78761
Principal Investigator

Abstract

IN PHASE I, SUMX DEMONSTRATED NEW COATINGS FOR CORROSION PROTECTION WHICH MAINTAIN METALS IN A PASSIVE CONDITION DUE TO ELECTRON TRANSFER BETWEEN METALS AND IMMOBILIZED REDOX CENTERS IN COATINGS. PROTECTION AGAINST BOTH LOCALIZED AND UNIFORM CORROSION APPEARS TO BE FEASIBLE. SINCE THESE COATINGS PROTECT ELECTROCHEMICALLY, THEY ARE MORE EFFECTIVE THAN CONVENTIONAL COATINGS FOR PREVENTING CORROSION AT PINHOLES, HOLIDAYS, AND COATING RUPTURES. IN PHASE II, SUMX WILL TEST NEW REDOX COUPLES AND FORMULATIONS IN ACIDIC AND CHLORIDE-CONTAINING SYSTEMS. PHASE II WILL EMPHASIZE PROTECTION OF IRON AND LOW ALLOY METALS. COATED MATERIALS WILL BE STUDIED IN A RANGE OF ENVIRONMENTS. COATED METALS SHOULD BE MORE RESISTANT TO CERTAIN FORMS OF LOCALIZED CORROSION THAN CONVENTIONAL STEELS. THE COATINGS SHOULD ALLOW THE USE OF LESS EXPENSIVE METALS THAN NORMALLY FOUND IN CORROSIVE SERVICE. COATED METALS SHOULD SIGNIFICANTLY INCREASE PROTECTION AGAINST CREVICE CORROSION, CATASTROPHIC FAILURES, CORROSION AT GAS/LIQUID INTERFACES, AND CORROSION IN VARYING ENVIRONMENTS.