Functional pendent groups affecting chemisorption and adherent properties of polyelectrolyte-zinc phosphate composite conversion coatings

Conference · Tue Apr 01 04:00:00 EST 1986

OSTI ID:5541810

Sugama, T; Kukacka, L E; Carciello, N

The ability of polyelectrolyte macromolecules to suppress the crystal growth of zinc phosphate (Zn.Ph) conversion coatings depends primarily on the species of the functional pendent groups. The extent of chemisorption of carboxylic and sulfonic acid groups on the crystal faces was considerably higher than that for amide groups. The internal diffusion of polyelectrolyte on the Zn.Ph crystal acted significantly to improve the mechanical properties and alkaline resistance of the crystal coatings. The reaction products formed by chemical interactions between the urethane groups in the polyurethane topcoat and the carboxylic acid groups in the Zn.Ph composite precoat played an essential role in developing the interfacial adhesive forces.

• Research Organization: Brookhaven National Lab., Upton, NY (USA)
• DOE Contract Number: AC02-76CH00016
• OSTI ID: 5541810
• Report Number(s): BNL-38043; CONF-8604209-1; ON: DE86011537
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360105* -- Metals & Alloys-- Corrosion & Erosion
ADHESION
CHEMICAL REACTIONS
CHEMISORPTION
COATINGS
CORROSION PROTECTION
CRYSTAL GROWTH
ELECTROLYTES
OXYGEN COMPOUNDS
PHOSPHATES
PHOSPHORUS COMPOUNDS
POLYMERS
PROTECTIVE COATINGS
SEPARATION PROCESSES
SORPTION
SORPTIVE PROPERTIES
SURFACE PROPERTIES
ZINC COMPOUNDS
ZINC PHOSPHATES