Functional pendent groups affecting chemisorption and adherent properties of polyelectrolyte-zinc phosphate composite conversion coatings
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
- Resource Relation:
- Conference: ADPA corrosion prevention and control conference, Williamsburg, VA, USA, 28 Apr 1986
- Country of Publication:
- United States
- Language:
- English
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Ductile polyelectrolyte macromolecule-complexed zinc phosphate conversion crystal pre-coatings and topcoatings embodying a laminate
Ductile polyelectrolyte macromolecule-complexed zinc phosphate conversion crystal pre-coatings and topcoatings embodying a laminate
Related Subjects
ELECTROLYTES
SORPTIVE PROPERTIES
POLYMERS
PROTECTIVE COATINGS
ZINC PHOSPHATES
ADHESION
CHEMISORPTION
CORROSION PROTECTION
CRYSTAL GROWTH
CHEMICAL REACTIONS
COATINGS
OXYGEN COMPOUNDS
PHOSPHATES
PHOSPHORUS COMPOUNDS
SEPARATION PROCESSES
SORPTION
SURFACE PROPERTIES
ZINC COMPOUNDS
360105* - Metals & Alloys- Corrosion & Erosion