Polyacrylic acid-modified zinc phosphate conversion coatings for corrosion protection of steel

Conference · Sun Jan 01 04:00:00 EST 1989

OSTI ID:5555048

Sugama, T.; Kukacka, L. E.; Carciello, N. ^[1]

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1. Brookhaven National Lab., Upton, NY (USA)

Polyacrylic acid, p(AA), electrolyte macromolecules diffused into crystalline zinc phosphate (Zn{center dot}Ph) conversion coatings that are precipitated onto cold-rolled steel by dissolution- recrystallization processes, enhance the corrosion protection of steel. One of the specific subserviences was that, when the NaOH- dissolution of Zn{center dot}Ph is considered, the Zn-OOC electrostatic bonds at p(AA)-Zn{center dot}Ph interfaces are transformed into Na{sup {plus minus}}OOC ionic bonds which associate with the salt complexed macromolecules. Another is the intermolecular chemical reactions between p(AA) and polymeric topcoats. These contributions relate directly to a lower cathodic delamination rate. 9 refs., 6 figs., 2 tabs.

• Research Organization: Brookhaven National Lab., Upton, NY (USA)
• Sponsoring Organization: DOD; DOE/ER
• DOE Contract Number: AC02-76CH00016
• OSTI ID: 5555048
• Report Number(s): BNL-42547; CONF-8910232--1; ON: DE90000533; CNN: MIPR-ARO-102-89
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360604* -- Materials-- Corrosion
Erosion
& Degradation
ACRYLIC ACID
ALLOYS
CARBOXYLIC ACIDS
COATINGS
COMPLEXES
CORROSION PROTECTION
CORROSION RESISTANCE
DISSOLUTION
IRON ALLOYS
IRON BASE ALLOYS
MECHANICAL PROPERTIES
MONOCARBOXYLIC ACIDS
ORGANIC ACIDS
ORGANIC COMPOUNDS
OXYGEN COMPOUNDS
PHOSPHATES
PHOSPHORUS COMPOUNDS
RECRYSTALLIZATION
STEELS
ZINC COMPOUNDS
ZINC PHOSPHATES