Characteristics of polyacrylic acid-complexed zinc phosphate conversion films deposited on metal surfaces

Conference · Sun Jan 01 04:00:00 EST 1984

OSTI ID:6068608

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

When water-soluble polyacrylic acid (PAA) macromolecules having MW 90,000 to 250,000 are introduced into zinc phosphating liquids, significant improvements in the properties of conventional crystalline zinc phosphate conversion films deposited on carbon steel surfaces can be obtained. The improvements include the controllability of the crystal dimensions, the degree of crystallinity, and the coating weight. The conversion complex formation plays an essential role in increasing the ductility of the normally brittle conventional crystal films. Furthermore, the thickness (20 to 40 A) and surface roughness of the thin PAA overlayer significantly acts to enhance the adhesive force at the interface between organic polymer topcoats and the complex coating.

• Research Organization: Brookhaven National Lab., Upton, NY (USA)
• DOE Contract Number: AC02-76CH00016
• OSTI ID: 6068608
• Report Number(s): BNL-35508; CONF-841124-2; ON: DE85004057
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360105* -- Metals & Alloys-- Corrosion & Erosion
ADHESION
ALLOYS
CARBON STEELS
COATINGS
CORROSION PROTECTION
DIMENSIONS
ESTERS
FILMS
IRON ALLOYS
IRON BASE ALLOYS
ORGANIC COMPOUNDS
ORGANIC POLYMERS
OXYGEN COMPOUNDS
PHOSPHATES
PHOSPHORUS COMPOUNDS
POLYACRYLATES
POLYMERS
POLYVINYLS
PROTECTIVE COATINGS
STEELS
THICKNESS
ZINC COMPOUNDS
ZINC PHOSPHATES