Polyelectrolyte-diffused zinc phosphate conversion coatings and polyacid coupling primers for corrosion protection of steel and aluminum, and alkali-catalyzed hydrolysis of polyimide-based materials: Final report

Technical Report · Tue Aug 01 00:00:00 EDT 1989

OSTI ID:5709309

Sugama, T; Kukacka, L E; Carciello, N R; Warren, J B; Clayton, C R

Under US Army Research Office (ARO) sponsorship, Brookhaven National Laboratory (BNL) performed research on three topics: (1) polyelectrolyte-modified zinc phosphate (Zn/center dot/Ph) conversion coatings for the corrosion protection of steel, (2) water-soluble polyacid coupling primers for improving the corrosion resistance and adherence of polymeric paints, and (3) high-temperature lightweight polyimide material systems. In the first topic, it was found that insoluble crystalline zinc phosphate (Zn/center dot/Ph) conversion coatings can be produced on steel surfaces by immersing a surface-cleaned cold-rolled steel substrate into a BNL-developed phosphating solution containing three components, zinc orthophosphate dihydrate (Zn/sub 3/(PO/sub 4/)/sub 2/sup /minus////center dot/2H/sub 2/O), H/sub 3/PO/sub 4/, and water. The major phase in the conversion coating derived from this simple phosphating solution is the same zinc phosphate dihydrate as that used in the converting solution. Referring to the second topic, it was found that the poly(itaconic acid), p(IA), which contains two functional COOH groups located on the same backbone carbon, has potential for use as a water-soluble intermediate coupling primer for polymer adhesive/Al/sub 2/O/sub 3/ adherend joint systems. Emphasis in the third topic was placed on understanding the reaction processes and degradation mechanisms of PI polymers which occur at the interfaces between the PI and inorganic pigments in hydrothermal environments at /ge/150/degree/C.

• Research Organization: Brookhaven National Lab., Upton, NY (USA)
• DOE Contract Number: AC02-76CH00016
• OSTI ID: 5709309
• Report Number(s): BNL-43186; ON: DE89017597
• Resource Relation: Other Information: Portions of this document are illegible in microfiche products
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ALUMINIUM
CORROSION PROTECTION
POLYMERS
COATINGS
POLYURETHANES
STEELS
ZINC PHOSPHATES
ADHESION
AUGER ELECTRON SPECTROSCOPY
ELECTROLYTES
HYDROLYSIS
IMIDES
PAINTS
PROGRESS REPORT
ALLOYS
CHEMICAL REACTIONS
DECOMPOSITION
DOCUMENT TYPES
ELECTRON SPECTROSCOPY
ELEMENTS
IRON ALLOYS
IRON BASE ALLOYS
LYSIS
MATERIALS
METALS
ORGANIC COMPOUNDS
ORGANIC NITROGEN COMPOUNDS
ORGANIC POLYMERS
OXYGEN COMPOUNDS
PETROCHEMICALS
PETROLEUM PRODUCTS
PHOSPHATES
PHOSPHORUS COMPOUNDS
PLASTICS
POLYAMIDES
SOLVOLYSIS
SPECTROSCOPY
SYNTHETIC MATERIALS
ZINC COMPOUNDS
360604* - Materials- Corrosion
Erosion
& Degradation
360105 - Metals & Alloys- Corrosion & Erosion