Accession Number : ADA113975

Title :   Determination of the Effect of Composition, Structure and Electrochemical Mass Transport Properties on Adhesion and Corrosion Inhibition of Paint Films.

Descriptive Note : Final rept. 1 Nov 80-31 Oct 81,


Personal Author(s) : Ruggeri,Robert T ; Beck,Theodore R

PDF Url : ADA113975

Report Date : Oct 1981

Pagination or Media Count : 118

Abstract : Since 1979, nine paints meeting military specifications have been studied. Seven of these paints have been formulated with well known chemical compositions. A sequence of tests including dynamic mechanical, IR and UV spectroscopy, and small angle x-ray scattering was performed to determine the physical and chemical structure of the paints. At the same time, new apparatus and techniques were developed to measure the transport of ions and water through paint films. In the past year, Hittorf experiments have been conducted to measure the migration of sodium chloride and water through paints. Improved humidity chamber apparatus and techniques have been developed to measure the diffusivity and solubility of water in paints attached to metal substrates. Five new mathematical models, developed to interpret the results of these experiments, have been used to deduce the physical form of coatings applied to metals. Preliminary experiments have been conducted to measure the hydraulic permeability of electrolytes through paints. These experiments were performed to obtain coefficients needed for the corrosion model. Also, experiments have been initiated to determine which components of paints have the greatest influence on water diffusivity.

Descriptors :   *Paints, Plastic paints, Adhesion, Corrosion inhibition, Water, Diffusion, Vinyl plastics, Polyurethane resins, Transport properties, Mass transfer, Permeability, Electrochemistry, Migration, Sodium chloride, Ions, Thickness, Films, Coatings, Membranes, Physical properties, Chemical composition, Quantitative analysis, Coefficients, Test methods

Subject Categories : Polymer Chemistry

Distribution Statement : APPROVED FOR PUBLIC RELEASE