Effect of temperature on the transfer between epoxy coatings and water

✍ Scribed by S. Laoubi; J.M. Vergnaud

• Publisher: Elsevier Science
• Year: 1991
• Tongue: English
• Weight: 365 KB
• Volume: 27
• Category: Article
• ISSN: 0014-3057
• DOI: 10.1016/0014-3057(91)90247-l

✦ Synopsis

When coatings made of epoxy resin are in contact with water, a matter transfer generally takes place controlled by diffusion. When this pre-saturated coating is exposed to air, part of the water previously absorbed is evaporated; this process of drying is controlled by diffusion within the solid and evaporation from the surface. The effect of temperature, not only on the rate of the absorption and drying but also on the amount of water absorbed and desorbed, is of great importance. The 60-100 ° temperature range is explored. Numerical models are built in order to describe the process of absorption and desorption. They give kinetics which correlate very well with the results of experiments, and they are able to determine the profiles of concentration of water through the coating.