|
|
Article: Solubility, diffusivity, and chemical reactivity of sulfur dioxide with an alkyd paint.
- Article from:
- The Journal of Coatings Technology
- Article date:
- September 1, 1992
- Author:
CopyrightCOPYRIGHT 1992 Federation of Societies for Coatings Technology. This material is published under license from the publisher through the Gale Group, Farmington Hills, Michigan. All inquiries regarding rights should be directed to the Gale Group. (Hide copyright information)
|
Sorption-desorption studies were conducted with a representative alkyd paint using sulfur dioxide as the penetrant gas. These measurements were used to determine the diffusivity and solubility of the gas in the paint film. The sorption kinetics curves were Fickian in nature for [SO.sub.2] pressures ranging from 40-700 torr, while the solubility followed Henry's law. A residual amount of [SO.sub.2] was found to remain in the samples after extended exposure to vacuum. The residual can be as much as 47% of the equilibrium amount of [SO.sub.2] sorbed by the sample when the sample is cured at normal temperatures (25 [degrees]). it was determined that this residual [SO.sub.2] ...