Modification of an alkyd resin coating by airflow

Abstract

The anti‐permeability of an alkyd coating was modified by controlled airflow during the curing process. After the immersion test, the thinner airflow‐modified region had the best anti‐permeability compared with other thicker regions. The abnormal permeation behavior could be attributed to the difference in air pressure caused by the airflow. A model involving solvent evaporation and defect formation processes was proposed to interpret the airflow affected abnormal permeation behavior. This defect modification method may be employed to improve the corrosion resistance of an alkyd coating in a selected area and improve the painting quality in practice.

Modification, Degradation and Evaluation of a Few Organic Coatings for Some Marine Applications

“…Apart from these natural environmental coating conditions well-known in industries, some artificial factors like electric, magnetic and electro-magnetic fields can also be employed to modify organic polymer coatings [69]. Feng et al [70] controlled the airflow on the coating surface during curing to alter the defects in the coating to improve the coating anti-permeability. The airflow-modified thinner region of the coating was found to be more impermeable than the other thicker regions.…”

“…Figure 2. Schematic illustration of an airflow over an alkyd coating during curing, solvent evaporation distribution and possible micro-crack formation in the curing coating, adapted from[70].…”