METHOD OF INTERNAL STRESS RELIEVING IN POLYMER COATINGS Russian patent published in 2017 - IPC H05F3/06 C21D1/30 C25D5/48 C09D11/101 

FIELD: chemistry.

SUBSTANCE: method of internal stress relieving of lacquer coatings on metallic surfaces formed by liquid coating materials - acrylic, polyurethane or pentaphtol. The method comprises impact of constant electric field formed by aeroionizational electroeffluvial unit with intensity of E= (1.2÷6)⋅10⁵ V/m on the lacquer coating at a voltage of (2-2.5)⋅10⁴ B at high-voltage generator of the unit. The distance between the electroeffluvial radiator of the unit and the lacquer coating is 0.04-0.2 m.

EFFECT: reduction of shrinkage stresses in the coating and acceleration of coating curing or drying in 1,5-2 times while maintaining the physical and mechanical properties of the coating compared to the natural conditions.

3 dwg, 4 tbl