COMBINED METHODS FOR EXTERNAL PROTECTION OF THERMALLY STRESSED SURFACES

摘要

The feasibility of protecting thermally stressed surfaces of gas-transfer units with heat-resistance polyimide paint materials with mineral fillers is explored. Properties of polyimide paint materials containing different fillers are compared. It is demonstrated that of the compositions examined, a paint material based on a PI-LK-2 paint with the addition of 5-10 wt. % of kaolin, and one based on a PI-LK-1 paint with the addition of 5 wt.% of a chopped basaltic fiber afford the best thermal stability.