Multi-layer structures are used which combine the corrosion resistance of an epoxy primary coat with the mechanical resistance of a polyolefin (MDPE, HDPE or PP) outer layer.
External three layer coating (epoxy / tie-layer / HDPE or PP) are widely used as external corrosion protection of steel pipes for gas or crude oil transportation.
First layer : Epoxy primer for corrosion protection
Intermediate layer : tie-layer for cohesion of the whole system
Third layer : Polyolefin top coat for mechanical protection
All rights reserved research firm Industrial KARANGIN