Converting Process:

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

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