Mechanical properties of epoxy based coating materials suitable for in-situ internal application in gas/oil pipelines were studied. Coatings were applied on carbon steel substrates submitted to two different surface preparation procedures (ST3 and SA2½) and the effect from surface treatment on coating adhesion, impact, hardness and wear was evaluated. It was found that adhesion failure occurs through distinct mechanisms depending on coating material and surface preparation. Wear occurs mostly by abrasive mechanism, although adhesive wear was found to be significant in some cases also depending on material and surface. Microhardness, as expected, was found to be a coating property not unaffected by surface treatment.
Epoxy; coating; pipeline; mechanical properties
