Abstract
The need for protective coatings in natural gas pipelines and the demand for longer life is constantly increasing. Impurities between the coating and the substrate interface, unsuitable surface preparation conditions as well as unoptimized coating process parameters limit the service life of the coating under severe operating conditions. This article presents the test results and characterization of fused bonded epoxy based (FBE, fusion bonded epoxy) coatings applied with electrostatic spray gun to protect spiral welded steel (X70M PSL2) natural gas pipes working against soil under cathodic corrosion under different environmental conditions. Many factors affecting the performance of single-layer FBE coatings include pre-coating steel surface preparation; significantly affect the performance of the coating. Experimental studies were controlled in accordance with relevant international test standards and specifications (CSA-Z245.20 series 14) and analyzed by chemical characterization methods (FTIR, SEM). As a result of the evaluation, it has been observed that FBE coatings can be produced successfully and successfully passed cathodic peeling and adhesion tests under different temperature conditions.
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