Acceleration and quantitative evaluation of degradation for corrosion protective coatings on buried pipeline: Part II. Application to the evaluation of polyethylene and coal-tar enamel coatings

► Coating materials and its thickness affect the corrosion-protective performance. ► Polyethylene had better performance than coal-tar enamel due to its low porosity. ► Formation of denser oxide layer suppressed oxide lifting effectively. ► Thicker coating exhibited higher protective performance by increasing Roxide.