Comparison of Coatings Adhesion Performances for Buried SS316L Pipelines

Six polymeric coatings viz. 3LPE, 3p/2p CAT, PU, VE, LE and HSS have been selected each type of coating has applied separately on SS316L pipe external surface. The test samples subjected to adhesion tests by the peel strength pull-off methods, before after Hot Water Immersion (HWI) for 100 days. After completing test, values are found about 10.9, 1.8, 0.35, 6.8 N/mm respectively, whereas 10.77, 22.7 N/mm2 respectively. experimental results analysed, performances compared based dimensionless number termed as “Coating Bond Index” in this study. relative rankings these evaluated determining suitability buried pipelines petroleum, petrochemical natural gas industries.