Adhesion failure of external 3 layer extruded polyethylene (3 LPE) based coatings for gas/oil transmission pipelines buried under soil (English)

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Various analytical techniques are reported in this paper to assess the role of 3 LPE coatings' corrosion protection with special emphasis on the FBE (Fusion Bonded Epoxy)-substrate interface for gas/oil transmission pipelines buried under soil. FTIR, DSC, TGA, DMA have proved useful in determining the dimensional strength of the FBE coating. However, ToFSIMS has proved exceptionally useful in elucidating the detrimental effect of contamination like oil, grease and silicone etc at the FBE/steel-substrate interface on the coating disbondment. Our investigations strongly suggest that one of the most important factors - if not the most important - influencing the service lifetime of a 3 LPE coated pipeline lies in the steel surface preparation and reduction of residual contamination. A maximum care of the interface FBE/steel should minimize the need for cathodic protection (CP). A fair amount of information could be acquired with the help of analytical techniques employed so far. This basic study is to be considered as a starting point for a comprehensive/experimental insight into the FBE material performance with respect to its scope and limits. It is always desirable to compare 2-3 different FBE materials so that one can select the best available material as a pipeline coating. Although major characteristics of the two FBE materials are fairly similar, one can still see the fingerprints of each FBE-supplier. A neutral observer would prefer the material B based on our investigations. To conclude, it can be said of the investigated FBE materials that: Chlorine content: ionic chlorine contamination in particular, is too high for sample A and needs to be lowered considerably lor better corrosion protection due to the coating. A faster curing FBE is desirable by the manufacturer, even if it means that the shelf-life of the FBE is reduced. Cure at 'lower' temperature normally implies 'lower stress concentration' due to cure reaction.

Table of contents conference proceedings

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Residual stresses in 3LPO external pipeline coatings - disbondment and cracking
Chang, B.T.A. / Hung-jue, S. / Han, J. / Wong, D. / Kehr, A. / Mallozzi, M. / Aguirre, F. / Snider, W. / BHR Group Limited | 2009
A new application process that assures good adhesion of fusion bonded epoxy coating exposed to very severe conditions
Gaillard, G. / Bouliez, J.L. / BHR Group Limited | 2009
Adhesion failure of external 3 layer extruded polyethylene (3LPE) based coatings for gas/oil transmission pipelines buried under soil
Hussain, A. / Pflugbeil, C. / BHR Group Limited | 2009
Development and performance of a low application temperature FBE coating
Pratt, J.K. / Mallozzi, M.L. / BHR Group Limited | 2009
Design of Mid. Tg FBE powder coatings to meet the requirements of pipe coaters and pipeline owners
Patterson, M. / Drew, S. / Boerschel, V. / BHR Group Limited | 2009
Rheokinetic modeling of fusion bonded epoxy powder coatings at standard and low application temperature
Shafi, M.A. / Aguirre, F. / Trottier, E. / Falcone-Potts, S. / BHR Group Limited | 2009
PNC: A new solution for offshore field joint coatings
Mallozzi, M. / Perez, M. / BHR Group Limited | 2009
Novel field joint coating solutions for the construction of subsea pipelines
Tailor, D. / Tacoma, E. / BHR Group Limited | 2009
Pipeline rehabilitation for the 21st century
Bond, T.J.M. / Miles, D.J. / Burke, R.N. / Venero, N.J. / BHR Group Limited | 2009
The impact of logistic operations on coatings in the supply chain of pipelines
van Assema, I.M. / BHR Group Limited | 2009
Rapid hardening concrete cloth for oil, gas and water pipeline protection applications
Orr-Adams, F.A. / Brewin, P. / Hiam, E. / BHR Group Limited | 2009
Dow products for 3LPE steel pipe coating - AMPLIFY™ GR 320 and HDPE 12110G
Henschke, O. / BHR Group Limited | 2009
Rehabilitation of corrosion protective coatings on buried steel pipelines
Schad, M. / Stroter, C. / Rehberg, T. / BHR Group Limited | 2009
The challenge - renovation project in new dimensions: the renewal of the anti-corrosion protection of the hydropower station at Wehr, Germany
Zwanzinger, A. / Rainer, E. / Huber, T. / BHR Group Limited | 2009
Foamed cement mortar to protect coated steel pipelines from external acid attack
Trebicki, D.D.P. / BHR Group Limited | 2009