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09046 Performance of External Pipeline Coatings in Low Temperature Conditions

Picture for 09046 Performance of External Pipeline Coatings in Low Temperature Conditions
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Product Number: 51300-09046-SG
ISBN: 09046 2009 CP
Author: Robert Denzine, Mark Yunovich and Colin S. Scott
Publication Date: 2009
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$20.00
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There is a tacit concern in the oil and gas industry regarding hazards of excessive cathodic protection (CP) on pipelines. Research has shown that at ambient temperatures, overprotection may lead to cathodic disbondment (CD) of external coatings. The relationship between pipeline CD and CP overprotection at low temperatures was investigated by employing CD tests on fusion-bonded epoxy (FBE)-coated samples in either soil or salt solutions, subjected to different potentials, and subjected to freeze only or freeze/thaw cycles. The study has highlighted both beneficial and detrimental effects of low temperatures; it has been demonstrated that freeze / thaw cycles can exacerbate coating disbondment. While the preliminary results indicated that, in order to reduce the risk of CD, maximum applied CP level should be approximately -1050 mV (CSE), the testing was not extensive enough to consider this as fixed criterion for design of systems.

Keywords: cathodic protection, overprotection, disbondment, arctic, low temperature, fusion bonded epoxy (FBE)
There is a tacit concern in the oil and gas industry regarding hazards of excessive cathodic protection (CP) on pipelines. Research has shown that at ambient temperatures, overprotection may lead to cathodic disbondment (CD) of external coatings. The relationship between pipeline CD and CP overprotection at low temperatures was investigated by employing CD tests on fusion-bonded epoxy (FBE)-coated samples in either soil or salt solutions, subjected to different potentials, and subjected to freeze only or freeze/thaw cycles. The study has highlighted both beneficial and detrimental effects of low temperatures; it has been demonstrated that freeze / thaw cycles can exacerbate coating disbondment. While the preliminary results indicated that, in order to reduce the risk of CD, maximum applied CP level should be approximately -1050 mV (CSE), the testing was not extensive enough to consider this as fixed criterion for design of systems.

Keywords: cathodic protection, overprotection, disbondment, arctic, low temperature, fusion bonded epoxy (FBE)
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09041 Development of a Low Application Temperature FBE Coating

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51317--9602-Fitness for Purpose of Low Temperature Cure Liquid-Applied Coating Systems for Pipeline Maintenance

Product Number: 51317--9602-SG
ISBN: 9602 2017 CP
Author: Haralampos Tsaprailis
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Fitness for purpose of low temperature cure liquid-applied coating systems for pipeline maintenance and repair. Potential revisions to incorporate low temperature cure liquid-applied coating products into Table 1 of CSA Z245.30-14 will be presented along with commentary related to the deviations from the standard.

 
Picture for 11036 Low Temperature Mechanical Properties of Passive Fire Protective Coatings
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11036 Low Temperature Mechanical Properties of Passive Fire Protective Coatings

Product Number: 51300-11036-SG
ISBN: 2011 11036 CP
Author: Paul P. Greigger and Jonathan M. Hills
Publication Date: 2011
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This paper explores room temperature and low temperature properties of epoxy intumescent PFP coatings. Tensile properties and adhesion values down to –40°C were measured and will be discussed. Comparison between flexible, tough PFP coatings and hard, brittle PFP coatings will be presented.

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