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Degradation of Liquid Epoxy Resins at High Temperatures

Product Number: 51314-3650-SG
ISBN: 3650 2014 CP
Author: Carlos Fernandez
Publication Date: 2014
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In the oil fields of North District in Venezuela one of the common characteristics is the high temperatures of the oil ( up to 150 °C) that have a direct impact in the performance of the pipeline’s coating. Internal and external corrosion are the common problems in the performance of these flowline systems. In the past 10 years one solution used to mitigate the external corrosion in the pipelines has been with the use of liquid epoxy resins as external coating. Nevertheless beside the use of liquid epoxy coatings very few is known however about the degradation of these coatings at high temperatures. The main purpose of this paper is to present some results of thermal and thermo-oxidative ageing of four different types of liquids coatings systems (A B C and D). For this evaluation were prepared coupons of carbon steel coated with all the organic coating systems. Differential scanning calorimetry (DSC) test Aging test Thermogravimetric analysis (TGA) Furrier transform infrared spectroscopy (FTIR) measurements Scanning electron microscopy (SEM) and Cathodic disbondment test (CDT) were performed in order to classify the thermal degradation of the coating systems. Results show an influence of the aging conditions on the coating embrittlement. KEYWORDS: Organic Coating High Temperature Liquid resins Degradation Thermo-oxidative.
In the oil fields of North District in Venezuela one of the common characteristics is the high temperatures of the oil ( up to 150 °C) that have a direct impact in the performance of the pipeline’s coating. Internal and external corrosion are the common problems in the performance of these flowline systems. In the past 10 years one solution used to mitigate the external corrosion in the pipelines has been with the use of liquid epoxy resins as external coating. Nevertheless beside the use of liquid epoxy coatings very few is known however about the degradation of these coatings at high temperatures. The main purpose of this paper is to present some results of thermal and thermo-oxidative ageing of four different types of liquids coatings systems (A B C and D). For this evaluation were prepared coupons of carbon steel coated with all the organic coating systems. Differential scanning calorimetry (DSC) test Aging test Thermogravimetric analysis (TGA) Furrier transform infrared spectroscopy (FTIR) measurements Scanning electron microscopy (SEM) and Cathodic disbondment test (CDT) were performed in order to classify the thermal degradation of the coating systems. Results show an influence of the aging conditions on the coating embrittlement. KEYWORDS: Organic Coating High Temperature Liquid resins Degradation Thermo-oxidative.
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