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00759 LIFE PREDICTION OF HIGH TEMPERATURE COATINGS BY ELECTROCHEMICAL IMPEDANCE SPECTROSCOPY

Picture for 00759 LIFE PREDICTION OF HIGH TEMPERATURE
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Product Number: 51300-00759-SG
ISBN: 00759 2000 CP
Author: Yahya T. Al-Janabi, Abdulmunim M. AI-Ramis, Hilal M. AI-Mutairi, Abduljalil H. AI-Rasheed and All A.
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Coatings designed for high temperature, underground applications were studied using Electrochemical Impedance Spectroscopy. The study involved testing the following coating systems: a two-layer fusion bonded epoxy, a single-layer fusion bonded epoxy, a two-layer tape wrapped polyethylene and a three-layer tape wrapped polypropylene. The performance of these coating systems was evaluated as a function of time at six temperatures: room temperature, 180, 210, 230, 250 and 270°F, with the coatings being continuously immersed in highly saline solution. In general, under the test conditions, the total impedance for the two-layer fusion bonded epoxy coating system assumed higher values for longer times than the single-layer fusion bonded epoxy coating system. The results for the two-layer tape wrapped polyethylene and the three-layer tape wrapped polypropylene coating systems will be published subsequently. Keywords: pipeline coatings, organic coatings, fusion bonded epoxy coatings, electrochemical impedance spectroscopy, life prediction, high temperature coatings
Coatings designed for high temperature, underground applications were studied using Electrochemical Impedance Spectroscopy. The study involved testing the following coating systems: a two-layer fusion bonded epoxy, a single-layer fusion bonded epoxy, a two-layer tape wrapped polyethylene and a three-layer tape wrapped polypropylene. The performance of these coating systems was evaluated as a function of time at six temperatures: room temperature, 180, 210, 230, 250 and 270°F, with the coatings being continuously immersed in highly saline solution. In general, under the test conditions, the total impedance for the two-layer fusion bonded epoxy coating system assumed higher values for longer times than the single-layer fusion bonded epoxy coating system. The results for the two-layer tape wrapped polyethylene and the three-layer tape wrapped polypropylene coating systems will be published subsequently. Keywords: pipeline coatings, organic coatings, fusion bonded epoxy coatings, electrochemical impedance spectroscopy, life prediction, high temperature coatings
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