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98404 CORROSION PROFILE IN A GAS SWEETENING PLANT

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Product Number: 51300-98404-SG
ISBN: 98404 1998 CP
Author: B. Luciani, R. Case, A. Viloria
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A study was performed to assess the corrosion rate in a gas sweetening plant using electrochemical methods. The tests were performed by using samples of the amine in service. Coupons made of A- 106 carbon steel were tested, as this material is tipically used in most vessels. The variables studied included the actual temperature of different plant units at both rich ad lean amine conditions, and the degree of C02 saturation. The results show an increase of the uniform corrosion rate with temperature, which reflects the effect of heat stable salts in the corrosivity of the amine evaluated. Also, from the analysis of the potentiodynamic carves at different conditions, the risk for Alkaline Stress Corrosion Cracking (ASCC) was assessed. The association of this risk with actual plant conditions shows which vessels are susceptible to both amine corrosion and ASCC which allowed to develop a corrosion profile for both the lean and rich amine parts of the circuit, Keywords: amine corrosion, gas sweetening, electrochemical methodologies
A study was performed to assess the corrosion rate in a gas sweetening plant using electrochemical methods. The tests were performed by using samples of the amine in service. Coupons made of A- 106 carbon steel were tested, as this material is tipically used in most vessels. The variables studied included the actual temperature of different plant units at both rich ad lean amine conditions, and the degree of C02 saturation. The results show an increase of the uniform corrosion rate with temperature, which reflects the effect of heat stable salts in the corrosivity of the amine evaluated. Also, from the analysis of the potentiodynamic carves at different conditions, the risk for Alkaline Stress Corrosion Cracking (ASCC) was assessed. The association of this risk with actual plant conditions shows which vessels are susceptible to both amine corrosion and ASCC which allowed to develop a corrosion profile for both the lean and rich amine parts of the circuit, Keywords: amine corrosion, gas sweetening, electrochemical methodologies
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