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Microstructural Evaluation of Calcareous Deposits on TSA-coated Steel Structures at Elevated Temperatures

Picture for Microstructural Evaluation of Calcareous Deposits on TSA-coated Steel Structures at Elevated Tempera
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Product Number: 51315-5949-SG
ISBN: 5949 2015 CP
Author: Shiladitya Paul
Publication Date: 2015
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As the oil and gas sector moves towards exploration of deeper and remote wells corrosion protection of conduits carrying hot fluids subsea becomes critical. TSA has been used to protect offshore structures for many years at ambient temperatures. However the melting point of aluminium and the limited corrosion rate data indicate that they are likely to perform well in such conditionsas they tend to form calcareous deposits. Nonetheless not much in known regarding the protection mechanism offered by TSA to at elevated temperatures. In particular the mechanism of calcareous deposit formation at elevated temperature is little understood. The paper reports micro-scale surface characterisation data on damaged TSA-coated carbon steel exposed to boilingseawater. The kinetic information regarding the rate of formation of calcareous deposits is also presented.
As the oil and gas sector moves towards exploration of deeper and remote wells corrosion protection of conduits carrying hot fluids subsea becomes critical. TSA has been used to protect offshore structures for many years at ambient temperatures. However the melting point of aluminium and the limited corrosion rate data indicate that they are likely to perform well in such conditionsas they tend to form calcareous deposits. Nonetheless not much in known regarding the protection mechanism offered by TSA to at elevated temperatures. In particular the mechanism of calcareous deposit formation at elevated temperature is little understood. The paper reports micro-scale surface characterisation data on damaged TSA-coated carbon steel exposed to boilingseawater. The kinetic information regarding the rate of formation of calcareous deposits is also presented.
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