51313-02461-Electrochemical Characterization of Steel w/Active and Passive Induced Interface in CO2 Conditions

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Product Number: 51313-02461-SG

ISBN: 02461 2013 CP

Author: Ahmad Ivan Karayan

Publication Date: 2013

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Low carbon steels have been used for pipeline carrying oil and natural gas in low to wet medium CO2 services due to cost effective reasons. The steel/electrolyte interface produces different transport and exchange mechanisms due to natural evolution; one active process is the corrosion rate this later can be stable when FeCO3 passive film is formed on the metal surface. In certain conditions the breakdown of this passive film by chemical influence could initiate localized corrosion such as pitting corrosion and mesa attack which then lead to the premature failure. The most common corrosion control action for metallic dissolution in pipelines is the chemical inhibitor. This research aims to study the influence of green inhibitors on the interfacial mechanisms occurring when the film is present and the breakdown occurs. The corrosion behavior of mild steel in this enviroment will be characterized by electrochemical time and frequency domain methods and weight loss method. The influence of chemical action on two forms of FeCO3 passive film stability will be characterized by the Optical microscope SEM and XPS to study how the fluid velocity chloride and electrolyte influence the localized corrosion morphology and the nature of passive film composition.