Corrosion is defined as the gradual degradation of materials as a result of reaction with their environment, and corrosion inhibition is the systematic procedure of preventing or treating the effects of corrosion on metals. Due to the continued growth in hydrocarbon demand, operators in the oil and gas industry are always looking to drill deeper wells in order to access previously unattainable hydrocarbons. High-Pressure High-Temperature (HPHT) wells are now broadly present in places like the Gulf of Mexico, the North Sea, and the Middle East. These extreme conditions bring new challenges for corrosion inhibition. This paper is a review of corrosion encountered in the oil and gas industry, its cost and impact, the mechanisms/types of corrosion faced, and the current methods used to minimize, control, and monitor corrosion.

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