Widespread corrosion affecting rigs, platforms, flare columns, pipes, etc. in extraction and transport of crudes (sweet and sour gas/oil) is well documented. Of these the highest corrosivity can be attributed to Hydrogen Sulphide (H2S) alone or in combination with CO2 and other effluents. Microbial attack (MIC) is a contributing factor. Hydrogen embrittlement and stress cracking, and sulfidic stress corrosion and other related corrosion failures are commonplace. Refinery infrastructure is also affected by naphthenic, HCl and other acids, chlorides in aqueous phase etc. Cathodic protection (CP) is resorted to where possible being restrictive and expensive to deploy. Various types of corrosion inhibitors are also used in oil extraction but with limited success. 

METGUARD coatings can eliminate use of corrosion inhibitors which often pollute aquatic streams, and can hugely supplement CP with significant reduction in energy and material expenditure in its implementation.