Julie Holmquist (USA), Khalil Abed(UAE) and Philip Horsford (Southeast Asia), Cortec Corporation, explain how volatile corrosion inhibitors quite literally fill significant gaps in the standard cathodic protection system. Cathodic protection (CP) is well-established as the main method of soil-side corrosion mitigation on aboveground storage tanks (ASTs), according to API 651 and other standards. It is also commonly used to protect underground pipelines. However, it is well known that CP is only effective in areas where the structure to be protected is in direct contact with a conductive electrolyte. Loss of such direct contact leaves gaps in the protection system of cased pipeline crossings and floor-to-soil interfaces on AST bottoms. CorroLogic VpCI Technology developed by Cortec Corporation, US, and distributed by regional providers such as Cortec Middle East and Cortec Southeast Asia, provides a practical complementary method of corrosion protection with significant potential for cost savings and greater asset integrity assurance for asset owners.
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