Cortec’s CORROSION 2014 paper no. 4200, “Protection of Offshore Platform Caisson Legs with a Vapor Corrosion Inhibitor—A Case Study” by Cortec® Middle East’s Usama Jacir, Talal A. Rahman Al-Sayed, Ahmed Fathi Eid, and Mahdi Mohamed Al-Marzooqi, is featured in the “Caisson Legs on Offshore Platform Protected with a Vapor Corrosion Inhibitor” article of the June 2015 Issue of Materials Performance.
This technical paper discusses a pilot study conducted by Cortec® to evaluate the use of vapor corrosion inhibitors (VCIs) to protect the integrity of offshore platform caisson legs. The uncoated interiors of the caisson legs on a particular platform contained blasting grit, biocide-treated water, and suspended sacrificial anodes. After two decades of operation, a build-up of hydrogen gas generated by the depleted anodes inside a caisson leg led to an explosion. By spraying the internal diameter of the leg with a water-based solution containing a VCI with a biocide treatment, fogging the internal space with an amine carboxylate VCI, and hanging a string of pouches containing VCI powder to saturate the space, Cortec® provided corrosion protection that lasted beyond a year. These positive results lead to the adoption of this corrosion protection system.
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