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Case study for anode grid systems. used for Cathodic Protection of above ground storage tank bottom plates. Technical solutions for arranging the anode grid on large (90 m diameter) tanks are studied and compared in respect to the CP major objective.
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This work evaluated chemical and electrical stability of commercially reference electrodes in contact with sand treated with vapor-phase corrosion inhibitors (VCIs). Several types of electrodes were tested, including Cu/CuSO4, bentonite-clay clad Cu/CuSO4, and bentonite-clay clad Zn/ZnSO4.
Conclusions: (1) vapor corrosion inhibitors (VCIs) can control corrosion on steel materials in contact with AST tank bottom backfill. (2) Efficiency of VCIs is affected by salt contamination or impurities in the backfill. (3) Corrosion of small areas of steel are not indicative of corrosion AST tank bottoms. (4) A path forward.
Laboratory experiments to evaluate the mutual compatibility and interactions between a particular amine carboxylate based inhibitor and cathodic protection.