Tank Bottom Corrosion Control Monitoring for Materials Technology & Energy Section

SRNL has an ongoing a project funded by Pipeline Research Council International, Inc. The project involves understanding role of various monitoring methods in integrity management of Aboveground Storage Tank (AST). ASTs are widely used in the oil and gas transmission industry for storing crude oil and related products. The tanks are constructed using A36 grade carbon steel, and tank foundation are made of sand pads. Overtime the tank bottoms corrode; the corrosion could cause failure of the tank bottom, resulting in leakage of the stored material. The tank bottoms are most commonly protected by cathodic protection (CP) systems. Because of uneven CP current distribution, some portions of a large tank may remain under-protected and result in extensive corrosion of the tank bottom. This project will involve collection of large- scale data related to the tank bottom corrosion control monitoring; the data will be in form of floor inspection reports and mass-loss coupons and CP inspection reports. The project will involve developing corrosion maps and estimating effectiveness of various corrosion monitoring tools. In addition, the project will involve determining dispersion range of the vapor corrosion inhibitors (VCIs), and reinjection intervals of the VCIs.