Abstract

The paper describes an application of cathodic protection using linear anodes in a congested petrochemical plant in the Middle East. The initial design of the cathodic protection is discussed along with the problems found due to faulty isolating flanges and loss of current to other structures. Computer modelling of a typical electrically continuous cathode including steel in concrete and earth rods is included to demonstrate the need to consider all components of complex structures. Lessons learnt from this case study are applicable for the application of cathodic protection in plant using distributed anodes.

Keywords:
pipeline corrosion, riser corrosion, criteria, materials and corrosion, h2s management, calculation, corrosion inhibition, oilfield chemistry, corrosion management, publication division
Subjects:
Production Chemistry, Metallurgy and Biology, Pipelines, Flowlines and Risers, Materials and corrosion, Corrosion inhibition and management (including H2S and CO2)
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2015. NACE International
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