The cost of corrosion control for water infrastructure continues to escalate, making data-based corrosion management even more important for budget planning. This paper demonstrates a spreadsheet tool developed to evaluate life-cycle costs for specific cases using economic principles and professionally developed cost estimates. It is a follow-up to the CORROSION 2017 paper evaluating the cost of protective coatings options for penstock relinings. The new work focuses on the cost-effectiveness of including cathodic protection (CP) in conjunction with protective coatings. The output includes the break-even point at which the CP system investment is justified by the extended service life of the coating system. The case study is a large gate in freshwater protected by an epoxy coating and compares the coating service life when paired with a galvanic anode CP system, an impressed current CP system, or no CP system.

Subject
Steel structures, Costs, Coating inspection, Water, Coatings, Impressed current cathodic protection, Recoating, Installation, Coating service life, Corrosion protection, Maintenance, Coating systems, Anodes
Keywords:
Cost of corrosion control, life-cycle cost, water infrastructure, protective coatings, cathodic protection, hydraulic steel gates
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2018
Association for Materials Protection and Performance (AMPP)
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