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51318-11230-Evaluating Cost-Effectiveness of Water Infrastructure Corrosion Control Methods

This paper demonstrates a spreadsheet tool developed to evaluate life-cycle costs for specific cases using economic principles and professionally developed cost estimates.

Product Number: 51318-11230-SG
Author: Jessica D. Torrey / Todd Gaston / Bobbi Jo E. Merten c
Publication Date: 2018
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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.

Key words: Cost of corrosion control, life-cycle cost, water infrastructure, protective coatings, cathodic protection, hydraulic steel gates

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.

Key words: Cost of corrosion control, life-cycle cost, water infrastructure, protective coatings, cathodic protection, hydraulic steel gates

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