Evaluation of Protective Coatings
Is Reclamation using the best coatings for corrosion protection?
Need and Benefit
Using the highest performance coating systems will reduce the maintenance and downtime of the structure, thus increasing water availability and reducing maintenance costs. Most coatings jobs in Reclamation cost between $1 million and $20 million. Typically, we are seeing about 30-40 jobs per year. All of the projects need direction as to what coatings to use for corrosion protection. There are still a lot of materials that need to be evaluated to find the best products.
It is vital to continue coatings evaluations and find solutions to difficult corrosion and coatings problems. Reclamation has a lot of future maintenance, and it is important to find and use products that will obtain the longest service life to reduce the cost of maintenance while meeting all volatile organic compound/chemical (VOC) limits and health and safety issues. For example, Flatiron penstocks are being recoated and relined during fiscal years 2010-2012; the cost to recoat and reline is about $20 million. We were able to convince the project managers to change to a more durable coating because we had data to back up the product. If the wrong products were selected, it could be the difference between a 15-year service life and a 30-year service life. The cost of a job is not in the coating material but in the mobility, containment, blasting, and labor costs. Usually, the coating material is less than 15% of any job, but selection of the wrong material will result in shorter service lives.
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This information was last updated on June 18, 2013
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