Above ground storage tanks display a large surface area that can often be covered in unsightly rust. A long-term coating is needed to reduce maintenance costs as scaffolding and tarping a tank for coating typically costs more than the actual blasting and re-painting costs. Thermal spray zinc (TSZ) duplex coatings have been shown to be highly durable. In a life cycle comparison with paint, the durability of metallic zinc coatings eliminates the repeat burdens of maintenance painting, significantly reducing the total cost of ownership of a structure. Furthermore, zinc coatings have significantly lower life cycle impact in terms of global warming potential, acidification potential, and photo-chemical ozone creation potential, providing a more sustainable corrosion maintenance strategy. A thermal spray zinc duplex coating applied with three aerial work platforms can eliminate the need for scaffolding and tarping and provide an economical and sustainable coating system with a service life typically exceeding 50 years.

Subject
Abrasive blasting, Steel structures, Zinc rich coatings, Steel surfaces, Galvanized coatings, Galvanized steel, Steel, Corrosion protection, Zinc, Maintenance, Barrier coatings, Paints, Thermal spray coatings
Keywords:
Thermal sprayed zinc, duplex coatings, corrosion
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2022
Association for Materials Protection and Performance (AMPP)
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