The current U.S. Navy underwater hull surface preparation strategy is to completely remove the coating systems after an 8-year service life. This is accomplished through abrasive blasting or ultra-high water-jetting (UHPWJ) and is the only strategy approved by NAVSEA. This paper presents an alternate cost savings alternative, spot-and sweep blasting, where well adherent coating is retained. An economic analysis is also presented. Work was performed under a grant from the National Shipbuilding Research Program, Surface Preparation and Coatings Committee.

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