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Spot-and-Sweep' Blasting for Cost Effective Outer Hull Surface Preparation

This paper summarizes the work performed under 2011 funding from the National Shipbuilding Research Program (NSRP) Surface Preparation and Coatings Panel.

Product Number: 41213-760-SG
Author: Gordon G. Kuljian
Publication Date: 2013
Industries: Military , Coatings
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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 under NAVSEA Standard Item 009-32 (preservation). Surface preparation in the commercial arena (general cargo fleet, tankers, bulkers, and cruise liners) generally consists of repairing the system at 36–60-month intervals by removing only loose or delaminated coating, applying primer to exposed steel, adding additional anti-corrosive as needed and applying full antifouling coats. Such a practice is termed “spot-and-sweep blasting”.

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 under NAVSEA Standard Item 009-32 (preservation). Surface preparation in the commercial arena (general cargo fleet, tankers, bulkers, and cruise liners) generally consists of repairing the system at 36–60-month intervals by removing only loose or delaminated coating, applying primer to exposed steel, adding additional anti-corrosive as needed and applying full antifouling coats. Such a practice is termed “spot-and-sweep blasting”.

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