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The coatings industry is very familiar with shot/grit blasting as a mechanical means of surface preparation. Over the years, operators have worked with manual and automatic blast equipment with its associated dust collection arrangements. As with every manufacturing process, operating costs are very critical in this highly competitive industry. Therefore, coaters are always on the lookout for ways to tune their process and increase productivity.
The coatings industry is very familiar with shot/grit blasting as a mechanical means of surface preparation. Over the years, operators have worked with manual and automatic blast equipment with its associated dust collection arrangements. The industry is highly competitive, and control on operating costs is critical. Therefore, coaters are always on the lookout for ways to tune their process by lowering costs and increasing productivity.
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The purpose of surface preparation is to get a required adhesion between steel and the coated film. Adhesion is a significant factor for the suitability and life of protective coatings in corrosive surroundings. In the shipbuilding industry, air blasting with round blasting nozzles is common practice for achieving the productivity and proper surface profile. Generally, the round blasting nozzle cannot evenly spread the abrasive material on a steel surface compared with a rectangular nozzle.
The role of a Coating Inspector has evolved considerably over the past few decades, and the responsibilities have increased over what used to be a rather straightforward job: to verify that surface preparation and coating application meet the project specification requirements. Today there are week-long or multi-week basic and advanced coating inspection courses, specialty courses that are industry-specific (e.g., bridge, nuclear), courses that are substrate-specific (e.g., concrete coatings inspection) and even coating-specific (e.g., inspection of thermal spray coatings).