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Most companies involved in abrasive blasting are familiar with this iconic illustration, which shows the components of an abrasive-blast equipment set up. In this article, the Occupational Safety and Health Administration (OSHA) regulations pertaining to each component are given.
Most companies involved in abrasive blasting are familiar with this iconic illustration, which shows the components of an abrasive-blast equipment set up. In this article, the Occupational Safety and Health Administration (OSHA) regulations pertaining to each component are given. More than 40 references to hazards associated with abrasive blasting and coating operations appear in Title 29 of the Code of Federal Regulations published by OSHA. These references relate to pressure vessels, electrical classification, personal protective equipment (PPE), hazardous substances, and more. The Environmental Protection Agency (EPA) uses Title 40 of the Code of Federal Regulations to set standards for how contractors must control air emissions and solid waste generated during surface preparation and coating operations. Title 49 of the Code of Federal Regulations states the requirements of the Department of Transportation for control activities on public highways.
The creepage of corrosion underneath a coatings film applied to a steel test panel is often used as a performance test for the anti-corrosion properties of a coating system. Underfilm corrosion creep, also sometimes referred as scribe creep in the laboratory environment, is defined as the degree of corrosion emanating away from a scribe line underneath a coating film applied to a steel substrate.
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Mineral abrasives such as glass bead and aluminum oxide have been traditionally used in the surface finishing industry. The general perception is that they offer acceptable cleaning at a low operating cost. Often dismissed is the potential of metallic alternatives that though seemingly higher in initial procurement cost, offer several differentiating advantages in terms of recyclability, consistency of finish, repeatable results and ultimately resulting in overall, reduced operating costs.
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.