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In this study, a new portable garnet blasting unit targets for weld joints in W.B.T. was developed. The field data clearly indicated that the potable garnet blasting method can be a valuable tool for small damaged area and weld seam in confined area with increase in the blasting productivity by 20%. In order to predict and optimize the pressure drop and air consumption in air blasting system, semi-empirical equations have been developed
Proper choice and combination of surface preparation and coating material determine the fate of the coated film especially under corrosive and sea water immersion environments. For new shipbuilding, the application of blasting surface treatment, which provides better coating performance, is practically implausible for the weld seams in Water Ballast tank (W.B.T.) due to difficulties in those confined spaces, as well as due to secondary contamination or damage of adjacent coatings. The pressing needs for most shipyards are to prepare the proper countermeasure and develop the alternative surface preparation technologies, which can improve the productivity of surface treatment process without compromising coating’s performance. In this study, a new portable garnet blasting unit targets for weld joints in W.B.T. was developed. The field data clearly indicated that the potable garnet blasting method can be a valuable tool for small damaged area and weld seam in confined area with increase in the blasting productivity by 20%. In order to predict and optimize the pressure drop and air consumption in air blasting system, semi-empirical equations have been developed.
Financial resources for maintenance of coatings systems for owners of steel bridges are at a premium. Therefore, it is imperative to prioritize and choose the scope of services for maintenance painting of these structures in the most efficient manner. This paper will present the fundamental steps necessary for a detailed condition assessment of the existing coatings of steel bridges.
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The drive to embellish and beautify our surroundings is a human motivation that bridges both culture and time. From vases to vaulted ceilings, across the globe we captivate ourselves with ornament, decorating the objects that we create, the homes we live in and the spaces in which we work and worship. Examples of decorative painting can be found from the earliest moments of man’s existence and have evolved throughout history in synchronicity with our life styles; expressing our tastes, our status, our standards and values.
Rust is caused by the influence of water, oxygen and time. Air pollution and contaminants on steel surfaces speed up the corrosion process. When corrosion is caused by condensation water, a micro-porous coating can considerably enhance traditional corrosion protection.