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Improvement of Blasting Productivity by Optimizing Blasting-Related Operation Parameters

Improvement of Blasting Productivity by Optimizing Blasting-Related Operation Parameters
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As a means of surface preparation for protective coatings, abrasive blasting provides proper surface roughness and increases the surface area, which are critical in achieving physical and chemical adhesion between steel surface and organic coatings. For application of high-performance coating in a new shipbuilding, the abrasive blasting cleaning is widely favored primarily because of its economic and performance benefits. The abrasive blasting, however, also requires the significant amount of labor hour, whereas its efficiency mainly depends on the blaster’s skill. 

Product Number: 41207-303-SG
Author: Han-Jin Bae, Jae-Jin Baek, Chae-Suk Lee, Chil-Seok Shin, Byung-Hun Lee, Sang-Ryong Shin, Kwang-Ki Baek, Ki-Soo Kim
Publication Date: 2007
Industry: Coatings
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$20.00
$20.00

As a means of surface preparation for protective coatings, abrasive blasting provides proper surface roughness and increases the surface area, which are critical in achieving physical and chemical adhesion between steel surface and organic coatings. For application of high-performance coating in a new shipbuilding, the abrasive blasting cleaning is widely favored primarily because of its economic and performance benefits. The abrasive blasting, however, also requires the significant amount of labor hour, whereas its efficiency mainly depends on the blaster’s skill. Blasting cleaning productivity is known to be affected by a number of parameters, such as air pressure at the nozzle, air volume, abrasive/air mixing ratio, abrasive type and size, and type of nozzle used, and so on. In this study, the effects of these operating parameters are evaluated as a means to find the optimum window for blasting conditions. For this, a series of tests were conducted in the laboratory-scale blasting test facility to simulate the actual blasting practice. The results clearly indicated that the newly optimized blasting condition can improve blasting efficiency and remarkably reduce the amount of abrasive used. And also, a general trend is observed that blasting productivity is gradually increased with grit feeding rate to certain critical value, and then maintained constantly.

As a means of surface preparation for protective coatings, abrasive blasting provides proper surface roughness and increases the surface area, which are critical in achieving physical and chemical adhesion between steel surface and organic coatings. For application of high-performance coating in a new shipbuilding, the abrasive blasting cleaning is widely favored primarily because of its economic and performance benefits. The abrasive blasting, however, also requires the significant amount of labor hour, whereas its efficiency mainly depends on the blaster’s skill. Blasting cleaning productivity is known to be affected by a number of parameters, such as air pressure at the nozzle, air volume, abrasive/air mixing ratio, abrasive type and size, and type of nozzle used, and so on. In this study, the effects of these operating parameters are evaluated as a means to find the optimum window for blasting conditions. For this, a series of tests were conducted in the laboratory-scale blasting test facility to simulate the actual blasting practice. The results clearly indicated that the newly optimized blasting condition can improve blasting efficiency and remarkably reduce the amount of abrasive used. And also, a general trend is observed that blasting productivity is gradually increased with grit feeding rate to certain critical value, and then maintained constantly.

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