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A Study on Improving Surface Preparation Productivity Using Rectangular Blasting Nozzle

A Study on Improving Surface Preparation Productivity Using Rectangular Blasting Nozzle
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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.

Product Number: 41216-980-SG
Author: ChangHun Lee, ByeongHun Do, WonJun Yun, HanJin Bae
Publication Date: 2016
Industries: Coatings , Coatings and Linings
$0.00
$20.00
$20.00

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. This study focuses on the use of rectangular nozzles to achieve increased surface preparation productivity by avoiding the concentrations of abrasive material typically seen with round nozzles. Rectangular nozzles can spread the abrasive materials evenly due to the shape of the nozzle. The rectangular nozzle, which has the same sectional area ratio as the round nozzle, is made with SKD-11. Two kinds of nozzles are compared in productivity and quality. Abrasive speed and spreading angle are compared using pictures captured by a high-speed camera during field production trials. Surface condition and profile are compared by microscope and surface roughness measuring instruments in the field of quality.

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. This study focuses on the use of rectangular nozzles to achieve increased surface preparation productivity by avoiding the concentrations of abrasive material typically seen with round nozzles. Rectangular nozzles can spread the abrasive materials evenly due to the shape of the nozzle. The rectangular nozzle, which has the same sectional area ratio as the round nozzle, is made with SKD-11. Two kinds of nozzles are compared in productivity and quality. Abrasive speed and spreading angle are compared using pictures captured by a high-speed camera during field production trials. Surface condition and profile are compared by microscope and surface roughness measuring instruments in the field of quality.

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