Analysis of Key Factors in the Copper slag Blasting Process and Strategic Comparison with Other Surface Preparation Methods to Improve Painting Quality

Document Type : Research

Authors

Department of engineering, Shahrood branch, Islamic Azad university, P. O. Box:36199-43189, Shahrood, Iran.

10.30509/jscw.2025.167375.1205

Abstract

Two kinds of abrasive materials, Copper Slag and small steel shot (shot blast), are used in this research. When using copper slag blast on the surface of metals, several factors must be considered, including the distance between the nozzle and the surface of the piece, the air pressure coming out of the compressor, the operator speed, and the type and size of the abrasive. Changes in the nozzle spacing included 100 mm, 150 mm, and 200 mm in this study. The pressures included 4 bar, 5 bar, and 6 bar in this research. Also, the type of Copper Slag used in this research is 0.5 to 2 mm. The number of 9 experiments in this research was examined to obtain the best by changing the components of pressure, distance, and angle of the nozzle to the surface of the part; then we re-tested the best condition with different speeds (the speed of the user's hand movement). In this test, all samples' surface roughness was analyzed based on ISO 8503-1. The results showed all samples experienced an increase in surface roughness after the copper slag blasting process. However, the sample (pressure: 5 bar, nozzle distance: 150 mm, operator speed 180-200 mm/sec, and nozzle angle 60~75 degrees) has the best surface roughness condition. Finally, the component cleaned with copper slag blasting was compared with the one cleaned using steel shot blasting. For painting one square meter of cross-sectional area, 1.8 kg of paint was used with copper slag blasting, whereas 2.1 kg was required for steel shot blasting surface preparation. The results demonstrated that when critical factors in copper slag blasting are properly observed, it yields significantly lower paint consumption and superior paint adhesion compared to shot blasting.

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Main Subjects

References

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Journal of Studies in Color World
Volume 15, Issue 2
April 2025
Pages 137-147

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History

  • Receive Date: 25 September 2024
  • Revise Date: 22 February 2025
  • Accept Date: 22 February 2025

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