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Droplet and Flake Size Distribution in the Electrostatic Spraying of Metallic Paint
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English
Abstract
When compared with conventional spraying, electrostatic spraying of metallic paints is known to result in a change of color of the deposited paint film. An earlier study, by other researchers, suggested that this phenomenon is due to a difference in the flake content in the deposited paint. This paper confirms that finding for an electrostatic rotary-bell spraying system, and expands on it to determine the effect of various system operating parameters on the resulting paint droplet and flake size distribution. Parameters selected were the applied voltage, speed of rotation of the bell and the gap spacing between the sprayer and the target. The paint-sample collector, which is a high-voltage electronically-driven device, is also described. Operating parameters are found at which the droplet size and flake content are most uniform along the target surface.
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Authors
Citation
Elmoursi, A. and Lee, H., "Droplet and Flake Size Distribution in the Electrostatic Spraying of Metallic Paint," SAE Technical Paper 890354, 1989, https://doi.org/10.4271/890354.Also In
References
- Bell G. C. Hochberg J. “Mechanics of Electrostatic Atomization, Transport, and Deposition of Coatings” Proceeding of the Seventh International Conference in Organic Coating Science and Technology Athens, Greece 1981
- Inkpen Stuart L. Melcher James R. “Dominant Mechanisms for Color Differences in the Mechanical and the Electrostatic Spraying of Metallic Paints” Ind. Eng. Chem. Res. 26 1987 1645 1653
- Inkpen S. “Electrical and Mechanical Mechanisms for Color Variation in the Spraying of Metallic Paints,” MIT April 1986
- Inkpen S. Melcher J. R. Jeganathan P. K. “Electrical Induction of Patterns in Metallic Paints” Ind. Eng. Chem. Res. 27 1 1988 58 64
- VICOM Digital Image Processor Vicom Systems, Inc. San Jose, California November 1983