Experimental Study on Electrostatic Spark Ignitability of Coating Polymer Powders in Electric Field with Corona Discharge

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概要

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• This paper is a report of the ignitability of coating polymer powders due to an electrostatic spark in an electric field with a corona discharge. The ultrasonic vibration-type apparatus for measuring the ignitability of an electrostatic spark of coating polymer powders was used in this study. The dust concentration in all tests was always 0.60 kg/m3. Polyester powder with grains of 32 μm used in practical electrostatic powder-coating plants was employed as the powder material. The corona discharger, which was located in the explosion chamber, was controllable in the range of DC 5 to 8 kV (bipolar). As a result, the ignitability of coating polymer powders was confirmed to decrease in an electric field created by corona discharge. The reduction was dependent on the voltage applied to the wire electrode of the corona discharger. This result was attributed to the changes in the dispersion of the powder and the free ions produced by the corona discharge. Therefore, the influence of the corona discharge must be considered in the minimum ignition energies of powder paints when using electrostatic powder coating systems.

• Published by the Japan Society of Applied Physics through the Institute of Pure and Applied Physicsの論文
• 2006-06-15

著者

• Moon Kyoon-tae

  Seoul National University Of Technology Department Of Safety Engineering

• Joung Jae-hee

  Seoul National University Of Technology Department Of Safety Engineering

• Yamaguma Mizuki

  Independent Administrative Institution Japan National Institute Of Occupational Safety And Health

• Choi Kwang-seok

  Independent Administrative Institution National Institute Of Industrial Safety

• Choi Kwang-Seok

  Independent Administrative Institution, National Institute of Industrial Safety, 1-4-6 Umezono, Kiyose, Tokyo 204-0024, Japan

• Moon Kyoon-Tae

  Seoul National University of Technology, Department of Safety Engineering, 172, Gongreung-dong, Nowon-gu, Seoul 139, Korea

• Joung Jae-Hee

  Seoul National University of Technology, Department of Safety Engineering, 172, Gongreung-dong, Nowon-gu, Seoul 139, Korea

関連論文

• Experimental Study on Electrostatic Spark Ignitability of Coating Polymer Powders in Electric Field with Corona Discharge
• Electric Spark Ignition Eneries of Coating Polymer Powders
• Ignitability of sprayed liquids due to an electrostatic spark
• Experimental Study on Safe Performance of Nozzle-Type Electrostatic Neutralizer
• Experimental Study on Electrostatic Spark Ignitability of Coating Polymer Powders in Electric Field with Corona Discharge

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