TY  - JOUR
T1  - A study on the measurement of charge and surface potential of charged liquid droplets in spray painting
A1  - Jin, Rito
A1  - Kurihara, Yuta
A1  - Daikoku, Masatoshi
A1  - Shirota, Minori
A1  - Miyagawa, Taimei
A1  - Okabe, Takahiro
A1  - Matsukawa, Yoshiya
A1  - Aoki, Hideyuki
A1  - Saito, Yasuhiro
A1  - Fukuno, Junichi
Y1  - 2025///
KW  - Charge
KW  - surface potential
KW  - liquid droplets
KW  - spray painting
JF  - International Journal of Plasma Environmental Science and Technology
VL  - 19
IS  - 2
SP  - e02012
EP  - e02012
DO  - https://doi.org/10.34343/ijpest.2025.19.e02012
UR  - http://ijpest.com/Contents/19/2/e02012.html
N2  - The charge and surface potential of liquid droplets falling from a nozzle were measured in order to clarify the charging and discharging properties of droplets formed under an applied voltage during automotive spray painting. The charge per droplet was found to initially increase with increasing voltage regardless of the test liquid used but then began to decrease due to a reduction in droplet size, the generation of satellite droplets, and electrical discharging. The ‘electrical surface tension’ was also determined and was found to be nondimensionally correlated with the surface charge density. The surface potential for moving droplets, stationary metallic disks, and spheres was measured using an electrostatic sensor, whose principles were applied in an attempt to correct the displayed values based on the size of the droplets. A regression analysis was also used to correct the displayed surface potentials. It was found that accurate measurement of the surface potential may be possible even for small particles.
ER  -