Numerical investigation of coarse powder and air flow in an electrostatic powder coating process

Shah, Umang V.; Zhu, Jesse; Zhang, C.; Senior, J.H. Nother

doi:10.1016/j.powtec.2006.02.002

Cited by 21 publications

(11 citation statements)

References 16 publications

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“…He stated that thermosetting powder is used in electrostatic spraying system with maximum particle size about 75 µm and thermoplastic used in the fluidized-bed-coating process with heavier particle size of the powder which is below 44 µm. 7) Shah et al (2006) this paper carried out on the study of the coarse powder and air flow. It about the particle flow behavior in the powder coating booth & its coating quality under certain conditions.…”

Section: IImentioning

confidence: 99%

Improvement in the Production of Powder Coating Process of Fan Blades through PDCA

Pal¹

2017

IJRASET

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Plan-Do-Check-Act (PDCA) cycle is a spiral iterative scientific approach for achieving continuous improvement of quality whether in the process, product or service in any organization. This is paper review on the PDCA approach which throw some light on this topic which help us to understand how PDCA cycle can be implement and what kind of benefits can be achieved by adopting it. PDCA is problem solving technique which helps to improve the reliability and quality of the production. This method is followed by most of the Indian companies in order to maintain and improve their stake in the market and within the company processes for their success.

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Section: IImentioning

confidence: 99%

Improvement in the Production of Powder Coating Process of Fan Blades through PDCA

Pal¹

2017

IJRASET

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“…The maximum transfer efficiency for the spraying distances of 6 to 12 inches was achieved when using 100 kV. At the 3-inch distance between the gun and part, the maximum transfer efficiency was reached at 60 kV [13,14].…”

Section: Effects Of the Spray Distance To The Powder Fpte And Coatingmentioning

confidence: 99%

“…Maximum transfer efficiency for the spraying distances of 6 to 12 inches was achieved when using 100 kV. At the 3-inch distance between the gun and part, the maximum transfer efficiency was reached at 60 kV [12][13][14]. The methods of coating powder are fluidized-bed coating, electrostatic fluidized-bed coating and electrostatic spray coating [15][16][17].…”

Section: Introductionmentioning

confidence: 99%

Investigation of Epoxy Powder Coated Galvanized Steel Substrate Through Electrostatic Powder Coating System

Ahmad¹,

Ajer²

2015

Int. J. Automot. Mech. Eng.

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This research deals with the optimization of an electrostatic powder coating by optimizing the combination of total volume of air with the powder output. Generally, the coating's thickness and uniformity are not at the optimum level. A thicker coating does not necessarily provide a good surface quality. This phenomenon is caused by the insufficient volume of air to support the powder reaching the workpiece. Furthermore, too much air also causes the air to blow off the powder on the workpiece. This research aims to identify the optimum combinations of variable parameters to produce the optimum thickness with the best quality by improving the transfer efficiency and specifically to minimize the amount of powder usage. The evaluation methods used to determine the level of coating quality were thickness measurement, Buchholz indentation test, cross-cut test, color visual and surface structure analysis. The instruments used to evaluate the testing samples were a coating thickness gauge, Buchholz indentor, multi-blade cutting tools, spectrophotometer and Scanning Electron Microscope. The optimum level was found when using the optimum combination of powder output and total air volume, which produced a complete single layer of coating film, having good quality in terms of thickness, adhesion, uniformity, indentation resistance and surface structure.

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“…At the spray gun exit, charged particles repel each other, and spread evenly [2] on the object which is oppositely charged or grounded. The electrostatic attraction between the powder particles and the object allows the powder to adhere to the surface, forming an even coating [3,4]. The application of the electrostatic powder coating is followed by a high-temperature curing process, which provides a smoothly-coated surface.…”

Section: Introductionmentioning

confidence: 99%

“…The application of the electrostatic powder coating is followed by a high-temperature curing process, which provides a smoothly-coated surface. The powder is charged using either a corona or tribo-charging spray gun [3]. In the case of corona-charging, the powder particles pass through an ion-rich area and become charged based on their permittivity.…”

Section: Introductionmentioning

confidence: 99%

Experimental Evaluation of Polyester and Epoxy–Polyester Powder Coatings in Aggressive Media

et al. 2018

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Protective coatings are the most widely used corrosion protection method for construction materials in different environmental conditions. They isolate metals from aggressive media, making the structure more durable. Today, alongside good anti-corrosive properties, coatings need to be safe for the environment and harmless to those who apply them. The high volatile organic compound (VOC) content in conventional solvent-borne coatings presents a huge ecological problem. A solution for indispensable solvent emission reduction is the application of powder coatings. This study evaluates the corrosion performance and surface morphology of polyester and epoxy-polyester powder coatings. Electrochemical impedance spectroscopy (EIS), open circuit potential (OCP) measurement, salt spray chamber and humidity chamber testing followed by adhesion testing were used to investigate the protective properties of powder coatings. Scanning electron microscope (SEM) with energy-dispersive X-ray spectroscopy (EDX) was used to analyse the surface morphology and chemical composition, whereas the microstructure and coating uniformity were determined by optical microscope examination. The research revealed a negative influence of coating surface texture on coating thickness and consequently a lack of barrier and adhesion properties. The epoxy-polyester powder coating showed a better performance than the polyester coating. All tested coatings showed uniform structure.Coatings 2018, 8, 98 2 of 12 coating [1]. Today, thanks to the commercial success and wide application of powder coatings, extensive research is carried out in this field of study, in particular in the powder coating chemistry [5].Compared to liquid paints, powder coatings feature several advantages including the absence of volatile organic content, the reduction in coating material loss (up to 68%), the reduction of dust formation (from 40% to 84%) [1], high utilization rates, fast curing, the minimal health risks involved, and the elimination of hazardous wastes [7]. However, a major disadvantage of electrostatic coating technology is that the curing of the powder coating requires a significant amount of heat energy. For this reason, the future of these technologies will include the development of low temperature curable (LTC) powder coatings, whose application will enable energy saving solutions and also the ability to coat heat-sensitive substrates [8]. The second disadvantage is the lack of coating uniformity in Faraday-cage areas. Aside from several challenges needing improvement, powder coating is an environmentally-friendly coating process with good performance properties.There are numerous methods to evaluate the corrosion performance of powder coatings. Mafi et al. [5] investigated the protective behaviour of powder coatings in 3.5% w/w NaCl solution using electrochemical impedance spectroscopy (EIS) and open circuit potential (OCP) measurement, as well as differential scanning calorimetry (DSC) and dynamic mechanical thermal analysis (DMTA). Bhadu et al. [9] studied...

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Numerical investigation of coarse powder and air flow in an electrostatic powder coating process

Cited by 21 publications

References 16 publications

Improvement in the Production of Powder Coating Process of Fan Blades through PDCA

Improvement in the Production of Powder Coating Process of Fan Blades through PDCA

Investigation of Epoxy Powder Coated Galvanized Steel Substrate Through Electrostatic Powder Coating System

Experimental Evaluation of Polyester and Epoxy–Polyester Powder Coatings in Aggressive Media

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