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Electrostatic powder spraying (EPS)

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Glossary

Electrostatic powder spraying (EPS)

In this coating process, powder granules are electrostatically charged during spraying with air and attracted to the earthed component as a powder cloud. The powder layer melts when the component is heated and forms a closed coating after cooling.

EPS is a very environmentally friendly and economical coating process. Different types of powder coatings can be used to coat different substrate materials and meet different requirements.

The powder coating particles can be charged in two ways:

  • Corona charging
  • Tribocharging

 

In the corona spray system, the powder particles are charged negatively - either inside a spray gun or in an applied high-voltage field when the powder emerges. The ionised powder particles then travel along the field lines to the positively charged, grounded work-piece. If a high working speed and the coating of large surfaces are required, this process is the obvious choice. During tribo-charging (friction charging), the powder coating passes through a PTFE tube at high speed. Under air turbulence, all particles rub against the surface of the tube, give off electrons and are positively charged. Work-pieces with recesses and cavities in particular benefit from this process.

An essential component of the electrostatic powder spraying system technology is the powder coating booth. In addition to defined air guidance and extraction, it also contains control and safety systems as well as a powder recovery system.

Thermoset powder coatings are used, which melt and cross-link on the hot component surface.

Glossary

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Overspray-Test
Corrosion protection
Curing
Curing in process
Conveyor belt oven (continuous oven)
Tray oven (continuos oven)
Chain conveyor oven
Chamber oven
Drying process
Cooling (after annealing)
Exhaust air treatment
KTL breakdown voltage
Condensed water test according to DIN EN ISO 6270-2
Corrosion
Sacrificial anode
Local element
Rust
Surface protection
Burnishing
Hot-dip galvanising
Flame spraying
Galvanic coating
Conversion layer
Sherardising
Substrate
Colouring
Dry-film coat thickness
Fastening properties
Gloss level
Artificial weathering test
Weathering
Test procedures
Surface properties
Chemical resistance
Mechanical resistance
Flexibility
Natural weathering test
Physical properties
Passiveness, passive state
Protection, galvanic
Protection, temporary
Scale
Chromate Coating
Passivation coating
Self-passivation
Topcoat
Rack coating
Bulk process
Partial production lot
Drum coating
Erichsen ball recess
Coating thickness, total
Coating thickness, local
Coating thickness, reference
Delamination
Coating weight
Dry to the touch
Reference surface
Ductility
Spray coating
Sealing
Electroplated coating
Specific surface
Passive corrosion protection
Inorganic protective coatings
Organic protective coatings
Active corrosion protection
Forms of corrosion
Types of corrosion
Surface corrosion
Shallow pitting corrosion
Pitting corrosion
Contact corrosion
Bimetallic corrosion
Stress corrosion cracking
Hydrogen induced cracking
ISO 9001
Dip-Draw
Electro-dip painting (ETL)
Electrostatic powder spraying (EPS)
Phosphating
ISO 14001
Trueness of gauge
Dip-Spin
Coefficient of friction
Setting behaviour
Fastening and assembly
Kesternich test
Material effectiveness
Environmental management
Quality management
EMAS
Magnetic induction measurement
Engulfing
Scaling protection
Powder coating
Coil coating
X-ray fluorescence analysis
Beta backscatter method
Mandrel bend test
Eddy current method (phase sensitive)
Eddy current method (amplitude sensitive)
Turnover
Corrosion College
Powder sintering process
Zinc flake coatings
X-Ray
Dip coating process
Stone impact test
Process stages of KTL-seperation
Adhesion
Corrosion testing atmospheres conducive corrosion
Coat thickness and coat thickness measurement
Adhesion test according to DIN EN ISO 10683
Cross-cut test for adhesion
Thread tolerance
Pressure water jetting test
Fertiliser resistance
Anodic dip coating (ADC)
Cathodic dip coating (CDC)

Technical terms can not always be avoided. As corrosion experts, we not only want to give you comprehensive advice, we are also interested in making you a corrosion expert yourself.

The variety around the topic of corrosion and corrosion protection is also in our glossary at home: explanations from A as in Adhesion to T as in Thread tolerance. Have fun clicking through!