E

Edge Coverage
The ability to flow over, build and adhere to the sharp corners, angles and edges of components.

Elasticity
The ability to recover from stretching.

Electrode
A metal filament within or at the end of a powder spray gun used to create air ions at high voltage to produce charged particles (Corona).

Electrostatic Charge
This is a charge that is carried on the surface of an insulated object such as a powder particle. The charge can be generated by friction or applied by an external field or corona.

Electrostatic Deposition
A technique of moving and charging powder so that it is deposited on an earthed substrate.

Electrostatic Fluid Bed
A fluid bed equipped with an electrode grid to charge powder so that it is deposited on an earthed component.

Epoxy
A type of powder coating manufactured using epoxy resins, generally having high mechanical strength and corrosion resistance. But limited in gloss and colour retention when exposed to sunlight.

Epoxy Resin
Film forming binder usually made from Biphenyl-A and Epicholrohydrin. Characterised as a Polyther.

Erosion
Wearing away of a coating to expose the substrate.

Ester
A chemical formed by the reaction of an acid and an alcohol.

Etching
Surface preparation of metal before chemical process. Removal of a layer of the base metal.

Explosion Vent
Pressure relief membrane to prevent damage to a confined dust collection device.

Explosion Limit
Range of the ratio of powder particles to air which the mixture will explode or ignite.

Extender
Pigment that can contribute specific properties to a coating, but usually does not substantially affect the colour.

Extrudate
Molten powder coating formulation as it exits the extruder during the manufacture process.

Extruder
Device used to melt & mix plastics and powder coatings. An extruder utilises heat and mixing to mechanically knead the formulation to achieve a homogeneous mixture.