Surface Coating of Miscellaneous Metal Parts
and Products:
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Common Terms Used to Describe Surface Coating Operations
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Coatings
Enamels
Guide Coatings
High-solids Coatings
Intermediate or Midcoat
Lacquers
Powder Coatings
Primer
Topcoat
Ultraviolet (UV) Coatings
Urethanes
Vinyl Coatings
Waterborne Coatings |
Coating Application
Methods
Brush Coating
Dip Tanks
Electrodeposition
Flow Coating
Roller Coating
Spray Booths |
Transfer Efficiency
 The ratio of the amount of coating solids deposited onto the surface
of the coated object to the total amount of coating solids that
exit the coating device is referred to as transfer efficiency.
Coating that is sprayed but fails to deposit on the surface to
be coated is referred to as "coating overspray." Increased
transfer efficiency results in less overspray. The level of transfer
efficiency is usually used in a description of spray devices.
 High transfer efficiency has several benefits: reduces the amount
of coating used and, consequently, reduces emissions; reduces solvent
concentration around the worker; reduces time spent in applying
coatings, since more coating reaches the substrate; and reduces
the amount of solvent needed for overspray cleanup.
The transfer efficiency of spray equipment is influenced by several
factors including the shape of the surface being coated, type of
gun, velocity of the aerosol, skill and diligence of the operator,
and extraneous air movement within the spray area (or booth).
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