coating
Sign in to saveAlso known as surface coating, coat
thumb|Lacquer being sprayed onto a cabinet A coating is a covering that is applied to the surface of an object, or substrate. The purpose of applying the coating may be decorative, functional, or both. Coatings may be applied as liquids, gases or solids e.g. powder coatings.
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- Coatings
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Article
16 sectionsContents
- Applications
- Other
- Analysis and characterization
- Formulation
- Processes
- Vapor deposition
- Chemical vapor deposition
- Physical vapor deposition
- Chemical and electrochemical techniques
- Spraying
- Roll-to-roll coating processes
- Physical
- See also
- Notes
- References
- Further reading
thumb|Lacquer being sprayed onto a cabinet A coating is a covering that is applied to the surface of an object, or substrate. The purpose of applying the coating may be decorative, functional, or both. Coatings may be applied as liquids, gases or solids e.g. powder coatings.
Paints and lacquers are coatings that mostly have dual uses, which are protecting the substrate and being decorative, although some artists paints are only for decoration, and the paint on large industrial pipes is for identification (e.g. blue for process water, red for fire-fighting control) in addition to preventing corrosion. Along with corrosion resistance, functional coatings may also be applied to change the surface properties of the substrate, such as adhesion, wettability, or wear resistance. In other cases the coating adds a completely new property, such as a magnetic response or electrical conductivity (as in semiconductor device fabrication, where the substrate is a wafer), and forms an essential part of the finished product.