Surface coating

Surface coating

A substance applied to other materials to change the surface properties, such as color, gloss, resistance to wear or chemical attack, or permeability, without changing the bulk properties. Surface coatings include such materials as paints, varnishes, enamels, oils, greases, waxes, concrete, lacquers, powder coatings, metal coatings, and fire-retardant formulations. In general, organic coatings are based on a vehicle, usually a resin, which, after being spread out in a relatively thin film, changes to a solid. This change, called drying, may be due entirely to evaporation (solvent or water), or it may be caused by a chemical reaction, such as oxidation or polymerization. Opaque materials called pigments, dispersed in the vehicle, contribute color, opacity, and increased durability and resistance.

Organic coatings are usually referred to as decorative or protective, depending upon whether the primary reason for their use is to change (or preserve) the appearance or to protect the surface. Often both purposes are involved. See Electroplating of metals, Metal coatings

McGraw-Hill Concise Encyclopedia of Engineering. © 2002 by The McGraw-Hill Companies, Inc.
References in periodicals archive ?
M2 PRESSWIRE-August 19, 2019-: Acrylic Surface Coating Market Size, Share, Growth Factors by Top Brands, Leading Regions, Emerging Trends and Forecast to 2023
To delay this chloride ingress, the polymer surface coating has been applied to the reinforced concrete.
When considering offshore and sub-sea components, engineered surface coating solutions can be employed to achieve, amongst other things, improved corrosion and wear resistance.
To increase longevity, gas turbines have a dual surface coating: metal to protect against oxidation and corrosion; and ceramic to provide thermal insulation.
* Fabric Printing, Coating & Dyeing Surface Coating Operations
W.G.Beaumont & Son Ltd of Romford reports it is a chosen contractor for National Gas Grids for applying surface coating protection of weld joints and fittings in refurbishment programmes carried out in various areas of the UK.
* A unique print receptive surface coating that ensures printed data remains sharp, legible, and permanent even when exposed to extreme temperatures (-80[degrees] to +388[degrees]C), harsh chemicals/solvents, abrasion, oils/fuel etc.
a hydrophobic surface coating disposed on at least one surface of the topsheet or the acquisition/distribution component such that the hydrophobic surface coating forms a film on at least a portion of the coated surface and increases the barrier properties of the surface; wherein the coating comprises a mixture of at least two silicone polymers having a molecular weight of at least about 15,000 Mw and wherein the silicone polymers are polydimethylsiloxanes selected from the group consisting of vinyl-terminated polydimethsiloxanes, methyl hydrogen dime thylsiloxanes, hydroxyl-terminated polydimethysiloxanes, and combinations thereof and wherein the coating is substantially free of aminosilicones.
Israeli researchers claim to have developed a surface coating capable of preventing ice accumulation Israeli nanotechnology researchers claim to have developed a surface coating capable of preventing ice accumulation on plastic aircraft surfaces.
The ratings reflect the company's healthy financial risk profile, marked by a satisfactory capital structure and robust debt protection metrics, and the benefits that it derives from its strong track record in the niche protective surface coating industry, and its reputed customer base.
14 limit lead content in children's products to 300 parts per million (ppm), reduced from 600 ppm, and limit lead in paint and similar surface coating materials to 90 ppm, down from 600 ppm.