Metal and plastic parts are sometimes given a layer of coating to improve their appearance and to provide them with an extra level of resistance. These coatings are designed to protect the objects from such things as: corrosion, heat, electrical interference, scratching and other abrasions, and thermal shock, etc. Coatings can also be used to add and enhance the functionality in terms of electrical/thermal conductivity, etc.

Coating is done by a variety of processes such as: powder coatings, dip coatings, electroplating, anodizing, galvanizing, and spraying, etc. The coating thickness can vary from a few microns to a few millimeters. Using the right process and material, coatings can be applied to various types of substances such as stainless steel, leather, glass, ceramic, wood, fiber, plastic, and metals, etc.

There are various types of coatings that can be applied such as: rubber, aluminum, copper, silver, gold, acrylic, boron nitride, titanium nitride, ceramic, epoxy, furan, graphite, plastic, latex, nylon, phenolic resins, plastisol, polyurethane, teflon, silicone, tin, chrome, wax, zinc, and vinyl, etc. In addition, to enhance the appearance of items that are coated, different colors such as blue, green, metallic gray, white, red and combinations of them are applied to many metal and plastic parts, especially in automobiles.

Cement, wall paint and mortar are also types of coatings that are applied to buildings and other structures. Of these, paint is a very common type of coating that is seen in all types of applications. There are specific types paints such as rust paints that are designed for use on certain types of objects. Paints can also be designated for indoor or outdoor use and can be fade resistant and waterproof. Primer is also another type of coating that is often used in conjunction with paint.

Some coatings such as anti skid coatings are used for safety reasons. These are generally applied to floors of areas that may become very slippery. The coating will help you to keep your footing. Coatings are also used for protections in the water as salt water is very corrosive to metal ship parts. Medical equipment and laboratory equipment can also be coated with transparent sealants that have anti-microbial properties.

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