Electrochemistry

Electroplating & Coatings

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Electroplating is the operation of a metal coating to a metallic or other conducting surface by an electrochemical process. The phrase is also used for electrical oxidation of anions onto a solid substrate. Electroplating is chiefly used to convert the surface properties of an object e.g. abrasion and wear resistance, corrosion protection, lubricity, aesthetic qualities, etc., but may also be applied to build up thickness on undersized parts or to form objects by electroforming. Electrodeposition is the function of metallic coatings to metallic or other conductive surfaces by electrochemical processes. A coating is a covering that is applied to the surface of an object; usually indicate to as the substrate. The aspiration of applying the coating may be decorative, functional, or both. The coating itself may be an all-over coating, fully covering the substrate, or it may only cover parts of the substrate pulse-electroplating can be commonly defined as metal deposition of pulsed electrolysis. Brush-electroplating, also known as selective plating or spot-plating is a technique which makes it available to deposit metals and/or alloy's on conducting materials. Hot-dip galvanization is a form of galvanization. It is the action of coating iron and steel with a layer of zinc by immersing the metal in a bath of molten zinc at a temperature of around 840 °F (449 °C).Galvanized steel is widely used in applications where corrosion resistance is desired without the cost of stainless steel, and can be identified by the crystallization patterning on the surface often called a "spangle". Conversion coatings are coatings for metals where the part surface is converted into the coating with a chemical or electro-chemical process. Examples include chromate conversion coatings, phosphate conversion coatings, bluing, black oxide coatings on steel, and anodizing.