Transcription of UNIT 4 METAL COATING PROCESSES Metal Coating …
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33 METAL COATING PROCESSES UNIT 4 METAL COATING PROCESSES Structure Introduction Objectives METAL and Non- METAL Coatings Metallic Coatings Non-Metallic Coatings Electroforming Galvanizing Anodizing Organic Coatings Summary INTRODUCTION COATING is a covering that can be applied to the surface of an object, normally called as substrate. The purpose of application of COATING is the value enhancement of the substrate by improving its appearance, corrosion resistant property, wear resistance, etc. Process of COATING involves application of thin film of functional material to a substrate. The functional material may be metallic or non-metallic; organic or inorganic; solid, liquid or gas.
mouldes and dies, moulds for lenese, plates for embosing and printing. Electroless Plating As indicated by its name it is a plating process done entirely by chemical reaction, no external source of electric current is required in this case. Deposition of metal onto a part surface occurs in an aqueous solution containing ions of the desired
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