Transcription of UNIT 4 METAL COATING PROCESSES Metal Coating Processes
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UNIT 4 METAL COATING PROCESSES Metal Coating Processes
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. This can be genuine criteria of classification of coatings.
35 There are some limitations in barrel plating, the tumbling action Metal Coating Processes which is inherent in the process may damage the soft metal parts, threads, other parts with good finish, and some other parts with sharp
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