Surface finishing comprises a wide range of industrial processes that alter the surface of a manufactured item in order to achieve a certain property.
These finishing processes are employed to:
- improve appearance, adhesion or wet ability, solder ability, corrosion resistance, tarnish resistance, chemical resistance, wear resistance, hardness, modify electrical conductivity
- removal of burrs and other surface flaws
- control the surface friction
There as well are some cases where these techniques are brought to use to restore original dimensions so as to repair an item. An unfinished surface is often called mill finish. Surface finish is also known as surface texture or surface topography, is the nature of a surface defined by the characteristics of lay, surface roughness, and waviness.
Surface finishing tends to control friction and transfer layer formation during sliding, and thus is an important factor.
Every manufacturing process produces a surface texture, and the process is normally optimized to ascertain that the resulting texture is usable. Additionally, it may also include grinding (abrasive cutting), polishing, lapping, abrasive blasting, honing, electrical discharge machining (EDM), milling, lithography, industrial etching/chemical milling, laser texturing, or other processes.
Surface finishing processes are categorized on the basis of their affection the work piece. The processes include:
- Removing or reshaping finishing
- Adding or altering finishing
Surface finishing may be defined as any process that alters the surface of a material for aesthetic or functional purposes. The basis material can be a metal, a plastic, concrete, a ceramic. To be precise, any material used for engineering or decorative purposes can be given finish using this process.
SURFACE FINISHING TECHNIQUES
The five major processes that make up surface finishing are:
- abrasive blast cleaning and protective coating
- electroplating and electro less plating
- hot dip galvanizing and tinning
- powder coating
Use in Industrial field
It can be used for industrial coatings. These are heavy-duty paints designed specifically for the purpose of imparting corrosion resistance of finest manner to surfaces. All of us are familiar with paint. It issued in our homes to paint plaster, timber, metal, etc. In the industry, specially formulated paints are used to coat goods, automobiles, trucks, ships, chemical tanks, industrial buildings, etc. Moreover, foundries use paints to colour items for the identification or as a protective coating prior to another operation over it.
USEFULNESS OF SURFACE FINISHING TO OUR DAILY LIFE
Today, not one activity can be undertaken by mankind that does not include surface finishing – be it the clock radio or similar, it happens to be the surface finishing industry that has made possible the design of the unit and the decoration on it. Even the light fitting has a lustre or colour of the fitting due to the surface finishing process. Not only does it provide shine, it as well gives smoothness and evenness to the profile of the component.
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