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 Electropolishing [0]


Electro polishing, also referred to as electrochemical polishing, is an electrochemical process that removes material from a metallic workpiece. It is used to polish, passivate, and de burr metal parts. It is often described as the reverse of electroplating. It differs from anodizing in that the purpose of anodizing is to grow a thick, protective oxide layer on the surface of a material (usually aluminum) rather than polish. Also known as electrolytic polishing in metallography, it may be used in lieu of abrasive fine polishing in micro structural preparation. Electro polishing has many applications in the metal finishing industry because of its simplicity and it can be applied to objects of complex shape. Typical examples are electro polished stainless steel drums of washing machines and stainless steel surgical devices. Electropolishing is also commonly applied to the preparation of thin metal samples for transmission electron microscopy because electropolishing does not cause mechanical deformation of surface layers usually observed when mechanical polishing is used. Anodic dissolution under electropolishing conditions deburrs metal objects due to increased current density on corners and burrs. Ultra high vacuum (UHV) components are typically electropolished in order to have a smoother surface for improved vacuum pressures, outgassing rates, and pumping speed.

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