Electrochemical grinding

A wide apphcation of electrochemical grinding is the production of tungsten carbide [12070-12-1] cutting tools (see Carbides Tool materials). ECG is also useful in the grinding of fragile parts such as hypodermic needles and thinwaH tubes. 

Electrochemical gas sensor, 13 589 Electrochemical grinding, 9 603 Electrochemical machining (ECM), 9 590-606... 

In electrochemical grinding, the mechanical removal of both the passive anodic film and the metal proceeds concurrently with the anodic dissolution. In this method, normally electrolytes, in which the metal dissolution is localized only on the areas of abrasive depassivation, are used. This enhances the machining accuracy in relation to the ECM. As compared with mechanical grinding, the combined method is characterized by a significantly lower tool wear and a high productivity. 

Electrochemical grinding and electrochemical deburring are techniques related to electromachining in which excess metal is removed by a combination of mechanical abrasion and anodic dissolution. 

Figure 8.10 Aero engine component constructed partly from a nickel alloy honeycomb cell structure (cell size 2 mm). The top surface is smoothed using electrochemical grinding. Photograph supplied by Rolls Royce Ltd, Aero Division,...

It is possible to affect electrochemical grinding and polishing by using a cathodic wheel with an anodic workpiece separated by a flowing electrolyte. Tungsten carbide tools are usually prepared by such a process. An electrochemical saw has also been produced. 

Electrochemical Grinding (ECG) combination of electrochemical reaction and abrasive machining of workpiece. 

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