Electric Discharge Machining (EDM) has metal removal rate of about 10-20 mm 3 /s. Ruszaj and Zybura- In electrochemical machining, the metal is removed by the anodic dissolution in an electrolytic cell in which work piece is the anode and the tool is cathode. In this process electrode wheel dissolution during electrolysis [1It relies on the work of ]. In the electrochemical grinding process metal is removed by electrochemical decomposition and abrasion of the metal. Electrochemical machining (ECM) is one of the least used non-traditional methods despite a high, stress free metal removal rate because it requires a high level of craftsmanship in allowing for the flow effects of the electrolyte. I. ηINTRODUCTION LECTROCHEMICAL machining is classified as unconventional machiningIt is based on an anodic . 25.7 Identify the two significant disadvantages of electrochemical machining Significant cost of electrical power, problems of disposing electrolyte sludge 25.8 How does increasing discharge current affect metal removal rate and surface finish in electric discharge machining? Electrochemical machining is a method that finishes the workpiece surfaces by means of anodic metal dissolution. - Generally the rate of metal removal for various machining processes are as follows: 1. This controlled chemical dissolution will simultaneously etch all exposed surfaces even though the penetration rates of the etch may be only 0.0005 0.0030 in./min. It is also known as contactless electrochemical forming process. - Among all the machining processes given above, Electro-Chemical Machining has highest rate of metal removal. The electrolyte is pumped through the gap between the workpiece and the tool, while direct current is passed through the cell, to dissolve metal from the work piece. The noteworthy feature of electrolysis is controlled chemical reaction. ELECTRO CHEMICAL MACHINING Introduction: The process of metal removal by electro chemical dissolution was known as long back as 1780 AD but it is only over the last couple of decades that this method has been used to advantage. Electrochemical machining is a metal machining technology based on electrolysis where the product is processed without contact and thermal influence. In Smithells Metals Reference Book (Eighth Edition), 2004. Materials removed from the workpiece stay in the electrolyte fluid. Electrochemical machining (ECM) is a method of removing metal by an electrochemical process. Material is removed by microscopic electrochemical cell action, as occurs in corrosion or chemical dissolution of a metal. The machining tool is the cathode (-) that acts under DC current and in the presence of an electrolyte fluid to create the anodic reaction that removes workpiece (+) surface material in a precise 30.8.6 Electrochemical machining. Its use is limited to electrically conductive materials. Electrochemical Grinding machining is affected both by the grinding action and by the electrochemical process. it may be called 'mechanically assisted electrochemical machining'. It is normally used for mass production and is used for working extremely hard materials or materials that are difficult to machine using conventional methods. But since in electrochemical machining the objective is to remove metal, the work piece is connected to the positive, and the tool to the negative, terminal. Keyword - Electrochemical, material removal rate, tool electrode, unconventional machining. 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