Category: Unconventional Machining Processes

Surface finish in ECM is affected by the following factors: Unevenness of surface occurs due to potential gradient across the gap and potential difference inside the grain of different alloying element in the work material. If the potential gradient across the gap is higher unevenness of surface finish will be less and vice versa. Sporadic…

Electrolytes Alloys 20% NaCl Iron-based alloy HCl or mixture of brine and H2SO4 Nickel-based alloy 10% HCl + 10% HF + HNO3 Titanium-based alloy NaCl CO-Cr-W alloy Strong alkaline solution WC (Tungsten Carbide) alloy Requirement of Flow of Electrolyte

Therefore, 

Electrochemical machining is a depleting process, based on Faraday’s law of electrolysis. Workpiece works as an anode and tool acts as a cathode. The tool material used is copper and brass. Sometimes stainless steel is also used as a tool material. The tool used is hollow through which electrolyte is pumped at high pressure as…