GATE ME 2016 Set 2 — Question 62
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Manufacturing Processes → Machining & Machine Tools → Non-Traditional Machining
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Question
The surface irregularities of electrodes used in an electrochemical machining (ECM) process are and as shown in the figure. If the work-piece is of pure iron and is applied between the electrodes, the largest feed rate is ___________ .
Assume the iron to be dissolved as and the Faraday constant to be .
| Conductivity of the electrolyte | |
|---|---|
| Over-potential voltage | |
| Density of iron | |
| Atomic weight of iron |

Correct answer
51 to 52
Solution
In Electrochemical Machining (ECM), the feed rate is given by:Where:
- (Conductivity)
- (Applied voltage)
- (Over-potential voltage)
- (Atomic weight of iron)
- (Density of iron)
- (Valency for )
- (Faraday constant)
- is the inter-electrode gap.
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