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In practice, what must be the temperature of electrolyte used in ECM?

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In practice, what must be the temperature of electrolyte used in ECM?

(a) 10 – 20^oC

(b) 20 – 40^oC

(c) 60 – 80^oC

(d) 80 – 100^oC

The question was asked in final exam.

This interesting question is from ECM-Process Characteristics in portion Electrochemical Processes of Advanced Machining

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Correct answer is (c) 60 – 80^oC

The explanation is: Temperature of electrolyte used in ECM must not exceed 60 – 70^oC.

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