Question

State whether the following statement is true or false regarding the environmental impacts of ECM.

(a) “In ECM, accumulation of toxic compounds is due to nitrate reduction at tool cathode.”

(b) True

(c) False

I have been asked this question in class test.

My doubt stems from ECM-Environmental Impact in section Electrochemical Processes of Advanced Machining

Answer 1

Correct choice is (a) “In ECM, accumulation of toxic compounds is due to nitrate reduction at tool cathode.”

Explanation: When chromate containing metals dissolute, nitrate accumulate at cathode tool, which results in toxic chromate and ammonia compounds.