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An experimental study has been made to examine the relationship between dissolution current efficiency and dimensional control during the electrochemical machining (ECM) of steel in NaCl , NaClO 3 and NaNO 3 electrolytes. The current efficiency for iron dissolution was measured in a flow cell under controlled anodic current densities ranging from 1 to 100 A/cm 2 . The laboratory results were then compared to those obtained under actual ECM conditions. It is shown that the current efficiency vs. current density curve is a useful tool to determine optimal ECM operating conditions for achieving the best possible combination of dimensional control and surface finish.
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Chin et al. (1973) studied this question.
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