A steel sheet metal part has total surface area = 36 in2 . How long will it take to deposit a copper plating (assume valence = þ1) of thickness = 0.001 in onto the surface if 15 amps of current are applied?
Increasing current is applied to a work part surface in an electroplating process according to the relation I = 12.0 + 0.2t, where I = current, amps; and t = time, min. The plating metal is chromium, and the part is submersed in the plating solution for a duration of 20 min. What volume of coating will be applied in the process?