Question

A copper wire is exposed to a solution containing 0.2 M NaCl. The corrosion rate of the wire is found to be 5.8 microAmp/cm². Calculate the corrosion current density of the copper wire in the given environment.

Answer 1

The corrosion rate of the copper wire is given as 5.8 microAmp/cm. This value is already the corrosion current density. Corrosion current density  i_corr  is the measure of the rate of corrosion in terms of current per unit area. It is usually expressed in microAmp/cm or mA/cm. In this case, the corrosion current density of the copper wire in the given environment is 5.8 microAmp/cm.