Consider the problem below, if the test is performed using an RDE, what will be the

rotational speed $(w)$ on the protection potential and current.

Assume that $D_0=10{10}^{-5}c\frac{m^2}{s}$ and $n=1cp,\frac{i_0}{H_2}=10{10}^{-8}\frac{A}{c}{m}^2$

E$3\mathrm{.}12.$ Calculate the corrosion potential, corrosion current, and protection current

needed to stop corrosion for cadmium in a corrosive deaerated medium.

Additional information:

$\{\begin{array}{c}\text{:}[C{d}^{2+}]={10}^{-5}M\\ pH=1\\ a_c=-0\mathrm{.}360Vvs.\text{S}\text{H}\text{E}\end{array}$

$b_a=0\mathrm{.}100\frac{V}{d}$ecade $b_c=-0\mathrm{.}120\frac{V}{d}$ecade $i_{Cd}={10}^{-3}\frac{A}{c}{m}^2$