You have manufactured a femoral head using 316L stainless steel. In an attempt to improve the corrosion resistance, you coat the femoral head using electrolysis in an ambient environment, which results in an approximately 10-micron coating of cobalt-chrome on top of the existing surface of the femoral head a) Draw and label the bulk and surface layers of the femoral head after electrolysis.

b) If your application is under fretting conditions, give a general explanation why or why not the cobalt-chrome coating may not appreciably improve corrosion resistance?