Corrosion behaviour of CrN/Cr multilayers on stainless steel deposited by unbalanced magnetron sputtering

► We studied the influence of bilayer period on CrN/Cr multilayers corrosion resistance. ► CrN/Cr multilayers were produced by using unbalanced magnetron. ► The CrN/Cr multilayers have better corrosion resistance than AISI 304 substrate. ► Decreasing the bilayer period will increase corrosion resistance.