Effect of Bilayer Period on Corrosion Resistance Behavior of CrN/Cr Nanomultilayers Grown On 304 ss

摘要

CrN/Cr nano-multilayer films grown by using unbalanced magnetron sputtering (UBMS) on 304stainless-steel (304 ss), varying the bilayer period (?) with 20, 100 and 200 nm, and a total thickness ofabout 1 μm. In this study, the influence of the bilayer period on the electrochemical properties of thesefilms have been investigated. The corrosion resistance of these films was studied by means ofelectrochemical impedance spectroscopy (EIS) in a 3.0% NaCl solution at room temperature, varyingthe immersion time from 1 to 168 of constant immersion. The performance of the CrN/Cr nano-multilayer was enhanced with the period increase, which can be attributed to the formation of a densepassive layer. This multilayer architecture hinds columnar film growth resulting in better corrosionresistance.