Multilayer corrosion-resistant ceramic-metal coatings on stainless steel obtained by magnetron sputtering

In this work, multilayer ceramic-metal coatings (Metal/nitride ceramics/ Metal/oxide ceramics) with increased corrosion resistance were obtained. The structure of each layer of the obtained coatings was researched using the transmission electron microscope JEOL JEM-2100. The metal layers had a columnar crystal structure, the layers of nitride ceramics predominantly had a nanocrystalline structure (grain size was about 15 nm), the layers of oxide ceramics were amorphous. Corrosion resistance was evaluated on a potentiostat P-45X in a 0.5 M NaCl solution using a three-electrode cell. The created coating reduced the corrosion rate of the stainless steel substrate by an order of magnitude.