期刊
SURFACE & COATINGS TECHNOLOGY
卷 381, 期 -, 页码 -出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.surfcoat.2019.125108
关键词
CrN hard coating; Atomic layer deposition; TiN coating; Oxidization; TiOxNy-TiN sealing layer; Corrosion
资金
- Fundamental Research Funds for the Central Universities [NS2017030]
- Foundation of Key Laboratory of Marine Materials and Related Technologies, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences [2018K03]
Based on the excellent conformality and uniformity of atomic layer deposition (ALD), ALD thin films can seal the defects in magnetron sputtered CrN coating. In this work, atomic layer deposited TiN layer is adopted to seal CrN to improve its anti-corrosion properties. The oxidization of TiN forms TiOxNy-TiN composite layer including TiN bottom layer and TiOxNy upper layer, which can limit the charge transport, inhibit the diffusion of corrosive media, such as chlorine ions. Therefore, the addition of TiOxNy-TiN sealing layer significantly improves the corrosion resistance of CrN coated steel, and decreases its corrosion current density, due to the synergistic effect of TiOxNy and TiN in the composite sealing layer.
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