Corrosion behavior of reactive sputtered Ti/TiN nanostructured coating and effects of intermediate titanium layer on self-healing properties

SURFACE & COATINGS TECHNOLOGY

卷:326

Article

Ghasemi, Sajjad¹  Shanaghi, Ali¹  Chu, Paul K.^2,3 

[1] Malayer Univ, Mat Engn Dept, Fac Engn, Malayer, Iran

[2] City Univ Hong Kong, Dept Phys, Tat Chee Ave, Kowloon, Hong Kong, Peoples R China

[3] City Univ Hong Kong, Dept Mat Sci & Engn, Tat Chee Ave, Kowloon, Hong Kong, Peoples R China

关键词: Ti/TiN nanostructured coatings;    Reactive sputtering;    Corrosion resistance;    Al 7075;    Self-healing property;   

DOI  :  10.1016/j.surfcoat.2017.07.046

来源: Elsevier

【 摘 要 】

The 7xxx series aluminum alloys are anodic compared to the lxxx series and other aluminum alloys due to the zinc content. In this work, Ti/TiN coatings are deposited on the7075 aluminum substrate by reactive magnetron sputtering and the corrosion resistance and self-healing properties are investigated. The coatings consist of TiN, TiOxNy, and TiO2 phases. Electrochemical polarization and impedance studies reveal desirable features of the nanostructured Ti/TiN coating. The charge transport resistance increases by a factor of 20 compared to the Al 7075 substrate. Impedance tests are performed after polarization to examine the self-healing behavior. An improvement of 1.9 times in the charge transport resistance and inductive loop is observed after immersion for 12 h compared to one hour after polarization. (C) 2017 Elsevier S.V. All rights reserved.

【 授权许可】

Free