April 18, 2024
Ali Shanaghi

Ali Shanaghi

Academic rank: Associate Professor
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Education: Ph.D in eng
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Faculty: Technical Engineering

Research

Title Corrosion behavior of reactive sputtered Ti/TiN nanostructured coating and effects of intermediate titanium layer on self-healing properties
Type Article
Keywords
Ti/TiN nanostructured coatings Reactive sputtering Corrosion resistance Al 7075 Self-healing property
Journal SURFACE & COATINGS TECHNOLOGY
Researchers Ali Shanaghi

Abstract

The 7xxx series aluminum alloys are anodic compared to the 1xxx 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.