Comprehensive Electrochemical Studies on Nanolayered Multilayered Ti/TiN and TiAl/TiAlN Coatings Deposited on Ti6Al4V Substrates

被引：2
作者：
Chenan, Arunchandran [1 ,3 ]
Jyothymol, J. [1 ,3 ]
Abirami, S. [1 ,3 ]
Bonu, Venkataramana [2 ]
Barshilia, Harish C. [2 ]
机构：
[1] CSIR Cent Electrochem Res Inst, Corros & Mat Protect Div, Smart Coating Res Lab, Karaikkudi 630003, Tamil Nadu, India
[2] CSIR Natl Aerosp Labs, Nanomat Res Lab, Surface Engn Div, Bangalore 560017, Karnataka, India
[3] Acad Sci & Innovat Res AcSIR, Ghaziabad 201002, India
来源：
CORROSION | 2023年 / 79卷 / 02期
关键词：
corrosion properties of TiAl/TiAlN; corrosion properties of Ti/TiN; Ti/TiN; TiAl/TiAlN; CORROSION-RESISTANCE; TI-6AL-4V ALLOY; TITANIUM-ALLOYS; NITRIDE COATINGS; TIALN COATINGS; THIN-FILMS; PVD TIN; BEHAVIOR; CRN; STEEL;
D O I：
10.5006/4129
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Corrosion resistance properties of Ti/TiN and TiAl/TiAlN nanolayered multilayered coatings deposited on Ti6Al4V alloy substrates by unbalanced magnetron sputtering were investigated. The coatings contain a bi-layer thickness of Ti/TiN or TiAl/TiAlN similar to 3.5 nm/4 nm and the total thickness of the coating is similar to 9 mu m. Corrosion properties of the coatings were investigated using electrochemical impedance spectroscopy (EIS) for 30 d while immersed in 3.5 wt% NaCl solution. EIS investigation of the coatings showed that the corrosion occurred due to the penetration of electrolyte and oxygen through the micro/nanopores present in the coatings. It was found that the TiAl/TiAlN coating offered corrosion protection superior to that of the Ti/TiN coating during the immersion study. Potentiodynamic polarization studies revealed that both coatings showed passive behavior. Formation of a passive film on the coated surface during polarization enhanced the barrier properties of the coatings and provided anodic protection to the underlying alloy.
引用
收藏
页码：134 / 145
页数：12
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