Corrosion Behavior of TiN/CrN Nanoscale Multi-layered Coating in Ringer s Solution
Publish Year: 1399
نوع سند: مقاله ژورنالی
زبان: English
View: 340
This Paper With 8 Page And PDF Format Ready To Download
- Certificate
- من نویسنده این مقاله هستم
استخراج به نرم افزارهای پژوهشی:
شناسه ملی سند علمی:
JR_IJE-33-2_018
تاریخ نمایه سازی: 25 خرداد 1399
Abstract:
In this article, corrosion behavior of the single-layered TiN, single-layered CrN and multi-layered TiN/CrN coatings have been fabricated on 420C stainless steel (SS) by Cathodic Arc Evaporation (CAE) method in Ringer s solution was studied. The electrochemical appraisal was done by the Potentiodynamic Polarization (PDP) and Electrochemical Impedance Spectroscopy (EIS) tests. Results of PDP test revealed that all coated specimens have an increment in the polarization resistance (Rp) values (ranges from 438.2 to 593.6Ω.cm2) compared to bare SS (268.1Ω.cm2). Corrosion rate values for bare 420C SS and CrN, TiN and multi-layered TiN/CrN coatings were measured 0.086, 0.042, 0.050 and 0.068mpy, respectively. Furthermore, EIS results were showed that the single-layer CrN coating well depicted by an equivalent circuit with three time constants and has larger impedance and maximum logarithmic variation of C2. Finally, the corrosion performance results confirmed that single-layered CrN coating is an appropriate choice for deposition on 420C SS with the aim of application in general surgical instruments.
Keywords:
Authors
G. Faghani
Department of Mechanical Engineering, Babol Noshirvani University of Technology, Babol, Iran
S. M. Rabiee
Department of Materials Engineering, Babol Noshirvani University of Technology, Babol, Iran
S. Nourouzi
Department of Materials Engineering, Babol Noshirvani University of Technology, Babol, Iran
H. Elmkhah
Department of Materials Engineering, Bu-Ali Sina University, Hamedan, Iran