Optimisation of novel bath for plasma electrolytic nitrocarburising of 316L stainless steel and study of tribological properties of treated steel surfaces

2009 ◽  
Vol 25 (8) ◽  
pp. 628-633 ◽  
Author(s):  
F. Mahzoon ◽  
M. E. Bahrololoom ◽  
S. Javadpour
2015 ◽  
Vol 62 (5) ◽  
pp. 288-293 ◽  
Author(s):  
Shabnam Karimi ◽  
Fatemeh Mahzoon ◽  
Sirus Javadpour ◽  
Kamal Janghorban

Purpose – This paper aims to study the deposition of ZrO2 on 316L stainless steel surface using cathodic plasma electrolytic deposition (CPED) technique in potassium hexafluorozirconate (K2ZrF6) electrolyte solution to promote its corrosion and tribological properties. Design/methodology/approach – Plasma electrolytic oxidizing (PEO) technique is commonly used to form zirconium dioxide (ZrO2) on various substrates. But, in this paper, cathodic type of this technique (CPED) was used. Findings – Composition of the surface layer was analyzed by X-ray diffraction (XRD) and the formation of ZrO2 on the substrate was confirmed. Scanning electron microscope (SEM) was used to observe the unique morphology of the surface layer. The corrosion resistance of the coated surface was investigated by electrochemical methods involving cyclic voltammetery in Ringer’s solution. The treated sample showed a better pitting resistance. Pin-on-disk wear tests revealed that the friction coefficient of the coated sample is lower than that of the substrate. Also, it was shown that hardness and roughness of the coated sample increased after plasma electrolytic treatment. Originality/value – This paper considers the CPED of ZrO2 coating on 316L stainless steel. Some recent research works with ZrO2 coating have been prepared by PEO. There is limited or no record on the study of ZrO2 coatings by CPED process. In this study, the effort has been made to prepare a zirconia (ZrO2) coating on the stainless steel substrate through cathodic plasma electrolytic process under 200 V. Due to the excellent wear resistance, ZrO2 may be used as a high resistant and protective coating on stainless steels, which are widely used in industries and biomedical applications.


2020 ◽  
Vol 382 ◽  
pp. 125175 ◽  
Author(s):  
L.B. Coelho ◽  
S. Kossman ◽  
A. Mejias ◽  
X. Noirfalise ◽  
A. Montagne ◽  
...  

Vacuum ◽  
2007 ◽  
Vol 81 (11-12) ◽  
pp. 1448-1452 ◽  
Author(s):  
J.R. Gomes ◽  
S.S. Camargo ◽  
R.A. Simão ◽  
J.M. Carrapichano ◽  
C.A. Achete ◽  
...  

Materials ◽  
2021 ◽  
Vol 14 (6) ◽  
pp. 1482
Author(s):  
Wei Wang ◽  
Zhiqiang Fu ◽  
Lina Zhu ◽  
Wen Yue ◽  
Jiajie Kang ◽  
...  

The effects of titanium (Ti) ion-implanted doses on the chemical composition, surface roughness, mechanical properties, as well as tribological properties of 316L austenitic stainless steel are investigated in this paper. The Ti ion implantations were carried out at an energy of 40 kV and at 2 mA for different doses of 3.0 × 1016, 1.0 × 1017, 1.0 × 1018, and 1.7 × 1018 ions/cm2. The results showed that a new phase (Cr2Ti) was detected, and the concentrations of Ti and C increased obviously when the dose exceeded 1.0 × 1017 ions/cm2. The surface roughness can be significantly reduced after Ti ion implantation. The nano-hardness increased from 3.44 to 5.21 GPa at a Ti ion-implanted dose increase up to 1.0 × 1018 ions/cm2. The friction coefficient decreased from 0.78 for un-implanted samples to 0.68 for a sample at the dose of 1.7 × 1018 ions/cm2. The wear rate was slightly improved when the sample implanted Ti ion at a dose of 1.0 × 1018 ions/cm2. Adhesive wear and oxidation wear are the main wear mechanisms, and a slightly abrasive wear is observed during sliding. Oxidation wear was improved significantly as the implantation dose increased.


Sign in / Sign up

Export Citation Format

Share Document