Synthesis and characterization of Ni-W/TiN nanocomposite coating with enhanced wear and corrosion resistance deposited by pulse electrodeposition

2019 ◽  
Vol 45 (11) ◽  
pp. 14015-14028 ◽  
Author(s):  
Weiwei Zhang ◽  
Baosong Li ◽  
Cuicui Ji
Keyword(s):  
Corrosion Resistance ◽  
Nanocomposite Coating ◽  
Pulse Electrodeposition ◽  
Synthesis And Characterization ◽  
Wear And Corrosion ◽  
Wear And Corrosion Resistance

scholarly journals Characterization of Electroless Nickel–Boron Deposit from Optimized Stabilizer-Free Bath

Coatings ◽  
2021 ◽  
Vol 11 (5) ◽  
pp. 576
Author(s):  
Muslum Yunacti ◽  
Alexandre Mégret ◽  
Mariana Henriette Staia ◽  
Alex Montagne ◽  
Véronique Vitry
Keyword(s):  
Corrosion Resistance ◽  
Salt Spray ◽  
Indentation Test ◽  
Electroless Nickel ◽  
Industrial Applications ◽  
Toxic Heavy Metal ◽  
Wear And Corrosion ◽  
Wear And Corrosion Resistance ◽  
Instrumented Indentation Test

Conventional electroless nickel–boron deposits are produced using solutions that contain lead or thallium, which must be eliminated due to their toxicity. In this research, electroless nickel–boron deposits were produced in a stabilizer-free bath that does not include any toxic heavy metal. During processing, the plating rate increased from 10 to 14.5 µm/h by decreasing the concentration of the reducing agent, leading to increased bath stability. The thickness, composition, roughness, morphology, hardness, wear, and corrosion resistance of the deposits were characterized. The new deposit presents an excellent hardness of 933 ± 56 hv50, 866 ± 30 hk50, and 12 GPa from the instrumented indentation test (IIT), respectively, which are similar to that of hexavalent hard chromium coating. Moreover, by using both potentiodynamic polarization and salt spray tests it was shown that the coating presents higher corrosion resistance as compared to standard nickel-boron coatings. The new deposit exhibits properties close to those of the conventional electroless nickel–boron deposits. Therefore, it could replace them in any industrial applications.

Improving the wear and corrosion resistance of Ti–6Al–4V alloy by deposition of TiSiN nanocomposite coating with pulsed-DC PACVD

Wear ◽  
2017 ◽  
Vol 390-391 ◽  
pp. 93-103 ◽  
Author(s):  
Farid Movassagh-Alanagh ◽  
Amir Abdollah-zadeh ◽  
Mahmood Aliofkhazraei ◽  
Mohammad Abedi
Keyword(s):  
Corrosion Resistance ◽  
Nanocomposite Coating ◽  
Pulsed Dc ◽  
Wear And Corrosion ◽  
Wear And Corrosion Resistance

scholarly journals Characterization of Wear and Corrosion Resistance of Stellite 6 Laser Surfaced Alloyed (LSA) with Rhenium

Coatings ◽  
2021 ◽  
Vol 11 (3) ◽  
pp. 292
Author(s):  
Irina Smolina ◽  
Karol Kobiela
Keyword(s):  
Corrosion Resistance ◽  
Process Parameters ◽  
Corrosion Potential ◽  
Laser Surface ◽  
Stellite 6 ◽  
Wear And Corrosion ◽  
Study Results ◽  
Wear And Corrosion Resistance ◽  
Better Than

This paper presents the method of preparation and study results of the Stellite 6 laser surface alloyed (LSA) with rhenium using na LDF diode laser (4000 W). During this process, a rhenium powder was introduced onto the surface of the Co-based alloy. The possibility of improving wear and corrosion resistance properties is interesting and worth investigating. The selected process parameters: the laser power of 900 W, powder feed rate in the range 1.92–3.83 g/min, and necessarily preheating of the substrate up to 200 °C—allowing to obtain the LSA layers on the Stellite 6 substrate. Depending on the process parameters, it is possible to modify the substrate’s surface layer in terms of rhenium concentration and geometrical characteristics of the laser tracks. It was found that undissolved particles of rhenium in laser-alloyed layers have a non-significant effect on their hardness and abrasion resistance. The laser surface-alloyed corrosion potential is better than the corrosion potential of the Stellite 6 substrate, including reducing resistance to pitting corrosion with a high ability to repassivation.

Pulse reverse electrodeposition and characterization of nanocrystalline zinc coatings

RSC Advances ◽  
2014 ◽  
Vol 4 (94) ◽  
pp. 52562-52570 ◽  
Author(s):  
Qingyang Li ◽  
Zhongbao Feng ◽  
Jinqiu Zhang ◽  
Peixia Yang ◽  
Fenghuan Li ◽  
...  
Keyword(s):  
Corrosion Resistance ◽  
Zinc Coating ◽  
Mechanical Wear ◽  
Sulfate Bath ◽  
Wear And Corrosion ◽  
Pulse Reverse ◽  
Wear And Corrosion Resistance ◽  
Zinc Coatings

A nanocrystalline zinc coating is produced by pulse reverse electrodeposition in a sulfate bath with polyacrylamide as the only additive and the mechanical, wear and corrosion resistance properties are evaluated.

scholarly journals Electron microscopy characterization of W-O multilayers

2009 ◽  
Vol 15 (S3) ◽  
pp. 59-60
Author(s):  
N. M. G. Parreira ◽  
T. Polcar ◽  
Y. T. Pei ◽  
D. Galvan ◽  
J. Th. M. De Hosson ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Corrosion Resistance ◽  
Oxide System ◽  
Preferential Choice ◽  
Wear And Corrosion ◽  
Attractive Candidate ◽  
Wear And Corrosion Resistance ◽  
Microscopy Characterization ◽  
Dark Blue

AbstractIn the decorative field, besides the optical characteristics needed for achieving desired colours, the material should have suitable properties able to assure the daily use of the component without significant degradation. Oxides are well known materials with a high wear and corrosion resistance which make them a preferential choice of coatings for environmental protection. However, the intrinsic colours possible to be achieved in a single oxide system are very limited. For example in W-O system, besides the different tonalities of grey, only the dark blue can be obtained for slightly substochiometric WO3 compound. The pallet of colours exhibited by WO3 coatings is due to interferometric effects. Recently, it was shown that playing with the gradient of the chemical composition of W-O layers it was possible to tune the global colour of the coatings, which made this system an attractive candidate for decorative applications.

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