Corrosion and Wear Study of Ni–W–B/WC Composite Coatings Electroplated by Pulse Plating

2020 ◽  
Vol 22 (11) ◽  
pp. 2000426
Author(s):  
Somayeh Ahmadiyeh ◽  
Ali Rasooli ◽  
Mir Ghasem Hosseini
Keyword(s):  
Composite Coatings ◽  
Pulse Plating ◽  
Corrosion And Wear

scholarly journals Influence of Pulse Current Forward-Reverse Duty Cycle on Structure and Performance of Electroplated W–Cu Composite Coatings

Materials ◽  
2021 ◽  
Vol 14 (5) ◽  
pp. 1233
Author(s):  
Yuchao Zhao ◽  
Nan Ye ◽  
Haiou Zhuo ◽  
Chaolong Wei ◽  
Weiwei Zhou ◽  
...  
Keyword(s):  
Composite Coating ◽  
Duty Cycle ◽  
Electrode Materials ◽  
Pulse Current ◽  
Electrical Discharge Machining ◽  
Composite Coatings ◽  
Electrical Contact ◽  
Pulse Plating ◽  
Fusion Welding ◽  
Raw Material

Tungsten-copper (W–Cu) composites are widely used as electrical contact materials, resistance welding, electrical discharge machining (EDM), and plasma electrode materials due to their excellent arc erosion resistance, fusion welding resistance, high strength, and superior hardness. However, the traditional preparation methods pay little attention to the compactness and microstructural uniformity of W–Cu composites. Herein, W–Cu composite coatings are prepared by pulse electroplating using nano-W powder as raw material and the influence of forward-reverse duty cycle of pulse current on the structure and mechanical properties is systematically investigated. Moreover, the densification mechanism of the W–Cu composite coating is analyzed from the viewpoints of forward-pulse plating and reverse-pulse plating. At the current density (J) of 2 A/dm2, frequency (f) of 1500 Hz, forward duty cycle (df) of 40% and reverse duty cycle (dr) of 10%, the W–Cu composite coating rendered a uniform microstructure and compact structure, resulting in a hardness of 127 HV and electrical conductivity of 53.7 MS/m.

Corrosion and wear resistance behavior of nano-silica epoxy composite coatings

2015 ◽  
Vol 81 ◽  
pp. 132-139 ◽  
Author(s):  
Sironmani Palraj ◽  
Muthiah Selvaraj ◽  
Kuppaianpoosari Maruthan ◽  
Gopalakrishnan Rajagopal
Keyword(s):  
Wear Resistance ◽  
Epoxy Composite ◽  
Composite Coatings ◽  
Corrosion And Wear ◽  
Nano Silica

Corrosion and Wear Response of Oxide-Reinforced Nickel Composite Coatings

2016 ◽  
Vol 25 (7) ◽  
pp. 2563-2569 ◽  
Author(s):  
Pradeep Tirlapur ◽  
M. Muniprakash ◽  
Meenu Srivastava
Keyword(s):  
Composite Coatings ◽  
Corrosion And Wear ◽  
Wear Response

Corrosion and wear resistant electrodeposited composite coatings

2005 ◽  
Vol 50 (23) ◽  
pp. 4551-4556 ◽  
Author(s):  
Maria Lekka ◽  
Niki Kouloumbi ◽  
Mauro Gajo ◽  
Pier Luigi Bonora
Keyword(s):  
Composite Coatings ◽  
Corrosion And Wear ◽  
Wear Resistant

scholarly journals The Use of Complex Additives for the Formation of Corrosion- and Wear-Resistant Epoxy Composites

2019 ◽  
Vol 2019 ◽  
pp. 1-5 ◽  
Author(s):  
Andriy Buketov ◽  
Oleksandr Sapronov ◽  
Mykola Brailo ◽  
Danylo Stukhlyak ◽  
Serhii Yakushchenko ◽  
...  
Keyword(s):  
Wear Rate ◽  
Epoxy Matrix ◽  
Epoxy Composite ◽  
Electrochemical Reaction ◽  
Composite Coatings ◽  
Corrosion And Wear ◽  
Epoxy Composites ◽  
Epoxy Binder ◽  
Water Medium ◽  
Rational Combination

The corrosion resistance and hydroabrasive resistance of the developed epoxy composite coatings are investigated in this paper. The analysis of the penetration index change after τ = 50–150 days of immersion in a water medium and 10% sulfuric acid solution is carried out. The optimal ratio of the modifier and nanodispersed (Si3N4, Al2O3, AlN, and TiN) and fibrous (viscose, polyamide, matka silk, rong, and cashmere) fillers in the epoxy binder is determined. It was allowed to slow down the process of electrochemical reaction on the metal surface. The penetration of aggressive media in such a coating during the time t = 150 days is 0.8–2.8%. It is 1.5–2 times lower than the similar indexes of the initial epoxy matrix. The rational combination of the fibrous filler (wool, acrylic PAN, and cashmere), modifier, and nanodispersed (Si3N4, AlF3, IH, and ZrH) filler in the epoxy binder is found, which allows to provide optimum indexes of wear rate. The wear rate under the action of a hydroabrasive of such a coating is I = 0.20%, which is 4 times lower than the similar indexes of the initial epoxy matrix. The wear mechanism of such coatings is caused by the physical and mechanical processes of microcutting and plastic deformation of the surface layer of the material.

Corrosion and Wear Properties of Zn-Based Composite Coatings

2020 ◽  
Vol 29 (8) ◽  
pp. 5360-5365
Author(s):  
Ion-Dragos Utu ◽  
Roxana Muntean ◽  
Ion Mitelea
Keyword(s):  
Composite Coatings ◽  
Corrosion And Wear ◽  
Wear Properties
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