scholarly journals Multi-Walled CNT Reinforcement to Thermal Spray Coatings

2018 ◽  
Vol 7 (2) ◽  
pp. 93-98
Author(s):  
Rakesh Goyal ◽  
Buta Singh Sidhu ◽  
Vikas Chawla
Keyword(s):  
Corrosion Resistance ◽  
Protective Coatings ◽  
Composite Coatings ◽  
Thermal Spraying ◽  
Surface Protection ◽  
Spray Coatings ◽  
Wear And Corrosion ◽  
Protection Technology ◽  
Thermal And Electrical Properties ◽  
Wear And Corrosion Resistance

Thermal spraying coating techniques have emerged as very effective surface protection technology to apply protective coatings for corrosion and wear resistance applications. These coatings have gained more importance in recent past. Advances in powder and wire production have resulted in development of various types of surface coatings with excellent wear and corrosion resistance properties. Because of excellent mechanical, thermal and electrical properties of Carbon Nanotubes, CNTs reinforced composite coatings are being developed for various applications, e.g. automotive, aerospace and sports equipment industry. It is observed that if properly deposited, these CNTs ceramic composite coatings can provide improved properties like wear and corrosion resistance. It has been found that CNTs composite coatings can be successfully deposited by thermal spraying techniques, and these coatings provide better performance than conventional coatings. This paper reviews the performance of such coatings developed by various researchers.

scholarly journals Fabrication, Wear, and Corrosion Resistance of HVOF Sprayed WC-12Co on ZE41 Magnesium Alloy

Coatings ◽  
2020 ◽  
Vol 10 (5) ◽  
pp. 502 ◽  
Author(s):  
Sonia García-Rodríguez ◽  
Antonio Julio López ◽  
Victoria Bonache ◽  
Belén Torres ◽  
Joaquín Rams
Keyword(s):  
Corrosion Resistance ◽  
Magnesium Alloy ◽  
Thermal Spraying ◽  
Electrochemical Corrosion ◽  
High Energy ◽  
Wear And Corrosion ◽  
Wear And Corrosion Resistance ◽  
Oxygen Fuel ◽  
Mass Increase ◽  
Temperature Melting

This study shows that WC-12Co coatings with low porosity and high wear and corrosion resistance can be applied by high velocity oxygen-fuel (HVOF) on a low melting and highly flammable ZE41 magnesium alloy. This provides a novel and promising use of the high-energy thermal spraying technique on low temperature melting substrates. The spraying distance used was 300 mm, which is between two and three times the recommended distanced for HVOF coating with WC-12Co on steels. Despite this, the WC-12Co coatings obtained were homogeneous, crack-free, and dense. The coatings were very well adhered to the substrates and the spraying distance allowed avoiding any thermal affectation of the substrate. The thickness of the coatings was limited to 45 μm to avoid a big mass increase in the samples. The effect of the number of layers, the O2/H2 ratio and the gas transport flow in the coating was studied. The coatings reduced the wear rate of the substrate by 104 times, making them wear resistant. Electrochemical corrosion tests were conducted to study the corrosion protection of the coatings, showing that it is possible to protect the magnesium substrate for 96 h in contact with 3.5 wt.% NaCl aqueous solution.

An Overview of Alternative Coatings for Wear and Corrosion Resistance

1998 ◽  
Author(s):  
R.C. Tucker
Keyword(s):  
Corrosion Resistance ◽  
Thermal Spray ◽  
Vapor Deposition ◽  
Physical Vapor Deposition ◽  
Chemical Vapor ◽  
Thermal Spray Coatings ◽  
Spray Coatings ◽  
Wear And Corrosion ◽  
Wear And Corrosion Resistance ◽  
New Applications

Abstract Thermal spray coatings are very effective in combating wear and corrosion in many applications. New thermal spray processes and coating compositions continue to be developed with concomitant improvements in the performance of the coatings and their use in new applications. Nonetheless, the thermal spray coatings are not without competition from other coating and overlay processes and materials. This brief review considers the microstructures and the wear and corrosion resistance of a number of alternative coatings to thermal spray coatings, including physical vapor deposition, chemical vapor deposition, electroplating, autocatalytic, and laser cladding.

Sign in / Sign up

Export Citation Format

Share Document