scholarly journals Corrosion of One-Step Superhydrophobic Stainless-Steel Thermal Spray Coatings

2019 ◽  
Vol 12 (1) ◽  
pp. 1523-1532 ◽  
Author(s):  
Samantha Michelle Gateman ◽  
Kristopher Page ◽  
Ilias Halimi ◽  
Alexandre Romão Costa Nascimento ◽  
Sylvio Savoie ◽  
...  
Keyword(s):  
Stainless Steel ◽  
Thermal Spray ◽  
Thermal Spray Coatings ◽  
Spray Coatings ◽  
One Step

Cavitation Resistance of Thermal Spray Coatings

1997 ◽  
Author(s):  
A. Kumar ◽  
J. Boy ◽  
R. Zatorski ◽  
P. March
Keyword(s):  
Stainless Steel ◽  
Austenitic Stainless Steel ◽  
Thermal Spray ◽  
Thermal Spray Coatings ◽  
Glass Enamel ◽  
Operating Pressure ◽  
Steel Weld ◽  
Spray Coatings ◽  
Stainless Steel Weld ◽  
Austenitic Stainless Steel Weld

Abstract Cavitation and erosion damage to hydroelectric turbines and pumps can be a major problem. The effectiveness of thermal sprayed cavitation-erosion resistant coatings for hydroelectric turbine and pumps was evaluated. The coatings evaluated were applied using High Velocity Oxyfuel (HVOF) and Plasma Spray systems. Hard facing cobalt based alloys were evaluated on coupons in the laboratory. Testing was performed using a cavitating jet erosion apparatus utilizing an operating pressure of 27.6 MPa. The results were compared to welded 308 stainless steel. Cavitation resistant austenitic stainless steel weld alloys were also evaluated. The results showed that the cavitation rate of the austenitic stainless steel weld alloys were as low as one third of the rate of the 308 stainless steel. The cavitation rate of the thermally sprayed hard facing coatings were more than three times higher than the rate of the 308 stainless steel. CERHAB glass enamel coatings containing 7 wt % wollastonite fibers were successful applied by using two combustion spray processes. The applied CERHAB coatings were successfully annealed using field portable heaters and may have application as a seal coat for thermal spray coatings applied in the field.

scholarly journals Using macro and micro electrochemical methods to understand the corrosion behavior of stainless steel thermal spray coatings

2019 ◽  
Vol 3 (1) ◽  
Author(s):  
Samantha Michelle Gateman ◽  
Ilias Halimi ◽  
Alexandre Romão Costa Nascimento ◽  
Robert Lacasse ◽  
Robert Schulz ◽  
...  
Keyword(s):  
Stainless Steel ◽  
Thermal Spray ◽  
Corrosion Behavior ◽  
Electrochemical Methods ◽  
Thermal Spray Coatings ◽  
Spray Coatings

scholarly journals Sliding Wear of Conventional and Suspension Sprayed Nanocomposite WC-Co Coatings: An Invited Review

2021 ◽  
Author(s):  
R. Ahmed ◽  
O. Ali ◽  
C. C. Berndt ◽  
A. Fardan
Keyword(s):  
Wear Rate ◽  
Thermal Spray ◽  
Sliding Wear ◽  
Failure Modes ◽  
Thermal Spray Coatings ◽  
Annual Growth Rate ◽  
Total Energy Consumption ◽  
Wear Performance ◽  
Wear Rates ◽  
Spray Coatings

AbstractThe global thermal spray coatings market was valued at USD 10.1 billion in 2019 and is expected to grow at a compound annual growth rate of 3.9% from 2020 to 2027. Carbide coatings form an essential segment of this market and provide cost-effective and environmental friendly tribological solutions for applications in aerospace, industrial gas turbine, automotive, printing, oil and gas, steel, and pulp and paper industries. Almost 23% of the world’s total energy consumption originates from tribological contacts. Thermal spray WC-Co coatings provide excellent wear resistance for industrial applications in sliding and rolling contacts. Some of these applications in abrasive, sliding and erosive conditions include sink rolls in zinc pots, conveyor screws, pump housings, impeller shafts, aircraft flap tracks, cam followers and expansion joints. These coatings are considered as a replacement of the hazardous chrome plating for tribological applications. The microstructure of thermal spray coatings is however complex, and the wear mechanisms and wear rates vary significantly when compared to cemented WC-Co carbides or vapour deposition WC coatings. This paper provides an expert review of the tribological considerations that dictate the sliding wear performance of thermal spray WC-Co coatings. Structure–property relationships and failure modes are discussed to grasp the design aspects of WC-Co coatings for tribological applications. Recent developments of suspension sprayed nanocomposite coatings are compared with conventional coatings in terms of performance and failure mechanisms. The dependency of coating microstructure, binder material, carbide size, fracture toughness, post-treatment and hardness on sliding wear performance and test methodology is discussed. Semiempirical mathematical models of wear rate related to the influence of tribological test conditions and coating characteristics are analysed for sliding contacts. Finally, advances for numerical modelling of sliding wear rate are discussed.

Effects of Phosphorus and Carbon Contents on Amorphous Forming Ability in Fe-based Amorphous Alloys Used for Thermal Spray Coatings

2013 ◽  
Vol 44 (6) ◽  
pp. 2573-2580 ◽  
Author(s):  
Jeonghyeon Do ◽  
Seungmun Jung ◽  
Hyuk-Joong Lee ◽  
Byeong-Joo Lee ◽  
Gil-up Cha ◽  
...  
Keyword(s):  
Thermal Spray ◽  
Amorphous Alloys ◽  
Thermal Spray Coatings ◽  
Spray Coatings
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