Composite cobalt-based alloy for functional coatings deposition using heterophase transfer

2019 ◽  
pp. 57-63
Author(s):  
B. V. Farmakovsky ◽  
N. A. Sokolova ◽  
T. I. Bobkova
Keyword(s):  
Corrosion Resistance ◽  
Protective Coating ◽  
Functional Coatings ◽  
Precision Engineering ◽  
Class 1 ◽  
Operating Temperatures

The paper describes an alloy with a content of 20–26% Co, 17.4–21.1% Cr, 2.6–4.9% Si, 3–5% Re, 4–6% Zr, 0.2–0,6% Ce, 0.1–0.5% La, 0.3–0.7%Y, 2–4% Al. The cobalt-based alloy is applied as protective coating on components of precision engineering with adhesion 42–45 MPa, microhardness 3.6 GPa, corrosion resistance class 1, within the range of operating temperatures from –60 to 550°С.

Composite alloy based on Co–Cr–Si–Zr–TiB2–BN system for nanostructured powders and functional coatings

2019 ◽  
pp. 50-56
Author(s):  
A. N. Skvortsova ◽  
T. I. Bobkova ◽  
B. V. Farmakovsky ◽  
V. N. Klimov ◽  
A. I. Dmitryuk
Keyword(s):  
Corrosion Resistance ◽  
Composite Alloy ◽  
Functional Coatings ◽  
Nanostructured Powder ◽  
High Microhardness ◽  
Nanostructured Powders

The paper studies the preparation of a composite nanostructured powder manufactured from an alloy of Co–Cr–Si–Zr–TiB2–BN system and describes functional coatings with high microhardness and corrosion resistance based on that powder. 

Application of Supersonic Flame Spraying for Next Generation Cylinder Liner Coatings

2012 ◽  
Vol 533 ◽  
pp. 91-97 ◽  
Author(s):  
Andrei Manzat ◽  
A. Killinger ◽  
R. Gadow
Keyword(s):  
Corrosion Resistance ◽  
Surface Topography ◽  
High Performance ◽  
Combustion Engine ◽  
Cylinder Liner ◽  
Flame Spraying ◽  
Oil Consumption ◽  
Functional Coatings ◽  
Coating Materials ◽  
Cylinder Liners

Rising demands for ecologically friendly automotive engines require a significant decrease in fuel consumption and emissions. Also the recent trend of downsizing engines demands for high performance materials for internal combustion engine applications. Tribologically functional coatings applied by supersonic flame spraying help in boosting the engine efficiency by reducing the internal friction and improving the durability and wear resistance of the cylinder running surface much-needed for engine downsizing tasks together with a high corrosion resistance enabling the use of bio fuels. In addition, the tailored surface topography of the thermal spray coatings help in supporting advantageous friction states and thereby show the benefit of reducing the oil consumption resulting in reduced emissions. The thermally sprayed coatings were applied using HVOF and HVSFS processes together with a specially designed spray gun trajectory in order to achieve a fast and cost efficient coating procedure. Several different coating materials, including novel nanostructured powders, have been investigated and compared to state-of-the-art cylinder liners. The performance of the coated cylinder liners regarding wear and corrosion resistance, friction coefficient and effects of the surface topography have been investigated in various test setups including engine tests.

scholarly journals Prevention of the corrosion of trailers and trailers used in transport of road

2019 ◽  
Vol 20 (1-2) ◽  
pp. 199-202
Author(s):  
Leszek Gil ◽  
Ireneusz Pawełczak ◽  
Michał Jaczewski
Keyword(s):  
Corrosion Resistance ◽  
Corrosion Protection ◽  
Protective Coating ◽  
Road Transport ◽  
Operating Conditions ◽  
Thermal Loads ◽  
Chemical Substances ◽  
Metal Elements ◽  
Selection Of

The article discusses solutions for anti-corrosion protection of trailer and trailer’s elements. Due to the different operating conditions, the protective coating of metal elements must be resistant to chemical substances in a dry and wet environment that stimulates corrosion processes. Corrosion resistance must also be ensured on elements subjected to locally high stresses and thermal loads that prevail during the operation of trailers in road transport. The study also defines the criteria and methods for the selection of coatings to protect surfaces exposed to corrosion.

scholarly journals FUNCTIONAL ELECTROCHEMICAL COATINGS IN DUAL-USE TECHNOLOGIES

2021 ◽  
pp. 101-112
Author(s):  
Hanna Karakurkchi ◽  
Mykola Sakhnenko ◽  
Irina Yermolenko ◽  
Serhii Indykov ◽  
Natalia Horokhivska ◽  
...  
Keyword(s):  
Corrosion Resistance ◽  
Construction Materials ◽  
Low Carbon Steel ◽  
Alkaline Solutions ◽  
Toxic Substances ◽  
Low Carbon ◽  
Functional Coatings ◽  
Plasma Electrolyte ◽  
Electrochemical Coatings ◽  
Plasma Electrolytic

Technological approaches to the application of functional electrochemical coatings in civil and military technologies are analyzed. It is shown that the existing technical solutions are aimed at solving the problems of strengthening and protection of surfaces and detoxification of environments from pollutants of natural and man-made origin. Electrochemical coatings based on the iron triad, doped with refractory metals, increase corrosion resistance, microhardness and wear resistance of surfaces. Doped with transition metals heteroxide coatings, which are synthesized by the method of plasma electrolytic oxidation on aluminum and titanium alloys have catalytic properties to neutralize toxic substances in the gas and liquid phases. Peculiarities of electrochemical formation of functional coatings on construction materials of different types are investigated. It is shown that cathodic deposition by direct and pulsed current on low-carbon steel and gray cast iron forms uniform ternary coatings of Fe-Mo-W and composite systems of Fe-Co-Mo (Fe-Co-W), which have increased corrosion resistance and mechanical properties compared to base metal material. The obtained thin-layer coatings are recommended for the restoration and strengthening of worn surfaces, in particular in the technology of repair of weapons and military equipment. It was found that plasma-electrolyte treatment of piston silumin in alkaline solutions based on diphosphates synthesized heteroxide systems that are active in reducing the number of toxic emissions of internal star engines and reducing hourly fuel consumption. It is shown that nanocomposite coatings on titanium show photocatalytic activity on the destruction of model pollutants. The obtained materials have a set of enhanced functional properties and are promising for use in industrial and repair production, including the security and defense sector.

TiN Protective Coating on NdFeB by DC Magnetron Sputtering

2012 ◽  
Vol 482-484 ◽  
pp. 1130-1133
Author(s):  
Jin Long Li ◽  
Shou Dong Mao ◽  
Zhen Lun Song ◽  
Qun Ji Xue
Keyword(s):  
Corrosion Resistance ◽  
Magnetron Sputtering ◽  
Partial Pressure ◽  
Protective Coating ◽  
Nitrogen Pressure ◽  
Scratch Resistance ◽  
Nitrogen Partial Pressure ◽  
Dc Magnetron Sputtering ◽  
Tin Coating ◽  
Tin Coatings

TiN protective coating was prepared on NdFeB by DC magnetron sputtering to improve the corrosion resistance and scratch resistance of the magnetic. During deposition, the nitrogen/argon mixture gas was introduced into the chamber with the nitrogen partial pressure at 20 % and 10 % and the bias of 200 V was applied to subtract, respectively. At a lower nitrogen partial pressure of 10%, TiN coating was composed of many particles with an irregular shape. With increasing the nitrogen pressure to 20%, composing particles become small and show as the regular trihedron shape. All TiN coatings have a cubic structure. The bias makes the depositing TiN coating denser and preferential growth become no obvious. By the nitrogen partial pressure of 20 % and bias of 200 V, the dense TiN coating has best corrosion resistance and excellent wear resistance.

Effect of organoclay on structure, morphology, thermal behavior and coating performance of Jatropha oil based polyesteramide

e-Polymers ◽  
2017 ◽  
Vol 17 (6) ◽  
pp. 491-500 ◽  
Author(s):  
Manawwer Alam ◽  
Eram Sharmin ◽  
Naser M. Alandis ◽  
Naushad Ahmad
Keyword(s):  
Thermal Stability ◽  
Corrosion Resistance ◽  
Protective Coating ◽  
Tap Water ◽  
Value Added ◽  
Jatropha Oil ◽  
Coating Properties ◽  
One Pot ◽  
Corrosive Media ◽  
Structure Morphology

AbstractJatropha oil (JO) is an inedible oil mainly used in biodiesel. We have attempted to prepare a JO-based polyesteramide/clay composite using a one-pot, two-step reaction, for application as a protective coating. The aim of the work is to utilize JO for its value-added application by preparing a JO polyesteramide/clay composite, to investigate the potential of the prepared composite as a protective coating, and also to study the effect of loaded clay on the structure, morphology, thermal stability and coating properties of the composite. The formation of composites was confirmed by Fourier transform infrared spectroscopy (FTIR), transmission electron microscopy (TEM) and atomic force microscope (AFM) studies. The coating properties were studied by standard physico-mechanical and corrosion resistance tests in corrosive media (3.5 wt% HCl, 3.5 wt% NaCl and tap water). The thermal stability was assessed by differential scanning calorimetry (DSC), thermogravimetric (TGA) and derivative thermogravimetric (DTG) analyses. The coatings showed good physico-mechanical and corrosion resistance performance and can be safely used up to 275°C. The approach paves way towards an alternate value addition to a non-edible oil.

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