scholarly journals Electrodeposition of Graphene Oxide Modified Composite Coatings Based on Nickel-Chromium Alloy

Crystals ◽  
2021 ◽  
Vol 11 (4) ◽  
pp. 415
Author(s):  
Vitaly Tseluikin ◽  
Asel Dzhumieva ◽  
Andrey Yakovlev ◽  
Anton Mostovoy ◽  
Marina Lopukhova
Keyword(s):  
Graphene Oxide ◽  
Composite Coatings ◽  
Cathodic Current Density ◽  
Multilayer Graphene ◽  
Chromium Alloy ◽  
Cathodic Current ◽  
Electrodeposition Process ◽  
Nickel Chromium ◽  
Electrochemical Coatings ◽  
Laser Microspectral Analysis

Composite electrochemical coatings (CECs) based on nickel-chromium alloy and modified with multilayer graphene oxide (GO) were obtained. The electrodeposition process of these coatings was studied in the potentiodynamic mode. The structure and the composition of nickel–chromium–GO CECs were studied by scanning electron microscopy and laser microspectral analysis. Nickel–chromium–GO CECs are dense and uniform. The carbon content in them increases when moving from the substrate to the surface. It was established that the addition of GO particles into the composition of electrolytic coatings with a nickel-chromium alloy results in the increase in their microhardness from 4423–5480 MPa to 6120–7320 MPa depending on the cathodic current density.

scholarly journals Electrodeposition and Corrosion Properties of Nickel–Graphene Oxide Composite Coatings

Materials ◽  
2021 ◽  
Vol 14 (19) ◽  
pp. 5624
Author(s):  
Vitaly Tseluikin ◽  
Asel Dzhumieva ◽  
Andrey Yakovlev ◽  
Anton Mostovoy ◽  
Svetlana Zakirova ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Composite Coatings ◽  
Multilayer Graphene ◽  
Nacl Solution ◽  
Corrosion Properties ◽  
X Ray ◽  
Nickel Deposits ◽  
Electrochemical Coatings ◽  
Electrolysis Mode ◽  
Corrosion Electrochemical Behavior

Nickel-based composite electrochemical coatings (CEC) modified with multilayer graphene oxide (GO) were obtained from a sulfate-chloride electrolyte in the reverse electrolysis mode. The microstructure of these CECs was investigated by X-ray phase analysis and scanning electron microscopy. The corrosion-electrochemical behavior of nickel–GO composite coatings in a 0.5 M solution of H2SO4was studied. Tests in a 3.5% NaCl solution showed that the inclusion of GO particles into the composition of electrolytic nickel deposits makes their corrosion rate 1.40–1.50 times less.

Effect Of Cathodic Current Density on Microstructure and Properties of Nickel Composite Coatings

2014 ◽  
Vol 59 (1) ◽  
pp. 323-327
Author(s):  
M. Nowak ◽  
M. Opyrchał ◽  
S. Boczkal ◽  
J. Zelechowski ◽  
A. Najder ◽  
...  
Keyword(s):  
Volume Fraction ◽  
Composite Coatings ◽  
Cathodic Current Density ◽  
High Current ◽  
Good Adhesion ◽  
Cathodic Current ◽  
Dispersed Particles ◽  
Structure Thickness ◽  
Watts Bath ◽  
Current Densities

Abstract Studies were carried out to characterise the nickel composite coatings deposited on a 2xxx series aluminium alloy. The composite coatings were prepared in a Watts bath with the addition of fine-dispersed particles of Al2O3 powder introduced in an amount of 100 g/l using current densities of 2, 4, 6 and 8 A/dm2. The morphology, structure, thickness and microhardness of the obtained composite coatings were described. The volume fraction of Al2O3 particles in composite coating was determined. The corrosion resistance of thus produced coatings was examined. Based on the results of the conducted studies it was stated that all the produced coatings were characterised by good adhesion to the substrate, but coatings produced at high current densities were characterised by a lower content of the Al2O3 reinforcing phase present in the composite.

Graphene oxide supported cobalt phosphide nanorods designed from a molecular complex for efficient hydrogen evolution at low overpotential

2019 ◽  
Vol 55 (15) ◽  
pp. 2186-2189 ◽  
Author(s):  
Alpesh K. Sharma ◽  
Hemant Joshi ◽  
Kasinath Ojha ◽  
Ajai K. Singh
Keyword(s):  
Graphene Oxide ◽  
Hydrogen Evolution ◽  
Current Density ◽  
Molecular Complex ◽  
Cathodic Current Density ◽  
Cathodic Current ◽  
Cobalt Phosphide ◽  
Low Overpotential

The cathodic current density (cd) of GO-Co2P is 20/100 mA cm−2 at an overpotential of 80/154 mV. At 100 mA cm−2 cd, stability is observed for 70 h.

scholarly journals Effect of Al2O3 Ceramic Particles on Corrosion Behaviour and Tribological Properties of Nickel Composite Coatings

2016 ◽  
Vol 61 (1) ◽  
pp. 195-198 ◽  
Author(s):  
M. Nowak ◽  
A. Najder ◽  
M. Opyrchał ◽  
S. Boczkal ◽  
J. Żelechowski ◽  
...  
Keyword(s):  
Tribological Properties ◽  
Corrosion Behaviour ◽  
Composite Coatings ◽  
Bath Temperature ◽  
Cathodic Current Density ◽  
Cathodic Current ◽  
Corrosion Properties ◽  
Ceramic Particles ◽  
Dispersed Particles ◽  
Watts Bath

The paper presents a study on corrosion behaviour and tribological properties of nickel composite coatings deposited by electrochemical method on aluminium alloy from 2xxx series (AlCu4MgSi). The nickel composite coatings were produced in a Watts bath of the following chemical composition: NiSO4·7H2O 150 g/l, NiCl2·6H2O 30 g/l, H3BO3 30 g/l with the addition of saccharin in an amount of 2 g/l. As hard ceramic dispersed particles embedded in the coating, alumina (Al2O3) was used in an amount of 12,5; 25; 50 and 75 g/l. Coatings were produced using cathodic current density of 6 A/dm2, bath temperature of 60°C, pH 4, and the time 60 minutes. The electroplating bath was stirred with a mechanical stirrer (350 rpm). The results obtained were compared with a nickel coating deposited without the ceramic particles. It was found that the presence of Al2O3 increases the wear resistance of composite coatings, but does not significantly improve the corrosion properties.

INCONEL ALLOY X-750

Alloy Digest ◽  
1966 ◽  
Vol 15 (7) ◽  
Keyword(s):  
Gas Turbines ◽  
Rupture Strength ◽  
Low Cost ◽  
High Strength ◽  
Heat Treating ◽  
Chromium Alloy ◽  
Cryogenic Temperatures ◽  
Inconel Alloy ◽  
Nickel Chromium ◽  
Corrosion And Oxidation

Abstract INCONEL alloy X-750 is an age-hardenable, nickel-chromium alloy used for its corrosion and oxidation resistance and high creep rupture strength at temperature up to 1500 F. It also has excellent properties at cryogenic temperatures. It was originally developed for use in gas turbines, but because of its low cost, high strength and weldability it has become the standards choice for a wide variety of applications. This datasheet provides information on composition, physical properties, elasticity, and tensile properties as well as creep and fatigue. It also includes information on forming, heat treating, machining, joining, and surface treatment. Filing Code: Ni-115. Producer or source: Huntington Alloy Products Division, An INCO Company.

INCONEL ALLOY 671

Alloy Digest ◽  
1972 ◽  
Vol 21 (10) ◽  
Keyword(s):  
Corrosion Resistance ◽  
High Temperature ◽  
Physical Properties ◽  
Surface Treatment ◽  
Heat Treating ◽  
High Temperature Corrosion ◽  
Chromium Alloy ◽  
Inconel Alloy ◽  
Nickel Chromium ◽  
Temperature Performance

Abstract INCONEL ALLOY 671 is a nickel-chromium alloy having excellent resistance to high-temperature corrosion. This datasheet provides information on composition, physical properties, hardness, and tensile properties as well as creep. It also includes information on high temperature performance and corrosion resistance as well as forming, heat treating, machining, joining, and surface treatment. Filing Code: Ni-180. Producer or source: Huntington Alloy Products Division, An INCO Company.

SANICRO 31

Alloy Digest ◽  
1965 ◽  
Vol 14 (9) ◽  
Keyword(s):  
Mechanical Properties ◽  
Petrochemical Industry ◽  
Elevated Temperatures ◽  
Heat Treating ◽  
Chromium Alloy ◽  
Good Resistance ◽  
Nickel Chromium ◽  
Temperature Performance ◽  
Iron Nickel ◽  
Corrosion And Oxidation

Abstract SANDVIK SANICRO 31 is an iron-nickel-chromium alloy having good resistance to corrosion and oxidation and good mechanical properties at elevated temperatures. It is recommended for electrical sheathing, pyrometer tubes, equipment for heat treating and furnace tubes and other equipment in the petrochemical industry. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties. It also includes information on high temperature performance and corrosion resistance as well as forming, heat treating, machining, joining, and surface treatment. Filing Code: SS-172. Producer or source: Sandvik.

scholarly journals Electrodeposition of Copper and Brass Coatings with Olive-Like Structure

Materials ◽  
2021 ◽  
Vol 14 (7) ◽  
pp. 1762
Author(s):  
Artur Maciej ◽  
Natalia Łatanik ◽  
Maciej Sowa ◽  
Izabela Matuła ◽  
Wojciech Simka
Keyword(s):  
Corrosion Resistance ◽  
Cathodic Current Density ◽  
Bath Composition ◽  
Cathodic Current ◽  
Corrosion Properties ◽  
Fine Grained ◽  
Electrodeposited Coating ◽  
Copper Zinc ◽  
New Generation ◽  
First Time

One method of creating a brass coating is through electrodeposition, which is most often completed in cyanide galvanic baths. Due to their toxicity, many investigations focused on the development of more environmentally friendly alternatives. The purpose of the study was to explore a new generation of non-aqueous cyanide-free baths based on 1-ethyl-3-methylimidazolium acetate ionic liquids. The study involved the formation of copper, zinc, and brass coatings. The influence of the bath composition, cathodic current density, and temperature was determined. The obtained coatings were characterized in terms of their morphology, chemical composition, phase composition, roughness, and corrosion resistance. It was found that the structure of the obtained coatings is strongly dependent on the process parameters. The three main structure types observed were as follows: fine-grained, porous, and olive-like. To the best knowledge of the authors, it is the first time the olive-like structure was observed in the case of an electrodeposited coating. The Cu-Zn coatings consisted of 19–96 at. % copper and exhibited relatively good corrosion resistance. A significant improvement of corrosion properties was found in the case of copper and brass coatings with the olive-like structure.

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