Use of diamond stock in chromium plating

Tikhonov, K. I.; Burkat, G. K.; Dolmatov, V. Yu.; Orlova, Elena A.

doi:10.1134/s1070427207070130

Cited by 5 publications

(6 citation statements)

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“…It has been previously shown that the inclusion of nanodiamond particles (DNA-TAN) modified with ammonia at high temperatures and pressure [1] and detonation diamond-containing carbon (DCC) in chromium coating [2][3][4] leads to a significant increase in microhardness, wear resistance, and corrosion resistance at high concentration of additives in the electrolyte (more than 10 g/l). The nature of the effect of additives on the rate and mechanism of processes occurring during the deposition of chromium, as well as on the properties of coatings is ambiguous and is determined by several factors: concentration, type and modification of the additive, electrolysis parameters [3][4][5][6][7].…”

Section: Introductionmentioning

confidence: 99%

Research of the Process of Electrochemical Deposition of Chromium in the Presence of a Composite Compound Based on Detonation Diamond-Containing Carbon

Dolmatov

2024

Univers. J. Carbon Res.

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The purpose of the study is to develop a method for obtaining high-quality electrochemical chromium coating using a new type of diamond-containing additive that has significant advantages over traditionally used detonation nanodiamonds (DNA) in the form of aqueous suspensions. Detonation diamond-containing carbon (DDC) obtained by detonation of charges from tetryl was used as an additive. DDC contains 63,0 wt. % DNA and 4.4 wt. % non-combustible impurities. We used standard chromium electrolyte: CrO3 - 250 g/l, H2SO4 – 2,5 g/l, DNA – from 0,2 to 5 g/l, traditional methodologies and algorithm of experimentation. The scope of the study is limited to the creation and application of a specific, easy to handle and prepare formulation with DDC. DDC can be added to the standard chromium electrolyte directly or in the form of freshly prepared aqueous suspension, it is environmentally safe. The originality of the work lies in the application of a cheap diamond-containing product obtained directly after the explosion of an individual explosive (tetryl) and providing stability of DDC suspensions. An increase in microhardness of wear-resistant chrome coating by 1,5 times (up to 11 GPa) and hard chrome coating by 1,7 times (up to 13,3 GPa) was achieved. The wear resistance of the obtained coatings increased by 1,9 times. Concentration (per pure detonation nanodiamond (DNA)) from 0,63 to 3,15 g/l in the electrolyte (very low).

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Section: Introductionmentioning

confidence: 99%

Research of the Process of Electrochemical Deposition of Chromium in the Presence of a Composite Compound Based on Detonation Diamond-Containing Carbon

Dolmatov

2024

Univers. J. Carbon Res.

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“…Chromium plating with diamond nanoparticles at different electrochemical conditions was studied [3]. The data published in the scientific literature on modified with nanodiamonds chromium-plated coatings and their properties are incomplete and controversial [4][5][6][7][8][9]. It has been found that they have increased microhardness and increased resistance to corrosion in hostile environment compared to non-modified chromium coating.…”

Section: Introductionmentioning

confidence: 99%

“…According to V. Y. Dolmatov et al the wear resistance of composite coatings is 13% higher [5]. On the other hand K. L. Tikhonov et al, using different diamond stock, achieve 1.4 to 1.8 times higher wear resistance [8]. There are numerous studies on the subject of various types of substrate materials coated with nanoparticles-modified coatings.…”

Section: Introductionmentioning

confidence: 99%

Effects of Diamond Nanoparticles on the Microstructure, Hardness and Corrosion Resistance of Chromium Coatings

Petkov¹,

Valov²

2020

AJCHE

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Electrodeposited coatings of chromium and diamond nanoparticles on steel were obtained. The chromium is plated directly on the steel matrix without any intermediate layers. The influence of the electrodeposition current density, the electrodeposition time and the concentration of diamond nanoparticles in the chromium-plating electrolyte on the microstructure, the phase composition, the microhardness and the corrosion resistance of the chromium coatings were investigated. The phase and chemical compositions of the composite coating (chromium and diamond nanoparticles) were examined using X-ray Diffraction (XRD) and Scanning Electron Microscopy -Energy-Dispersive X-ray Spectroscopy (SEM-EDS) techniques. The microstructure and microhardness were examined with a metallographic microscope and a microhardness tester. The corrosion resistance was investigated in 3.5 wt % NaCl solution using the gravimetric method. The bond between the chromium coating and the steel matrix has diffusion character. A sublayer of separate irregular shape formations appears at concentration of diamond nanoparticles 25 g/l and more. The formation of these structures depends only on the concentration of diamond nanoparticles and is not influenced by the other electrodeposition parameters. With the increase of the concentration of diamond nanoparticles in the electrolyte the rate of chromium coating deposition increases and respectively the thickness of the coating increases also. This increase is more than twice the thickness of chromium coating without nanodiamonds. The microhardness of the composite coatings rises also compared to unmodified chromium coating. With the increase of the concentration of the diamond nanoparticles 2 times greater microhardness is achieved and up to 5 times greater corrosion resistance compared to monochromium coating. The values of the other electroplating parameters are constant.

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“…Data on increased wear resistance at dry friction are quite diverse: 15% [2], 1.4-1.8 times [4] and up to 10 times according to the authors of the paper [8]. Nanodiamond particles added to chromium electrolyte have different origin [2][3][4][5]. The most commonly used nanodiamond particles are derived from graphite and carbon-rich organic compounds in special chambers, without heating at high pressure through the so-called "detonation synthesis" (NDDS).…”

Section: Introductionmentioning

confidence: 99%

“…Published literature essentially reflects the morphological changes of the surface and the increased values of microhardness and wear resistance of chromium coatings modified with nanodiamond particles [1][2][3][4][5][6][7][8]. The maximum increase of the composite coatings microhardness is about 2.5 times compared to the unmodified coatings [1][2][3][4][5][6]. Data on increased wear resistance at dry friction are quite diverse: 15% [2], 1.4-1.8 times [4] and up to 10 times according to the authors of the paper [8].…”

Section: Introductionmentioning

confidence: 99%

Composite Coatings of Chromium and Nanodiamond Particles on Steel

Gidikova¹,

Sułowski²,

Petkov³

et al. 2017

Archives of Metallurgy and Materials

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Chrome plating is used to improve the properties of metal surfaces like hardness, corrosion resistance and wear resistance in machine building. To further improve these properties, an electrodeposited chromium coating on steel, modified with nanodiamond particles is proposed. The nanodiamond particles (average size 4 nm measured by TEM) are produced by detonation synthesis (NDDS). The composite coating (Cr+NDDS) has an increased thickness, about two times greater microhardness and finer microstructure compared to that of unmodified chromium coating obtained under the same galvanization conditions. In the microstructure of specimen obtained from chrome electrolyte with concentration of NDDS 25 g/l or more, "minisections" with chromium shell were found. They were identified by metallographic microscope and X-ray analyser on etched section of chromium plated sample. The object of further research is the dependence of the presence of NDDS in the composite coating from the nanodiamond particles concentration in the chroming electrolyte.

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Use of diamond stock in chromium plating

Cited by 5 publications

References 0 publications

Research of the Process of Electrochemical Deposition of Chromium in the Presence of a Composite Compound Based on Detonation Diamond-Containing Carbon

Research of the Process of Electrochemical Deposition of Chromium in the Presence of a Composite Compound Based on Detonation Diamond-Containing Carbon

Effects of Diamond Nanoparticles on the Microstructure, Hardness and Corrosion Resistance of Chromium Coatings

Composite Coatings of Chromium and Nanodiamond Particles on Steel

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