Functional protective coatings of nickel-based alloys

Gerashchenkov, D. A.; Bobkova, T. I.; Vasiliev, A. F.; Кузнецов, П. А.; Samodelkin, E. A.; Farmakovsky, B. V.

doi:10.22349/1994-6716-2018-93-1-110-114

Cited by 4 publications

(4 citation statements)

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“…For streams with velocities of 300-800 m/s, it is more rational to use direct optical detection of Doppler frequency shifts of the light scattered in the stream, based on the use of ultra-high-spectral-resolution devices (at a level of 107), making it possible to highlight the particle and "catch" the reflected signal. Since the particle is moving, the reflected signal will be shifted, and analysis of how much it is shifted will determine the velocity [15,34].…”

Section: Methodsmentioning

confidence: 99%

“…Particles are transferred in a "cold" [14,15] state with transfer rates of up to 2 Mach numbers and more; •…”

mentioning

confidence: 99%

“…The limitation of this method is the use of preferentially ductile materials for the spraying and the fractional composition of no more than 60 microns, and a relatively low coefficient of use of powders (deposition efficiency) [15]. This technology has great potential in almost every field, and has found application in repair and restoration work, for the protection of welding seams, in the restoration of worn surfaces and cracks, for the metallization of ceramics, glasses and polymers, and for the generation of complex surfaces, as well as in biomedical and other applications [16][17][18].…”

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confidence: 99%

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Performance of Ni-Based Coatings with Various Additives Fabricated by Cold Gas Spraying

Alekseeva

Shishkova

Strekalovskaya

et al. 2022

Metals

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The complexity of the operating conditions in oil fields requires the development and use of materials with unique properties. This paper presents the study results for nickel-based coatings fabricated by cold gas spraying. In this study, compositions based on Ni, Ni-Cu, Ni-Zn, Ni-Al2O3/TiC coatings applied to low-alloyed steel bases were investigated. Corrosion resistance was studied by means of electrochemical autoclave testing in simulated oilfield conditions. Hydroabrasive resistance was studied using a unique testing bench. Scanning electron microscopy mappings, microhardness testing, and adhesion testing were used to correlate the results of the tests with the structure, continuity, and porosity of the studied coatings. All the studied coating specimens had a sufficiently high adhesion. The Ni-Zn coating exhibited the lowest corrosion resistance and high hydroabrasive resistance. The Ni-Cu coatings exhibited a high degree of corrosion. The Al2O3/TiC additives gave ambiguous results with respect to the studied properties. Thicknesses of 40–60 microns provided acceptable performance for the studied coatings. Thus, varying the chemical composition the thickness of coatings allows optimal qualities to be obtained for Ni-based coatings made by cold gas spraying for use in the oil and gas industry.

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Section: Methodsmentioning

confidence: 99%

“…Particles are transferred in a "cold" [14,15] state with transfer rates of up to 2 Mach numbers and more; •…”

mentioning

confidence: 99%

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confidence: 99%

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Performance of Ni-Based Coatings with Various Additives Fabricated by Cold Gas Spraying

Alekseeva

Shishkova

Strekalovskaya

et al. 2022

Metals

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“…The method of cold gas dynamic spraying or cold spraying, based on the effect of the formation of a strong metal layer when a twophase supersonic flow hits a normally located surface, is relatively economical, technological, and ecological compared to the above-mentioned methods, and therefore was used in this work [14]. The limitation of this method is the use of mainly ductile materials for spraying, and the fractional composition of no more than 60 microns and a relatively low coefficient of use of powders [15]. The technology finds an application for repair and restoration work, the protection of welding seams, and the restoration of worn surfaces and cracks.…”

Section: Introductionmentioning

confidence: 99%

Ni-Based Coatings for Oil and Gas Industry Fabricated by Cold Gas Spraying

Alekseeva

Shishkova

Strekalovskaya

et al. 2021

The 1st International Electronic Conference on Metallurgy and Metals

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This paper presents the results of the study of nickel-based coatings fabricated by cold gas spraying. In this study, compositions based on Ni, Ni–Cu, Ni–Zn, and Ni–Al2O3/TiC coatings applied to low-alloyed steel bases were investigated. The composition, type of powder (mechanical mix or mechanically alloying), and thickness varied to choose the optimal characteristics for recovery, repair procedures, and specific applications in the oil and gas industry media. The second phase was added to Ni-based coatings to increase corrosion and wear resistance. Pure nickel coatings were also studied as a benchmark. Corrosion resistance was studied by means of electrochemical testing and autoclave testing in simulated oilfield conditions. Hydroabrasive resistance was studied using a unique testing bench. Scanning electron microscopy mappings, microhardness testing, and adhesion testing were used to correlate the results of the tests with the structure, continuity, and porosity of the studied coatings. It was shown that applying mechanical alloying of the powder did not lead to an effective increase of corrosion and hydroabrasive resistance. All the studied coating specimens have a sufficiently high adhesion. Ni–Zn coating has the lowest corrosion resistance and high hydroabrasive resistance. Ni–Cu coatings have high corrosion and the lowest hydroabrasive resistance. Al2O3/TiC additives give ambiguous results in the studied properties. A thickness of 40–60 microns provides sufficient performance of the studied coatings. Thus, varying chemical composition and thickness of coatings allows for obtaining the optimal qualities of Ni-based coatings made by cold gas spraying for use in the oil and gas industry.

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