IMPROVING THE CORROSION RESISTANCE OF RЕM–Fe–B MAGNETS

2021 ◽  
pp. 97-107
Author(s):  
D.S. Gorlov ◽  
◽  
I.V. Cherednichenko ◽  
R.A. Valeev ◽  
D.V. Chesnokov ◽  
...  
Keyword(s):  
Corrosion Resistance ◽  
Plasma Coating ◽  
Comparative Assessment ◽  
Vacuum Arc ◽  
Corrosion Tests ◽  
Ion Plasma ◽  
Cyclic Corrosion

The article presents the results of work on improving the corrosion resistance of magnets of the REM–Fe–B system manufactured in China, by applying an ion-plasma coating of the SDP-1T + VSDP-13 system on an industrial vacuum-arc installation MAP-3. A comparative assessment of the tread protection of the vacuum-arc coating of the SP-1T + VSP-13 system was carried out with an already applied Ni–Cu–Ni coating under conditions of accelerated cyclic corrosion tests at a temperature of 300 °C. The coating of the SDP-1T + VSDP-13 system, applied in the FSUE «VIAM», creates a much more resistant protection of the magnets of the REM–Fe–B system from corrosion compared to the electroplating of the Ni–Cu–Ni system, manufactured in China.

Experimental industrial ion-plasma plants MESh-50 and MAP-R for applying protective coatings on transport and power gas turbine components

2021 ◽  
Author(s):  
S.A. Budinovskiy ◽  
A.A. Lyapin ◽  
A.S. Benklyan
Keyword(s):  
Gas Turbine ◽  
Protective Coatings ◽  
Operating Experience ◽  
Plasma Coating ◽  
Vacuum Arc ◽  
Turbine Engines ◽  
Gas Turbine Engines ◽  
Serial Production ◽  
Ion Plasma

The paper considers selected features of the protective ion-plasma coating deposition onto large-sized gas turbine components using vacuum-arc method by means of the MESh-50 and MAP-R pilot plants. The units have been developed based on the long-term operating experience of MAP-1 (MAP-1M) serial production. These plants are widely used in Russian and international aircraft-building complexes enabling all basic ion-plasma technological processes using standard cathodes made of nickel, cobalt, aluminum alloys and pure metals (Cu, Ti, Cr, Zr, etc.). The increased dimensions of the deposition chamber and the simultaneous use of several evaporators with pipe cathodes 180 mm in diameter and 540 mm high make it possible to apply coatings to large-sized components of gas turbine engines and plants, including such complex parts as “blisk” and “blink”.

Effects of Mg Additions on Surface Morphology and Corrosion Resistance of Hot-Dipped Zn Coatings

2008 ◽  
Vol 273-276 ◽  
pp. 300-305 ◽  
Author(s):  
Lucia Suarez ◽  
Frans Leysen ◽  
C. Masquelier ◽  
D. Warichet ◽  
Yvan Houbaert
Keyword(s):  
Corrosion Resistance ◽  
Construction Material ◽  
Coating Properties ◽  
Surface Layers ◽  
Corrosion Tests ◽  
X Ray ◽  
Cyclic Corrosion ◽  
Wide Range ◽  
Excellent Method

Steel is still the main construction material for automobiles, general equipment and industrial machinery. Hot dipping has been proven to be an excellent method of corrosion protection of steels for a wide range of applications worldwide. Coatings of Zn-Al alloys on steel sheet have high corrosion resistance due to the corrosion prevention ability from Zn and the passivation of Al Bath composition, immersion velocity/time and substrate composition are the hot dipping parameters that more influence on the thickness and corrosion resistance of the deposited coating. In order to study their influence small amounts of magnesium were added. Experiments were performed in a hot dipping simulator using different substrates, bath compositions and hot dipping parameters. Surface layers were characterised by: Scanning Electron Microscopy (SEM) and Energy dispersive X-Ray spectroscopy (EDX or EDS). Cyclic corrosion tests were performed in order to observe the corrosion resistance for different Zn-Al-Mg coatings. Results show that the microstructure and composition of the substrate strongly affect the desired coating properties. Nevertheless, the influence of the magnesium on coating thickness is relevant, increasing when added in small quantities in a molten bath of Zn-5wt %Al. The quality and microstructure of the coating is affected by the amount of Mg in the bath. Cyclic corrosion tests results show that the quality of the coating is affected by the amount of Mg in the bath.

Application of Ion-Plasma Coatings with Low Droplet Phase Content

2016 ◽  
Vol 870 ◽  
pp. 334-338 ◽  
Author(s):  
N.K. Krioni ◽  
A.D. Mingazhev ◽  
I.R. Kuzeev
Keyword(s):  
Protective Coatings ◽  
Plasma Coating ◽  
Electric Arc ◽  
Vacuum Arc ◽  
Coating Materials ◽  
Coating Application ◽  
Ion Plasma ◽  
Performance Reduction ◽  
Droplet Phase

Ion-plasma coating application technologies are the most advanced ones providing high performance characteristics for the parts of modern machinery and equipment. Further development of these technologies is connected with the improvement of efficiency, production processes, and quality of protective and strengthening coatings. The methods and installations for applying protective coatings by deposition of coating materials from vacuum arc plasma with the use of electric arc evaporators of metals are widely known. However, one of the main shortcomings of the existing technologies based on the use of electric arc evaporators is a high content of the droplet phase in the coating, resulting in a sharp performance reduction. In this paper, the authors propose a new approach to the process of ion-plasma material application, providing the implementation of a number of principles that improve the quality of the applied coating due to the significant reduction of the droplet phase.

Comparative Study on the Cyclic Corrosion Test of Rail Steel U68CuCr and U75V

2012 ◽  
Vol 616-618 ◽  
pp. 1059-1062
Author(s):  
An Chao Ren ◽  
Huan Zhou ◽  
Min Zhu ◽  
Ze Xi Yuan
Keyword(s):  
Corrosion Resistance ◽  
Comparative Study ◽  
Corrosion Test ◽  
Rail Steel ◽  
Rust Layer ◽  
Corrosion Tests ◽  
Corrosion Rates ◽  
Cyclic Corrosion

A further investigation into the determination of corrosion resistance behavior has been carried out through a series of cyclic corrosion tests in order to comparatively study the corrosion rates of rail steel U68CuCr and U75V under different cycle conditions. The results indicate that U68CuCr possesses better corrosion resistance than U75V. According to macroscopic view, colors of U68CuCr surfaces are all lighter than those of U75V in the same group. Moreover, the grains at the rust layer of U68CuCr specimens show much finer and denser microstructure than U75V. Besides, cracks on the rust layer of U75V specimens are found.

Effect of the Chloride Content on the Rust Layers of 09CuPCrNi

2011 ◽  
Vol 339 ◽  
pp. 287-290
Author(s):  
Zhi Fen Wang ◽  
Li Xin Wu ◽  
Yi Qiang Sun ◽  
Rong Dong Han ◽  
Zhong Hai Yao
Keyword(s):  
Corrosion Resistance ◽  
Outer Layer ◽  
Chloride Content ◽  
Alloying Elements ◽  
Corrosion Tests ◽  
Cyclic Corrosion ◽  
Magnetite Fe3o4 ◽  
Copper Chromium

The accelerated wet-dry cyclic corrosion tests at different chloride content have been carried out on 09CuPCrNi. The morphology and composition of the rust products have been investigated. The rust layers were composed of the dense inner layer and the loose outer layer. The rust layers were mainly composed of magnetite (Fe3O4) and maghemite (γ-Fe2O3). The rust phase of -Fe2O3 was detected in higher amounts in the rust layers of 1% wt NaCl which resulted in the rust layers much denser. The alloying elements of copper, chromium and phosphorus enriched in the rust layers are helpful to the formation of γ-Fe2O3. The protective denser rust layers play an important role in corrosion resistance of the steel.

ALLVAC AC718

Alloy Digest ◽  
1991 ◽  
Vol 40 (7) ◽  
Keyword(s):  
Corrosion Resistance ◽  
Physical Properties ◽  
Tensile Properties ◽  
Heat Treating ◽  
Vacuum Arc ◽  
Vacuum Induction Melting ◽  
Induction Melting ◽  
Good Ductility

Abstract Allvac 718 is produced by vacuum induction melting followed by vacuum arc or electroslag consumable remelting. Th alloy has excellent strength and good ductility up to 1300 F (704 C). It also has excellent cryogenic properties. It has unique welding characteristics. This datasheet provides information on composition, physical properties, elasticity, and tensile properties. It also includes information on corrosion resistance as well as forming, heat treating, machining, and joining. Filing Code: Ni-394. Producer or source: Allvac Inc..

NICKELVAC X-751

Alloy Digest ◽  
1990 ◽  
Vol 39 (11) ◽  
Keyword(s):  
Corrosion Resistance ◽  
Physical Properties ◽  
Tensile Properties ◽  
Aluminum Content ◽  
Heat Treating ◽  
Vacuum Arc ◽  
Vacuum Induction Melting ◽  
Induction Melting ◽  
Service Temperature ◽  
Maximum Service Temperature

Abstract NICKEL VAC X-751 is a modification of NICKEL VAC X-750 carrying higher aluminum content (0.90-1.50 vs 0.4-1.0%). This raises the maximum service temperature 100 F(55 C) to 1600 F(871 C). NICKEL VAC X-751 has a simplified and shortened heat treating cycle relative to NICKEL VAC X-750. It is produced by vacuum induction melting followed by vacuum arc or electroslag remelting. This datasheet provides information on composition, physical properties, elasticity, and tensile properties as well as creep. It also includes information on corrosion resistance as well as forming, heat treating, machining, and joining. Filing Code: Ni-387. Producer or source: Teledyne Allvac.

UDIMET 90

Alloy Digest ◽  
1972 ◽  
Vol 21 (6) ◽  
Keyword(s):  
Corrosion Resistance ◽  
Base Alloy ◽  
Heat Treating ◽  
Vacuum Arc ◽  
Vacuum Induction Melting ◽  
Induction Melting ◽  
Nickel Base Alloy ◽  
Vacuum Arc Remelting ◽  
Temperature Performance ◽  
Nickel Base

Abstract UDIMET 90 is a nickel-base alloy developed for elevated-temperature service. It is produced by vacuum induction melting and vacuum arc remelting techniques to develop optimum properties. This datasheet provides information on composition, physical properties, elasticity, 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-174. Producer or source: Special Metals Corporation.

AL 15-7 PRECIPITATION HARDENING ALLOY

Alloy Digest ◽  
1988 ◽  
Vol 37 (6) ◽  
Keyword(s):  
Stainless Steel ◽  
Corrosion Resistance ◽  
High Temperature ◽  
Austenitic Stainless Steel ◽  
Physical Properties ◽  
Precipitation Hardening ◽  
High Strength ◽  
Heat Treating ◽  
Vacuum Arc ◽  
Temperature Performance

Abstract Allegheny Ludlum AL 15-7 Alloy is a chromium-nickel-molybdenum-aluminum semi-austenitic stainless steel. It is heat treatable to high strength and it has a moderate level of corrosion resistance. It is available both as a conventionally melted product and as vacuum arc or electroslag refined material. 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, and joining. Filing Code: SS-496. Producer or source: Allegheny Ludlum Corporation.

Sign in / Sign up

Export Citation Format

Share Document