Effect of hydrogen peroxide on Cr oxide formation of additive manufactured CoCr alloys during plasma electrolytic polishing

Abstract The possibility of cathodic plasma electrolytic boriding of medium-carbon steel in an aqueous solution of ammonium chloride and boric acid followed by anodic plasma electrolytic polishing in an ammonium sulfate solution on the same equipment with a change in the operating voltage is shown. The morphology and roughness of the surface, microhardness of the modified layer have been investigated. Wear resistance was studied under dry friction conditions. It has been established that cathodic boriding at 850 °C for 5–30 min leads to the hardening of the surface layer up to 1050 HV with an increase in roughness by 1.5–2.5 times and wear resistance by 3.5 times. Subsequent anodic plasma electrolytic polishing of the boriding surface leads to a decrease in roughness with an increase in wear resistance by 2.3 times.

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Evolution of model roughness on quasi-pure aluminum during plasma electrolytic polishing

Surface and Coatings Technology ◽

10.1016/j.surfcoat.2021.127839 ◽

2021 ◽

pp. 127839

Author(s):

A. Spica ◽

J. Roche ◽

L. Arurault ◽

M. Horville ◽

J. Rolet

Keyword(s):

Pure Aluminum ◽

Electrolytic Polishing ◽

Plasma Electrolytic

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Corrosion behavior of additive manufactured CoCr parts polished with plasma electrolytic polishing

Surface and Coatings Technology ◽

10.1016/j.surfcoat.2020.126640 ◽

2021 ◽

Vol 406 ◽

pp. 126640

Author(s):

Bosung Seo ◽

Hyung-Ki Park ◽

Hyung Giun Kim ◽

Won Rae Kim ◽

Kwangsuk Park

Keyword(s):

Corrosion Behavior ◽

Electrolytic Polishing ◽

Plasma Electrolytic

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Plasma electrolytic polishing of nitrided steel under force convection condition

IOP Conference Series Materials Science and Engineering ◽

10.1088/1757-899x/672/1/012020 ◽

2019 ◽

Vol 672 ◽

pp. 012020 ◽

Cited By ~ 1

Author(s):

P N Belkin ◽

S A Silkin ◽

I G Dyakov ◽

I V Tambovskiy ◽

S S Korableva ◽

...

Keyword(s):

Force Convection ◽

Convection Condition ◽

Electrolytic Polishing ◽

Nitrided Steel ◽

Plasma Electrolytic

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Effect of Plasma-Electrolytic Polishing on the Corrosion Resistance of Structural Steels after Their Anodic Saturation with Nitrogen, Boron, and Carbon

Russian Journal of Electrochemistry ◽

10.1134/s1023193520040084 ◽

2020 ◽

Vol 56 (4) ◽

pp. 356-364

Author(s):

S. A. Kusmanov ◽

S. A. Silkin ◽

P. N. Belkin

Keyword(s):

Corrosion Resistance ◽

Structural Steels ◽

Electrolytic Polishing ◽

Plasma Electrolytic

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Aluminum Oxide Formation On Fecral Catalyst Support By Electro-Chemical Coating

Archives of Metallurgy and Materials ◽

10.1515/amm-2015-0161 ◽

2015 ◽

Vol 60 (2) ◽

pp. 1503-1506 ◽

Cited By ~ 1

Author(s):

H.S. Yang ◽

D.H. Jang ◽

K.J. Lee

Keyword(s):

Aluminum Oxide ◽

Catalyst Support ◽

Electric Energy ◽

Oxide Particle ◽

Process Conditions ◽

Oxide Formation ◽

Metallic Substrates ◽

Chemical Coating ◽

Catalyst Life ◽

Plasma Electrolytic

Abstract FeCrAl is comprised essentially of Fe, Cr, Al and generally considered as metallic substrates for catalyst support because of its advantage in the high-temperature corrosion resistance, high mechanical strength, and ductility. Oxidation film and its adhesion on FeCrAl surface with aluminum are important for catalyst life. Therefore various appropriate surface treatments such as thermal oxidation, Sol, PVD, CVD has studied. In this research, PEO (plasma electrolytic oxidation) process was applied to form the aluminum oxide on FeCrAl surface, and the formed oxide particle according to process conditions such as electric energy and oxidation time were investigated. Microstructure and aluminum oxide particle on FeCrAl surface after PEO process was observed by FE-SEM and EDS with element mapping analysis. The study presents possibility of aluminum oxide formation by electro-chemical coating process without any pretreatment of FeCrAl.

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