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Corrosion Protection of Selected Aluminum Wrought Alloys applied in the Automotive Industry

Jakóbczak Karol, Kowalik Remigiusz

Archives of Metallurgy and Materials

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2023

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Vol. 68, iss. 1

287--293

EN

The paper aims to review the corrosion properties of selected aluminum alloys applied in the automotive industry which are used in heat exchangers, bodyworks and car wires. Particular attention was focused on application of selected chemical compounds which added to corrosive environment in certain amounts lead to decrease of corrosion rate of protected aluminium alloy. Considered different environmental conditions which are simulating real vehicle exploitation. At review analyzed ability to application mentioned compounds on automotive parts, because there is needed fill of following requirements: environmentally friendly, relatively inexpensive and characterized by long-term performance under certain conditions. Main conclusion of review is that there are needed extension of research regarding to application of inhibitive compounds especially on the surface of cars wires.

2

Evaluation of the corrosion resistance of spark plasma sintered stainless steel 316L matrix composites with zirconium diboride in sulfuric acid

Stępień Michał, Sulima Iwona, Hyjek Paweł, Kowalik Remigiusz

Archives of Civil and Mechanical Engineering

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2022

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Vol. 22, no. 3

art. no. e127

EN

The infuence of the zirconium diboride content and the method of initial material preparation on the corrosion properties of the composite on the 316L stainless steel matrix were determined. The powders were prepared in a Turbula mixer and a planetary mill. The corrosion properties were estimated on the basis of electrochemical tests, including open-circuit potential measurement, potentiodynamic polarization, and electrochemical impedance spectroscopy. The presence of the ceramic phase changes the corrosion resistance of the tested materials due to porosity, which afects the corrosion mechanism. The standard potentiodynamic tests do not reveal poor corrosion resistance of porous materials, and only 24 h tests reveal accurate corrosion resistance of composite materials. Composites cannot go into a stable passive state because of the penetration of electrolytes into the pores and tend to oxidize systematically. 24-h corrosion tests indicate that samples prepared in a planetary mill show better corrosion resistance than those prepared in a Turbula mixer.

3

Synthesis of conical Co–Fe alloys structures obtained with crystal modifier in superimposed magnetic field

Skibińska Katarzyna, Kutyła Dawid, Kołczyk-Siedlecka Karolina, Marzec Mateusz M., Żabiński Piotr, Kowalik Remigiusz

Archives of Civil and Mechanical Engineering

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2021

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Vol. 21, no. 4

507--517

EN

The addition of crystal modifier to electrolyte used during electrodeposition of metals and alloys allows obtaining conical structures without using any template. This method is fast and ensures covering large areas during one single electrodeposition process. In this work, Co–Fe cones were obtained by one-step method with ammonium chloride as a crystal modifier. The influence of electrodeposition parameters and electrolyte compositions were investigated. Electrodeposition conditions (duration, electrolyte temperature, and addition of NH4Cl), which allow obtaining the most uniform conical structures, were applied during sample fabrication in the magnetic field. The influence of its value and direction on the quality and compositions of obtained alloys was investigated using Scanning Electron Microscope (SEM) photos. To check if there is any change in the sample crystal system, the X-Ray Diffraction (XRD) analysis was performed. To confirm the synthesis of Co–Fe cones, they were analyzed using the X-ray photoelectron Spectroscopy (XPS) method.

4

Stopy Co-Mo, Co-Mo-C osadzane w polu magnetycznym o prostopadłej orientacji względem powierzchni elektrody

Mech Krzysztof, Żabiński Piotr, Kowalik Remigiusz, Fitzner Krzysztof

Inżynieria Materiałowa

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2013

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Vol. 34, nr 1

34--37

PL

W artykule omówiono wyniki badań dotyczących otrzymywania stopów Co- -Mo oraz Co-Mo-C na drodze elektrolizy w polu magnetycznym o wektorze indukcji magnetycznej skierowanym prostopadle do powierzchni elektrody pracującej. Pole magnetyczne o prostopadłej orientacji miało na celu wywołanie działania siły paramagnetycznej oraz siły pochodzącej od jego gradientu na jony poruszające się w polu elektrycznym. Celem badań było określenie wpływu jednorodnego pola magnetycznego na skład, strukturę oraz morfologię stopów. Szczególną uwagę poświęcono właściwościom katalitycznym stopów dla reakcji redukcji cząsteczek wody. Dodatek molibdenu oraz węgla miał na celu poprawę aktywności katalitycznej. Dodatek węgla dodatkowo miał na celu ograniczenie korozji powłoki stopowej. Własności elektrokatalityczne otrzymanych stopów w procesie wydzielania wodoru były badane w gorącym, stężonym roztworze wodorotlenku sodu. Otrzymane stopy poddano analizie rentgenowskiej (XRD) oraz analizie składu chemicznego (WDXRF). Obserwacji morfologii uzyskanych stopów dokonano za pomocą skaningowego mikroskopu elektronowego (SEM).

EN

In this work the results of studies on the electrodeposition of amorphous Co- Mo alloys in a perpendicular magnetic ﬁeld were presented. The main aim of Mo and C addition was to improve the electrocatalytic properties of Co. The aim of C addition besides the inﬁuence on the electrocatalitic properties was to limit the rate of alloy corrosion. The applied magnetic ﬁeld was used to inﬁuence the structure and morphology of the deposited alloys by paramagnetic force and gradient ﬁeld force. The electrocatalytic properties for hydrogen evolution were measured in a hot concentrated NaOH solution. The resulting alloys were analyzed by the XRD technique. A WDXRF spectroﬂuorimeter was used to conduct the elemental quantitative analysis. The morphology observations were conducted with the use of an SEM microscope Hitachi SU-70.