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Tytuł:
Ethanol oxidation reaction at Pd-modified nickel foam obtained by PVD method
Autorzy:
Mikołajczyk, T.
Turemko, M.
Pierożyński, B.
Powiązania:
https://bibliotekanauki.pl/articles/949482.pdf
Data publikacji:
2015
Wydawca:
Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
Tematy:
PVD
nickel foam
electrochemical impedance spectroscopy
Opis:
In this study, palladium-modified nickel foam substrate was applied to examine ethanol oxidation reaction (EOR) in 0.1 M NaOH supporting solution. An EOR catalyst was prepared by physical vapour deposition (PVD) of palladium onto Ni foam material. Temperature-dependent kinetics of the EOR were studied over the temperature range: 20-60°C by means of a.c. impedance spectroscopy and cyclic voltammetry techniques. Deposition of a noble metal additive was clearly exposed through scanning electron microscopy: SEM/EDX-supported analysis. Most importantly, this work investigated the effect of pre-deposited fullerene on nickel foam, on the catalytic (EOR) properties of such-produced Ni foam/Pd composite material.
Źródło:
Polish Journal of Chemical Technology; 2015, 17, 2; 47-50
1509-8117
1899-4741
Pojawia się w:
Polish Journal of Chemical Technology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A Fast Method of Identifying Rechargeable Batteries Condition and Defects
Autorzy:
Kuliński, K.
Nowrot, A.
Powiązania:
https://bibliotekanauki.pl/articles/2064967.pdf
Data publikacji:
2018
Wydawca:
STE GROUP
Tematy:
lithium-ion batteries
electrochemical impedance spectroscopy
Opis:
The paper presents fast method of identifying industrial and general use rechargeable batteries condition and defects exemplary lithium-ion cells. The proposed method is based on measuring a internal battery electrical impedance for selected frequency points and the next the results are compare with reference characteristics. Diagnostic process is performed for a few minutes when the battery is charging or discharging. So far used, the most popular methods require controlled charging and discharging cells to determine approximately of their capacity and need a long time of the diagnostic process (about few hours to over a dozen hours). The new method allows the dramatically reduction of measurement time and in effect reduces financial work costs of service. The paper shows a various setup systems with commonly use RLC impedance bridges were used in the research. The analysis of measurements allowed to determine the specific spectral function, which indicates rechargeable battery condition. Moreover, it is also possible to apply the obtain method to another electrochemical cell type.
Źródło:
Multidisciplinary Aspects of Production Engineering; 2018, 1, 1; 301--305
2545-2827
Pojawia się w:
Multidisciplinary Aspects of Production Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Effect of Cold Rolling on Electrochemical Impedance Behavior of New β-Type Ti-6Mo-6V-5Cr-3Sn-2.5Zr Alloy
Autorzy:
Song, Hocheol
Zakiyuddin, Ahmad
Kim, Sinhye
Lee, Kwangmin
Powiązania:
https://bibliotekanauki.pl/articles/351262.pdf
Data publikacji:
2019
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
beta-titanium alloy
electrochemical impedance spectroscopy
potentiodynamic polarization
Opis:
In this study, the corrosion properties of Ti-6Mo-6V-5Cr-3Sn-2.5Zr alloy were investigated as a function of the cold rolling ratio and annealing temperature. The annealing treatment was carried out at temperature of 680°C, 730°C, and 780°C. The highest corrosion potential observed in the specimen with a 10% rolling ratio was 179 mV, which was more positive than that of the nonrolled specimen (–0.214 VSSC). The lowest corrosion current density (1.30×10-8 A/cm2) was observed in the non-rolled specimen which suggested that the integrity of its passive oxide layer was superior to that of the cold-rolled specimens. Time-dependent EIS evaluation revealed that the consistency of the passive oxide layer was highly affected by the subjected rolling ratio over time.
Źródło:
Archives of Metallurgy and Materials; 2019, 64, 2; 487-490
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Kinetics of electrooxidation of phenol on polycrystalline platinum
Autorzy:
Pierożyński, B.
Piotrowska, G.
Mikołajczyk, T.
Powiązania:
https://bibliotekanauki.pl/articles/779691.pdf
Data publikacji:
2015
Wydawca:
Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
Tematy:
Phenol electrooxidation
PhER
polycrystalline Pt
electrochemical impedance spectroscopy
Opis:
This work reports on kinetics of phenol electrooxidation reaction (PhER), examined at polycrystalline Pt electrode in 0.5 M H2SO4 and 0.1 M NaOH supporting solutions. Important aspects of PhER kinetics were analysed based on potential-dependent, a.c. impedance-derived values of charge-transfer resistance and capacitance parameters. Special attention was also given to the influence of supporting electrolyte ions on the process of phenol oxidation (pH dependence of the PhER), in relation to an important role of anion adsorption on the Pt catalyst surface.
Źródło:
Polish Journal of Chemical Technology; 2015, 17, 2; 126-130
1509-8117
1899-4741
Pojawia się w:
Polish Journal of Chemical Technology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Application of EIS technique to investigate the adsorption of different types of depressants on pyrite
Autorzy:
Ertekin, Zeliha
Pekmez, Kadir
Kappes, Ronel
Ekmekçi, Zafir
Powiązania:
https://bibliotekanauki.pl/articles/1447279.pdf
Data publikacji:
2021
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
pyrite
depressants
collector
mineral electrodes
electrochemical impedance spectroscopy
Opis:
Batch scale flotation tests are generally performed for testing effects of flotation reagents on flotation performance. This method becomes costly and time-consuming for testing a number of flotation reagents such as collectors, depressants and activators. Therefore, developing alternative lowcost, fast and sensitive methods have recently been the subject of intense research to obtain a better flotation performance. The electrochemical techniques have been used for the surface characterization of sulfide minerals. Electrochemical Impedance Spectroscopy (EIS) is one of these techniques that can provide significant information related to surface characteristics, reagent adsorption on the sulfide minerals. In this study, EIS was used as an alternative technique to the conventional batch scale flotation tests for pre-screening of various flotation reagents using two pyrite samples containing different contents of Au and As. Sodium cyanide (NaCN), sodium metabisulfite (SMBS), and a polymeric depressant Aero 7261A were tested as depressants for two pyrite samples (Sample A from a Carlintrend ore and Sample B from a Sulfidic ore from South America) having different electrochemical characteristics. EIS results showed that the effects of the sequence of addition of collector (Potassium amyl xanthate - KAX) and depressant were also investigated to evaluate the stability of depressant and collector compounds formed at the surface. The sequence of addition of the collector and depressants was significant for Sample A but not for Sample B. The results show that EIS can be used as an effective tool for testing the performance of various flotation reagents and their mixtures on sulfide minerals.
Źródło:
Physicochemical Problems of Mineral Processing; 2021, 57, 3; 112-126
1643-1049
2084-4735
Pojawia się w:
Physicochemical Problems of Mineral Processing
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Selective Corrosion of Al2Cu Intermetallic Phase in Orthophosphoric Acid Aqueous Solutions
Autorzy:
Kwolek, P.
Gradzik, A.
Szeliga, D.
Kościelniak, B.
Powiązania:
https://bibliotekanauki.pl/articles/351947.pdf
Data publikacji:
2019
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
intermetallic phase
selective corrosion
orthophosphoric acid
electrochemical impedance spectroscopy
Opis:
Al2Cu phase has been obtained by melting pure metals in the electric arc furnace. It has been found that the intermetallic phase undergoes selective corrosion in the H3PO4 aqueous solutions. Aluminium is dissolved, the surface becomes porous and enriched with copper. The corrosion rate equals to 371 ±17 g∙m-2∙day-1 (aerated solution) and 284 ± 9 g∙m-2∙day-1 (deaerated solution). The surface of Al2Cu phase after selective corrosion was characterised by using electrochemical impedance spectroscopy. It was found that the surface area of the specimens increases with temperature due to higher corrosion rate and is between 2137 and 3896 cm2.
Źródło:
Archives of Metallurgy and Materials; 2019, 64, 4; 1223-1229
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
EIS research of AW - 7020 alloy joints welded by MIG
Autorzy:
Dudzik, K.
Charchalis, A.
Powiązania:
https://bibliotekanauki.pl/articles/248097.pdf
Data publikacji:
2012
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Tematy:
electrochemical impedance spectroscopy (EIS)
aluminium alloys
MIG welding
corrosion
Opis:
The results of corrosion properties research of aluminum alloy AW 7020 (AlZn5Mg1) welded by MIG were presented. In the article the parameters for MIG welding of sheets made of AlZn5Mg1 (7020) alloy was presented. Metallographic analysis of bonds showed a proper structural construction MIG welded 7020 aluminum alloy. EIS measurement was performed in three electrode system in artificial seawater (3.5% NaCl). Impedance studies were carried out at the corrosion potential. Changed voltage signal amplitude in the range plus or minus 10 mV and frequency range of changes was as follows: 100 kHz - 0.1 Hz. Atlas 0531 EU and IA potentiostat was used for studies. Model in the form of an electrical equivalent circuit replacement was chosen for the test object. The results of electrochemical impedance spectroscopy are presented graphically in the Nyquist charts matched with the theoretical curve to them and in the form of parameters characterizing the corrosion process. Obtained results were statistically analyzed. Much better resistance to electrochemical corrosion was found for the native material then joint welded by MIG of 7020 aluminum alloy. The most important parameter - charge transfer resistance value of a double layer Rct for sample of native material is higher than for the sample welded by MIG. Original value is received results of the corrosion properties of MIG welded AlZn5Mg1 alloy compared with the native material.
Źródło:
Journal of KONES; 2012, 19, 1; 83-88
1231-4005
2354-0133
Pojawia się w:
Journal of KONES
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Corrosive properties distribution in AW-7020 alloy joints welded by FSW
Autorzy:
Dudzik, K.
Powiązania:
https://bibliotekanauki.pl/articles/247352.pdf
Data publikacji:
2014
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Tematy:
electrochemical impedance spectroscopy
EIS
friction stir welding
FSW
welding
corrosion
Opis:
The results of corrosion properties research of aluminum alloy AW 7020 (AlZn5Mg1) welded by Friction Stir Welding were presented. In the article the parameters for friction stir welding of sheets made of AlZn5Mg1 (7020) alloy were presented. Corrosion tests were performed on the surface of the FSW joined sheets depending on the distance from the centre of the weld. EIS measurement was performed in three-electrode system in an artificial seawater (3.5% NaCl). Impedance studies were carried out at the corrosion potential. Changed voltage signal amplitude in the range ± 10 mV and frequency range of changes was as follows: 100 kHz - 0.1 Hz. Atlas 0531 EU & IA potentiostat was used for studies. Model in the form of an electrical equivalent circuit replacement was chosen for the test object. The results of electrochemical impedance spectroscopy are presented graphically in the Nyquist charts matched with the theoretical curve to them and in the form of parameters characterizing the corrosion process. Obtained results were statistically analysed. Better resistance to electrochemical corrosion was found for the native material then joint welded by FSW of 7020 aluminum alloy. Worse corrosion properties were observed in the advancing side of the weld than in the retreating side of the weld. Original value are received results of the corrosion properties distribution of FSW welded AW-7020 aluminium alloy.
Źródło:
Journal of KONES; 2014, 21, 4; 79-85
1231-4005
2354-0133
Pojawia się w:
Journal of KONES
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Loading Effect of Ag Nanoparticles on Photocatalytic Activity of TiO2 Nanorod Arrays Prepared by Hydrothermal Method
Autorzy:
Lee, Kwangmin
Yoo, Daeheung
Zakiyuddin, Ahmad
Powiązania:
https://bibliotekanauki.pl/articles/2049271.pdf
Data publikacji:
2021
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
TiO2 nanorods
Ag nanoparticles
hydrothermal
Electrochemical impedance spectroscopy
UV-Vis spectroscopy
Opis:
Rutile-TiO2 nanorod thin films were formed on Ti disks via alkali treatment in NaOH solutions followed by heat treatment at 700°C. Ag nanoparticles were loaded on nanorods using a photo-reduction method to improve the photocatalytic properties of the prepared specimen. The surface characterization and the photo-electrochemical properties of the Ag-loaded TiO2 nanorods were investigated using a field-emission scanning electron microscope (FE-SEM), X-ray photoelectron spectroscopy (XPS), UV-Vis spectroscopy and electrochemical impedance spectroscopy (EIS). The TiO2 nanorods obtained after the heat treatment were 80 to 180 nm thick and 1 μm long. The thickness of the nanorods increased with the NaOH concentration. The UV-Vis spectra exhibit a shift in the absorption edge of the Ag-loaded TiO2 to the visible light range and further narrowing of the bandgap. The decrease in the size of the capacitive loops in the EIS spectra showed that the Ag loading effectively improved the photocatalytic activity of the TiO2 nanorods.
Źródło:
Archives of Metallurgy and Materials; 2021, 66, 3; 751-754
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Physicochemical analysis of phosphatidylcholine-ceramide system in bilayer lipid membranes
Autorzy:
Naumowicz, Monika
Petelska, Aneta
Figaszewski, Zbigniew
Powiązania:
https://bibliotekanauki.pl/articles/1040678.pdf
Data publikacji:
2008
Wydawca:
Polskie Towarzystwo Biochemiczne
Tematy:
equilibrium
ceramide
complex formation
electrochemical impedance spectroscopy
phosphatidylcholine
bilayer lipid membrane
Opis:
Electrochemical impedance spectroscopy was used for the study of two-component lipid membranes. Phosphatidylcholine and ceramide were to be investigated, since they play an important biochemical role in cell membranes. The research on biolipid interaction was focused on quantitative description of processes that take part in a bilayer. Assumed models of interaction between amphiphilic molecules and the equilibria that take place there were described by mathematical equations for the studied system. The possibility of complex formation for two-component system forming bilayers was assumed that could explain the deviation from additivity rule. Equilibria were described by mathematical equations that were further verified experimentally. The determined values of parameters (stability constant, molecular area of complex, capacitance and conductance of the lipid membranes formed from molecules and complexes) were used for calculation of model curves. The comparison of model curves and experimental points verified the assumed model.
Źródło:
Acta Biochimica Polonica; 2008, 55, 4; 721-730
0001-527X
Pojawia się w:
Acta Biochimica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Sustainable use of Natural Resources as Alternative for the Hazardous Corrosion Inhibitor of Mild Steel/Dilute Sulfuric Acid Interface: Weight Loss, EIS, AFM and FTIR Studies
Autorzy:
Tezeghdenti, M.
Etteyeb, N.
Dhouibi, L.
Kanoun, O.
Powiązania:
https://bibliotekanauki.pl/articles/351244.pdf
Data publikacji:
2018
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
Acacia Cyanophylla
inhibition
corrosion
mild steel
electrochemical impedance spectroscopy
adsorption
AFM
Opis:
Point of present exploration was to figure out the anticorrosion activity of Acacia Cyanophylla (Saligna leaves) extract on the corrosion of mild steel in dilute sulfuric acid medium, using weight loss measurements and electrochemical impedance spectroscopy. The result of the study revealed that the extract act as a potent inhibitor on mild steel in acid medium. The increase in inhibitor concentration and immersion time showed a positive effect on inhibition efficiency. EIS exhibited one capacitive loop which indicates that the corrosion reaction is controlled by charge transfer process. The increase of phase shift (n) in presence of (ACLE) lower surface roughness. This change reveals the adsorption of the inhibitor compound on the steel surface. According to the results of weight loss measurements, the adsorption of the extract on the steel surface can be described by the Langmuir isotherm. The inhibition mechanism of (ACLE) molecules involves physical interaction between the inhibitor and metal surface. Additionally, Protective film formation against acid attack was confirmed by FT-IR and AFM techniques.
Źródło:
Archives of Metallurgy and Materials; 2018, 63, 2; 697-707
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Effect of Na3VO4 Inhibitor on the Corrosion Resistance of Al2Cu Intermetallic Phase in H3PO4 Aqueous Solution
Autorzy:
Kwolek, P.
Powiązania:
https://bibliotekanauki.pl/articles/354857.pdf
Data publikacji:
2020
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
intermetallic phase
selective corrosion
orthophosphoric acid
electrochemical impedance spectroscopy
sodium orthovanadate
Opis:
Sodium orthovanadate was tested as a corrosion inhibitor of intermetallic Al2Cu in 1 M H3PO4. The Al2Cu–H3PO4–Na3VO4system was studied using the following methods: inductively coupled plasma optical emission spectrometry, scanning electron microscopy with energy dispersive x-ray spectroscopy, x-ray diffraction, electrochemical impedance spectroscopy, polarisation and open circuit potential. It was found that the corrosion rate decreased as the inhibitor concentration increased. The highest inhibition efficiency 99% was obtained when sodium orthovanadate initial concentration was equal to 100 mM, pH = 1.11, due to precipitation of a protective layer of insoluble salt, containing vanadium, phosphorus, sodium and oxygen, on the surface. At pH = 0.76 the protective layer was not formed and inhibition efficiency decreased to 76%. Selective corrosion of the intermetallic phase caused a significant increase of an electric double layer capacitance and decrease of a charge transfer resistance.
Źródło:
Archives of Metallurgy and Materials; 2020, 65, 1; 175-183
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Influence of Friction Stir Welding (FSW) on mechanical and corrosion properties of AW-7020M and AW-7020 alloys
Autorzy:
Dudzik, K.
Jurczak, W.
Powiązania:
https://bibliotekanauki.pl/articles/260119.pdf
Data publikacji:
2016
Wydawca:
Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
Tematy:
Al alloys
mechanical properties
electrochemical impedance spectroscopy (EIS)
corrosion
FSW
friction welding
Opis:
Friction welding associated with mixing the weld material (FSW - Friction Stir Welding ) is an alternative to MIG and TIG welding techniques for Al-alloys. This paper presents experimental results obtained from static tension tests on specimens made of AW-7020M and AW-7020 alloys and their joints welded by using FSW method carried out on flat specimens, according to Polish standards : PN-EN ISO 4136:2011 and PN-EN ISO 6892-1:2010. Results of corrosion resistance tests are also presented. The tests were performed by using the electrochemical impedance spectroscopy (EIS). EIS measurement was conducted with the use of three-electrode system in a substitute sea water environment (3,5% NaCl - water solution). The impedance tests were carried out under corrosion potential. Voltage signal amplitude was equal to 10mV, and its frequency range - 100 kHz ÷ 0,1 Hz. Atlas 0531 EU&IA potentiostat was used for the tests. For the tested object an equivalent model was selected in the form of a substitute electric circuit. Results of the impedance spectroscopy tests are presented in the form of parameters which characterize corrosion process, as well as on Nyquist’s graphs together with the best-fit theoretical curve. Analysis of the test results showed that the value of charge transfer resistance through double layer , Rct , for the FSW- welded specimen , was lower than that for the basic material, and that much greater difference was found in the case of AW-7020M alloy. The impedance spectroscopy tests showed that both the FSW-welded joints and basic material of AW-7020M and AW-7020 alloys were characterized by a good resistance against electrochemical corrosion in sea water environment , and that FSW –welded joints revealed a greater corrosion rate. The performed tests and subject-matter literature research indicate that application of FSW method to joining Al-alloys in shipbuilding is rational.
Źródło:
Polish Maritime Research; 2016, 3; 86-90
1233-2585
Pojawia się w:
Polish Maritime Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Badanie właściwości olejów napędowych metodą elektrochemicznej spektroskopii impedancyjnej
Evaluation of diesel fuel properties using electrochemical impedance spectroscopy
Autorzy:
Macioszek, Ł.
Mazur, K.
Powiązania:
https://bibliotekanauki.pl/articles/158236.pdf
Data publikacji:
2014
Wydawca:
Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:
spektroskopia impedancyjna
obwód zastępczy
olej napędowy
electrochemical impedance spectroscopy
equivalent circuit
diesel fuel
Opis:
W pracy podjęto próbę zbadania olejów napędowych metodą elektrochemicznej spektroskopii impedancyjnej. Materiałem do badań było pięć próbek zimowych olejów napędowych typu premium, zakupionych na stacjach różnych dostawców. Na podstawie wyników pomiaru impedancji stworzono elektryczny obwód zastępczy dla celki z olejem napędowym, a następnie wyznaczono wartości elementów modelu dla przebadanych próbek. Dokonano oceny jakości przyjętych modeli na podstawie parametru χ2 oraz błędów dopasowania poszczególnych elementów. Uzyskane wyniki pozwalają stwierdzić, że metoda spektroskopii impedancyjnej może pozwolić na badanie niektórych właściwości olejów napędowych metodami elektrochemicznymi. Zauważalne jest zróżnicowanie otrzymywanych wyników w zależności od dostawcy, a co za tym idzie składu chemicznego badanego oleju napędowego.
In the paper there is made an attempt to evaluate diesel fuels using electrochemical impedance spectroscopy (EIS) and to verify experimentally that it can be used to characterize these fuels. Five samples of winter premium diesels from different vendors were examined. The impedance of diesel fuels was measured in the frequency range of 0.01 Hz - 5 kHz with the use of the Princeton Applied Research laboratory system for EIS. The measurement results are presented in the form of Bode plot in Fig. 2 and Nyquist plot in Fig. 3. A commonly used electrical equivalent circuit for the measuring cell (Fig. 1) was modified according to the collected measurements. Diesel fuels can be treated as dielectrics, hence a better representation of their electrochemical nature can be modeled without RΩ element in their equivalent circuit. Then, using the EIS Spectrum Analyzer the values of the circuit elements were fitted to the measurement results. The fitting results and modeling errors are presented in Table 1. The quality of fitted values was evaluated by both χ2 coefficient and relative errors of individual components. The test findings show that EIS can be used to determine some of the electrochemical properties of diesel fuels. One can note a diversity in the obtained results that depend on the supplier and hence the exact chemical composition of the tested diesel. Thus to be able to use the EIS method in the practical research, it is necessary to gather the measuring results of reference samples to be able to compare current findings.
Źródło:
Pomiary Automatyka Kontrola; 2014, R. 60, nr 8, 8; 626-628
0032-4140
Pojawia się w:
Pomiary Automatyka Kontrola
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Electrochemical impedance characteristics of sintered 7075 aluminum alloy under SSRT condition
Charakterystyka spieku stopu aluminium 7075 metodą elektrochemicznej spektroskopii impedancyjnej (EIS) w warunkach próby rozciągania z małą prędkością odkształcenia (SSRT)
Autorzy:
Sunada, S.
Nunomura, N.
Powiązania:
https://bibliotekanauki.pl/articles/357000.pdf
Data publikacji:
2013
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
sintered material
pitting corrosion
electrochemical impedance spectroscopy
materiał spiekany
wżery korozji
elektrochemiczna spektroskopia impedancyjna
Opis:
Powder metallurgy (P/M) process has the advantage of better formability to fabricate complex shape products without machining and welding. And recently this P/M process has been applied to the production of aluminum alloys. The P/M aluminum alloys thus produced also have received considerable interest because of their fine and homogeneous structure. Many papers have been published on the mechanical properties of the aluminum alloys produced by P/M process while there have been few on their corrosion properties from the view point of electrochemistry. In this experiment, therefore, two kinds of 7075 aluminum alloys prepared by the conventional ingot metallurgy (I/M) process and P/M process were used, I/M material is commercially available. and their corrosion behavior were investigated through the electrochemical tests such as potentiodynamic polarization test, slow rate strain tensile (SSRT) test and electrochemical impedance spectroscopy (EIS) measurement under SSRT test in the corrosion solution and the deionized water.
Zaletą procesu metalurgii proszków (P/M) jest lepsza formowalność podczas wytwarzania produktów o złożonym kształcie nie wymagająca późniejszej obróbki mechanicznej i spawania. Ostatnio ten proces stosowano do wytwarzania stopów aluminium. Tak wytworzone stopy aluminium spotkały się z dużym zainteresowaniem ze względu na ich rozdrobnioną i jednorodną strukturę. Opublikowano wiele prac na temat właściwości mechanicznych stopów aluminium wytworzonych metodą metalurgii proszków, ale niewiele jest prac poświęconych ich korozji z punktu widzenia elektrochemii. W przedstawionej pracy badano korozje dwóch rodzajów stopu 7075, przygotowanych poprzez konwencjonalne odlewanie oraz metoda metalurgii proszków. Badania korozyjne wykonano z wykorzystaniem technik elektrochemicznych takich jak: metoda polaryzacji potencjodynamicznej, próby rozciagania z mała predkoscia odkształcenia (SSRT), pomiarów elektrochemicznej spektroskopii impedancyjnej (EIS) podczas próby rozciągania z małą prędkością odkształcenia w roztworze korozyjnym oraz w wodzie dejonizowanej.
Źródło:
Archives of Metallurgy and Materials; 2013, 58, 2; 505-508
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-15 z 26

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