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2. Corrosion of synthetic intermetallic compounds and AA7075-T6 in dilute Harrison's solution and inhibition by cerium(III) saltsPeter Rodič, Ingrid Milošev, Gerald S. Frankel, 2023, izvirni znanstveni članek Povzetek: This study addresses the behavior of an aluminum alloy and its components in conditions simulating the presence of atmospheric salts. The corrosion of synthetic intermetallic compounds (IMCs) Al2Cu, Al2CuMg, Al7Cu2Fe, MgZn2, and bulk aluminum alloy 7075-T6 was studied in dilute Harrison’s solution (DHS, 0.35 wt% (NH4)2SO4 + 0.05 wt% NaCl). For IMCs, electrochemical measurements were performed using a microcell, and a standard electrochemical cell was used to study the bulk alloy. Separately measured cathodic and anodic potentiodynamic polarization curves were recorded, and prolonged immersion was characterized using electrochemical impedance spectroscopy. Samples were characterized using scanning electron microscopy, energy-dispersive X-ray spectroscopy and X-ray photoelectron spectroscopy. Bulk AA7075-T6 was less susceptible to corrosion in DHS than in chloride solution stemming from the beneficial presence of sulfate ions and lower chloride concentration. The susceptibility of IMCs to corrosion in DHS increased in the order Al2Cu < Al7Cu2Fe < Al2CuMg < MgZn2 due to the increased dissolution of Mg in the presence of ammonium ions. The relative nobility of IMCs was determined based on the galvanic current density. Further, the possibility of using cerium chloride, nitrate and acetate salts as corrosion inhibitors in DHS was evaluated. Ce salts acted as inhibitors for the alloy during 14 d testing, forming a Ce hydroxide layer. The degree of protection depended on the type of anion, with acetate Ce salt giving the most efficient protection. For the IMC, however, inhibition by Ce salts did not occur during short measurements in the microcell, indicating the importance of galvanic interaction with the alloy matrix in the inhibition mechanism, which was confirmed by long-term measurements of the alloy.
Ključne besede: aluminum alloy, atmospheric salts, corrosion, sample characterization
Objavljeno v DiRROS: 29.04.2025; Ogledov: 251; Prenosov: 104
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3. Effect of Sn on corrosion properties of homogenized Mg-6Zn-0.25Ca magnesium alloyYingtao Hu, Zheng Jia, Ronghui Kou, Zihui Zhai, Xiaowei Niu, 2025, izvirni znanstveni članek Ključne besede: Mg-Zn alloy, homogenization, CaMgSn phase, corrosion properties
Objavljeno v DiRROS: 24.04.2025; Ogledov: 352; Prenosov: 91
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4. Investigation of the wear-resistance characteristics of alumina-zirconia-titania-coated Al-6061 alloy for different processing parametersC. Suresh, Duraisamy Revathi Ponnusamy Rajarathnam, A. P. Sivasubramaniam, G. Saravanan, 2025, izvirni znanstveni članek Ključne besede: ceramic coating, wear resistance, aluminum alloy, wear rate, thermal coating
Objavljeno v DiRROS: 24.04.2025; Ogledov: 275; Prenosov: 90
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7. Functionalization of FeCoNiCu medium entropy alloy via nitridation and anodic oxidation for enhanced oxygen evolution and glycerol oxidationLuka Suhadolnik, Milutin Smiljanić, Marjan Bele, Mejrema Nuhanović, Matjaž Finšgar, Nik Maselj, Daniela Neumüller, Lidija D. Rafailović, Nejc Hodnik, 2025, izvirni znanstveni članek Povzetek: Medium entropy alloys (MEAs) have emerged as a promising class of materials for electro-catalysis due to their tunableproperties and exceptional catalytic performance. This study successfully functionalized a bulk FeCoNiCu alloy using a combined anodic oxidation (AO) and nitridation (NT) approach to produce a highly porous, thin-film catalyst. The hierarchical structure formed during the surface treatments enhances the material's specific surface area and alters the oxidation states of the constituent metals, creating abundant active sites. The electrocatalytic performance of themodified bulk FeCoNiCu electrode was evalu-ated for both the oxygen evolution reaction (OER) and glycerol oxidation reaction (GOR) in an alkaline electrolyte. Remarkably, the AO-NT-treated catalyst exhibited superior activity for OER, surpassing commercial IrOx benchmarks with lower overpotential requirements. For GOR, the FeCoNiCu electrode demonstrated excellent performance by significantly reducing energy input compared to OER, highlighting its potential as a dual-purpose catalyst for alkaline water splitting. Post-reaction product analysis via NMR confirmed the formation of value-added chemicals, with formic acid identified as the main product. These results underline the feasibility of surface-modified MEAs for sustainable energy and chemical production applications, offering a cost-effective alternative to noble metal-based catalysts.
Ključne besede: medium entropy alloy, surface modification, electrocatalysis, oxygen evolution reaction, glycerol oxidation
Objavljeno v DiRROS: 10.04.2025; Ogledov: 277; Prenosov: 143
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8. Simulation of high-temperature corrosion behavior of Ti6Al4V alloy in marine environmentsRongtao Zhu, Liang Zhang, Yuan Bo, Wei Chen, Shilu Chen, Shan Chi, Chunjiang Guo, Zhiwen Xie, 2025, izvirni znanstveni članek Ključne besede: Ti6Al4V alloy, high-temperature oxidation, hot-salt test, marine environment
Objavljeno v DiRROS: 21.02.2025; Ogledov: 393; Prenosov: 210
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9. Influence of symmetric and asymmetric rolling on texture evolution of work-hardened AA 5xxx aluminium alloyMatjaž Godec, Stefan Zaefferer, Jakob Kraner, Črtomir Donik, Irena Paulin, 2025, izvirni znanstveni članek Ključne besede: crystallographic texture, EBSD, aluminium alloy, symmetric/asymmetric rolling, anisotropy
Objavljeno v DiRROS: 29.01.2025; Ogledov: 278; Prenosov: 151
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10. Influence of surface preparation of aluminum alloy AW-5754 and stainless steel X5CRNI18-10 on the properties of bonded jointsNataša Zdravković, Damjan Klobčar, Dragan Milčić, Matevž Zupančič, Borut Žužek, Miodrag Milčić, Aleksija Ðurić, 2024, izvirni znanstveni članek Povzetek: Adhesive bonding has proven to be a reliable method of joining materials, and the development of new adhesives has made it possible to use bonding in a variety of applications. This article addresses the challenges of bonding metals such as the aluminum alloy EN AW-5754 and the stainless steel X5CrNi18-10. In this study, the effects of laser cleaning and texturing on the surface properties and strength of two bonded joints were investigated and compared with mechanical preparation (hand sanding with Scotch-Brite and P180 sandpaper). The bonded joints were tested with three different epoxy adhesives. During the tests, the adhesion properties of the bonded surface were determined by measuring the contact angle and assessing the wettability, the surface roughness parameters for the different surface preparations, and the mechanical properties (tensile lap-shear strength). Based on the strength test results, it was found that bonded joints made of stainless steel had 16% to 40% higher strength than aluminum alloys when using the same adhesive and surface preparation. Laser cleaning resulted in maximum shear strength of the aluminum alloy bond, while the most suitable surface preparation for both materials was preparation with P180 sandpaper for all adhesives.
Ključne besede: adhesive bonding, surface preparation, aluminum alloy AW-5754, stainless steel X5CrNi18-10, epoxy adhesives
Objavljeno v DiRROS: 20.12.2024; Ogledov: 354; Prenosov: 207
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