Plant extracts are intensively studied as green corrosion inhibitors of aluminum. Because these complex systems, the influence their individual constituents on aluminum should be determined. In this work, gallic acid was tested for first time a inhibitor in orthophosphoric aqueous solution. So far, its potential inhibiting properties acidic solutions were only suggested based promising results obtained various plant extracts. Evaluation performed using electrochemical methods. The potential,...

Abstract New materials and new phenomena which can be used for information processing always inspire great enthusiasm. On the other hand, silicon is still main workhorse of modern electronics. Production bulk quantities ultrapure relatively cheap technologies are extremely sophisticated. Introduction phenomena, on requires an enormous amount hard experimental theoretical work. The photoelectrochemical photocurrent switching effect (PEPS) one processes that, in principle, evolve into...

The aim of this work was to establish the influence thickness anodic coatings on their mechanical properties and understand relation between hardness abrasion resistance. were produced in hard anodizing process onto 6061-T6 aluminum alloy. Their range 19 43 µm. resistance determined by using Taber test. weight losses obtained 15 11 mg decreased with increasing thickness. It has been shown that measured cross sections did not correspond Thus, new approach proposed. estimated basis results...

In the presented work photoelectrochemical properties of SbSI along with electronic structure (i.e. conduction and valence band edge potentials as well conductivity type) sonochemically obtained nanowires are discussed for first time. The spectroscopic investigations indicate interesting optical properties, including surface isotope effect excitonic emission. investigation revealed occurrence photocurrent switching effect. It may be defined a change in direction (generated at illuminated...

The objective of this work was to establish the influence sodium molybdate on corrosion kinetics 7075 aluminium alloy in orthophosphoric acid aqueous solution. Corrosion rate decreased from 75.98 3.24 g per m2 day. mechanism inhibition studied using scanning electron microscopy, X-ray photoelectron spectroscopy, UV-Vis spectrophotometry and electrochemical impedance spectroscopy. It revealed that heteropolyoxomolybdate species act as inhibitor. They adsorb onto surface inhibit an anodic...

Abstract The role of the oxide layer in corrosion aluminium hydrochloric, sulphuric(VI) and orthophosphoric acid is studied at pH 1. stable hydrochloric sulphuric acids. rate these solutions 0.2 0.3 mm/year, respectively. unstable higher, 1.75 mm/year. process using scanning electron microscopy, immersion electrochemical techniques. mechanism solution proposed. It includes adsorption a reaction intermediate on surface corroding metal formation anodic potentials with respect to open‐circuit...

The well-known PbMoO₄ material exhibits novel properties.

BixLa1-xVO4 solid solutions were obtained in the form of fine powder via a microwave-assisted hydrothermal route. The presence solution studied system was confirmed using X-ray diffraction (XRD) and optical spectroscopy techniques. Pure BiVO4 LaVO4 monoclinic form, whereas tetragonal, zircon-type structure. band gap dependence on composition is parabolic, thus there possibility to tune this parameter wide concentration range, from 2.4 4.0 eV. An absorption coefficient maximum also...

1. Project no. UOD-DEM-1-557/001, co-financed by the European Union under Regional Development Fund within Innovative Economy Operational Program and Foundation for Polish Science (FNP) are gratefully acknowledged.

An aluminium alloy (5005) was hard anodised using pulsed current. The influence of current density and bath temperature on the electrical parameters anodising process studied. It found that elevated does not deteriorate mechanical properties coatings, such as wear scratch resistance. following parameters: equal to 4 A·dm−2 °C gives lowest value electric energy necessary produce coating. Thus, they are beneficial for maintaining cost effectiveness plant.

Photoelectrodes containing cadmium sulfide deposited as powders and crystalline thin layers combined with semi-solid ionic liquid electrolyte behave like Schottky photodiodes. Appropriate connection of these devices results in simple optoelectronic logic gates (AND, XOR) enables construction an binary half-adder.

Highly crystalline powders of lead molybdate and tungstate were synthesized by a microwave assisted hydrothermal process in heated high pressure autoclave. Application this novel environmentally friendly technique the synthesis these compounds has never been reported before. The influence time on crystal structure, morphology value band gap for both PbMoO 4 PbWO was examined. determined using diffuse reflectance spectroscopy. For medium equals to ca. 3.2 eV whereas it oscillates around does...

Corrosion inhibition of aluminium alloys in the acidic solutions is important finishing industry (stripping for anodic films). Sodium molybdate a potential replacement chromate-containing species used stripping solutions. It was tested as corrosion inhibitor 2024 alloy orthophosphoric acid A rate function an initial concentration sodium and temperature determined by using gravimetric gasometric methods. The significantly lower containing over 5 mM when compared to uninhibited solution....

Abstract In this paper, a novel method for the synthesis of Pt nanoparticles (PtNPs) using microwave autoclave reactor is proposed. For benchmarking, obtained results are compared with traditional, batch method. A process window proposed, which application high-temperature and high-pressure. The main finding that only brings advantage, when ionic strength system enough low. It explained, at high pressure temperature, water behaves like slightly polar solvent, approaching subcritical state....

The kinetics of the corrosion aluminium in orthophosphoric acid aqueous solution was investigated spectrophotometrically and gravimetrically. Sodium molybdate applied as inhibitor process. analysis results obtained indicated that there are at least two species might be useful for inhibition corrosion. These products from reduction molybdophosphoric with aluminium. mechanism depends on initial concentration sodium molybdate.

Abstract Orthophosphoric acid solutions of sodium orthovanadate, tungstate, and molybdate are tested as potential corrosion inhibitors the Al 2 Cu intermetallic phase. Corrosion inhibition is observed for 0.2 M Na 3 VO 4 WO by increasing pH to > 2. When < 2, aforementioned salts increase rate A solution causes precipitation vanadium phosphate on surface phase at = 1.