This paper shows an influence of chemical composition of used electrolyte, such as amount of sulphuric acid in electrolyte, amount of aluminium cations in electrolyte and amount of oxalic acid in electrolyte, and operating parameters of process of anodic oxidation of aluminium such as the temperature of electrolyte, anodizing time, and voltage applied during anodizing process. The paper shows t...

This paper deeply analyzes the main factors of the dissolved problems arising in the process of aluminum alloy hard anodizing, combined with the specific problems occurring in production practice, introduces in detail the method and thought to analyze and investigate the causes of dissolving, and puts forward targeted improvement technology. This paper is practically instructive and significant...

The rapid inward migration of fluoride ions in growing anodic titanium oxide under a high electric field has been elucidated by anodizing a Ti-12 at% silicon alloy, where film growth proceeds at nearly 100% efficiency in selected electrolytes. Further, incorporated silicon species in the anodic film are immobile, acting as marker species. The migration rate of fluoride ions is determined precis...

Properties of the oxide layers on titanium and its implant alloys can be tailored to desired applications by anodizing parameters. Electrochemical oxidation in various electrolytes and different polarization regimes may shape the morphology, structure and chemical composition of oxide layers to enhance the use of titanium materials in electronics, photovoltaic and medicine. Phosphate electrolyt...

Hard anodizing of aluminum piston heads for internal combustion engines Is usually performed by immersion, with a time ranging from 40 to 50 minutes. This paper wii i present a new process, based on specially adapted hydrodynamics of the electrolyte, applying electrolysis parameter values outside the usual range and which greatly reduce the treatment time. In addition to applications to other c...

A series of laser joining experiments between polyethylene terephthalate (PET) and aluminium alloy (A5052) were conducted to investigate the effect of anodizing on A5052 surface on dissimilar materials used in joining. In this study, PET/A5052 joints with anodized A5052 surface exhibited greater shear strength compared to PET/A5052 joints without anodizing. The shear strength of the joints was ...

M. Gombar, J. Kmec, Institute of Technology and Businesses in České Budějovice, Czech Republic, M. Badida, L. Sobotova, A.Badidová, Faculty of Mechanical Engineering, Technical University of Kosice, Slovakia, A.Vagaská, Faculty of Manufacturing Technologies with a seat in Presov, Technical University of Kosice, Slovakia In the contribution is evaluated an impact of physical factors of anodizing...

Various techniques for forming TiO(2) coatings on Ti have been investigated for the improvement of the osteoconductivity of Ti implants. However, it is not clear how the oxidizing process affects this osteoconductivity. In this study, TiO(2) coatings were prepared using the following three processes: anodizing in 0.1 M H(3)PO(4) or 0.1 M NaOH aqueous solution; thermal oxidation at 673 K for 2 h...

We have investigated the dependence of reaction impedance in titanium anodizing on the frequency of a small sine wave voltage superimposed on a fixed D.C. voltage. The magnitude of the reaction impedance, |Z| is found to obey a power law of the angular frequency , | Z | . The exponent of 0.52 ± 0.05, which was determined by the measurement of the frequency-dependent |Z|, indicates that in the t...

Current titanium-based implants are often anodized in sulfuric acid (H(2)SO(4)) for color coding purposes. However, a crucial parameter in selecting the material for an orthopedic implant is the degree to which it will integrate into the surrounding bone. Loosening at the bone-implant interface can cause catastrophic failure when motion occurs between the implant and the surrounding bone. Recen...