Wyniki wyszukiwania - BazTech

Ograniczanie wyników

2 Advances in Materials Science

2 2007

Znaleziono wyników: 2

Liczba wyników na stronie

Wyniki wyszukiwania

Sortuj według:

Ogranicz wyniki do:

Synthesis and characterisation of thin cerium-based oxide films by celd on zinc metal

Poupard S., Pedraza F., Creus J.

Advances in Materials Science

2007

Vol. 7, nr 2(12)

300-307

The restriction ban of Cr(VI) based treatment to enhance corrosion resistance of Zn and Zn-alloy coatings requires the development of an environmental friendly alternative process. This study is therefore focused into the synthesis of new treatments based on thin cerium oxide (ceria) films through a cathodic electrodeposition (CELD) process. The surface finishing of the Zn substrates, the electrolyte composition and the deposition parameters are systematically studied to obtain uniform thin ceria layers of diverse microstructures and compositions. Among them, the most homogeneous deposits will be immersed in a stirred and aerated 0.5 mol.L-1 NaCl solution in order to examine the protective ability of these thin cerium-based layers through electrochemical measurements.

Influence of microstructural heterogeneities on hydrogen evolution at different scales

Alami H.El, Creus J., Sabot R., Feaugas X.

Advances in Materials Science

2007

Vol. 7, nr 1(11)

140-146

The present work focuses on the influence of different levels of microstructural heterogeneities, observed on polycrystalline f.c.c. metal on Hydrogen Evolution Reaction efficiency. The effect of grain size and plastic strain on polycrystalline nickel is analysed, as well as the influence of crystallographic orientation and plastic strain of law index single crystals. A particular attention bas been devoted to kinetic and thermodynamic parameters which characterise hydrogen adsorption and desorption.