Manganese pigmented anodized copper as solar selective absorber

The study concerns the optical and structural properties of layers obtained by a new efficient surface treatment totally free of chromium species. The process is made up of an anodic oxidation of copper in an alkaline solution followed by an alkaline potassium permanganate dipping post-treatment. Coatings, obtained at the lab and pilot scales, are stable up to 220 °C in air and vacuum, present low emissivity (0.14 at 70 °C) and high solar absorptivity (0.96), i.e. a suitable thermal efficiency (0.84 at 70 °C)

FT-IR Microscopic Base Imaging System: Applications for Chemical Analysis of Zn and Ni Atmospheric Corrosion

International audienc

FT-IR Microscopic Base Imaging System: Applications for Chemical Analysis of Zn and Ni Atmospheric Corrosion

International audienc

Hyperfine interactions and lattice dynamics of Sn21O6Cl16(OH)14

International audienc

Oxidation behaviour of the 47Nb 16Si 25Ti 8Hf 2Al 2Cr alloy sheet and vibrational spectroscopy

International audienc

Oxidation behaviour of the 47Nb 16Si 25Ti 8Hf 2Al 2Cr alloy sheet and vibrational spectroscopy

International audienc

Oxidation behaviour of the 47Nb 16Si 25Ti 8Hf 2Al 2Cr alloy sheet and vibrational spectroscopy

International audienc

Hyperfine interactions and lattice dynamics of Sn21O6Cl16(OH)(14)

In this study, the tin(II) oxy-hydroxychloride Sn21O6Cl16(OH)(14) has been synthesised and investigated, This compound is the synthetic equivalent of mineral abhurite, which was discovered in 1985 as a tin corrosion product formed on the surface of tin ingots after long immersion in seawater. The Mossbauer parameters of Sn(21)O6Cl(16)(OH)(14) determined at various temperatures are reported and discussed for the first time. At room temperature, the isomer shift and the quadrupole splitting are, respectively, delta = 3.22 mm s(-1) and Delta = 1.71 mm s(-1) relative to the centroid of the spectrum of BaSnO3. ne Mossbauer recoil-free fraction has been also evaluated over a wide range of temperature. At 300 K, the recoil-free fraction of Sn21O6Cl16(OH)(14) is f(300) = 0.09 +/- 0.02. (C) 2008 Elsevier Inc. All rights reserved