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Ardigo M.R.,Laboratory Interdisciplinaire Carnot de Bourgogne | Popa I.,Laboratory Interdisciplinaire Carnot de Bourgogne | Chevalier S.,Laboratory Interdisciplinaire Carnot de Bourgogne | Parry V.,Joseph Fourier University | And 5 more authors.
ECS Transactions | Year: 2013

The high temperature steam electrolysis (HTE) represents one of the most promising technologies for mass hydrogen production. A commercial K41X steel (AISI441) containing 18 wt. % of chromium was tested as interconnect for solid oxide electrolyser cells (SOEC). In a previous paper, it was shown that the uncoated alloy is not suitable for SOEC interconnect application at 800°C in O2′H2O atmosphere. It was also proved that the application of a LaNi0.6Fe0.4O3-δ coating on the surface by physical vapour deposition process improves the alloy electrical behaviour and reduces chromium species evaporation. For this study, the same coating was deposited on the alloy surface by screen-printing process. Moreover, two spinel-type oxides, Co2MnO4 and Co 3O4, deposited by physical vapour deposition process, were also tested in O2′H2O atmosphere at 800°C. The electrical conductivity did not present any improvement, but the Cr species volatility was reduced, especially with the LaNi0.6Fe 0.4O3-δ coating. © The Electrochemical Society.


Ardigo M.R.,Laboratory Interdisciplinaire Carnot de Bourgogne | Popa I.,Laboratory Interdisciplinaire Carnot de Bourgogne | Chevalier S.,Laboratory Interdisciplinaire Carnot de Bourgogne | Parry V.,Joseph Fourier University | And 6 more authors.
International Journal of Hydrogen Energy | Year: 2013

High temperature water vapour electrolysis (HTE) is an efficient technology for hydrogen production. In this context, a commercial stainless steel, K41X (AISI 441), was chosen as interconnect. In a previous paper, the high temperature corrosion and the electrical conductivity were evaluated in both anode (O2-H2O) and cathode (H2-H2O) atmosphere at 800 C. In O2-H2O atmosphere, the formation of a thin chromia protective layer was observed. Nevertheless, the ASR parameter measured was higher than the maximum accepted value. These results, in addition with chromium evaporation measurements, proved that the K41X alloy is not suitable for HTE interconnect application. In this study, two perovskite-type oxides La0.8Sr0.2MnO3-δ and LaNi 0.6Fe0.4O3-δ were tested as coatings in O2-H2O atmosphere at 800 C. Screen-printing and physical vapour deposition were used as coating processes. The high temperature corrosion resistance and the electrical conductivity were improved, especially with the LaNi0.6Fe0.4O3-δ coating. Cr specie volatility was also reduced. © 2013, Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights.


Ardigo M.R.,Laboratory Interdisciplinaire Carnot de Bourgogne | Popa I.,Laboratory Interdisciplinaire Carnot de Bourgogne | Chevalier S.,Laboratory Interdisciplinaire Carnot de Bourgogne | Girardon P.,Aperam S.A | And 4 more authors.
International Journal of Hydrogen Energy | Year: 2014

K41X (AISI 441) stainless steel evidenced a high electrical conductivity after 3000 h ageing in H2/H2O side when used as interconnect for solid oxide electrolyser cells (SOEC) working at 800 °C. Perovskite (La1 - xSrxMnO3 - δ) and spinel (Co3O4) oxides coatings were applied on the surface of the ferritic steel for ageing at 800 °C for 3000 h. Both coatings improved the behaviour of the steel and give interesting opportunities to use the K41X steel as interconnect for hydrogen production via high temperature steam electrolysis. Co3O4 reduced into Co leading to a very good Area Specific Resistance (ASR) parameter, 0.038 Ω cm2. Despite a good ASR (0.06 Ω cm2), La1 - xSrxMnO3 - δ was less promising because it partially decomposed into MnO and La2O3 during ageing in H2/H2O atmosphere. © 2014, Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights reserved.


Ardigo M.R.,Laboratory Interdisciplinaire Carnot de Bourgogne | Popa I.,Laboratory Interdisciplinaire Carnot de Bourgogne | Chevalier S.,Laboratory Interdisciplinaire Carnot de Bourgogne | Girardon P.,Aperam S.A | And 4 more authors.
EFC 2013 - Proceedings of the 5th European Fuel Cell Piero Lunghi Conference | Year: 2013

Perovskites and spinel oxides coatings were applied on the surface of a ferritic steel used as interconnects for solid oxide electrolyser cell (SOEC) working at 800°C. This work presents new results obtained in the H2/H2O side. The experiments were performed for 3000h on uncoated K41X (AISI 441) steels. The application of perovskite (La1-xSrxMnO3-δ) or spinel oxide (Co3O4) coatings improved the behavior of the steels and consists in interesting opportunities to use the K41X steel as interconnect for hydrogen production via high temperature steam electrolysis. Copyright © 2013 Delta Energy and Environment.


Grant
Agency: European Commission | Branch: FP7 | Program: BSG-SME | Phase: SME-2012-1 | Award Amount: 1.37M | Year: 2013

We all like aesthetical pleasant colors in our every day products: kitchen and bath accessories; domestic appliances; architectural, nautical or automotive fittings; electronics components; jewelry; medical devices. In fact color coatings are present in most everyday products. PVD is one of the most promising coating processes offering brilliant and decorative finishes, superior hardness and wear resistance and lack of environmental concerns. Unfortunately PVD processes lack of reliability and high costs limit the use of PVD technologies to uncolored coatings, expensive components or large series. In Nano4Color we will develop a new strategy for the production of PVD hard decorative coatings based on nanocomposite coatings consisting of a dielectric matrix with imbibed metallic nanoclusters. Nano4color will work with two hybrid technologies; RMS/Cluster Gun and RMS/HIPISM to produce nanocomposite coatings that yield tailored optical properties with a single metal/metal oxide system. Our approach will allow overcoming the last barrier associated to the use of PVD coatings with a single composition color tailored solution resulting in greater freedom for color generation; including green and red tones. In addition we intend to design new industrial coating process, which are more reliable and cost effective. Nano4Color aims at making affordable PVD coatings for the production of everyday appliances while providing an extended color palette, increased wear resistance and lower toxic emissions. Nano4Color is expected to have a big impact on the 18,000 European SMEs working on decorative coatings with an estimated value of 11,350 M. These innovations will benefit the overall surface treatment sector by reducing production costs, increasing commercial margins and addressing industrial legislations. Furthermore these advantages will also benefit the industrial manufacturers who will be able to offer more pleasant products with lower costs and environmental emissions.

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