IONIC LIQUIDS AS DIATHERMIC FLUIDS FOR SOLAR TROUGH COLLECTORS’ TECHNOLOGY: A CORROSION STUDY
The AISI 304 and the AISI 1018 steels, frequently used in solar collectors plants, were studied in contact with some Ionic Liquids suitable as diathermic fluids. Room temperature steelscorrosion behaviours were investigated by electrochemical measurements: Open Circuit Potential curves were recorded to establish the free corrosion potential and potentiodynamic curves were acquired to compare the active/passive tendency of the materials. The corrosion rates, extrapolated from Tafel Plots and by Polarization Resistance measurements, are characterized by low values (<2 μA cm-2) for both the alloys. Immersion tests were performed at 220℃ (common working temperature in parabolic trough collectors) starting from 48 h and no appreciable weight-losses for the alloys were observed even after 10 days of immersion. The quantity of the metals dissolved in the ILs was detected via Inductive Coupled Plasma Optical Emission Spectrometry. Finally, the morphology of the corrosion phenomena were investigated by Scanning Electron Microscopy coupled with EDAX analysis.
Ilaria Perissi Stefano Caporali Alessandro Lavacchi Ugo Bardi Alessio Fossati
Chemistry Department, Università di Firenze Via della Latruccia 3 50019 Sesto Fiorentino, Italy
国际会议
2007世界太阳能大会(Proceedings of ISES Solar World Congress 2007)
北京
英文
2007-09-18（万方平台首次上网日期，不代表论文的发表时间）