Grishina Ekaterina, Gelman Danny, Belopukhov Sergey, Starosvetsky David, Groysman Alec, Ein-Eli Yair
Department of Physical and Organic Chemistry, Russian State Agrarian University, Moscow, Russia.
Department of Materials Science and Engineering, Technion-Israel Institute of Technology, Haifa, 3200003, Israel.
ChemSusChem. 2016 Aug 23;9(16):2103-11. doi: 10.1002/cssc.201600298. Epub 2016 Jul 28.
The effect of a flax straw extract on Al corrosion inhibition in a strong alkaline solution was studied by using electrochemical measurements, weight-loss analysis, SEM, and FTIR spectroscopy. Flax straw extract added (3 vol %) to the 5 m KOH solution to act as a mixed-type Al corrosion inhibitor. The electrochemistry of Al in the presence of a flax straw extract in the alkaline solution, the effect of the extract on the Al morphology and surface films formed, and the corrosion inhibition mechanism are discussed. Finally, the Al-air battery discharge capacity recorded from a cell that used the flax straw extract in the alkaline electrolyte is substantially higher than that with only a pure alkaline electrolyte. This improved sustainability of the Al anode is attributed to Al corrosion inhibition and, consequently, to hydrogen evolution suppression.
