The influence of aluminium anode composition of the hydronic current source on its operation effectiveness in the mode of a hydrogen generator

Аuthors

Okorokova N. S.^*, Pushkin K. V.^**, Sevruk S. D.^***, Farmakovskaya A. A.^****

Moscow Aviation Institute (National Research University), 4, Volokolamskoe shosse, Moscow, А-80, GSP-3, 125993, Russia

*e-mail: ok.nadezhda@mail.ru
**e-mail: konstantin-val@yandex.ru
***e-mail: sds46@yandex.ru
****e-mail: a.a.farmakovskaya@gmail.com

Abstract

The experimental volt-ampere and corrosion characteristics of A99 aluminium anodes, protector alloy АП4Н, and alloy of aluminium A995 and indium (0,6 mass. % In) have been obtained for the hydronic chemical current source (CCS) with smooth nickel cathode. The research has been carried out in alkaline electrolytes (4 М solution of NaOH, clear and with addition of 0,06 mol/l of Na2SnO3) and in salt electrolyte (4 М solution of NaCl). It was found out that hydrogen evolution speed in hydronic CCS with both alkaline-stannate and salt electrolytes is proportional to the current load that allows to regulate easily the capacity of hydronic CCS which operates as hydrogen generator for oxygen-hydrogen fuel cells of aviation, rocket and space equipment. Al-In alloy anodes are to be used in alkaline-stannate electrolyte, and the anodes of АП4Н protector alloy demonstrate better characteristics in neutral salt electrolyte. It was shown that short circuit current of the hydronic CCS is equal to 250300 А/m2 with salt electrolyte and increases up to 1500 А/ m2 with alkaline-stannate electrolyte.

Keywords:

aluminium, anode, water, hydrogen, generator, corrosion, fuel cell, chemical current source, electrolyte.