Maybe, as perhaps an electrochemical reaction is possible. For example, you apparently have many of the workings for a galvanic cell as:
1. You have two different metals, Zn and Al, or a metal and oxygen.
2. You have aqueous H2S which could undergo a oxidation-reduction reaction.
3. You have H2O and the only possible missing ingredient is a good electrolyte (normally, something like NaCl or ZnCl2, but you may have some
impurities that could contribute to a functioning poor electrolyte).
Note, low concentration levels are not a guarantee against an unwanted electrochemical reaction here.
[Edited on 15-8-2015 by AJKOER] |