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By using sodium hydroxide as a catalyst, aluminum and its alloys can react with water to generate hydrogen gas.
That is way I found myself asking subject matter experts like you.  
How is Hydrogen release from Aluminium. [?] [?]Is it just temperature affecting its composition?
Do you pronounce Aluminium: A-lum-in-num or Alu-min-i-um?
It's an Electrolysis Cell, and it's probably there just because it's pretty.For the purposes of completeness,Al2O3 with Acid:Al2O3 + 6 HCl → 2 Al3+ + 6 Cl- + 3 H2O
Al2O3 with Base:Al2O3 + 2 NaOH → 2 Na2Al(OH)4
Okay ...lets split up... you said it! Now prepared to be ripped apart!!!!!!! 
Hot dilute HCl should be enough to react with aluminium oxide.