I am currently messing around with gallium compromising aluminum. I am using a titalium lock which is just a brand of aluminum padlock and I put a gallium-indium euctic alloy on the surface of it. It’s been around 10 minutes and on the surface of the liquid is a gold colored substance. What is this? Any idea why it’s happening??enter image description here

  • $\begingroup$ By the way this happens every time i expose aluminum to the gallium-indium alloy but doesn’t happen when it’s just gallium $\endgroup$ – killakrab Jul 1 '18 at 17:08
  • $\begingroup$ It also does not react with water when I put it in water. $\endgroup$ – killakrab Jul 3 '18 at 20:00
  • $\begingroup$ If anyone else has done experiments with gallium and aluminum please leave feedback on what you think this is $\endgroup$ – killakrab Jul 6 '18 at 17:57
  • $\begingroup$ Do you see an attack of the aluminium surface? Could it be something similar to the aluminium mercury amalgam reaction, where the passivation of the aluminium surface is broken, and the oxide is forming at the surface of the liquid metal? The color then just being the result of impurities or small size of the aluminium oxide particles. $\endgroup$ – Fabian Sep 2 '19 at 19:46

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