Preventing Oxidation of Gallium in Metal Alloy

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SUMMARY

The discussion focuses on preventing the oxidation of gallium in a liquid metal alloy, specifically for creating a fusible, eutectic alloy. The primary challenge is that gallium oxidizes easily, forming gallium oxide, which interferes with its properties. Participants suggest exploring the addition of another metal to the alloy to inhibit oxidation, similar to how zinc galvanizing protects iron. The user seeks a non-toxic alternative that mimics the behavior of mercury without the associated hazards.

PREREQUISITES
  • Understanding of eutectic alloys and their properties
  • Knowledge of gallium and its chemical behavior
  • Familiarity with metalworking techniques
  • Basic concepts of oxidation and corrosion prevention methods
NEXT STEPS
  • Research methods for creating non-toxic fusible alloys
  • Investigate metals that can inhibit oxidation in gallium-based alloys
  • Explore the properties and applications of paraffinic oils in metalworking
  • Learn about the chemical interactions between gallium and other metals
USEFUL FOR

Metalworkers, materials scientists, and hobbyists interested in developing non-toxic liquid metal alloys and preventing oxidation in gallium-based materials.

danman5000
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Hello!

I just registered on these forums and this is my first post here, so hopefully I did everything right.

I recently got into metalworking in my spare time, and I am trying to create a metal alloy that will remain liquid at room temperature (a fusible, eutectic alloy). From what I've read, gallium is a required component, unless I get into more dangerous materials like NaK. The problem with gallium is that it wets most materials, and I found through research that it is actually gallium oxide that causes the problem. So, I need to find a way to stop the gallium from oxidizing. I obviously can't "galvanize" the alloy since it is a liquid, and I also don't want to coat surfaces with anti-wetting materials like they do in mercury-free thermometers (since the whole point is that I can hold it in my hands and play with it). Thus, my question is this: Is there something that I can add into the alloy itself to prevent gallium from oxidizing? I.e. another metal, etc. that would sort of "lock" the gallium into the alloy and stop oxygen molecules from attacking it. Ideally, I want something that looks and behaves exactly like mercury, but is non-toxic. If anyone has any ideas about this, post away. Thanks in advance!
 
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You might try a paraffinic oil. Might be a bit messy 'tho.
 
chemisttree said:
You might try a paraffinic oil. Might be a bit messy 'tho.

Yeah that's what I'm trying to avoid, unfortunately. I'd like to find another metal that I could add as a component in the alloy itself that would stop any oxidation from occurring, sort of like how zinc galvanizing stops iron from rusting.
 

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