Dissolve silver using nitric acid

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SUMMARY

The discussion centers on the effective dissolution of silver coated on a titanium alloy (Ti-6Al-4V) using nitric acid. It is established that nitric acid will dissolve titanium, making it unsuitable for this application. The recommended approach is to anodize the titanium first, followed by silver deposition through autocatalytic reduction, allowing for silver dissolution without damaging the titanium. Alternatively, electrolytic dissolution of silver is suggested, though it may not completely remove the silver before affecting the substrate.

PREREQUISITES
  • Understanding of titanium alloys, specifically Ti-6Al-4V
  • Knowledge of anodization processes for titanium
  • Familiarity with autocatalytic reduction techniques for silver deposition
  • Basic principles of electrolytic dissolution methods
NEXT STEPS
  • Research anodization techniques for titanium alloys
  • Explore autocatalytic reduction methods for silver coating
  • Investigate electrolytic dissolution processes for precious metals
  • Study the effects of nitric acid concentration and temperature on metal dissolution
USEFUL FOR

This discussion is beneficial for materials scientists, electrochemists, and engineers involved in metal coating and dissolution processes, particularly those working with titanium alloys and silver applications.

rrg92
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I have a piece of equipment that was manufactured using direct metal laser sintering made of a titanium alloy (Ti-6Al-4V). It is a cylinder with thin helical channels that is located above a vapour source in vacuum. I plan to coat it with silver, and I am looking for an effective way to eventually dissolve the silver without etching the Ti alloy. I am considering using a nitric acid solution, and would appreciate any input on whether or not this is best suited for my requirements, and if so what concentration and temperature I should choose.
 
Nitric acid will dissolve the titanium. If you have the option to anodise the titanium followed by deposition of the silver by autocatalytic reduction and still retain the functionality of the part, that would be the route I would consider first. Then you could dissolve the silver in nitric acid

If not, an alternative to consider would be dissolving the silver electrolytically. The choice of electrolyte would need some thought and you would probably not get all the silver off before you start dissolving the substrate.
 

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