Hi all,
Could someone explain if constantan alloy has a crystal structure and how it oxidizes when etched with cupric chloride. How would the ORP calculation be affected as opposed to the oxidation of pure Cu with cupric chloride, Thanks
Dear Alwis,
This is a very good question, i think in acidic solution when you add CuCl2, both Cu+ and Cu2+ species are formed and CuCl is possibly the dominant species in the solution, i am not sure but definitely it is simple to do thermodynamic calculations to evaluate the dominance of any species in the solution. Also, If you see the redox potential of Cu/Cu+ (approx. 0.5 V vs. SHE) and Cu+/Cu2+ (approx 0.15 V vs. SHE), these are sufficiently higher (more positive) than Cu/Cu2+ (+0.33 V vs SHE) and Ni/Ni2+ (-0.25 V vs. SHE), respectively. Possibly, the combined effect of existing species in the solution (i.e. Cu+, Cu2+ etc.) may affect the dissolution characteristics of constantan alloy.
- Badges
- Science topic
- Similar topics
- Physical Sciences
- Materials Science
- Materials
- Inorganic Materials
- Metals
- Alloys