Stripping gold plate from AL/TI

[Higashi]

I tried to use stainless tanks (vessels) a couple of times and ended up with holes in the tanks. The sulfuric seems to get after the nickel and/or chromium. I always used mild steel tanks as the cathode with little or no attack after a couple of years. Just make sure the welding rod used to weld up the tank doesn't have Ni or Cr in it.

Eww.. that's bad.

What's the chemistry behind this... why does it not attack copper, but it does on Ni and Cr, yet in the same time dissolves Au.
forgive me for being blunt, last i ever try to understand anything chemistry was for CHEM101 in college, which was like over 10 years ago.

 

[Barren Realms 007]

I tried to use stainless tanks (vessels) a couple of times and ended up with holes in the tanks. The sulfuric seems to get after the nickel and/or chromium. I always used mild steel tanks as the cathode with little or no attack after a couple of years. Just make sure the welding rod used to weld up the tank doesn't have Ni or Cr in it.

Eww.. that's bad.

What's the chemistry behind this... why does it not attack copper, but it does on Ni and Cr, yet in the same time dissolves Au.
forgive me for being blunt, last i ever try to understand anything chemistry was for CHEM101 in college, which was like over 10 years ago.

It will attack copper.

 

[goldsilverpro]

I tried to use stainless tanks (vessels) a couple of times and ended up with holes in the tanks. The sulfuric seems to get after the nickel and/or chromium. I always used mild steel tanks as the cathode with little or no attack after a couple of years. Just make sure the welding rod used to weld up the tank doesn't have Ni or Cr in it.

Eww.. that's bad.

What's the chemistry behind this... why does it not attack copper, but it does on Ni and Cr, yet in the same time dissolves Au.
forgive me for being blunt, last i ever try to understand anything chemistry was for CHEM101 in college, which was like over 10 years ago.

It will attack copper.

(1) If the sulfuric is strong enough and (2) if you don't run the current too high and (3) if you don't let the solution get hotter than about 110-120F and (4) if you harvest the gold when you should, it won't attack copper.

 

[Oz]

The #1 mistake that most make with sulfuric cells is that even if they start with properly concentrated sulfuric acid they end up with it being too dilute without knowing it. Concentrated sulfuric will draw visible water vapor off of your damp gloved hand at 6 inches. In other words it dilutes itself by taking on water from the air.

 

[Barren Realms 007]

I tried to use stainless tanks (vessels) a couple of times and ended up with holes in the tanks. The sulfuric seems to get after the nickel and/or chromium. I always used mild steel tanks as the cathode with little or no attack after a couple of years. Just make sure the welding rod used to weld up the tank doesn't have Ni or Cr in it.

Eww.. that's bad.

What's the chemistry behind this... why does it not attack copper, but it does on Ni and Cr, yet in the same time dissolves Au.
forgive me for being blunt, last i ever try to understand anything chemistry was for CHEM101 in college, which was like over 10 years ago.

It will attack copper.

(1) If the sulfuric is strong enough and (2) if you don't run the current too high and (3) if you don't let the solution get hotter than about 110-120F and (4) if you harvest the gold when you should, it won't attack copper.

Thats a lot of if's for new people to keep under control.
Mine does a good job with little to no problem's.

 

[Higashi]

I tried to use stainless tanks (vessels) a couple of times and ended up with holes in the tanks. The sulfuric seems to get after the nickel and/or chromium. I always used mild steel tanks as the cathode with little or no attack after a couple of years. Just make sure the welding rod used to weld up the tank doesn't have Ni or Cr in it.

Eww.. that's bad.

What's the chemistry behind this... why does it not attack copper, but it does on Ni and Cr, yet in the same time dissolves Au.
forgive me for being blunt, last i ever try to understand anything chemistry was for CHEM101 in college, which was like over 10 years ago.

It will attack copper.

(1) If the sulfuric is strong enough and (2) if you don't run the current too high and (3) if you don't let the solution get hotter than about 110-120F and (4) if you harvest the gold when you should, it won't attack copper.

Thats a lot of if's for new people to keep under control.
Mine does a good job with little to no problem's.

you use stainless steel parts?

 

[Barren Realms 007]

Mostly plastic.