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I tried this this past weekend with some info from a fellow enthusiast who had been sucessful at it. The subjects are pot metal car parts (small) that are triple chrome plated. I want to strip the exisiting plate, fill, prime and copy chrome.
I mixed a solution of battery acid and tried a coupel \"junk\"handles. I got good results at first, then tried an earlier better handle and it didn\'t work well at all. one area \"over stripped\", ate well into the pot metal, while the other end didn\'t de-plate at all.
I sense that this might be a delicate procedure, especially on acid sensative pot metal, but wondered if anyone else had been successful at it. In particual:
What kind of acid solution did you use? I bought sufuric acid from an auto parts store in a white, rectangular plastic container. I mixed it with tap water about 25/75% acid/water. Dont know what the \"out of the bottle\" concentration of the acid was, couldn\'t interpret the numbering on the label (anyone know?).
What kind of cathode (or would it be anode) do you use? I used a high carbon M10 bolt. The deposits that formed on it were red-copper color and wiped right off.
What kind of current did you use? I have a very large volt and amperage controlled DC supply and had to crank 8-12 amps through to get the stuff to deplate, and it still took 20-40 mins. Is this normal? Solution got pretty warm.
I have sand a bead blasting capability, is that generally considered a better solution for de-plating small, intricate parts?
Thanks for any insight.
John H.
I mixed a solution of battery acid and tried a coupel \"junk\"handles. I got good results at first, then tried an earlier better handle and it didn\'t work well at all. one area \"over stripped\", ate well into the pot metal, while the other end didn\'t de-plate at all.
I sense that this might be a delicate procedure, especially on acid sensative pot metal, but wondered if anyone else had been successful at it. In particual:
What kind of acid solution did you use? I bought sufuric acid from an auto parts store in a white, rectangular plastic container. I mixed it with tap water about 25/75% acid/water. Dont know what the \"out of the bottle\" concentration of the acid was, couldn\'t interpret the numbering on the label (anyone know?).
What kind of cathode (or would it be anode) do you use? I used a high carbon M10 bolt. The deposits that formed on it were red-copper color and wiped right off.
What kind of current did you use? I have a very large volt and amperage controlled DC supply and had to crank 8-12 amps through to get the stuff to deplate, and it still took 20-40 mins. Is this normal? Solution got pretty warm.
I have sand a bead blasting capability, is that generally considered a better solution for de-plating small, intricate parts?
Thanks for any insight.
John H.
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