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jeremy13
09-14-2014, 12:01 PM
Ok I have played with plating copper on stuff. I have a veritable power supply volts and amps. All the acids I can think of. I want to plate platinum on some 50 micron SS screen for a reaction process. So before I throw some platinum foil in acid. I want to make sure this is possible. Looking around on the net I see a lot about plating titanium and all the problems. I'm thinking a wash in brake cleaner then in HCL for an etch under power or not? Wash in distilled water then in to plating solution. For the platinum plating solutions I was going to dissolve the platinum foil in Aqua-regia and plate with that. Or add some water to the solution before plating. I'm looking for suggestions there's not a lot of info on the net.

Black_Moons
09-14-2014, 12:38 PM
Aqua-urea? Now you are taking the piss. Don't you mean Aqua regia?

jeremy13
09-14-2014, 02:17 PM
Yes aqua regia I had urea nitrate on my mind

RWO
09-14-2014, 02:45 PM
Platinum electroplating is common in industry. See http://www.youtube.com/watch?v=q9kfswSo9aY for a kitchen table procedure to plate a ring. You local library might have a copy of " Modern Electroplating" or similar which probably contains some info.


RWO

Mark Rand
09-14-2014, 03:16 PM
Is it worth looking at the chemical deposition of platinum black? That will give a large surface area, albeit not very robust, film

Black_Moons
09-14-2014, 07:10 PM
Is it worth looking at the chemical deposition of platinum black? That will give a large surface area, albeit not very robust, film

AFAIK that is for when you want a platnium catalyst. If you are decoratively plating, or for corrosion resistance you want just standard electroplating.

jeremy13
09-14-2014, 10:40 PM
This will be for the oxidation of Ammonia with the Ostwald process. I did try what I believe was the platinum black catalyst. I had better results with automobile catalytic converters. I may have lost a lot of the platinum black when I re-formed the catalyst I picked up on eBay. http://http://www.ebay.com/itm/261581213292.
All of the reactions I can find use platinum screen or gauze with up to 10% rhodium. One guy promotes replacement with his cobalt 2 or 3 ceramic matrices similar to automobile cats.

Mark Rand
09-15-2014, 05:50 AM
Isn't it simpler to just buy nitric acid???

jeremy13
09-15-2014, 01:24 PM
Have you priced 2.5L of nitric acid not to mention the $30-$50 hazmat charge for shipping? If I can take a $.99 Gal of distilled water and turn it in to acid for $10 why not. And it’s fun to learn new stuff to.