moonlight machine
Diamond
- Joined
- Nov 19, 2007
- Location
- marysville ohio
A while back it seems like I remember a post about a way to remove the blue and gold colors around the weld. does anyone else remember this? what was it?
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two ways work- mechanically, I use scotchbrite pads or belts on various sanders. A variable speed 4 1/2" grinder with a scotchbrite pad is nice, as you can slow it down enough that you dont get it hot and discolored again.
or- chemically.
I use a small dc power supply, mine is made for this and its 30volts, along with wand that is wrapped in fiberglas cloth, then dipped in citric acid.
There are also small bottles of acid cleaner you can buy - I sometimes use a nitric or phosphoric acid based spray on stainless cleaner you buy at the auto parts store.
Who sells the power supply? How fast does it work? We have 100s of parts to do.
My memory may be faulty but years ago I seem to remember using Tidy Bowl to remove the discoloration?
Yeah, its pretty quick- You hit each weld, all the way around, and its a minute or so, then you rinse. Finished. If you have hundreds, portable electropolishing is totally the way to go. We do it on job sites after site welds, and have things that have been out there for 20 years in the elements, and are still fine.
Please tell me all about electro polishing, I've heard of it but know nothing about it.
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