Electropolishing Stainless steel, Aluminium, Titanium, and copper alloys - Page 4 - International Association of Penturners
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Old 03-17-2013, 04:58 PM   #31 (permalink)
 
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JUST my rubber floral apron, sweetlips!!! :)
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Old 03-17-2013, 05:22 PM   #32 (permalink)
 
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pmsl, just be sure you watch where those stainless red hot chips end up

Check this out" apologies for quality of blurriness.. biggest image on the net i could find of this advert from 1953
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Old 03-17-2013, 05:25 PM   #33 (permalink)
 
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Hey Honeybunch, no need for proof, I believe you. I just like giving you a hard time. :)
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Old 03-17-2013, 05:35 PM   #34 (permalink)
 
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proofs in the practicle

just makes me smile that parker have been up to it for the past 60 years
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Old 03-17-2013, 05:37 PM   #35 (permalink)
 
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Quote:
Originally Posted by BradG View Post
and there was me thinking you were just really into your stainless

so what do you wear when you kinky work in stainless?? haaaaaaa

I thought I was keeping up on my British colloquialisms, but this one threw me. My phone does the same kind of weird word substitution to me.
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Old 03-17-2013, 05:38 PM   #36 (permalink)
 
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Maybe this is a bit beyond me right now... How do you tell what stainless series you have? This may end up as a loooooong summer project, most of it being a lot of reading!
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Old 03-17-2013, 05:53 PM   #37 (permalink)
 
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Maybe this is a bit beyond me right now... How do you tell what stainless series you have? This may end up as a loooooong summer project, most of it being a lot of reading!
well the simplest approach is buy it from a metal dealer and they will generally have it labelled. if you are not sure ask them before buying as to what type it is.. like with aluminium... i like to work with 6061 T6 aluminium, which is a general engineering alloy, which has a hardness of T6 look into the different codes and series.. you can learn alot from them. things such as if they will smut alot when exposed to caustic substances can be determined
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Old 03-17-2013, 08:15 PM   #38 (permalink)
 
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So with this rod from the hardware, I can't do anything (chemically) with it unless I ask and find out what it is? It would seem sanding/buffing might be better until I get some labeled metals!
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Old 03-18-2013, 03:54 AM   #39 (permalink)
 
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Correct. Without knowing you won't be able to predict the results.
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Old 03-18-2013, 10:53 AM   #40 (permalink)
 
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Steve
Word of caution with stainless steel though to electro polish it you use Perchloric acid, which is a superacid... a lot stronger than sulphuric or nitric, and it is an oxidising acid, hence why it is used in the manufacture of rocket fuel.

Admitedly, the below is from a 1000L bath of the stuff. But never the less due care and attention has to be made when even using small quantities of it.



Given its strong oxidizing properties, perchloric acid is subject to extensive regulations.[10] It is highly reactive with metals (e.g., aluminium) and organic matter (wood, plastics).

On February 20, 1947, in Los Angeles California, 17 people were killed and 150 injured when a bath, consisting of over 1000 litres of 75% perchloric acid and 25% acetic anhydride by volume, exploded. The plant, 25 other buildings and 40 automobiles were obliterated and 250 nearby homes were damaged. The bath was being used to electro-polish aluminium furniture. In addition, organic compounds were added to the overheating bath when an iron rack was replaced with one coated with cellulose acetobutyrate (Tenit-2 plastic). A few minutes later the bath exploded.

Work conducted with perchloric acid must be conducted in fume hoods with a wash-down capability to prevent accumulation of oxidisers in the ductwork.
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