Stripping Chrome Plating off a Pistol

italiansport

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Not a S&W but an early Luger I acquired. At some time it was chrome plated and I'm in the process of removing the plating prior to rust bluing. after looking at options I decided to submerse the parts in a Muratic Acid solution. What I couldn't find is how long it will take to strip the parts? If anyone has had experience please comment.
Jim
 
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I don't believe simple immersion in an acid will strip off chrome plating; I think it needs a reverse electroplating setup. Remove it from the acid immediately, immerse it in a solution of baking soda and then rinse it under running water. Contact someone like Accurate Plating & Weaponry or Ford's before you completely ruin the pistol.
 
OK, this misses the point of what kind of chrome are you talking about? Bumper chrome (popular back in the day) and industrial hard chrome? Bumper chrome is applied over a copper under plate. Industrial hard chrome is applied directly over prepped base metal.

The link doesn't specify what type of chrome is removed. It also doesn't mention safety precautions applicable to the type of chemicals in use or the strength. I didn't see anything about necessary neutralization processes either. The link suggests a 30% acid to water mix. THIS IS AN EXTREMELY HAZARDOUS CONCENTRATION! You're talking industrial strength acid mixes which would require some REALLY SERIOUS HAZMAT SAFETY MEASURES!

It also begs the question, exactly how are you planning on disposing of the mixture afterward? Got a hazmat site anywhere around?

I'd seriously suggest you inquire about having someone reverse electroplate the stuff off. If you tear it down and since there's no surface prep necessary, the price should be nominal. But hey, it's your gun, also your face, body and home.
 
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This is the same Muriatic acid that's added to swimming pools to lower the PH. We use it all the time for that purpose. It's nasty stuff and it will go to the proper disposal place when I finished but we in Arizona work with it all the time.The liquid solution I am using is diluted with water and in total I only have about a quart.
I have no way of telling what "type" of chrome this is specifically but I can tell you the mixture is bubbling which is an indication it's doing it's job.
I have checked repeatedly and see no damage being done whatsoever to the interior of the parts which are not plated. I'll update as this goes along.
If this doesn't work for whatever reason I'll try to find a plating place locally and go the traditional way.
Jim
 
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I worked in a plating shop, stripping hard chrome was done with HCL hydrochloric acid also known as muriatic acid.
When all the plating is gone the acid must be rinsed off and immediately neutralized in a mild alkaline solution.
Decorative chrome (bumper chrome) may be copper, then nickel then chromed. This is much more involved to remove the three (possibly) under plating.
 
I worked in a plating shop, stripping hard chrome was done with HCL hydrochloric acid also known as muriatic acid.
When all the plating is gone the acid must be rinsed off and immediately neutralized in a mild alkaline solution.
Decorative chrome (bumper chrome) may be copper, then nickel then chromed. This is much more involved to remove the three (possibly) under plating.

Mike:

What do you recommend that I use to neutralize as an alkaline solution?
Jim
 
Thank you; I know about baking soda but I believe these's other ingredients such as lemon.
Jim
 
There were a lot of pistols brought home after WW2 that were
chrome plated in Le Harve, France. I had a Colt 1911 that had
been chromed overseas. I decided I wanted a 45 Target made
up out of one of the several GI 45s I had at the time, 1970. My
smith was going to send it away for reverse electrolysis. My dad
thought he could do it with Alumilum Oxide with Air blaster that
they used on precision parts where he worked. He did a fine job.
Didn't round out lettering or any square edges. Our GS was
impressed, the gun was like a mirror. A short time later when
gun was being blued I got a frantic call from my GS. Dad had
removed most of the chrome but spots had been feathered in
that you couldn't see because of high shine. My GS was having
a fit, his reputation for blue was well known, he was nationally
rated. The pistol looked like a Pinto, perfect blue with little
Irregular spots of chrome. I had him leave it the way it was. I
don't name my guns but my buddies called it the Pinto Bean.
My dad did fool with some acid on other guns. He would take
them apart and dip them in paraffin wax. He would scape wax
off area he wanted to remove, leaving other areas protected by
Wax. He rinsed in distilled water with soda to stop acid.
 
Not a S&W but an early Luger I acquired. At some time it was chrome plated and I'm in the process of removing the plating prior to rust bluing. after looking at options I decided to submerse the parts in a Muratic Acid solution. What I couldn't find is how long it will take to strip the parts? If anyone has had experience please comment.
Jim
Midway USA had a video showing how to strip nickel or chrome using a mild acid and some batteries, essentially reverse electrolysis . You can probably find it with a simple search of their but uber videos.

Robert
 
With a P08 I wouldn't mess around myself, I'd send it down to Fords down in Florida. If it is chrome, it has an undercoating also.
Steve
 
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