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Dronne
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PostSubject: parkerisation   Wed Jul 31, 2013 10:08 am

Hi,
We know that cold blueing works with zinc alloys (several examples can be seen on this forum), but is parkerisation can also work?

Here is a quick recipe for "cold" parkerisation for steel or iron:

400ml of phosphoric acid.
200ml of sulfuric acid.
250ml of water.
Soak time : 1 to 2 hours.

But, anyone can tell if it will work with zinc alloys?
Thank you.
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claymore
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PostSubject: Re: parkerisation   Wed Jul 31, 2013 5:29 pm

I have a horrible feeling it would dissolve with all that acid Shocked 
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Dronne
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PostSubject: Re: parkerisation   Wed Jul 31, 2013 5:59 pm

Hi claymore,
Don't be so afraid, the volumes are in metric system! Very Happy
0.088 gal  of phosphoric acid.
0.044 gal of sulfuric acid.
0.055 gal of water (or more to enhance dilution)

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Cerwyn
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PostSubject: Re: parkerisation   Thu Aug 01, 2013 9:54 am

Hi Dronne

I also worry that Zinc Alloy may be damaged by using acids but do not know for sure.
Perhaps you could try with an old broken zinc alloy part and let us know the results Question 
Parkerised finish would be well suited to several models if it works Smile 

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Dronne
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PostSubject: Re: parkerisation   Thu Aug 01, 2013 10:26 am

Hi Cerwyn,
I asked for somebody outside the forum, and also suggested him, exactly what you wrote.
It's for an airsoft M3 submachine gun (ics200).
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Cerwyn
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PostSubject: Re: parkerisation   Thu Aug 01, 2013 11:40 am

Checking WGSshop.com's site, the ICS M3 Grease Gun is made of Aluminium Alloy with some ABS parts. (http://www.wgcshop.com/wgc2008/main/product_detail1.php?search_From=category&item=ICS-AEG-M3&search=category&rs=SMG %26 PDW - Electric&catid=1&cat=902 )
It'll be worth confirming this before taking it anywhere near acids pale 

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Dronne
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PostSubject: Re: parkerisation   Thu Aug 01, 2013 12:37 pm

Yes, you're right pale
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GZ22
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PostSubject: Re: parkerisation   Thu Aug 01, 2013 11:47 pm

The Parkerizing process will only work on ferrous metals as it is a 'conversion coating' process. (As the acids dissolve the surface of the metal, the phosphate ions are deposited on the surface).

Please always remember when working with sulphuric acid - never add water to it - always add acid to water!
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8ace
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PostSubject: Re: parkerisation   Fri Aug 02, 2013 8:47 am

Good call GZ22 as it's a very important point when dealing with acids.

Both of the acids in the mix will attack pure zinc and phosphoric acid is used as an aluminium etch, so i think it will cause issues with modelguns.

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Dronne
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PostSubject: Re: parkerisation   Fri Aug 02, 2013 11:55 am

Hi every body,
So, it will not work. No 
Thank you four your advices, i transmitted.
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Dronne
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PostSubject: Re: parkerisation   Mon Aug 05, 2013 8:00 pm

Hi,
THe guy finally used a cold blueing
Here the almost final result :
Before :


After



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smootik
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PostSubject: Re: parkerisation   Tue Aug 06, 2013 9:05 am

Is this that rare Hudson version of M3A1 Grease Gun?
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Dronne
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PostSubject: Re: parkerisation   Tue Aug 06, 2013 10:59 am

Hi,
Oh, no! Only an airsoft M3 submachine gun (ics200)
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