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  • 1 Post By FoodHunter
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Thread: Pink Brass

  1. #1
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    Pink Brass

    Scenario:

    Dirty cases need cleaning, so you put them in a stainless steel filings tumbler with some dish-detergent, citric acid, and warm water. You set the tumbler for three hours and then forget all about it until about 6 hours after you started the tumbler. When you pull out the brass, it has gone a pinky tinge.

    Research is done online but there is conflicting opinions in America as to whether the brass is compromised or just discoloured on the surface and another tumble will make 'em right as rain. Then your tumbler stops working so you can't try the latter. Finally you check on the NSHS forum to see what information there is and find a void in the imo's and personal experience... or at least there was until now. Happy Posting.

    PS - I have some pink brass for sale

    Cheers
    WillB likes this.
    The steaks are always high in the alps.

  2. #2
    Member Marty Henry's Avatar
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    Dezincification of brass is your answer. The alloy composition has changed some of the zinc has dissolved leaving only copper, its probably only the surface layer and a quick hand Polish of a case would show that. They should till be OK.
    Worst case there will be voids in the crystal matrix and the hardness of the remaining metal and it's elasticity will be compromised but this is unlikely unless the citric acid concentration was very high and the treatment period really prolonged,.

  3. #3
    I hunt, therefore I am.
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    Your brass has just come out of the closet... is it .270 by chance?
    Quote Originally Posted by 308
    not smart enough to be useful
    Diligentia Vis Celeritas
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  4. #4
    Member Cordite's Avatar
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    Quote Originally Posted by mimms2 View Post
    Your brass has just come out of the closet... is it .270 by chance?
    Or a girly calibre like .223
    Moa Hunter and dannyb like this.
    "I find television very educating. Every time somebody turns on the set, I go into the other room and read a book." Groucho Marx

  5. #5
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    7mm.08/ 308-able

    I was just thinking that pink brass, assuming the dezincification is only surface level, could actually be better than normal brass since it isn't exactly the same colour as literally every grass blade in existence

    ...

    Often thought what someone needs to do is find some way of making blue brass that doesn't effect reliability or safety - that would be great, no more lost brass!
    Moa Hunter likes this.
    The steaks are always high in the alps.

  6. #6
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    Gotta be creedmore brass
    veitnamcam and dannyb like this.

  7. #7
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    Quote Originally Posted by Cordite View Post
    Or a girly calibre like .223
    It's not the size, it's how you use it...
    Cordite likes this.
    Quote Originally Posted by 308
    not smart enough to be useful
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  8. #8
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    You did'nt by any chance use Tartaric acid in stead of Citric acid? I've used TA in the past and found that if the concentration was to strong the cases will have a pink tinge
    .

    Never made anything of it. Just tumbled the cases again, loaded and shot them.

  9. #9
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    Quote Originally Posted by Marty Henry View Post
    Dezincification of brass is your answer. The alloy composition has changed some of the zinc has dissolved leaving only copper, its probably only the surface layer and a quick hand Polish of a case would show that. They should till be OK.
    Worst case there will be voids in the crystal matrix and the hardness of the remaining metal and it's elasticity will be compromised but this is unlikely unless the citric acid concentration was very high and the treatment period really prolonged,.
    100% correct. It's why brass is not used marine enviroments. Seen brass basically turned into a sponge after sea water emersion.

  10. #10
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    If you dezincify the brass it's bad M'kay? That little bit of brass is holding 60,000psi or whatever 2" from your eyeballs, and pink isn't good around firearms. Period.

  11. #11
    Fulla
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    I noticed brass that was ejected on the grass would show up those grass marks pink after a clean. must be some kind of reaction. but never been a problem. I fire and clean/load fairly quick. if the brass was laying out in the grass or environment somewhere for ten years that might be different. if I was you I would clean and neutralize in warm soapy water then I can't imagine it being a problem, at least iv never had one.
    I bet you can't even feel any thinning in the pink area, yet we turn, or thin case necks all the time. and like was said steel wool will tidy it up, so how bad can it be.

 

 

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