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Posted: 7/2/2015 11:03:48 PM EDT
[#1]
Dawn can do it. I don't know the chemical reaction. I just know if you boil water and add brass and dawn, it does it. If you just add lemishine to boiling water, it won't. Water alone won't do it.
I used boiling water in my experiment because I wanted a faster reaction. I haven't tried vinegar and boiling water. I had the same thing happen when I used ultrasonic. I stopped cleaning with it. EDIT: If you tumble it, pink will come off. It's not deep. I don't know if it's a bad thing or not though. |
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Posted: 7/3/2015 12:01:35 AM EDT
[#2]
The pink color happens when the zinc is leached out of the surface of the brass, leaving only the copper.
Usually happens when the brass tarnishes and is exposed to an acid. It has little effect on the integrity of the brass, and tumbling will remove it. |
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Posted: 7/3/2015 8:56:25 AM EDT
[#3]
<removed> wrong forum for this nonsense. dryflash3
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Posted: 7/3/2015 9:46:01 AM EDT
[#4]
Happened to me when I used vinegar to clean some really dirty brass. It tumbled off just fine.
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Posted: 7/3/2015 9:56:23 AM EDT
[#5]
I do not think Dawn dish soap is the culprit. I have been using Dawn since I started wet tumbling and my brass comes out just right.
Vince |
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Posted: 7/3/2015 10:06:36 AM EDT
[#6]
Quote HistoryQuoted:
I do not think Dawn dish soap is the culprit. I have been using Dawn since I started wet tumbling and my brass comes out just right. Vince With heat it can. Try it. |
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Posted: 7/3/2015 3:49:06 PM EDT
[#7]
dezincification.
If limited to the surface it will likely not have any major effect on strength. If it comes off easily in polishing it is not going to be deep enough to matter. |
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Posted: 7/3/2015 5:16:59 PM EDT
[#8]
I picked up a batch of old 9mm wcc brass that must have been sitting in mud/muck for along time. Alot of the brass was rough and had dimples on it.
After tumbling all the dimples ect turned pink. I decided against using the brass and its sitting in a bag. |
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Posted: 7/3/2015 8:44:30 PM EDT
[#9]
Quote HistoryQuoted:
With heat it can. Try it. Quote HistoryQuoted:
Quoted:
I do not think Dawn dish soap is the culprit. I have been using Dawn since I started wet tumbling and my brass comes out just right. Vince With heat it can. Try it. Why would you heat it  . It cleans just fine as it is with tap water.
Vince |
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Posted: 7/3/2015 10:30:25 PM EDT
[#10]
Try using Lemi-shine instead of vinegar. If it still turns pink just reduce the amount of Lemi-shine until doesn't do it anymore. I use a 9mm case full in 1 gallon of water when I we tumble. I wouldn't think it's ruined from the vinegar.
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Posted: 7/3/2015 11:48:33 PM EDT
[#12]
Was there any steel cases in the mix? |
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Posted: 7/4/2015 9:23:27 AM EDT
[#13]
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Posted: 7/4/2015 12:32:02 PM EDT
[#14]
Tumble or vibrate in walnut polishing media to remove.
Vibratory cleaning wins again. 
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Posted: 7/4/2015 11:24:57 PM EDT
[#15]
There was no steel cases in the batch.
My Sonicor takes abt 96 oz of liquid so I should just use water with a 45acp casing of lemishine and a shot of dawn? Thanks for any responses. JBL |
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Posted: 7/5/2015 12:03:05 AM EDT
[#16]
Quote HistoryQuoted: There was no steel cases in the batch. My Sonicor takes abt 96 oz of liquid so I should just use water with a 45acp casing of lemishine and a shot of dawn? Thanks for any responses. JBL Those amounts are for 1 gallon of water, you will have to make adjustments. |
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Posted: 7/6/2015 2:08:47 AM EDT
[#17]
It seems I read somewhere that using hot water accelerates the de-zincing process and should not be used. Has anyone else come across this? In any case, I stopped using hot water in my wet tumbling.
I also got some dis-coloring in my brass after trying to dry it at too high a temperature in an oven. |
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Posted: 7/6/2015 7:44:29 PM EDT
[#18]
My tap water at work is over 140*F. From the hot water faucet. Yeah, it's hot. Took the 140*+ reading with a meat thermometer.
I have seen duller brass using the hot water. For me, the cold water gave me a brighter bling. Dawn, Lemi Shine, pins and water amount being the same. But using either gets my brass clean. Just shinier using cold tap water. |
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Posted: 7/6/2015 8:15:28 PM EDT
[#19]
I think vinegar is doing it. Something to do with reaction with zinc in brass. I wasn't very good in chemistry so check with a lab-geek.
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Posted: 7/6/2015 9:11:05 PM EDT
[#20]
Quote HistoryQuoted:
I think vinegar is doing it. Something to do with reaction with zinc in brass. I wasn't very good in chemistry so check with a lab-geek. You are correct. Acetic acid will make brass look nice and shiny. For a little while. Then they turn pink. It's the way the acid interacts with the copper and zinc in the brass. People have done all sorts of things to neutralize the acetic acid after cleaning the brass, but they only slow down the pink. CITRIC acid "passivates" brass, leaving a layer of modified brass on the outside. This is very resistant to tarnishing, allowing the brass to stay clean and shiny. LemiShine has citric acid as its primary active ingredient, with other ingredients that buffer both the acid and any other potential chemical contents of the water in your dishwasher. I haven't bothered to do any testing with citric acid for canning, but I'll bet it's just simpler to use LemiShine if you can get it. |
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Posted: 7/8/2015 10:57:23 AM EDT
[#21]
had a bunch of S&B 9mm red primer sealant cases in a batch once that stained my brass when wet tumbling once.
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