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#1

trev111
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Joined: 06 August 2014
Posts: 55
Member
20 July 2015 02:55 pm

Hi all,,
I have used white vineger and salt to clean my modern coins with some success.
However, the other day I used the same solution, which had been used with many coins which left the coins with a green coating. This was washed off in fresh water and dried. The coins were then clean/. After a couple of weeks, I checked out the coins and found that they were thickly coated with the green. I then tried to remove it with water and found it was near impossibly to do
Since throwing out the solution, I have been able to clean other coins that have been collect.
It looks like I overused the solutionAny ideas of how to clean the green off the orig, coins.

Trev111]

#2

Ramjet
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From: Maitland, NSW
Joined: 19 February 2013
Posts: 12,716
Moderator
20 July 2015 03:18 pm

Green from copper maybe? Clean any copper coins?


Touch the Frog.
Garrett At Pro, XP Deus, CTX 3030, pin pointer. Oldest find 1807 halfpenny, oldest silver 1854 threepence.

#3

rocketaroo
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Joined: 11 January 2015
Posts: 4,608
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20 July 2015 04:02 pm

We talking spendables? Stick em in a vice, and use a wire brush.


Greg from Newcastle NSW, XP Deus rocks. Oldest Coin English 1853 Silver Groat/four pence.

#4

silver
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Joined: 19 December 2013
Posts: 10,724
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20 July 2015 09:10 pm

or a wire brush on a drill,...... I have a board somewhere with shallow holes drilled with spade bits, that are only half the depth of the coin sizes they hold,... you just pop the coins in and hold the drill wire brush down on them untill they are shiny, then turn them over and repeat on the other side,... use safety glasses and protect your eyes at all times(you only get two of them for each lifetime). smile

rocketaroo wrote:

We talking spendables? Stick em in a vice, and use a wire brush.


What a great day ! ,... " I'll see you in the field ".

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#5

trev111
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Joined: 06 August 2014
Posts: 55
Member
21 July 2015 03:37 pm

possibly from copper coins. Also pennys and 1/2 pennys are also green. How to clean these without damaging

#6

silver
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Joined: 19 December 2013
Posts: 10,724
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21 July 2015 04:26 pm

Not a pile of 1930 Pennies and 1923 Halfpennys ? with a few 1916 Mule Halfpennys here and there ?,.... is it ? yikes

Last edited by silver (21 July 2015 04:27 pm)


What a great day ! ,... " I'll see you in the field ".

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#7

trev111
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Joined: 06 August 2014
Posts: 55
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22 July 2015 02:57 pm

Hi Silver,

No such luck1111

1 user likes this post: silver

#8

Zorgs
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From: Adelaide, SA
Joined: 02 July 2015
Posts: 122
Member
22 July 2015 03:36 pm

Toothpaste for modern coins?

When I was a kid, I accidentally dropped change into a tin of ceiling or wall paint. When my dad found them (he was a painter) he commented that they were all shiny and new looking after a wash with water. So there's one to try!

#9

silver
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Joined: 19 December 2013
Posts: 10,724
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22 July 2015 03:44 pm

Some where I read about a wind powered tumbler that cost nothing to run and turned out clean decimals( with just a bit of sand thrown in). wink


What a great day ! ,... " I'll see you in the field ".

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#10

TheSilentBugler
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From: Bass Coast, VIC
Joined: 15 October 2013
Posts: 629
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22 July 2015 03:47 pm

Yeah, a tumbler would work a treat.


Everything happens for a reason. Sometimes the reason is that you're stupid and make bad decisions.

#11

Zorgs
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From: Adelaide, SA
Joined: 02 July 2015
Posts: 122
Member
08 August 2015 07:25 pm

Been doing a bit of testing and best bang for buck and minimal effort has been Hydrochloric acid so far. I tried some silver/gold/copper coins, took about 30 seconds in solution to clean all the black/dirt away.

I'd probably dilute it for a large lot and let it sit for a couple of minutes with a bit of agitation, then rinse with water.

Note it will slightly pit some coins. This is for clean and spend only, make sure the 20 isn't a florin! I guess composition changed some years because some of the same denomination coins are bright and some are dull!

Apologies if it's been covered before.

2 users like this post: silver, AngerManagement

#12

Wookiee
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Joined: 07 January 2016
Posts: 75
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08 January 2016 07:22 am

Ranex if you can find it. Not sure if they still sell it. It's a mild acid based stuff used for cleaning aluminium and other metals.
Usually found at Auto parts stores.

Alumabrite (think the spelling is correct) works as well.

Wear gloves with both of the above. Water will neautralise the acid.


Current gear: X-Terra 705 Dual, Minelab Pro Find 25, Coiltek 15" WOT II 18.75kHz, Alloy sandscoop.

#13

AtomRat
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From: Katazone, VIC
Joined: 22 May 2014
Posts: 5,066
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08 January 2016 10:01 am

I probably wouldnt use hydrochloric acid if the money is going back to the bank...everyone would have very itchy pocket regions..
Could damage the coins and also let off a few nasty gasses like chlorine

Quite honestly..I havnt tried it but Coca Cola should work fine on moderns having a high content of phosphoric acid ( alloy cleaner )


Wisdom is knowing how little you know

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#14

numpty
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From: oil rig, VIC
Joined: 09 July 2015
Posts: 884
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08 January 2016 05:06 pm

i use a rust treatment, has phosphoric acid in it, just pop them in for 2-3 minutes, brush and wash.

use some cloves though.

1 user likes this post: Wookiee

#15

Wookiee
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Joined: 07 January 2016
Posts: 75
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09 January 2016 01:02 am

numpty wrote:

i use a rust treatment, has phosphoric acid in it, just pop them in for 2-3 minutes, brush and wash.

use some cloves though.

Sounds similar to Ranex and Alumabrite. smile

Another one someone told me about ages ago is Citric acid. Can get it at supermarkets cheaply and isn't toxic like other acids, but will take a bit longer. Haven't tried it, but worth a shot.


Current gear: X-Terra 705 Dual, Minelab Pro Find 25, Coiltek 15" WOT II 18.75kHz, Alloy sandscoop.

#16

silver
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Joined: 19 December 2013
Posts: 10,724
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09 January 2016 01:23 am

Wookiee wrote:
numpty wrote:

i use a rust treatment, has phosphoric acid in it, just pop them in for 2-3 minutes, brush and wash.

use some cloves though.

Sounds similar to Ranex and Alumabrite. smile

Another one someone told me about ages ago is Citric acid. Can get it at supermarkets cheaply and isn't toxic like other acids, but will take a bit longer. Haven't tried it, but worth a shot.

oranges and limes(citric acid) kill coppers,.... believe me, I know(ha). yikes big_smile wink


What a great day ! ,... " I'll see you in the field ".

1 user likes this post: Wookiee

#17

mfdes
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From: Hobart, TAS
Joined: 18 November 2013
Posts: 585
Member
09 January 2016 07:49 am

Hi Trev,

From what I read on your original post, I'd say use the same solution, if it works. I reckon the coins turned green again after cleaning because they still had some acid clinging to them (acetic acid from vinegar, and the green would probably be copper acetate). They might be more stable if you neutralised them in a dilute bicarb solution overnight.

When I've been cleaning nuggets in any acid, I neutralise them in bicarb for a couple of days, then soak them in tap water for another day or so to remove any residues. The same should apply to modern coins.


SDC 2300. Tasmanian mad about sapphires and gold.
Check out my blog about prospecting in Tasmania: http://www.appleisleprospector.com/

1 user likes this post: silver

#18

Goldpick
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From: Mount Gambier
Joined: 07 November 2013
Posts: 6,521
Moderator
10 January 2016 12:26 am

If you can afford a decent gem tumbler, by far the easiest way to clean bulk anounts of spendables minus the chemicals, mess and physical effort. Nothing worst than being left with used chemicals and acids and having no appropriate method of disposal available to you. Making your own rumbler is also another option, has been covered on some other topics. smile


Prospecting gear: Used - Whites GM3, GM2, GMT, ML XT17000, ML X-Terra 305, Garrett Gold Stinger, Tesoro Vaquero, Nokta RS pinpointer, Minelab Explorer SE Pro/Etrac, Ace 250
Current - XP Deus, Makro Racer 2, Fisher F75, Tesoro Tejon, Teknetics G2, Whites SPP, Garrett Infinium, Minelab Go-Find 60, XP MI-6, Minelab Profind, Whites Bullseye TRX, Deteknix X-pointer, Garrett AT Pointer

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#19

B5MECH
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From: Yamums, NSW
Joined: 25 January 2016
Posts: 2,677
Member
22 November 2016 03:50 pm

Has any one tried CLR solution or chlorine to get rid or the corrosion on decimal copper nickel coins
I thought a soak and wash should do, just don't have either of them ATM to test with
I would expect CLR to work but thought chlorine would be the cheaper option glasses


A Crystal Ball....a Magic Wand....a Weegie Board....two Dowsing Rods
..............................And lots of Bee's.................................

#20

B5MECH
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From: Yamums, NSW
Joined: 25 January 2016
Posts: 2,677
Member
22 November 2016 04:19 pm

Had a quick go with vinegar and salt, roll used the wrong coin for that experiment took less than 10 minutes and now looks like it's been sandblasted cry
1479791912_fffffffffffffffffffffffffffffff_001.jpg
1479791912_fffffffffffffffffffffffffffffff_002.jpg
1479791912_fffffffffffffffffffffffffffffff_003.jpg
1479791912_fffffffffffffffffffffffffffffff_004.jpg
definatily cleans them though roll lol lol lol lol lol lol

Last edited by B5MECH (22 November 2016 04:19 pm)


A Crystal Ball....a Magic Wand....a Weegie Board....two Dowsing Rods
..............................And lots of Bee's.................................

#21

silver
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Joined: 19 December 2013
Posts: 10,724
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22 November 2016 09:09 pm

Experimentation is the way to go ,...... like putting liquid paper on a bee ! tongue


What a great day ! ,... " I'll see you in the field ".

1 user likes this post: B5MECH

#22

B5MECH
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From: Yamums, NSW
Joined: 25 January 2016
Posts: 2,677
Member
22 November 2016 09:12 pm

Won't try that again on a good coin lol lol lol


A Crystal Ball....a Magic Wand....a Weegie Board....two Dowsing Rods
..............................And lots of Bee's.................................

1 user likes this post: silver

#23

silver
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Joined: 19 December 2013
Posts: 10,724
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22 November 2016 09:17 pm

Maybe less dip n more rub on a who cares coin for the experimentation ,.... if all fails you can just spend them away forevermore ! wink


What a great day ! ,... " I'll see you in the field ".

1 user likes this post: B5MECH

#24

Ramjet
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From: Maitland, NSW
Joined: 19 February 2013
Posts: 12,716
Moderator
23 November 2016 08:50 am

Saw this on a facebook page.

1479851377_screenshot_20161123-084657.jpg
1479851378_screenshot_20161123-084706.jpg


Touch the Frog.
Garrett At Pro, XP Deus, CTX 3030, pin pointer. Oldest find 1807 halfpenny, oldest silver 1854 threepence.

1 user likes this post: B5MECH

#25

Sandta
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From: Newcastle, NSW
Joined: 04 June 2014
Posts: 3,083
Member
23 November 2016 01:55 pm

I think Bunnings sales are suddenly going to increase roll

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