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#1

Rattail-1927
Member
Joined: 06 July 2018
Posts: 84
Member
03 August 2018 02:42 pm

Ok so 4 weeks ago I decided to buy a metal detector, I bought a X-terra 705 and hit the beach .
I got 10 or $12 dollars in gold and silver coins, only thing is most of them are stained black.... so I get online looking for some way to clean them.
I tried vinegar, salt , baking soda and worked my way to caustic soda .... I might as well used water lol , so I get on line and see electrolysis.. the answer .... so I thought... I made a bath and tried it out, some sites say the negative for the coins and some say positive.
I thought I’ll try both... I let them go for about half an hour only to find the clamp had dissolved lol , no big deal I put another one on and left it again, only this time my black $2 coin was bright pinky copper colour ..... it must of worked to good so I put a twenty cent piece in and half an hour later it was clean but where the clamp was it was stained a copper colour which u guessed it.. won’t come off ....
SO I could use any idea for cleaning them as long as they don’t come out pinky / copper colour!!


X-Terra 705 Dual Pack , wireless headphone kit, Minelab Pro-Find 35 pinpointer , KT-6808 tumbler
Oldest Coin Found : Aussie 1948 Three pence

#2

1968falconxt
Member
From: , VIC
Joined: 29 January 2018
Posts: 282
Member
03 August 2018 03:45 pm

Use a tumbler with stones or stainless steel shot and detergent. That should get them cleaned right up. I built myself a big one but you can buy small ones pretty cheap on ebay.

#3

AussieChris
Member
From: Bathurst, NSW
Joined: 08 April 2015
Posts: 798
Member
03 August 2018 04:41 pm

Oh dear electrolysis can be pretty scary.

I collect Romans and I get quite a few of them that are so encrusted that distilled water soaks and olive oil soaks do bugger all to remove the 1800 odd years of buildup, especially if they come from Baltic countries. I use electrolysis on the coins that you can afford to ruin, that's pretty much what it comes down to.

I repurposed a 3V AC Adaptor, alligator clips, spoon etc. I have had some surprisingly good results. But electrolysis is truly the last resort, even cooking coins on the hotplate and dumping them in cold water or boiling them in olive oil is less destructive.

I have seen 2000 year Romans basically dissolve, or maybe the crust comes but takes the patina with it etc.

Every now and then you get a good result, your times are way off though lol. 30 mins is a bloody long time. Best going lightly, fizz it a bit and remove directly into some distilled water.

Hehe, good luck, be careful!

Modern coins, spendables, a tumbler is the go.


"About 10 minutes into it everything changed, buckets were flying ... people were bleeding. Girls were unconscious."

#4

moeee
Banned
From: St Albans, VIC
Joined: 29 June 2018
Posts: 337
Banned
03 August 2018 04:59 pm

Vogus cleans his coins with a pencil eraser


You can choose your friends but you can't choose your enemies

#5

AussieChris
Member
From: Bathurst, NSW
Joined: 08 April 2015
Posts: 798
Member
03 August 2018 05:30 pm

Yeah pencil erasers are great on silver


"About 10 minutes into it everything changed, buckets were flying ... people were bleeding. Girls were unconscious."

2 users like this post: Wishfull, crustydog

#6

Rattail-1927
Member
Joined: 06 July 2018
Posts: 84
Member
04 August 2018 10:39 am

Thanks guys for your help, the sites I seen gave the impression that the coins come out like new ... lol
I only wrecked less than $5 .... Ahh it’s kinda comical when I seen what happened and I lost two clamps as well but I thought I’m doing something wrong.... lol
I found a little cheap tumblr looks like plastic and steel balls for about $60 so next pay I’ll grab one, thanks again


X-Terra 705 Dual Pack , wireless headphone kit, Minelab Pro-Find 35 pinpointer , KT-6808 tumbler
Oldest Coin Found : Aussie 1948 Three pence

#7

Rattail-1927
Member
Joined: 06 July 2018
Posts: 84
Member
04 August 2018 10:57 am

By the way can anyone tell me how to upload photos to the site, I was going to show how the coins were but it keeps saying the file is too big, I’m trying from my iPhone
, Thanks


X-Terra 705 Dual Pack , wireless headphone kit, Minelab Pro-Find 35 pinpointer , KT-6808 tumbler
Oldest Coin Found : Aussie 1948 Three pence

#8

RockRat
Member
Joined: 26 May 2018
Posts: 372
Member
04 August 2018 12:04 pm

If image is too big i use https://compressjpeg.com ,free on line. easy to use.

#9

Heatho
Moderator
From: Central Coast, NSW
Joined: 29 April 2013
Posts: 14,112
Moderator
04 August 2018 12:48 pm

AussieChris wrote:

Oh dear electrolysis can be pretty scary.

I collect Romans and I get quite a few of them that are so encrusted that distilled water soaks and olive oil soaks do bugger all to remove the 1800 odd years of buildup, especially if they come from Baltic countries. I use electrolysis on the coins that you can afford to ruin, that's pretty much what it comes down to.

I repurposed a 3V AC Adaptor, alligator clips, spoon etc. I have had some surprisingly good results. But electrolysis is truly the last resort, even cooking coins on the hotplate and dumping them in cold water or boiling them in olive oil is less destructive.

I have seen 2000 year Romans basically dissolve, or maybe the crust comes but takes the patina with it etc.

Every now and then you get a good result, your times are way off though lol. 30 mins is a bloody long time. Best going lightly, fizz it a bit and remove directly into some distilled water.

Hehe, good luck, be careful!

Modern coins, spendables, a tumbler is the go.

Hey Chris, you sure you didn't mean DC adapter?


Minelab GPX 5000, SDC2300, CTX3030, Equinox 800, patience, lot's of patience.

#10

DonDieago
Newbie
Joined: 17 September 2021
Posts: 7
Newbie
18 September 2021 06:17 am

Rattail-1927 wrote:

Ok so 4 weeks ago I decided to buy a metal detector, I bought a X-terra 705 and hit the beach .
I got 10 or $12 dollars in gold and silver coins, only thing is most of them are stained black.... so I get online looking for some way to clean them.
I tried vinegar, salt , baking soda and worked my way to caustic soda .... I might as well used water lol , so I get on line and see electrolysis.. the answer .... so I thought... I made a bath and tried it out, some sites say the negative for the coins and some say positive.
I thought I’ll try both... I let them go for about half an hour only to find the clamp had dissolved lol , no big deal I put another one on and left it again, only this time my black $2 coin was bright pinky copper colour ..... it must of worked to good so I put a twenty cent piece in and half an hour later it was clean but where the clamp was it was stained a copper colour which u guessed it.. won’t come off ....
SO I could use any idea for cleaning them as long as they don’t come out pinky / copper colour!!

when I used electrolysis and when I do zinc plating on bike n auto parts I take a stainless spoon and bend it into a U shape and hang on container part in mixture and part not. then I clamp the wire to the spoon not in the mixture. Stainless will not contaminated your part your cleaning that is where your odd colors are coming from. And if you do multiple coins at once they all need to be the same. all silver all copper etc etc.


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