Copper Gas check corrosion

[6622729]

I have factory purchased and self stamped Pat Marlins copper gas checks and they all look great. I didn't run out all of my copper sheeting last time I was stamping gas checks. I noticed several out of a hundred or so flat disks have discolored? Any idea what that is about? Is there something I can spray and tumble on my gas checks to help preserve them?

[elwood4884]

Gas checks will discolor if stored in open air. This is a natural process of copper oxidation. To prevent this they should be stored in a airtight container with a copper corrosion prevention medium like Coppertex. This is a commercial copper preservative paper that offgasses an inert protective coating. Many commercial gas check manufactures provide some type of preservative.

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[6622729]

Ok, so as I have a lifetime supply, how do I protect them at home? They are in an airtight container. They need some sort of preservative.

[elwood4884]

This is what we are using: https://www.amazon.com/s/ref=nb_sb_n...ords=Coppertex . Obviously a little pricy if your just using it for yourself. We cut it into one inch squares and put in with our checks. Maybe something like this would work for you: https://www.amazon.com/Armor-Protect...rds=Copper+VCI

[JonB_in_Glencoe]

verdigris or age tarnish ?
or some other corrosion?

If verdigris, is there some animal fat in the lube that you are using on your dies?
Or maybe something transferred from your fingers?

When there was some discussion about certain types of lube ingredients that can corrode GC's installed on lubed boolits during long term storage, I started a long term experiment with copper GC'd boolits lubed with SL68B. I'm just beyond two years, still no corrosion.

[too many things]

try the little desiccant bags
now for where to get them free
go to a home depot or lowes
where the copper caps are for the posts most HD stores are same so asle 22 they have the boxes of copper and wood caps . we didnt take them out so there is 4 in each of the boxes . and they stock about 4 types . ask one of the guys and he may save them for you.
they are also in the door jamb and casing boxes . but you would have to be instore when they come in . most times every 2 weeks

[6622729]

I found a company online that markets beads and jewelry related craft pieces that sells small sheets of Coppertex. I bought a pack and some more 50 caliber ammo boxes. I'll move all of my copper jacketed bullets, copper plated bullets and copper gas checks into those. They'll be airtight and have Coppertex in each one.

[mold maker]

Ask your druggist to save the packets that come in bulk drugs. They can be recharged as any other in an oven at 220 for an hr.
Store with your copper disc in an airtight container and there should be no tarnish or worse, because of the lack of moisture.

[gwpercle]

Dark brown or green ?
Dark brown is just natural darkening of copper , it's not a problem.
Green is verdigris a type of oxidation and you want to stop it. Moisture usually triggers it. It may appear as white or very pale green also .
I spray mine with WD40 , water displacement properties of WD40 work well in this instance.
Gary

[6622729]

Dark brown or green ?
Dark brown is just natural darkening of copper , it's not a problem.
Green is verdigris a type of oxidation and you want to stop it. Moisture usually triggers it. It may appear as white or very pale green also .
I spray mine with WD40 , water displacement properties of WD40 work well in this instance.
Gary

Dark Brown. No green.

[skeettx]

Use them as is, no issues

[gwpercle]

Dark Brown. No green.

They are OK , mist them with a bit of WD40 just to be on the safe side. It won't stop darkening but will stop greening by displacing moisture. I do this to all my copper checks.
Gary

[elwood4884]

Just be on the safe side to keep wet WD40 away from powder.

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