Message:

<p>[QUOTE=&quot;BadThad, post: 2851878, member: 17261&quot;]The covalently bound chlorine is not the threat to metals but it certainly is once the PVC starts to breakdown. We use various chlorinated oils in metalworking. If they caused corrosion on customer parts, we wouldn&#039;t sell much of those type of fluids. </p><p><br /></p><p>I as recall from previous readings, the plasticizer is the problem with coin holders. I&#039;m not the organic chemist - but apparently it somehow accelerates the PVC degradation to form HCl. Which is extremely damaging to metal. The root of the problem is storage conditions. I&#039;ve seen very old PVC holders that were fine. I wouldn&#039;t keep using them but the coins were still fine. I suspect those owners did a good job in their storage.[/QUOTE]</p><p><br /></p>

Your name or email address:

Do you already have an account?

• No, create an account now.
• Yes, my password is:
• Forgot your password?

Stay logged in