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      02-07-2024, 11:19 AM   #42
DrFerry
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Drives: '08 E92 M3
Join Date: Jul 2010
Location: Greenville, SC

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2008 BMW M3  [5.25]
2015 BMW X5  [4.50]
Quote:
Originally Posted by Dan B View Post
Galvanic corrosion is when dissimilar metals are in contact with each other. This is not galvanic corrosion. We had shops in Florida and Wisconsin and stored hundreds of rims as well as many shops tool that didn't make the seasonal traveling with the team, and I have never see corrosion like this after 1 season let alone several seasons. This looks to be corrosion cause by exposure to something caustic. Ask to look at the inside of the shipping container and see if it shows signs of corrosion. Make sure to look at the floor of the container. It it does I suspect they stored something like chlorine in the container, it froze (no, not pure chlorine but something like pool shock) and leaked. Then with warming and cooling cycles the humidity in the container rose and it caused the corrosion.
Interesting theory. You might very well be right. Especially given your experience and expertise in the wheel storage business.
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katkins Here's some photo examples below of alloy wheel salt corrosion and the source links. The damage to your wheels looks a little more 'wet', bubbly or 'pliable' than it is dry and flaky (as seen in the example photos below). This perhaps supporting Dan B 's theory of caustic corrosion by gas or fluid.
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https://curateview.com/remove-corros...uminum-wheels/
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https://www.wheelworlddigest.com/decoding-rim-damage
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https://www.wheelrepairsyorkshire.co.uk/#contact-us
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Please report back and let us know how all of this works out. I'm sorry this has happened to you (and your winter wheels and tires).
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