Wheel Hub Rust - Mercedes-Benz Forum

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post #1 of 3 (permalink) Old 11-01-2003, 04:24 AM Thread Starter
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Wheel Hub Rust

I have a garaged 4 month old 2003 SLK230, on my rear wheel hubs the part that touches the wheels has a bad case of rust over the grey paint, especially the left one. Any ideas???
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post #2 of 3 (permalink) Old 11-01-2003, 05:22 AM
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Lets see, machined bare metal, a trans Atlantic ocean voyage in a ship....

actually you can and should expect rust on lightly painted and unprotected metal parts, it's a fact of life.[:(] The paint on the hubs is only to protect the hubs while in storage, on a shelf somewhere.[:(!]
If you want to repaint these parts, they have to come off, be cleaned and painted with high temperature paint. (Engine block paint works fine.)[:p]

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post #3 of 3 (permalink) Old 11-01-2003, 01:37 PM
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I'm not sure what ideas you're looking for but:

If you want to know how to prevent the rust, you have to paint the steel with high-temp paint, or have them cadmium plated, etc.

If you want to know how to prevent the aluminum wheels from sticking to the hubs, you put a very thing coating of anti-seize compound on the machined surface before you install the wheel. This is the same stuff you use on spark plugs, etc.

If you want to know why they rusted to begin with, it's because they are dissimilar metals. Any spot where bare aluminum touches bare steel will rust if there's water around, including just humidity.

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