cuongdyna

I was rotating my tires today. This is what I came across. What can I do to prevent the rest from coming back again?

karls

That would be corrosion.....some wd-40 would kill the corrosion. I would suggest some anti-sieze on there after you clean them up.

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Ghost63

Galvanic corrosion - dissimilar metals in contact in the presence of moisture. One metal becomes an anode and the other is the cathode. Basically it is the same reaction as a battery, and ions are being conducted from one surface to the other. A good cleaning and a light coat of anti-seize to keep moisture out should do the trick.

tribulation138

Huh.. my spacer nuts are aluminum not steel

Jonathan_JK

X2^^^^ yep deal with that all the time. Just clean it up that's all you can really do.

Jonathan_JK

The nuts if they are aluminum... Are in contact with steel which is causing a reaction. The electrons of the different metals are causing the corrosion.

cuongdyna

Thanks everyone I'll use some anti Seize.

TINMAN080

I've never seen aluminum lug nuts, only steel. When a lug stud has a lug nut screwed onto it, any corrosion coating or protection is scuffed off the threads. A light rust sometimes will form. No big deal as far as function goes. I would be extremely careful using anti-seize compound on any lug nut/ stud assembly, especially a double set such as wheel spacers. The lug nuts remain tight by the torque applied actually ''seizing'' the thread surfaces of the lug nut and stud and the face of the lug nut upon the wheel. All shop manuals recommend dry lug nuts and studs.