darchard

Just had my breaks replaced. The job included rotors and pads. Within a week I have rust build-up behind the rim. There is no rust where the pads come in contact with the rotors. Could this become a problem? It looks horrible! Is there an esthestic fix? I don't like rust on my GS!

GSquicksilver

this is normal with standard rotors. if you don't want the rust, paint the rotors.

mikevanle

iTrader: (1)

Rust on the rotors is common. If you leave the car overnight and it rains, you'll probably see rust on the surface even just one day. It'll be get rid of when you use the brakes.

As far as the cooling vents and stuff, the only way to prevent it is to powdercoat the whole rotor, then machine off the surface area. That's probably cost more than effectiveness anyways.

ElitistK

iTrader: (4)

anodizing it should keep the rust off, but of course, it's going to cost more than what the stock rotor's worth anyway. most aftermarket rotors are anodized.

mobilyte

iTrader: (3)

you cant anodize steel/cast iron! anodization is a process that deliberately forms an oxide layer of equal thickness on and penetrating the surface of the workpiece. what happens to steel when it rusts? it flakes, whereas aluminum pits. even anodizing wont completely prevent pitting in aluminum.

some aftermarket rotors are zinc plated or have a coating that resembles anodization to inhibit rust. when doing the brakes on my friend's benz, i noticed the rotors he got from the dealership had a coating that resembled primer. the coating on the braking surface is sloshed off after a few cycles. his old rotors were relatively rust free, but my rotors rust enough that i can shake the flakes out of the vanes.

2 piece rotors usually have an anodized aluminum hat to reduce weight (compared to a single cast piece), the hat is expected to last long enough to go through several vaned rotor replacements.

darchard

I had my GS in for a balance and alignment and the tech cleaned for the rust and applied some type of high temp coating to the hub of the rotors. Looks great. It will be interesting to see if it lasts.

GSquicksilver

if he painted the hats on the rotors with high temp paint, you should be fine for at least a year or more, depending how picky you.

Lexigo400

You need to look at Cadmium coating the rotors. wont rust, wont come off.


Lexigo400

KRGS4

Yup

Cadmium will not have rust but will have Bronze Gold look.

I went with the SILVER ZINC washed/coated Drilled and slotted rotors.

No rust. shines like an exotic. Have been using these Zinc coated rotors since 1999. In fact I'm running them on three cars presently.

JeffTsai

iTrader: (1)

All rotors will get rusted no matter what. It can show up in as little as 20-30minutes after a light rain. A little driving around will scrub the rust off right away. If you're referring about the hat area rusting, then get a coated rotor as others have mentioned here.