Rotor Rust After Three Days
08-13-2012, 10:30 AM
#1
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Rotor Rust After Three Days
Just replaced brand new rear rotors three days ago. I didn't use OEM this time. They are expensive, instead, I used the Brembo blank rotors and thought they must have very good quality.
But, after just three days, they start to rust. Any idea what I should do? Even the OEM rotor doesn't rust this fast.
But, after just three days, they start to rust. Any idea what I should do? Even the OEM rotor doesn't rust this fast.
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kvan2007 (10-09-2012)
08-13-2012, 10:36 AM
#3
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It's the hub and edge, I will post some pictures. Maybe I should paint it. But really nor sure how long it can last.
08-13-2012, 10:38 AM
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What he said ^^
Moisture builds up on the rotor face and starts to rust, it happens, once you drive it again it'll wipe them clean again.
Only way of stopping the rust is getting something like the Brakemotive package, they're coated in zinc and do no rust.
Moisture builds up on the rotor face and starts to rust, it happens, once you drive it again it'll wipe them clean again.
Only way of stopping the rust is getting something like the Brakemotive package, they're coated in zinc and do no rust.
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sauceja (08-14-2012)
08-13-2012, 10:39 AM
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justnspace (08-13-2012)
08-13-2012, 10:45 AM
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08-13-2012, 10:59 AM
#11
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Here are the pictures, just after three days, one storm in the weekend.
Brembo rotors seem to be a joke for me. Even thinking of getting a pair of new rotors.
Shall I just paint the hub and edge or get a new pair of better ones? Confused, or just leave as is
Brembo rotors seem to be a joke for me. Even thinking of getting a pair of new rotors.
Shall I just paint the hub and edge or get a new pair of better ones? Confused, or just leave as is
Last edited by summerayu; 08-13-2012 at 11:05 AM.
08-13-2012, 10:59 AM
#12
Uh....Obviously cast iron is going rust. Duh. All uncoated rotors will rust. It doesn't mean they are crap quality. Racing rotors rust. Expensive, cheap, etc... all rust. It's high quality iron. If you didn't want rust, you should have bought coated rotors. Brembo doesn't make zinc coated blank rotors. They only coat their overpriced slotted/drilled stuff. Centric Premium rotors have a black e-coating on all non-friction surfaces and cost about half as much as Brembo blanks. Centric FTW!
Last edited by 94eg!; 08-13-2012 at 11:02 AM.
08-13-2012, 11:11 AM
#13
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It's completely normal, especially if it's rained.
08-13-2012, 12:21 PM
#15
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08-13-2012, 12:22 PM
#16
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08-13-2012, 12:24 PM
#17
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Uh....Obviously cast iron is going rust. Duh. All uncoated rotors will rust. It doesn't mean they are crap quality. Racing rotors rust. Expensive, cheap, etc... all rust. It's high quality iron. If you didn't want rust, you should have bought coated rotors. Brembo doesn't make zinc coated blank rotors. They only coat their overpriced slotted/drilled stuff. Centric Premium rotors have a black e-coating on all non-friction surfaces and cost about half as much as Brembo blanks. Centric FTW!
08-13-2012, 02:18 PM
#18
If you're that worried about an uncoated brake rotor rusting, you can always go for a 2 piece rotor with an anodized aluminum center hat. The braking surface, vents, and edges are still going to rust, but at least the hat won't. They're not cheap.
The rust in no way indicates the brakes quality, it just indicates you have bare cast iron exposed to air and moisture. Coatings and paint will definitely slow this process, but it will still occur. A quick spray with high temp paint on cheap rotors usually looks good for at least 6 months. If you store your car outside, get a lot of rain, or live in an area that salts the roads, expect no more than a year before the rotors look terrible. If you baby the car they might be fine until they need to be replaced.
You sound like a good candidate for cheap rotors and a rattle can of high temp black. It's fairly effective. Worst case, is you can pull the rotors every 6 months and repaint them. It's not very hard to do. Don't paint a rotor with it on the car.
The rust in no way indicates the brakes quality, it just indicates you have bare cast iron exposed to air and moisture. Coatings and paint will definitely slow this process, but it will still occur. A quick spray with high temp paint on cheap rotors usually looks good for at least 6 months. If you store your car outside, get a lot of rain, or live in an area that salts the roads, expect no more than a year before the rotors look terrible. If you baby the car they might be fine until they need to be replaced.
You sound like a good candidate for cheap rotors and a rattle can of high temp black. It's fairly effective. Worst case, is you can pull the rotors every 6 months and repaint them. It's not very hard to do. Don't paint a rotor with it on the car.
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justnspace (08-13-2012)
08-13-2012, 02:30 PM
#20
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If you're that worried about an uncoated brake rotor rusting, you can always go for a 2 piece rotor with an anodized aluminum center hat. The braking surface, vents, and edges are still going to rust, but at least the hat won't. They're not cheap.
The rust in no way indicates the brakes quality, it just indicates you have bare cast iron exposed to air and moisture. Coatings and paint will definitely slow this process, but it will still occur. A quick spray with high temp paint on cheap rotors usually looks good for at least 6 months. If you store your car outside, get a lot of rain, or live in an area that salts the roads, expect no more than a year before the rotors look terrible. If you baby the car they might be fine until they need to be replaced.
You sound like a good candidate for cheap rotors and a rattle can of high temp black. It's fairly effective. Worst case, is you can pull the rotors every 6 months and repaint them. It's not very hard to do. Don't paint a rotor with it on the car.
The rust in no way indicates the brakes quality, it just indicates you have bare cast iron exposed to air and moisture. Coatings and paint will definitely slow this process, but it will still occur. A quick spray with high temp paint on cheap rotors usually looks good for at least 6 months. If you store your car outside, get a lot of rain, or live in an area that salts the roads, expect no more than a year before the rotors look terrible. If you baby the car they might be fine until they need to be replaced.
You sound like a good candidate for cheap rotors and a rattle can of high temp black. It's fairly effective. Worst case, is you can pull the rotors every 6 months and repaint them. It's not very hard to do. Don't paint a rotor with it on the car.
This is what I bought, I guess I will just paint the hub and leave it.
Still, quite lazy to take the rotor off, that's probably why I just choose the caliper paint kit with the brush option instead of spraying. Don't know how well it's gonna be, what do you think?
08-13-2012, 02:30 PM
#21
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08-13-2012, 02:37 PM
#23
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^^^ that rust is on the "hat" as well as the unused rotor surface....
as Justin said, dont worry about the rust....just spray the "hat" to your color preference with a high heat paint and call it a day
while at it, also paint your calipers...
as Justin said, dont worry about the rust....just spray the "hat" to your color preference with a high heat paint and call it a day
while at it, also paint your calipers...
08-13-2012, 03:20 PM
#24
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Was also thinking of putting the rear caliper cover (RDX one). So not sure whether need really to paint the caliper. Maybe I'll just leave the caliper as is with the RDX cover on it.
08-13-2012, 03:43 PM
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^^^ now you are improvising
08-13-2012, 07:06 PM
#26
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08-13-2012, 09:07 PM
#27
If you only care about the hat, you can do it on the car, but you might want to brush it on to avoid overspray. Any 'high heat' stuff works fine. I sprayed high heat matte black over semi-rusted rotors with literally zero prep before and it looked fine for quite a while.
When I got my TL, the rear brakes were close to new but quite rusted. I pulled the rotor and spray painted the whole thing, front and back. I made some attempts to miss the friction areas, but a few brake slams and riding the handbrake at speed cleaned them right up. Now theres a perfect line and all areas that aren't in contact with pads are coated. It's been a few months and it still looks great.
When I got my TL, the rear brakes were close to new but quite rusted. I pulled the rotor and spray painted the whole thing, front and back. I made some attempts to miss the friction areas, but a few brake slams and riding the handbrake at speed cleaned them right up. Now theres a perfect line and all areas that aren't in contact with pads are coated. It's been a few months and it still looks great.
08-14-2012, 10:35 AM
#30
the overexplainer
eh, my Brembo blanks purchased from an Acura dealer dont look like that, even after 1 year. Granted, they're not completely rust-free but the hub looks fine on the front rotors.
edit: nvm, you are talking of your rears. Mine are the ones that came with the car so not sure what brand they are.
edit: nvm, you are talking of your rears. Mine are the ones that came with the car so not sure what brand they are.
08-14-2012, 01:28 PM
#31
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If you only care about the hat, you can do it on the car, but you might want to brush it on to avoid overspray. Any 'high heat' stuff works fine. I sprayed high heat matte black over semi-rusted rotors with literally zero prep before and it looked fine for quite a while.
When I got my TL, the rear brakes were close to new but quite rusted. I pulled the rotor and spray painted the whole thing, front and back. I made some attempts to miss the friction areas, but a few brake slams and riding the handbrake at speed cleaned them right up. Now theres a perfect line and all areas that aren't in contact with pads are coated. It's been a few months and it still looks great.
When I got my TL, the rear brakes were close to new but quite rusted. I pulled the rotor and spray painted the whole thing, front and back. I made some attempts to miss the friction areas, but a few brake slams and riding the handbrake at speed cleaned them right up. Now theres a perfect line and all areas that aren't in contact with pads are coated. It's been a few months and it still looks great.
08-14-2012, 01:31 PM
#32
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eh, my Brembo blanks purchased from an Acura dealer dont look like that, even after 1 year. Granted, they're not completely rust-free but the hub looks fine on the front rotors.
edit: nvm, you are talking of your rears. Mine are the ones that came with the car so not sure what brand they are.
edit: nvm, you are talking of your rears. Mine are the ones that came with the car so not sure what brand they are.
Next time will get better rotors
08-14-2012, 01:31 PM
#33
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08-14-2012, 02:21 PM
#34
I bought aftermarket myself. I have no rust yet been using them for ab three months. I recomend Eline slotted rotors zinc plated ofc.
those are inexpensive and preatty good build quality rotors.
those are inexpensive and preatty good build quality rotors.
Last edited by FarS; 08-14-2012 at 02:26 PM.
08-14-2012, 09:40 PM
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^^^ care to elaborate....
08-16-2012, 01:15 PM
#37
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Some updates here.
Finally got a chance to paint the rear rotor hub and the edge. I was quite a bit lazy and didn't take the rotor off.
Used the black caliper paint with a brush.
Since my rim is not the black typeS rim. The black color looks OK, not quite matching the silver rim color. Should have used the silver one.
Not sure whether I did a good job but at least after a day it looks not bad with brake pads wiping off unnecessary paints on the rotor. Much better than the previous rust looking.
Thanks a lot for everyone's input
Finally got a chance to paint the rear rotor hub and the edge. I was quite a bit lazy and didn't take the rotor off.
Used the black caliper paint with a brush.
Since my rim is not the black typeS rim. The black color looks OK, not quite matching the silver rim color. Should have used the silver one.
Not sure whether I did a good job but at least after a day it looks not bad with brake pads wiping off unnecessary paints on the rotor. Much better than the previous rust looking.
Thanks a lot for everyone's input
08-16-2012, 01:22 PM
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^^^ that came out pretty good 
08-21-2012, 01:08 PM
#39
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I did my front hubs, rear hubs and rear calipers using the G2 caliper painting kit for the same reasons as the OP. It looks very durable and came out really glossy. VHT caliper paint is OK too but doesn't look as durable as the G2 kit (~$37 shipped on ebay).
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