Zinc Coated Rotors
#1
Zinc Coated Rotors
I'm in the market for new rotors and I emailed a company regarding zinc coating and if they offer it. They replied that they do not use it because it makes the pads/rotors squeal. I find this hard to believe since reputable brake companies such as Baer zinc coat their rotors. Anyhow, does this squealing business hold any merit or are they trying to get me to buy their rotors?
#2
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brake noises are derived from a variety of sources - most notably, the pad composition.
I've used Zinc coated rotors on my own cars as well as customer cars and have never found them to be any more prone towards noises whatsoever
I've used Zinc coated rotors on my own cars as well as customer cars and have never found them to be any more prone towards noises whatsoever
Last edited by Z1 Performance; 09-25-2010 at 08:03 AM.
#3
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The zinc coating will transfer to the pads, but parts not touched by the pads will remain coated and protected from corrosion. You might try using your old pads with the new rotors long enough to wear the coating away on the contact surface, then install new pads for squeal-free performance.
#4
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The zinc coating will transfer to the pads, but parts not touched by the pads will remain coated and protected from corrosion. You might try using your old pads with the new rotors long enough to wear the coating away on the contact surface, then install new pads for squeal-free performance.
#7
I'm in the market for new rotors and I emailed a company regarding zinc coating and if they offer it. They replied that they do not use it because it makes the pads/rotors squeal. I find this hard to believe since reputable brake companies such as Baer zinc coat their rotors. Anyhow, does this squealing business hold any merit or are they trying to get me to buy their rotors?
By the way, these are brakes -- the most important safety feature on any vehicle. Don't trust them to just any company with a web site and a machine to drill/slot rotors! Go with a company with lots of experience so you can rest assured you can count on your brakes when you need them.
Chris
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#11
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The Zinc coated rotors are just a way to add more money to the cost of a product. a Z1 has said, Ive also used zinc coated rotors and depending where you live, do the same thing as non-coated ones.
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#12
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If you search around you'll see his involvement in a lot of enthusiast forums, just sharing his knowledge and offering advice, he is not a salesperson, just an enthusiast like yourself and happy to help. If he references a product like he did, it's because he can speak in certains, as he oversees the manufacturing of it.
#13
Chris
#14
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Dude when i first read this, i thought i made this thread lol. I asked 88rotors about zinc paint and they said they don't do zinc paint on there rotors because they cause squealing noise.
@Chris_B Do you think that 88 rotors have decent rotors? they quoted me $60 for rear pair rotors drilled and slotted.
@Chris_B Do you think that 88 rotors have decent rotors? they quoted me $60 for rear pair rotors drilled and slotted.
#17
No. I bought the rears from Z1 and they were noticeably a different shade of gold. I also figured I could use the money elsewhere since brake performance wasn't that high on my list of priorities. Sold the rotors and bought coilovers
Now my pads are running thin so I bought StopTechs and figured I will change the rotors while I'm in there.
Now my pads are running thin so I bought StopTechs and figured I will change the rotors while I'm in there.
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I'm in the market for new rotors and I emailed a company regarding zinc coating and if they offer it. They replied that they do not use it because it makes the pads/rotors squeal. I find this hard to believe since reputable brake companies such as Baer zinc coat their rotors. Anyhow, does this squealing business hold any merit or are they trying to get me to buy their rotors?
from what I was told certain manufacturers won't zinc coat the actual braking surface because of mentioned issues. Not only that but because the coating itself will wear off rather quickly because of the pads... However the rest of the rotor is zinc coated, or might be, to prevent rust. Any area the brake pads do not touch are coated. They explained that any ebay items or other offering fully zinc coated are kind of misleading because that actual coat will wear off with use in normally a short period of time
I'm no genius when it comes to rotors but it doesn't seem logical, sensible, what have you. And unless the cars sitting all Summer like my Sebring has any rust buildup that you might get from it sitting for a short period of time can be brushed off and worn off once you take the car out and make several stops.
#19
Dude when i first read this, i thought i made this thread lol. I asked 88rotors about zinc paint and they said they don't do zinc paint on there rotors because they cause squealing noise.
@Chris_B Do you think that 88 rotors have decent rotors? they quoted me $60 for rear pair rotors drilled and slotted.
@Chris_B Do you think that 88 rotors have decent rotors? they quoted me $60 for rear pair rotors drilled and slotted.
- Which grade of iron are the castings made from and where are they made?
- Are they vertically molded (Disematic split-mold process) or horizontally sand cast?
- Are they heat treated and how?
- Are they balanced and how so?
- What sort of quality control steps are in place to catch porous castings?
- How is hardness and carbon content checked?
- What type of machining is done and where is it done? Radius chamfer for cross-drilled holes, ramped-out saw-cut slots? Are the holes peened to reduce the onset of cracks?
- How is the drill and/or slot pattern laid out and why?
- How are the rotors prepped before plating?
- Which type of plating is used (zinc dichromate using trivalent or hexavalent chromium)?
- How long has the company been selling rotors? Been in business?
- What is the warranty policy?
- What is the return policy?
- Can I speak with one of the qualified, degreed and state-licensed automotive engineers on staff to get my answers?
Chris
#20
I just inquired about zinc coating to a manufacturer too. though my reply was a bit different...
from what I was told certain manufacturers won't zinc coat the actual braking surface because of mentioned issues. Not only that but because the coating itself will wear off rather quickly because of the pads... However the rest of the rotor is zinc coated, or might be, to prevent rust. Any area the brake pads do not touch are coated. They explained that any ebay items or other offering fully zinc coated are kind of misleading because that actual coat will wear off with use in normally a short period of time
I'm no genius when it comes to rotors but it doesn't seem logical, sensible, what have you. And unless the cars sitting all Summer like my Sebring has any rust buildup that you might get from it sitting for a short period of time can be brushed off and worn off once you take the car out and make several stops.
from what I was told certain manufacturers won't zinc coat the actual braking surface because of mentioned issues. Not only that but because the coating itself will wear off rather quickly because of the pads... However the rest of the rotor is zinc coated, or might be, to prevent rust. Any area the brake pads do not touch are coated. They explained that any ebay items or other offering fully zinc coated are kind of misleading because that actual coat will wear off with use in normally a short period of time
I'm no genius when it comes to rotors but it doesn't seem logical, sensible, what have you. And unless the cars sitting all Summer like my Sebring has any rust buildup that you might get from it sitting for a short period of time can be brushed off and worn off once you take the car out and make several stops.
It is always best practice to drive around the neighborhood after washing the car to dry off the brakes. This helps reduce corrosion and prevents pads with high metallic contents from seizing on the rotors. If you live where is is often wet (Pacific Northwest) or around salt air (Hawaii), you just might be replacing rotors a little more often -- unless you upgrade to carbon-ceramics!
Chris