New brake disc discolouration

[Mrtrana]

Hi everyone. I recently fit new Brembo disc and pads to my fiesta mk7 ecoboost. I have followed the bedding in procedure as instructed from Brembo. I have done around 200miles and have just noticed this dark patch on my disc in the shape of the pad.  I wasnt sure if this was due to overheating. In the picture you can see a dark line on top which was oily. I have cleaned that off with brake cleaner and am left with just the dark patch. Does anyone know what this could be due to.

 

 

[Neb_engineer]

This looks like you didn't bed the brakes in properly, while bedding the brakes in you should never come to a complete stop when doing the procedure otherwise you leave a lot of pad material in one place and are left with exactly what u have

[unofix]

In another 1500 miles the whole disc will be that darker colour so nothing to worry its just what steel does

[Neb_engineer]

5 hours ago, unofix said:

In another 1500 miles the whole disc will be that darker colour so nothing to worry its just what steel does

not really, when was the last time you looked at your brakes? usually brake discs are one of two colours, rust brown of shiny silver (or somewhere inbetween) especially in england, the disc wouldn't get darker as when you brake, its the friction of the pad against the rotor that slows you down, however that same friction also removes material from both the pads and the disc exposing new material

[Mrtrana]

10 hours ago, Neb_engineer said:

This looks like you didn't bed the brakes in properly, while bedding the brakes in you should never come to a complete stop when doing the procedure otherwise you leave a lot of pad material in one place and are left with exactly what u have

That makes sense. I've never done the bedding process before so it was new to me. Im hoping I can get a few years out of these. Don't want to replace them too soon. Thanks for the advice.