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Lapping = Turns ugly? O.o

post #1 of 28
Thread Starter 
About 2 months ago, I lapped my SI-128.
Looked great then, but overtime from installing/uninstalling, it got a few visual scratches (were never deep, and never hurt performance.)

I just lapped my CPU. I put my SI-128, and long story short (you'll know what I mean if you saw how I probably killed my mobo), I had to take off the cooler and put the stock one back on.

But my stock cooler was sitting for a looooooong time, and I noticed on the edges there was brown...stuff. In all honesty it looked like rust...

Well, I put that on, next morning I take off the stock cooler and look at the CPU, and it went from this:


(I know, it isn't the best looking lap ever, but the grid paper test showed it was perfectly flat)

..to this:




It still is pretty flat (you can't feel it -- but I can't check it with grid paper because it's not "shiny" there...the part that is reflective passes the grid test fine, still...

Happen to everyone? Corrosion from being bare copper? How to avoid? Bad? Good? Ok? Normal? Help?
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post #2 of 28
That happened to my evercool as well! It went green :S

I just used some fine sand paper as the issue was only a very thin layer
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post #3 of 28
Thread Starter 
What grit you use?
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post #4 of 28
i cant even remember lol. One sec...

15 micron
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post #5 of 28
The oils from your finger tips oxidizes the copper, since you removed the protective layer of Zinc.
Happened to me when I lapped my BT.
To prevent this, don't touch the lapped IHS with your bare fingers.
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post #6 of 28
Thread Starter 
Quote:
Originally Posted by ckp64 View Post
The oils from your fingers oxidizes the copper.
Happened to me when I lapped my BT.
To prevent this, don't touch IHS after lapping with your bare fingers.
Well...I got bored and took off my VF700 (copper where it touches the core...and it has the same deal going on.) >_<

So, lap with a pretty high grit, and just don't touch the IHS?
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post #7 of 28
Get some latex gloves for when you want to move it.
post #8 of 28
Yep, it's because you touch the surface when there's no protective "film" or the zinc layer on.
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post #9 of 28
hmmmmm



bump
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post #10 of 28
Cotton gloves are good too.
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