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Scratched PowerBook
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Junior Member
Join Date: Feb 2004
Status:
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I recently put a nice, deep scratch on my 12" Al PowerBook G4.  It is fairly visible in most lighting angles. I was wondering if I might have stripped the anodized coating off the aluminum, and also, if I did in fact strip off the coating, would I have have made that spot on the aluminum case susceptible to corrosion?
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Fresh-Faced Recruit
Join Date: May 2004
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Oh dear, how did that happen? I thought it was part of Apple's advertising that PBs were scratch-resistant (not "proof" I suppose). I hesitate to ask to you to post a pic, since you must be pretty pissed off right now!
Since the entire machine's shell is made of anodised aluminium and it isnt electro plated, I would assume that would make the entire casing corrosion resistant, whether or not it is scratched.
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Junior Member
Join Date: Feb 2004
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I was just curious, but at least it's on the underside of the machine, so i don't see it too often. The aluminum thankfully, it's dented. What happened was that I placed my PB on a plug, then upon realizing that it was sitting on the plug, I pulled it out from under the PB really quickly, and the metal edge of the connector must have scratched it.
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Grizzled Veteran
Join Date: Mar 2001
Location: London, UK
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Yeah, they're not scratch proof. More so than the Titaniums were, though. My 12" has a scratch on the bottom and a quite bad scuff on the top.
Works fine, though 
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Mac Elite
Join Date: May 2004
Location: on 650 cc's
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I'd be 
I'm still pissed at myself for making the one and only pixel-size dent next to the trackpad 
Sorry to hear what happened to yours ...
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stuffing feathers up your b*tt doesn't make you a chicken.
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Mac Elite
Join Date: Jun 2004
Location: Westside Island
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I have a couple of tiny scratches and dents on my PB now. I don't mind so much any more. Think of them as beauty marks!
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Mac Enthusiast
Join Date: Aug 2003
Location: Mil Wau Kee
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Sorry about the scratch....
If I remeber correcly from my material science class, Al does not corrode that easy. Well when the Al is exposed to the air the oxygen content of the air reacts with the AL to form AlO2 (aluminum oxide) and this AlO2 creates a coat that is corrosion resistance and will not let the rest of the Al corrode.
So I think you are safe! Hmmm...finaly something quite usefull out of that class!
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Fresh-Faced Recruit
Join Date: Jul 2004
Status:
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Originally posted by johnzoidberg:
I recently put a nice, deep scratch on my 12" Al PowerBook G4. It is fairly visible in most lighting angles. I was wondering if I might have stripped the anodized coating off the aluminum, and also, if I did in fact strip off the coating, would I have have made that spot on the aluminum case susceptible to corrosion?
About scratches and corrosion:
I live in Singapore and own a Rev A 12-inch Powerbook. Have been using it extensively for work for about a year and a half. It gets so hot in the palm rest area that my palms tend to sweat, and now the palm rest area is corroded, with black dots (like little bubbles) appearing. Initially thought it was dirt, and discovered with a magnifying glass that it wasn't.
There're some minor scratches on the casing itself, but they're nothing compared to Tibooks. These scratches are on the outer portion of the PB, whereas the corroded areas are on the palm rests.
But I think corrrosion is rare. I've only read about one other person having this problem.
Hope this gives you an idea.
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