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Old 06-15-09, 12:24 AM   #1
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Rusted screws and components

So I recently acquired a Raleigh Super Course Mk. II which i plan on using for commuting to school. Sorry, i realize pictures would be much appreciated but I currently I'm at home and being the bonehead that I am I left my pictures and what not with my bike at school.
Anywho, there are a few rusted screws and there shows signs of rust on the front derailleur which i want to take off and clean up. There are also a few small dots of rust on the back of the frame that I am partially worried may have spidered under the paint. The rusted screws are my main problem since I can't get them off, and they seem frozen (I'm not 100% sure I'm using this term correctly).
My question is, what do you all suggest for getting these screws un-frozen? i looked around and it seems some WD-40 and a little patience will get them loosened up? Also, I plan on giving my bike an oxalic acid bath, which seems like the way to go based on my forum readings, but for the next few weeks I don't think that i'll have the time to let it soak for a day. So is there anything that I can do to keep the rust from spreading in the mean time? Thanks in advance for any advice you can offer!
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Old 06-15-09, 01:29 AM   #2
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What you want is a penetrating lube. WD is pretty weak stuff in this case. Something like PB works much better at loosening rusted and frozen parts than WD. I know ACE stores can get it and most auto stores usually carry it.

PB and most other penetrating lubes work even better if you spray for a day or two before you try to remove the offending screw, giving it extra time to penetrate.

WD stands for "water displacement" and it was the 40th try to get it right. So while its great for spraying on bare metal to keep it from rusting, it's not ideal for most penetrating or lubricating tasks. Clean your garden tools and coat them with WD when your done using them, or wipe a light coating on bare steel bike parts to keep the rust away. If the rust is already under the paint WD won't stop it.

If the screws are philips head make sure you have the apprpopriate sized driver, you could strip it trying to use the wrong one (even with the right one there are no guarentees.)

Good luck!
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Old 06-15-09, 03:08 AM   #3
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Yep - get the PB and let it soak in. Then use a fine paper like Emory Cloth. Rust is just a surface oxidation and can be easily removed. Once it's gone, put a good oil on the surface and that should help prevent further oxidation (rust). Don't go overboard - rust is a very thin layer and comes off easily.
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