Join Date: Apr 2012
Location: Raleigh, NC
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Re: Corrosion probs w/aa, aaa, 18650, etc batt chargers
Dremel with Grinding wheel is over kill, and will damage the contact if done incorrectly.
The key to corrosion removal is to use the least abrasive method possible.
The method I have used for decades is remove all crud with a basic solution, baking soda and water works, I use an acid brush and long q-tip applicators to gently remove the crud, rinse with Distilled Dionized water if you have it, if not skip, flush with a solvent to remove water and any remaining residue in the battery compartment.
Let dry, lp air can assist in this, Really make sure it is dry While most solvents will falsh off quickly and Distilled Deionized water is non conductive, the corrosive salts are not and if you did not remove all of it your in for quite a surprise when the equipment is energized, i.e. as we like to say "let out the magic smoke" or could be shocking to you personally.
If the contacts are still a bit dark or show signs of discoloration using a ruby red eraser by hand will clean them up, again remove all the erasure debris. Yep them old things on the end of wooden pencils and larger ones found at office supply locations. Cleans but leaves very little to no residue on the contacts, Clean up the red stuff, as needed, I tend to do this with the contacts facing down so gravity cleans up for me when possible.
Finally use a corrosion inhibitor suitable for electrical contacts, i.e. dielectric grease or CPC, this helps prevent corrosion from starting, but does not prevent it if ignored. In other words you need to check the contacts if they are subject to salt air, duh they are, and reapply dielectric grease or CPC on a regular basis, how regular depends on how often it is exposed and for battery charger how often it is used and the grease or CPC is wiped away.
Remember corrosion never sleeps as I was taught so diligence is your main tool.
Is this method a pain you betcha, but IMHO it is the least abrasive to your contact, NAVAIR seemed to think so too as this is how it was taught "back in the day." Best way to avoid this treat the contacts before you first use them with dielectric grease or other electrical approved CPC, (Corrosion Preventive Compound) there are several out there and relatively cheap compared to the alternative i.e. replacing the hole thing due to severe corrosion. An ounce of prevention is definitely better than a pound of cure with corrosion.
Sorry for the length. Also ensure you have removed the item you want to clean from all power sources, I hope this goes without sayin but there are too many people out there trying to win a Darwin award.
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Last edited by CVAT; 4 Weeks Ago at 05:19 AM.
Reason: spelling and style