There is corrosion on the ibutton ports on our lock. What causes it and how do we prevent this?

Corrosion on ibutton ports is the result of a "salty" or "electrolyte-rich" rain (ex. acid rain) in conjunction with the electrical potential across the ibutton ports.. This combination produces a reaction in which small quantities of the metal may dissolve in the water and appear as a green deposit. No functional issues have  been  discovered. If the locks have been subjected to such an environment, the ports can be treated by washing with distilled water and a small brush.  Follow up by completely drying the area, and applying a light coat of dielectric grease to the port contact surfaces.  The dielectric grease can found  in most automotive parts store.

DISCLAIMER:

INFORMATION PROVIDED THROUGH THIS SITE IS PROVIDED TO YOU AS IS WITHOUT ANY EXPRESS REPRESENTATIONS OR WARRANTIES OF ANY KIND, AND WE MAKE NO REPRESENTATION OR WARRANTY THAT THIS SITE(OR ANY INFORMATION PROVIDED IN RESPONSE TO YOUR INQUIRY), WILL BE ACCURATE, COMPLETE, OR ERROR-FREE.

YOU AGREE THAT YOU MUST EVALUATE ALL INFORMATION AND RESPONSES, AND THAT YOU BEAR ALL RISKS ASSOCIATED WITH, THE USE OF THIS SITE, INCLUDING ANY RELIANCE ON THE ACCURACY,COMPLETENESS, OR USEFULNESS OF ANY INFORMATION OR MATERIALS MADE AVAILABLE THROUGH THIS SITE.