Christmas Light Corrosion: Smart Fixes for Contact Failure

Summary for christmas light corrosion Discussion

Corrosion of indoor/outdoor Christmas lights is the question here: John Baum asks whether the rusting he sees on socket contacts in Christmas tree light sets is the same galvanic action that attacks galvanized iron when joined to copper and brass plumbing parts, and whether the contacts should all be copper to avoid early failure. In the excerpt, no detailed technical answer is shown, but the concern is clearly about whether mixed metals in the light sockets are creating a galvanic cell. The thread also notes a suggestion of "No-Ox-Id" compound, implying that contact protection may be part of the solution. Based on the question alone, the practical issue is preventing corrosion at the electrical contacts rather than simply choosing a single metal. Any definitive recommendation about materials would need the missing answer text, so the safest reading is that the problem may involve galvanic corrosion or contact oxidation in a damp environment.