That's corrosion, not galvanic erosion. The pickup tube is bonded to the tank by it's pipe connection. Chemicals, decay, water and/or more...
Ruby We were fogged in last week, near freezing weekend (think you were warmer) and back in the 80s & clear today. It's not over yet, not...
I'm looking forward to the OP's final plan. Lots of ideas offered but I think the epoxy idea has been explained pretty well from a few different...
