Dunno what part of the country your in. I would be concerned with any metal close to the bare concrete blocks. They can cause problems with temperature swings.
Buddy had some problems and he put up styrofoam blue board and problem solved. I have gotten in the habit of putting it up when ever I put anything permanently up against a basement wall
This is the basement of a 1950's house in Denver, Colorado. I haven't seen any problems between the concrete blocks and proximate metal, and some of that stuff has been there for going on 70 years. Maybe not enough of a temperature swing in the basement to be a problem?












