Corrosion at SEC main disconnect lugs and metal

[Mike Lamb]

Would you be concerned about this corrosion at the SEC main disconnect contacts? What kind of metal is this? Aluminum? This is a panel that was mounted in a  basement directly against an outside foundation wall without an appropriate separation.

[Marc]

In the absence of any indication of overheating, I'd not be concerned.

[Jim Katen]

Corrosion like that never gets better, only worse. 

I'd recommend replacing the panel. This time, mount the new panel on standoffs or battens. 

If an electrician were to volunteer to thoroughly clean it up and move it to get it away from the wall, I'd go for that too. But in my area, no electrician is going to want to assume that risk.