Spent anode that was never replaced by manufacturer.
This tank was relined and the anodes were replaced.
Magnesium sacrificial anodes are welded in place by properly trained
PTL staff. They are usually placed in tanks that are being relined
as part of our lining system but they can also be installed into
older tanks that are corroding around couplings, inlets, etc.
One
of PTL's specialties is lining these smaller storage vessels with
Alkrete
Key Benefits
Magnesium
is more reactive than Zinc
Easily
replaced - less than 1 hour in most cases
Threaded
insert anodes are also available from PTL, when the tank already
has an available coupling
Replacement
every 1-3 years allows flexibility when implementing your preventative
maintenance program
Coatings Inc. 
More Anodes
Magnesium sacrificial anodes are welded in place by properly trained
PTL staff. They are usually placed in tanks that are being relined
as part of our lining system but they can also be installed into
older tanks that are corroding around couplings, inlets, etc.