CATHODE
PROTECTION
- reverses the electric current that causes corrosion and
comes in 2 forms :
- Sacrificial anodes can be attached to the storage tank
system.
Anodes are pieces of metal that are more electrically active
than the
steel storage system. Thus, the storage system becomes the
cathode (+
charge) portion of the resulting battery and the attached
metal bits
become anodes (- charge). The anodes corrode, sparing the
tank system
from corrosion.
- An impressed current system introduces an electric
current into the
ground through a series of anodes that are not attached to
the UST.
Because the current flowing from these anodes to the tank
system is
greater than the corrosive current attempting to flow from
the UST, the
corrosive current is inhibited and the storage system is
protected.
DIKE
- is a barrier constructed to contain, divert or direct a
liquid flow until
clean-up is possible
PAD
- should be constructed from an impermeable uncracked
material, such as concrete, asphalt or clay. It should
include curbs to contain spills and be sloped towards a
sump to facilitate spill collection.