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TankGard, the only system of its kind, is able to provide reliable CP for up to 10 years.
The TankGard impressed-current tank cathodic protection system was developed by Deepwater in the mid-1980s specifically to address harsh-environment upstream-process tanks and vessels.
The TankGard impressed-current tank cathodic protection system was developed by Deepwater in the mid-1980s specifically to address harsh-environment upstream-process tanks and vessels. The systems were pioneered in the San Joaquin Valley oilfields of California, where produced water is hot and sour and systems have a high tendency for scaling and sludging. Deepwater installed several prototype systems to evaluate all combinations of anodes and reference electrodes. The result was a reliable, low-cost system that has a proven 10-year design life.
TankGard systems have been used to successfully protect the following: produced water vessels, water tanks, separators, heater treaters, surge tanks, flotation cells, chemelec vessels and potable water tanks, among others.
TankGard is a very well-established product with a long history of success. This proves especially valuable when retrofitting tank cathodic protection in oilfield brines with high H2S and CO2 with temperatures up to 200°F.
The cathodic-protection rectifier is controlled by the potential measurement taken in real time, so the amount of protection is always automatically adjusted to the correct level.
TankGard systems have a ten-year life; many of these vessels can expect less than one year using traditional sacrificial anodes.
At the heart of the system is the innovative FlangeMate anode-mount; this system isolates the impressed-current anode from the vessel within the mount and eliminates spark hazards from insulated flange or Victaulic mounts. The Polatrak® HP-1Z™ and RT-1Z™ reference electrodes, coupled with an IR-free, potentially-controlled power unit, complete the system.
The Polatrak HP-1Z is a permanent-reference electrode designed to allow positive monitoring and control of cathodic protection potentials. This instrument is rated to 3,000 PSI, making it suitable for almost any vessel. The electrode may be wired to a monitoring station or simply read directly at the vessel using a multi-meter.
There is also a floor-mounted anode which, as part of the system, helps to distribute cathodic protection current more effectively.
The self-bleed zinc electrode material used to manufacture the HP-1Z and RT-1Z provides a rugged +/- 20 mV electrode for just about any environment, and the 3,000 PSI pressure-rating is suitable for almost any pressure vessel. It can be inserted through any fitting providing a 1/2" or 3/4" NPT access.