CHEMICAL COMPOSITION
Our anode is made from special high grade (SHG) zinc ingots with 99.995% purity. The high-purity composition ensures the anode material is more resistant to passive films. Type I is generally used in seawater or brackish water, while Type II is used in underground and fresh water.
◉ ASTM – B418 Type I
Element |
Content (%) |
Aluminum (Al) |
0.100 ~ 0.500 |
Lead (Pb) |
0.006 max. |
Iron (Fe) |
0.005 max. |
Copper (Cu) |
0.005 max. |
Cadmium (Cd) |
0.025 ~ 0.070 |
Other Impurities |
0.100 max. |
Zinc (Zn) |
Remainder |
◉ ASTM – B418 Type II
Element |
Content (%) |
Aluminum (Al) |
0.005 max. |
Lead (Pb) |
0.003 max. |
Iron (Fe) |
0.0014 max. |
Copper (Cu) |
0.002 max. |
Cadmium (Cd) |
0.003 max. |
Other Impurities |
0.100 max. |
Zinc (Zn) |
Remainder |
ELECTROCHEMICAL PROPERTIES
Our zinc ribbon anode is designed for challenging colder weather(-22ºF/ -30ºC) environments, such as thawed zones
in permafrost.
◉ ASTM – B418 Type I
Technical Measurement |
Performance |
Open Circuit Voltage (min.) |
-1.05 Volts |
Closed Circuit Voltage (min.) |
-1.00 Volts |
Current Capacity |
780 A.h/kg (354 A.h/lbs) |
Current Efficiency (min.) |
95% |
Consumption Rate |
11.2 kg/A.y(24.8 lbs/A.y) |
◉ ASTM – B418 Type II
Technical Measurement |
Performance |
Open Circuit Voltage (min.) |
-1.10 Volts |
Closed Circuit Voltage (min.) |
-1.05 Volts |
Current Capacity |
740 A.h/kg(335 A.h/lbs) |
Current Efficiency (min.) |
90% |
Consumption Rate |
11.9 kg/A.y(26.2 lbs/A.y) |
* The open/closed circuit voltage is with respect to a saturated calomel electrode.