Weld Type Zinc Anodes For Ships / Marine Vessels / Drill Rigs
They are manufactured for use on fishing boats, cargo ships, trawlers and leisure craft.
Specifications:
|
Elements |
ASTM B418-95 US Mill 18001 K |
|
|
|
Type I (Seawater) |
Type II (soil) |
|
Al % |
0.1-0.5 |
<0.005 % |
|
Cd % |
0.025 – 0.07 |
<0.003 % |
|
Fe % |
<0.005 |
<0.004 % |
|
Pb % |
<0.006 |
<0.003 % |
|
Cu % |
<0.005 |
<0.002 % |
|
Others Each |
<0.02 |
<0.02 % |
|
Other Total |
<0.10 |
<0.10% |
|
Zn |
Remaining |
Balance |
|
Electrochemical Characteristics |
||
|
Capacity |
780 Ahr/Kg |
740 Ahr/Kg |
|
Close Potential(Ag/AgCl) |
-1,1 V |
-1,05 V |
Q. What do sacrificial anodes do?
A.
All metals immersed in an electrolyte (sea water for example) produce an electrical voltage. When two dissimilar metals are in contact (electrically connected) they produce a galvanic cell (like a battery), with the less noble metal (a bronze propeller for example) forming the anode and the more noble metal (stainless steel shaft) forming the cathode.
Aluminum anode alloy provides more protection and lasts longer than zinc. It will continue to work in freshwater and is safe for use in salt water. Aluminum is the only anode that is safe for all applications.
Q. When we we choose to use Zinc anodes ?
A. Exterior of underground or underwater pipe
Interior of pipe handling cor
