ASTM Sacrificial Magnesium Anode for Vessel / Marine / Ships / Drill Rigs
ASTM G-97 Magnesium Anode
Product Introduction:
Magnesium anodes are used in such systems, most commonly to protect underground gas, oil and water pipelines.
Magnesium anodes come in two alloys. H-1 or AZ-63 is 90% magnesium, 6% aluminum and 3% zinc. The zinc and aluminum lowers the cost of the anode but it also lowers the driving potential to about -1.55 volts referenced to a copper sulfate electrode. It will perform well in corrosive soil if the tank is well coated and will last longer than the high potential alloy. The other alloy is 99% pure magnesium. It is called a "high potential" anode as its open circuit potential is as high as -1.80 volts. It works better than the H-1 alloy anode in dry or resistant earth or where more current is needed because of a poorly coated tank. The higher potential forces more current to flow than would from an H-1 alloy anode. It costs more per pound but in many cases it is worth the extra cost.
Specifications:
High Potential (HP) Cast Magnesium anode is the best choice for CP systems in high resistivity soil since it is made from the high purity magnesium which provides higher electrochemical and efficiency.
Chemical composition of HP Mg anode, %
|
Alloy |
Al |
Mn |
Si |
Cu |
Ni |
Fe |
Other impurity(each) (max) |
Total Impurities (max) |
|
Mg-Mn |
0.01 |
0.50-1.30 |
0.05 |
0.005 |
0.001 |
0.01 |
0.05 |
0.30 |
Electrochemical properties of HP Mg anode
|
Open voltage(-V) |
Closed voltage(-V) |
Actual capacity(A.h/kg) |
Efficiency (%) |
|
1.70-1.75 |
1.58-1.62 |
1,150 |
50 min |
Company Brief Introduction:
We are a professional anode supplier over 16 years ,mainly supply:
* Zinc anodes (ASTM B418-95 US MILL 18001K)
* Al-Zn-In anodes (GAIII)
* Magnesium anodes ( ASTM-G97)
* High silicon cast iron anodes ( ASTM-A518-3,BS1591)
Our anodes are shipped worldwide especial main to North America, Asia etc., around 5000mt per year. Our goods are regularly tested by independent third party lab in USA to keep anode continuous high quality. Our plant owns raw material resources ore, so we can supply very good price with service for you.
We can also accept customized anodes with your logo according to your drawing !
Office, Workshop, Inspection Lab:
Company Principle:
Our Belief: Continuous Innovation.
Our Spirit: Sincerity, Unity, Dedicated, Hardworking.
Our Mission: Provide most advanced products & most professional technical solution.
