V1.62 Galvanic Cathodic Protection For Corrosion Magnesium Mg Negative Potential
High Purity Magnesium Anode Cathodic Protection Affordable Corrosion Protection
Introduction:
Because magnesium alloys have high chemical activity, strong self-corrosion, and no dense protective film will be formed on the surface, the current efficiency of magnesium anodes is much lower than that of aluminum and zinc anodes, usually around 50%. The outstanding advantages of magnesium anode materials lie in low density, large theoretical capacitance, negative potential, low polarizability, and high driving voltage (>0.6 V) for steel.
In order to adapt to various environments and for different protection objects, magnesium anodes can be made into various shapes, such as casting anodes with D-shaped and trapezoidal cross-sections commonly used in soil and water, and extruded anodes in heat exchangers. Cylindrical anodes, ribbon anodes are often used in high resistivity soils or in casings, hemispherical anodes are commonly used underwater, and composite anodes are ideal in low resistivity environments.
Parameters:
Our products have the following specifications:
- " D " anode
- " R " Cylindrical anode
- " S " anode
Chemical composition %
| Alloy | Al (max) | Mn | Si (max) | Cu (max) | Ni (max) | Fe (max) | Other impurity (each) | Total impurities |
| (max) | (max) | |||||||
| Mg- Mn | 0.01 | 0.50-1.30 | 0.05 | 0.005 | 0.001 | 0.03 | 0.05 | 0.3 |
The electrochemical performance
| Open voltage | Closed voltage | Actual capacity | Efficiency |
| 1.70-1.75 | 1.58-1.62 | 1230 min | 50 min |
Features:
Magnesium alloy sacrificial anode features: good protection performance, easy installation, automatic operation after installation, no maintenance, no external current, low engineering cost, easy replacement, etc. Magnesium alloy anode is an ideal cathodic protection method.
Applications:
Cathodic protection is often used to mitigate corrosion damage to active metal surfaces. It is used worldwide to protect pipelines, water treatment plants, above and submerged storage tanks, ships and hulls, offshore production platforms, concrete structures and rebar in docks, among others.
Photos:
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