Installation design of anticorrosive magnesium alloy anode in Xinjiang

Installation design of anticorrosive magnesium alloy anode in Xinjiang
According to the different contents of aluminum and zinc, the properties are different
Among them, mg-6al-3zn Mn alloy with good properties and wide application is mainly mg-6al-3zn Mn alloy, with uniform surface dissolution and current efficiency greater than 50% Aluminum is the main alloy element in the anode
It can form mg17 A112 strengthening phase with magnesium to improve the strength of the alloy
However, when aluminum is added to industrial magnesium alone, a large number of intermetallic compounds such as mg Al, mg2a13 and Mg4 A13 can be formed
The existence of these intermetallic compounds will increase the self corrosion rate of magnesium and accelerate the destruction of solid solution
Zinc can reduce the corrosion rate of magnesium, reduce the negative difference effect of magnesium and improve the anode current efficiency
Trace manganese can counteract the adverse effects of impurities iron and nickel

Xinjiang anticorrosive magnesium alloy anode   Installation design
Zinc can reduce the corrosion rate of magnesium, reduce the negative difference effect of magnesium and improve the anode current efficiency
Trace manganese can counteract the adverse effects of impurities iron and nickel
When the addition of manganese is 0
3%, the allowable content of iron can reach 0
02%, but it will also reduce the current efficiency
Therefore, the content of impurity iron and the corresponding manganese content should be as low as possible
The simultaneous existence of aluminum, zinc and manganese can further reduce the requirements for the content of impurity elements in industrial magnesium
In order to obtain good electrochemical properties, the impurity content of Mg AI Zn Mn alloys should be strictly controlled
Under the condition of similar alloy composition, the current efficiency of the alloy with less impurities is significantly higher than that of the alloy with more impurities

Xinjiang anticorrosive magnesium alloy anode   Installation design
Cathodic protection is an anti-corrosion method based on the principle of electrochemical corrosion
The definition of cathodic protection by the American Society of corrosion engineers is to reduce the corrosion rate by applying an external electromotive force to move the corrosion potential of the electrode to the potential with lower oxidation
Sacrificial anode cathodic protection is to connect or weld metals with negative potential on metal structures, such as aluminum, zinc or magnesium
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