According to the principle of electrochemistry, the protected metal is connected to a metal or alloy with a more negative potential (magnesium alloy sacrificial anode), the protected metal is used as the cathode, and the metal or alloy with a negative potential is used as the anode. The current polarization generated by the connection between the two protects the protected metal, while the negative potential is sacrificed.
The sacrificial anode method is the simplest means of anti-interference corrosion. It has a long application time and does not interfere with nearby facilities.
If the forced current protection method is compared with the sacrificial anode protection method, people are more willing to choose the sacrificial anode method. Today, the sacrificial anode method has developed into a mature commodity technology, with professional anti-corrosion companies, providing various sacrificial anode materials, and contracting various types of sacrificial anode design and construction.