Aluminum alloy sacrificial anode has excellent electrochemical properties, and the power generation of anode material per unit weight is large, about three times that of zinc anode and twice that of magnesium anode. In seawater and other media containing chloride ions, it has good performance and strong self-regulation ability of current. Aluminum alloy sacrificial anode is suitable for cathodic protection of metal corrosion prevention of ships, mechanical equipment, marine engineering and port facilities in seawater media, and pipelines, cables and other facilities in sea mud.
Zinc alloy sacrificial anode has good self-solubility, high current efficiency, and good self-regulation performance of anode current. It is suitable for cathodic protection of metal corrosion prevention of ships, mechanical equipment, marine engineering and port facilities in seawater and freshwater media, and pipelines, cables and other facilities in low resistivity soil. High temperature resistant aluminum alloy anode is to add other metal elements on the basis of aluminum-zinc-indium sacrificial anode, so that the aluminum alloy anode has high temperature resistance in overall performance. In some storage tanks and drainage pipes, due to the high chloride ion content and high temperature, the corrosion of this part is faster.
Although ordinary aluminum alloy anodes can play a role in this environment, the high temperature accelerates the consumption of the anode, making it unable to fully play its role. However, the high temperature accelerates the consumption of the anode, so that the aluminum alloy sacrificial anode is made of high-quality raw materials and finely processed, which can be suitable for various high-temperature environments and can give full play to its own characteristics to provide effective cathodic protection.