Aluminum alloy sacrificial anodes have excellent electrochemical properties, and the power generation per unit weight of anode materials is large, about three times that of zinc anodes and twice that of magnesium anodes. In seawater and other media containing chloride ions, it has good performance and strong self-regulation ability of current generation. Aluminum alloy sacrificial anodes are suitable for cathodic protection of metal corrosion in ships, mechanical equipment, marine engineering and port facilities in seawater media, as well as pipelines, cables and other facilities in sea mud.
Zinc alloy sacrificial anodes have good self-solubility, high current efficiency, and good self-regulation performance of anode current generation. It is suitable for cathodic protection of metal corrosion in ships, mechanical equipment, marine engineering and port facilities in seawater and freshwater media, as well as pipelines, cables and other facilities in low resistivity soil. High temperature resistant aluminum alloy anodes are made by adding other metal elements to the aluminum-zinc-indium sacrificial anodes, which makes the aluminum alloy anodes have 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.