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Building on the previous background regarding sacrificial anode protection for pipelines and storage tanks, the main advanced sacrificial anode protection systems in use today include the following categories: Intelligent monitoring sacrificial anode systems. These systems incorporate intelligent test piles, high-precision potential sensors, and wireless transmission modules, enabling 24/7 remote monitoring of key parameters such as protection potential and anode output current. They can trigger alerts automatically in case of abnormalities, replacing the need for traditional manual inspections and thereby reducing operational costs significantly. Such systems are already widely used in coastal gas pipelines and long-distance oil and gas pipelines. The high-capacity special alloy sacrificial anode system uses a low-impurity, high-purity zinc/aluminum-indium-cadmium alloy formulation, achieving a current efficiency of over 90%. Its capacitance per unit weight is 30% higher than that of conventional anodes, and it maintains uniform dissolution even in extreme environments such as deep-sea high pressures and high salt spray conditions, thereby preventing localized passivation failure. The sacrificial anode system with current-limiting control features a customized current-limiting resistor connected in series within the anode circuit; it enables the output current to be adjusted dynamically based on the rate of coating damage of the structure being protected. This prevents rapid consumption of current at the beginning of operation, ensuring a steady current output throughout the entire service life of the system, which can extend its overall lifespan by more than 20%. The flexible strip-type sacrificial anode system uses magnesium/zinc alloy strips as its core, along with a specialized conductive coating; it can be directly wrapped around complex areas such as the irregular welds of pipes and storage tanks, as well as flanges. This design ensures a more even distribution of current, addressing the issues of current shielding and insufficient local protection associated with traditional block-type anodes. For metal corrosion protection in marine environments, such as on ships, the inner walls of storage tanks, submarine pipelines, and dock pilings, specialized cathodic protection products offer high-performance sacrificial anode materials that ensure long-term and stable corrosion prevention.