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The project adopts the combined technology of " impressed current cathodic protection + sacrificial anode auxiliary protection " to ensure the safe service life of drilling rig jacket and attached steel pile structure for more than 30 years in view of the Marine environment of high salt (chloride concentration > 17g/L), high temperature and strong corrosion in the South China Sea. The system design covers the whole platform steel pile, underwater manifold and other key parts. Combined with intelligent monitoring and dynamic regulation, the corrosion rate can be reduced to ≤0.01mm/ year .
The Hong Kong-Zhuhai-Macao Bridge has adopted the joint protection technology of " high-performance coating + sacrificing-anode cathodal protection " to ensure the design life of 120 years for the main structure in the highly corrosive environment of 17.02g/L and 80% humidity in the Lingdingyang Sea area. The technology, led by the Institute of Metal Research of the Chinese Academy of Sciences, covers core parts such as steel pipe piles and concrete structures .
The cathodic protection project of oil tank group in Dongjikou Port of Qingdao is the core supporting project of crude oil commercial reserve project . Covering phases I, II and III, there are 52 floating roof storage tanks of 100,000 cubic meters with a total storage capacity of 5.2 million cubic meters. The combined protection technology of flexible anode + potentiostatic meter + sacrificial anode is adopted. Ensure that the tank bottom and other key parts in the Marine high salt and high humidity environment 30 years or more anti-corrosion life .
Negative potential is applied to the hull through external DC power supply to form cathode polarization and inhibit metal corrosion 15.
Negative potential is applied to the hull through external DC power supply to form cathode polarization and inhibit metal corrosion 15.
The West-East natural gas pipeline project adopts the cathodic protection technology combined with " forced current method + sacrificial anode method ". Aiming at the high corrosion risks (such as soil resistivity difference, DC/AC interference, etc.) of the long distance gas pipeline (the total length of nearly 3900km), it can ensure the safe operation life of for more than 30 years in complex environment. The technology covers the whole pipeline external anti-corrosion layer and cathodic protection system combined protection, and introduces solar power supply system for the no-power area to ensure the stable output of protection current .
