Sea mud/ seawater biofuel cell system for protecting metallic corrosion cathode

Abstract

The invention provides a connection mode of a sea mud/ seawater biofuel cell system for protecting sea metallic corrosion cathode. By the technology, people can utilize electric energy provided by the sea mud/ seawater biofuel cell to provide corrosion protection for metallic structure and reinforced concrete structure in seawater or sea mud under the condition of deep open sea. The sea mud/ seawater cell can constantly and stably provide electric energy for a long term, inhibits or alleviates metal corrosion, lowers electric energy cost, improves service life, can solve the problems of difficult power supply, small possibility of continuing long-term effect, high maintenance cost and the like existing in the cathode protection technology of ocean submerged metal structure. The technology of the invention can be applied to corrosion protection of various ocean engineering structures, such as underwater construction, oil platform, bay dock, municipal facilities and the like.

Description

Technical field The invention belongs to the field of marine corrosion and protection. Specifically, the invention relates to an external DC power supply and system connection design for metal marine corrosion cathodic protection. Background technique Marine corrosion has caused huge losses to people, and the development of new technologies for marine corrosion protection has always been a major demand for human beings. At present, people have developed a variety of metal anti-corrosion technologies such as sacrificial anode cathodic protection technology and impressed current cathodic protection technology. Impressed current method cathodic protection system has three important components: DC power supply, auxiliary anode, protected metal and structure. The key is to use external DC power supply to provide cathodic protection current for the protected metal. Current, long-term continuous power supply, and the output current can be adjusted on demand. Therefore, the DC pow...

AI Technical Summary

Problems solved by technology

In the deep sea, there is no stable supply of municipal public power supply, and the battery is difficult to supply power for a long time due to its limited capacity, and long-distance cable power supply is difficult to achieve. The generator also needs fuel and supporting mechanical devices, etc.

In 2006, a method [2] of a solar power supply device for metal cathodic protection was disclosed in China. Using solar energy, the power generation can be designed according to demand. It is characterized by green, environmental protection, and controllable power generation. The energy of the power supply device is unstable. When there is sufficient sunshine, there is electric energy. When there is insufficient sunshine, there is no electric energy. It is difficult to be continuously effective, which will affect the effect of cathodic protection.

At the same time, during the operation of the impressed current cathodic protection system, the long-term consumption of electric energy leads to high cost of the cathodic protection system, and people have been trying to reduce the cost of this electric energy

The maintenance of the cathodic protection system in the deep sea is very difficult. In order to maintain the normal operation of the protection system, people also need to invest a lot of cost in the maintenance and testing of the external power supply.

Therefore, the long-term continuous supply of power supply for impressed current cathodic protection of marine metal corrosion has always been very difficult, especially for the impressed current cathodic protection of some metal components in deep sea water, the power supply is a huge challenge for people

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