2205 double -phase stainless steel is the most widely used double -phase stainless steel in the marine environment. In recent years, the report on marine bacteria corrosion has caused 2205 double -phase stainless steel failure reports that have attracted widespread attention from scholars. 2205-CU, a antibacterial double-phase stainless steel with strong microbial corrosion capabilities, fills the gap in my country in the field of marine antibacterial engineering materials. The research results have important academic significance and practical application value.
Because marine engineering equipment and structural parts are serving in a harsh corrosive environment, its underwater structure has long been eroded by seawater and the effect of microorganisms, so it has put forward higher requirements for its erosion resistance. For stainless steel for marine engineering equipment, chloride corrosion and microbial corrosion in seawater have always been recognized in the world. Therefore, the world's major developed countries have set up national strategic projects to support the research and development of this field, but they have not been very good yet. Solve this problem. The problem of microbial corrosion and biological pollution loss of marine engineering materials causes the country to cause nearly trillions of economic losses each year. At the same time, 30%of the energy waste of the energy of Shanghai navigation objects has become a technical bottleneck that seriously restricts major marine engineering technology and equipment development. First, the problem of material failure caused by it seriously affects the reliability and life of marine engineering equipment. Therefore, the mechanism and protection technology of microbial corrosion failure of marine engineering materials have become a major issue in the field of marine engineering in my country.
Studies have confirmed that the main cause of microbial corrosion of marine metal structures is the generation of metal surface bacterial biofilms. If it can effectively inhibit and kill bacterial biofilms that are adapted on the surface of the metal material, it can effectively relieve or inhibit the occurrence of microorganisms. Therefore, the use of antibacterial stainless steel's antibacterial characteristics and its inhibitory effect on bacterial biofilms, thereby improving the anti -microbial corrosion ability of stainless steel, is a new idea of innovative innovation. The team of the Institute of Metal Research of the Chinese Academy of Sciences used the strong sterilization characteristics of copper ions. As early as the beginning of this century, it has successfully developed a variety of types of copper antibacterial stainless steels such as Austenitic, iron, and martensite. These antibacterial stainless steels are daily. Bacteria, such as E. coli, Golden Gliful, Bacteria, White Candida, and Qi Morococci in life have obvious killing effects. For the bacterial biofilm formed by stainless steel in the marine environment, researchers successfully developed a antibacterial double-phase stainless steel (2205-CU) with resistance to microbial corrosion.
The results show that 2205-CU stainless steel is cultivated for one week after a week after the 2216E culture medium is cultivated with a monolma that caused marine microbial corrosion, and the sterilization rate reached 96.9%. Two weeks after training, the deepest erosion depth caused by microbial corrosion on the surface of ordinary 2205 double-phase stainless steel continues to decrease. In this time, the time interval is pushed to the conclusion ability.
