Corrosion prevention refers to the use of various means to protect metal items that are prone to corrosion, in order to extend their service life. Usually, methods such as chemical corrosion prevention, physical corrosion prevention, and electrochemical corrosion prevention are used. The occurrence of chemical, electrochemical, or physical interactions between metals and the environmental medium in which they are located, leading to the deterioration and deterioration of metals, is called metal corrosion, and corrosion is a very common phenomenon. From a thermodynamic perspective, except for a few precious metals (Au, Pt, etc.), corrosion of general metals is a spontaneous process. People have realized that the use of metals is rarely caused by pure mechanical factors (such as tension, pressure, impact, fatigue, fracture, and wear) or other physical factors (such as thermal energy, light energy, etc.), and the vast majority of metal material damage is related to its corrosion factors. Therefore, the corrosion of metal materials has become an important issue that cannot be ignored today. In addition, the direct losses caused by metal corrosion to human society are enormous. Around the 1970s, many industrialized countries conducted systematic corrosion investigations and published investigation reports. The results show that corrosion accounts for 1% to 5% of the national GNP. This survey is a concern of governments around the world about the harm of corrosion and has played an important role in promoting the development of corrosion science. In the following 30 years, people carried out metal protection work to varying degrees. At different times in the future, various countries have conducted varying degrees of investigation work, and the losses during different periods are also different. According to records, the corrosion loss in the United States in 1975 was $82 billion, accounting for 4.9% of the total national economic output value; In 1995, it was $300 billion, accounting for 4.21% of the total national economic output value. These data are only direct loss data related to corrosion, and indirect loss data is sometimes difficult to calculate, even a staggering number. The metal corrosion situation in China is also very serious, especially compared to developed industrial countries, there is still a gap in the protection of metal corrosion in China. According to the analysis in the "China Corrosion Investigation Report" published in 2003, the metal corrosion losses of China's petroleum industry are about 10 billion yuan per year, the metal corrosion losses of the automotive industry are about 30 billion yuan, and the metal corrosion losses of the chemical industry are also about 30 billion yuan, all of which belong to direct losses. For example, the report investigated the case of acid corrosion, embrittlement and explosion of a boiler in a thermal power plant, and the cumulative loss was about 1.5 billion kilowatt hours, equivalent to 300 million yuan, while the indirect loss caused by the lack of power supply has not been included. So, the loss of metal corrosion is very serious and must be given high attention