Directional removal of chimney and painting of chimney ring

Directional removal of chimney and painting of chimney ringThe chemical, electrochemical, or physical interactions between metals and the environmental media in which Hongshun Construction Engineering Co., Ltd. operates can cause the deterioration and deterioration of metals, known as metal corrosion. Corrosion is a very common phenomenon. From a thermodynamic perspective, except for a few precious metals such as Au and Pt, corrosion of metals is generally a spontaneous process. People have realized that the use of metals is rarely caused by simple mechanical factors (such as tension, compression, impact, fatigue, fracture, and wear) or other physical factors (such as thermal energy, light energy, etc.), and the vast majority of metal material failures are related to their 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 developed industries conducted systematic corrosion investigations and published investigation reports. The results show that corrosion accounts for 1% to 5% of the national GNP.
This survey has drawn attention from various countries to the hazards 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 conducted varying degrees of investigation work, and the losses during different periods were also different. According to records, the corrosion losses in the United States in 1975 amounted to 82 billion US dollars, accounting for 4.9% of the total national economic output; In 1995, it was 300 billion US dollars, accounting for 4.21% of the total national economic output. 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 our country is also very serious, especially the protection of metal corrosion in our country still has a long way to go compared to developed industries. According to the "China Corrosion Investigation Report" published in 2003, the metal corrosion losses in China's petroleum industry are about 10 billion yuan per year.

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The metal corrosion losses in the automotive industry are about 30 billion, and the metal corrosion losses in the chemical industry are also about 30 billion, both of which are 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 caused by metal corrosion is very serious and must be highly valued. Take appropriate measures to prevent metal corrosion, such as manufacturing various corrosion-resistant alloys, such as adding chromium, nickel, etc. to ordinary steel to make stainless steel. Cover the metal surface with a protective layer to isolate the metal product from the surrounding corrosive medium and prevent corrosion. Coat the surface of steel components with engine oil, Vaseline, paint, or cover them with corrosion-resistant non-metallic materials such as enamel and plastic. By using methods such as electroplating, hot-dip coating, and spray coating, a layer of non corrosive metals such as zinc, tin, chromium, nickel, etc. is deposited on the surface of steel.

Directional removal of chimney and painting of chimney ring