Factors that make steel susceptible to corrosion

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Factors that make steel susceptible to corrosion

Release time：

2023-02-15

　　We all know that steel is most afraid of rust and corrosion, there are many important building materials in our life, but also steel is more, if not properly maintained on a daily basis, it is very easy to make its corrosion.

　　1, industrial gases containing SO2, CO2, NO2, CI2, H2S and NH3, etc., although the content of these ingredients is very small, but the corrosion of Yantai steel is not negligible, which has the greatest impact on SO2, it can make the metal surface passivation film is destroyed. These gases dissolved in water is acidic, the formation of acid rain, corrosion of metal facilities.

　　2, the atmospheric environment of the steel structure by the sun, sand, rain, snow, frost and dew and temperature and humidity changes throughout the year, of which, the oxygen and moisture in the atmosphere, is an important factor in causing outdoor corrosion of Yantai steel.

　　3, the characteristics of the marine atmosphere contains a large number of salt, mainly NaCI, salt particles settled on the metal surface, due to its moisture absorption and increase the conductivity of the liquid film on the surface, while the CI ion itself has a very strong aggressive, thus increasing the corrosion of the metal surface. The closer to the coast, Yantai steel corrosion is also more serious, the corrosion rate is many times higher than inland atmosphere.

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