钢结构在海洋大气、工业大气中的腐蚀特点发布时间：2015/9/1 10:05:05 浏览次数:722
Atmospheric environment of the steel structure from the sun, wind, rain and snow, frost and dew, and the function of temperature and humidity change by all the year round, including atmospheric oxygen and water is an important factor of outdoor steel structure corrosion, electrochemical corrosion.
Industrial gases containing SO2, NO2, CI2, H2S, CO2 and NH3, although these ingredient content is very small, but the steel corrosion harm is not to be ignored, which had the greatest influence of SO2, CI2 can make the metal surface passivation film is destroyed. The acidic gases dissolve in water, acid rain formation, corrosion of metal facilities.
The characteristics of the Marine atmosphere is contains a lot of salt, mainly NaCI, salt particles falling on metal surface, due to its moisture absorption and increase the conductive effect of the liquid film and the CI - itself and has a strong corrosive, and thus increase the corrosion of the metal surface. Steel structure near the coast, the corrosion is more serious, its corrosion speed double inland is many times higher than that of the atmosphere.