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Influencing factors of atmospheric corrosion of bridge steel structures
The atmospheric corrosion of anti-corrosion coatings for bridge steel structures is mainly caused by the moisture, oxygen and corrosion contained in the atmosphere
The sexual medium includes the damage caused by the combined action of impurities, smoke and dust in rainwater and surface sediments.
Meteorological factors
Climate factors in the atmosphere directly affect the corrosion of the coating? Including sunshine time, temperature
Relative humidity, rainfall and other factors.
Sunshine time
Sunshine time has an important influence on atmospheric corrosion and aging of polymer materials and coatings
Can X-ray promote the aging process of polymer materials? The longer the sunshine is? The aging rate of polymer materials is faster. And anytime
Can prolonged UV irradiation also increase the water absorption, adsorption and porosity of the coating? Accelerate coating aging.
temperature
Atmospheric temperature is another important factor affecting atmospheric corrosion. Because it can affect the condensation of water vapor on the coating surface
Solubility of various corrosive gases and salts in water film, resistance of water film and corrosion Battery Reaction in the process of cathode and anode
Speed. The influence of temperature on atmospheric corrosion is also related to the relative humidity in the atmosphere. When the relative humidity in the environment is lower than the metal
At critical relative humidity? Temperature has little influence on atmospheric corrosion, but when the relative humidity reaches the critical relative humidity of metal
When? The influence of temperature is very obvious