Corrosion Environment Of Sluice Gate And Factors Affecting Corrosion

Corrosion environment of steel structure sluice gate and factors affecting corrosion:

Corrosion environment of steel structure sluice gate

Some steel structure sluice gates and steel structures in water conservancy and hydropower projects are immersed in various water quality (seawater, fresh water, industrial wastewater, etc.) for a long time; Some are often in a dry wet environment due to water level changes or gate opening and closing; some will also be impacted by high-speed water flow and friction of sediment, floating debris and ice; The part on the water surface or above the water is also affected by the humid atmosphere of water evaporation and splashing water mist; Structures working in the atmosphere are also affected by sunlight and air. Because the working environment of hydraulic gate is bad and there are many influencing factors, it is necessary to analyze the corrosion factors.

Corrosion factors

(1) climatic factors: the water part of the steel structure sluice gate is easy to be corroded by the sun, rain and humid atmosphere.

⑵ surface condition of steel structure: roughness, mechanical damage, holes, welding defects, gaps, etc. have a great impact on corrosion.

(3) stress and deformation: the greater the stress and deformation, the worse the corrosion.

(4) water quality: the salt content of fresh water is low, and the corrosion of gate varies depending on its chemical composition and pollution; Seawater has high salt content and good conductivity. Seawater contains a large amount of chloride ions, which is highly corrosive to steel. The corrosion of steel gate in seawater is more serious than that in fresh water.