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In the process of photocatalytic reaction of large-diameter spiral steel tube, the specific surface area, surface morphology and crystal plane structure of the material have a very important influence on the efficiency of photocatalytic reaction, because the photocatalytic reaction mainly occurs on
1. CleaningUse solvents and emulsions to clean the surface of steel to remove oil, grease, dust, smoothing agent and similar organic matter, but it cannot remove the rust, oxide scale, welding flux, etc. on the surface of the steel, so it is only used as an auxiliary trick in anti-corrosion producti