Crevice corrosion is a localized corrosion phenomenon that occurs in tight crevices. The crevice can be caused by the structure, or it can be caused by scaling or sediment and the underlying covering surface. In the early days, it was believed that titanium rods and titanium tubes would not have crevice corrosion in seawater and salt spray. Later, in high-temperature chloride medium, wet chlorine gas, hydrochloric acid solution, formic acid, and oxalic acid solution for corrosion inhibition by oxidants, etc., crevice corrosion occurred one after another. , Crevice corrosion damage raw equipment.
The crevice corrosion of titanium rods and titanium tubes is related to many factors such as ambient temperature, chloride type and concentration, pH value, and the size and geometry of the gap. In addition, the crevice composed of titanium and polytetrafluoroethylene, titanium and asbestos, etc. is more sensitive to crevice corrosion than the crevice composed of titanium and titanium.
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