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石油和化学工业使用大量金属油罐储存原油、石油产品和液体化工产品。大多数油罐的寿命为30～40年,因老化,罐底经常出现泄漏。罐底厚度只有5～6mm,一般使用10年以后罐底泄漏就会增加,泄漏会造成罐底底座的破坏,泄漏严重时,产品就要浸泡罐基土壤,如果不及早发现,采取措施,土壤及地下水就会被污染。泄漏是油罐裂缝造成的,造成裂缝的原因多数是由于腐蚀。导致罐底腐蚀的原因很多,如罐内储存了含有腐蚀组分的产品(油田原油可能含有砂子及水);浮顶罐可能被雨水沾污。这种富含氧的雨水经过密封条的间隙浸沉到最低的地方,造成局部腐蚀,
The oil and chemical industry uses large metal tanks to store crude oil, petroleum products and liquid chemical products. The life of most tanks is 30 to 40 years, because of aging, tank bottom often leak. Bottom thickness of only 5 ~ 6mm, the general use of 10 years after the tank bottom leakage will increase, the leak will cause damage to the bottom of the tank basement, the leak is serious, the product should soak tank-based soil, if not detected early to take measures to soil And groundwater will be contaminated. Leakage is caused by cracks in the tank, causing the majority of cracks due to corrosion. There are many reasons that lead to tank corrosion, such as storage of products containing corrosion components (oil in crude oil may contain sand and water); floating roof tanks may be contaminated with rainwater. This oxygen-rich rainwater through the seal of the gap soaking to the lowest place, causing localized corrosion,