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油罐经过几年的使用以后,外部会有不同程度的腐蚀,尤其是第一圈壁板和边缘板的腐蚀更为严重,原因是第一圈壁板和边缘板直接接触罐基础,地下的潮气使得边缘板和第一圈壁板下部常年处于潮湿状态,导致腐蚀。经实际观测:使用8年的20000m~3浮顶油罐,外部采用聚氨酯泡沫喷涂保温层,第一圈壁板下部距地面200mm处,腐蚀3～4mm,边缘板腐蚀4～5mm。使用10年的10000m~3拱顶油罐,采用珍珠岩保温块外包玻璃钢保温皮,第一圈壁板下部150mm处,腐蚀4～5mm,边缘板腐蚀6～7mm。第二圈以上的壁板腐蚀很轻,有的根本没有腐蚀迹象。可见,第一圈壁板和边缘板是防腐重点,直接关系到油罐的使用寿命,如不及时补救,就会有穿孔的危险。如何补救和修理呢?如果将第一圈壁板统
After several years of use of the tank, the exterior will have different degrees of corrosion, especially the first ring wall and the edge of the more serious corrosion of the edge plate, the reason is that the first ring wall and the edge plate directly contact the tank foundation, underground Moisture makes the edge of the plate and the first ring of the lower part of the wall is always wet, resulting in corrosion. The actual observation: the use of 8 years of 20000m ~ 3 floating roof tank, polyurethane foam spraying exterior insulation layer, the first ring of the lower part of the wall 200mm from the ground, corrosion 3 ~ 4mm, edge plate corrosion 4 ~ 5mm. The use of 10 years of 10000m ~ 3 vault oil tank, perlite insulation block outsourcing fiberglass insulation skin, the first ring wall 150mm lower part of the corrosion 4 ~ 5mm, edge plate corrosion 6 ~ 7mm. The wall above the second lap is very lightly eroded, and some show no evidence of corrosion. Visible, the first ring wall and the edge of the board is the key anti-corrosion, directly related to the life of the tank, if not remedied, there will be perforation danger. How to remedy and repair it? If the first ring wall system