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我们厂生产中使用的钢制设备,需要耐稀硫酸腐蚀,多数采用搪铅和衬铅。但是在钢板上搪铅,由于外伤作用和搪铅质量不好,引起以下问题:一是内部未搪好,铅和钢板未吃牢;二是搪的铅上有气孔或夹杂物,硫酸渗透,使钢板腐蚀穿孔,造成搪铅设备不能使用。在这种情况下,不可能将其设备拆下来平焊修补,只好采用立式焊补修理。修补工艺如下:
The steel equipment used in our factory production needs to be resistant to dilute sulfuric acid and most of them are lead-enameled and lead-lined. However, due to the traumatic effects and the poor quality of the lead-enamelling lead to the following problems, the first is that the interior is not enamelled, the lead and the steel are not eaten firmly, and the second is the stomatal or inclusions in the enameled lead. The sulfuric acid permeates, Corrosion of the steel perforation lead to lead-lead equipment can not be used. In this case, it is impossible to remove the equipment to flatten the repair, had to use vertical welding repair. Repair process is as follows: