过去焊补汽车油罐,要用大量热水和火碱进行严格清洗,洗后还得开盖晾上几天;有时也采用吹高压气的办法,但高压气费用昂贵。为此研究用绝热焊补方法来焊补油罐,做到了既安全又经济。焊前把油罐中的油放尽,用冷水冲洗一遍,用棉纱把焊口周围的油、水等脏物擦干净。把石 In the past, welding tanks for automobiles were to be cleaned strictly with a large amount of hot water and caustic soda. After washing, they had to be opened and left to dry for a few days. In some cases, they were also used to blow high-pressure gas, but high-pressure gas was expensive. For this reason, welding insulation repair welding method to make up the oil tank, so that both safe and economical. Before welding, drain the oil from the tank and rinse it again with cold water. Clean the oil, water and other dirt around the weld with cotton yarn. Put the stone