在钢管镀锌生产中,清除钢管表面氧化铁皮的传统酸洗工艺方法具有金属损失率高,断头现象增多,能源消耗大,污染严重,废酸处理复杂等缺点。为克服这些缺点,东华机械厂采用淮北矿务局科研所新研究的钢铁除锈、钝化新工艺清除钢管表面氧化铁皮取得成功。 In the galvanized steel pipe production, the traditional pickling process for removing the oxide scale on the surface of the steel pipe has the disadvantages of high metal loss rate, increased breakage, high energy consumption, serious pollution and complicated waste acid treatment. In order to overcome these shortcomings, Donghua Machinery Factory adopted the newly-researched steel rust removal and new passivation technology of the Huaibei Mining Bureau Scientific Research Institute to eliminate the oxide scale on the surface of the steel pipe.