论文部分内容阅读
热轧变压器硅钢片经过退火和酸洗后,常常在钢片表面上附着一层不均匀的灰白色氧化白膜。这层白膜被证明是2FeO·SiO_2。它与硫酸很少起作用,既便增加硫酸浓度,提高酸洗温度,延长酸洗时间,甚至将钢片洗出漏洞,亦很难去掉;它在烘干以后比较紧密地附着在板面上,用人工擦刷也不易除去。但经过一段时间存放,即变成粉末状态,容易擦掉。这给使用单位涂绝缘漆带来很大困难。另一方面,变压器硅钢片经过酸洗以后,除去了表面氧化铁皮,同时也将保护基体不易生锈的氧化薄膜洗掉。硅钢片在大气中比较容易氧化生锈,生产和使用单位,经
Hot-rolled transformer silicon steel after annealing and pickling, often attached to the surface of the steel sheet is not uniform gray-white oxide white film. This layer of white film proved to be 2FeO · SiO_2. It has little effect with sulfuric acid, it is hard to remove even when increasing the sulfuric acid concentration, raising the pickling temperature, prolonging the pickling time and even washing the steel sheet out of the loopholes; it is more tightly adhered to the board after drying , With manual brushing is not easy to remove. However, after a period of storage, that becomes a powder state, easily erased. This is very difficult to use units coated insulation paint. On the other hand, the transformer silicon steel after pickling to remove the surface of the oxide scale, but also to protect the substrate is not easy to rust oxide film washed off. Silicon steel in the atmosphere more easily oxidized rust, production and use of units