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在硅钢片表面,使其生成0.01～0.02毫米厚的一层氧化薄膜,作为电机(变压器)、电器冲片的片间绝缘,乃是最经济、方便的方法,而且适于大批量生产。氧化膜处理是将硅钢片放在氧化气氛中,在一定的温度下保温,从而使冲片表面生成 Fe_2O_3和 Fe_3O_4薄膜的工艺过程。这层薄膜具有均匀、坚固、良好的绝缘性能。氧化剂有二氧化碳、空气加水蒸汽以及水蒸汽法等。不管采用何种氧化剂,其基本原理均是氧化剂与红热的铁接触时,发生氧化反应,从而得到 Fe_2O_3和 Fe_3O_4。
On the surface of silicon steel sheet, it can form a layer of oxide film with the thickness of 0.01 ~ 0.02mm. It is the most economical and convenient method to insulate the sheet metal of the motor (transformer) and electrical sheet, and is suitable for mass production. Oxide film treatment is placed in an oxidizing atmosphere of silicon steel, at a certain temperature insulation, so that the surface of the film generated Fe_2O_3 and Fe_3O_4 film process. This film has a uniform, strong, good insulation properties. Oxidants are carbon dioxide, air and water steam and steam law. Regardless of which oxidizing agent is used, the basic principle is that when the oxidizing agent comes into contact with the red hot iron, an oxidation reaction takes place, whereby Fe 2 O 3 and Fe 3 O 4 are obtained.