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一、前言碱性发兰处理,即碱性氧化处理,是钢制零件表面经化学反应而生成的一种磁性氧化铁(Fe_3O_4)薄层,它的厚度约0.5～1.5μm,最厚不超过3μm因其氧化膜存在微孔,其防护性能差,为此在发兰后,须辅以皂化填充和浸油等补充处理,经补充处理后,氧化膜具有黑色或深蓝色光泽,零件表面均匀、致密、美观,有润滑性和一定的抗蚀性,不产生氢脆,保持零件精度,便于较长时间的保存和运输,也装饰了零件的
I. Introduction Alkaline blue hair treatment, that is, alkaline oxidation, is a thin layer of magnetic iron oxide (Fe 3 O 4) generated by chemical reaction on the surface of steel parts. The thickness is about 0.5 to 1.5 μm and the thickest does not exceed 3μm due to the existence of microporous oxide film, the protective performance is poor, so after the hair blue, to be supplemented by saponification filling and oiling and other supplementary treatment, after the reprocessing, the oxide film has a black or dark blue gloss, parts surface uniform , Compact, beautiful, lubricity and a certain degree of corrosion resistance, does not produce hydrogen embrittlement, maintain the accuracy of parts, easy to save and transport for a long time, but also decorated the parts