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我厂的产品中,不锈钢零件很多,有的产品几乎全部采用不锈钢材制成。原只有一种适于碳钢、铜合金的印字药水。为了把好零件检验关,保证产品质量,急需一种能在不锈钢零件上印字的药水。我们分析了不锈钢材料的特点是:耐腐蚀性强,在常温时难溶于酸。而印字药水只能在常温条件下使用。因此,除了有供显色的试剂外,还必须找到一种能在常温下对不锈钢有溶解腐蚀能力的溶解酸,才能使置换、还原反应得以在零件表面进行,并显现出颜色来。经过多种浓度的酸和混合酸的试验,发现盐酸在其浓度为1:1时,在常温条件下对不锈钢有一定的腐蚀能力。但用盐酸作溶解酸后,通常用作显色种的硝酸银便不能应用。我们参考了有关资料,通过试验,选用了反应后能显现颜色的亚硒酸作显色剂,又对其使用浓
I plant products, many stainless steel parts, and some products are almost all made of stainless steel. The original only for a carbon steel, copper alloy printing syrup. In order to check the good parts, to ensure product quality, urgent need for a stainless steel parts can be printed on the syrup. We analyzed the stainless steel material is characterized by: corrosion resistance, insoluble in acid at room temperature. The printing syrup can only be used under normal temperature conditions. Therefore, in addition to having a reagent for color development, it is necessary to find a dissolved acid that can dissolve stainless steel at room temperature to allow displacement and reduction to proceed on the surface of the part and show a color. After a variety of concentrations of acid and mixed acid test and found that hydrochloric acid at its concentration of 1: 1, at room temperature stainless steel has a certain corrosion resistance. However, with hydrochloric acid as a dissolved acid, usually used as a color of silver nitrate can not be applied. We refer to the relevant information, through the experiment, the choice of the reaction can show the color of selenite as a developer, and its use of concentrated