Normal temperature leather diaphragm passivating agent before spraying and coating steel workpiece and preparation method thereof

钢铁工件喷涂涂装前常温皮膜钝化剂及其制备方法

Abstract

The invention relates to a normal temperature leather diaphragm passivating agent before spraying and coating a steel workpiece, comprising the raw materials by mass percent: 2-8% of phytic acid, 0.1-3% of tartaric acid, 0.3-2% of citric acid, 2-6% of sodium benzoate, 4-8% of triethanolamine and the rest of tap water. A preparation method comprises: adding the metered tap water into a reaction kettle, starting a stirrer under the normal temperature and pressure, and stirring at the speed of 450-550r/min; then, sequentially adding the tartaric acid, the sodium benzoate, the triethanolamine, thecitric acid and the phytic acid, continuously stirring for 20-40min after adding every material, and continuously stirring for 0.5-1.5h after adding all the materials; and finally, checking by sampling and packaging until the solution in the reaction kettle is even light purple transparent water-soluble liquid. The passivating agent can be used under the condition of normal temperature, and has the advantages of simple technique, convenient operation, no need for a heating device, low production cost, no pollution, simple technology of the preparation method, easy control and convenient operation.
钢铁工件喷涂涂装前常温皮膜钝化剂,原料及质量百分比为:植酸2~8%、酒石酸0.1~3%、柠檬酸0.3~2%苯甲酸钠2~6%、三乙醇胺4~8%、自来水余量。其制备方法为:将计量的自来水加到反应釜中,在常温常压下开动搅拌器,按450~550转/分钟的速度进行搅拌,并依次加入酒石酸、苯甲酸钠、三乙醇胺、柠檬酸、植酸,每加一种材料都要连续搅拌20~40分钟,加完所有的材料后继续搅拌0.5~1.5小时,使反应釜中的溶液呈淡紫色透明均匀的水溶性液体,即可抽样检查并放料包装。本钝化剂可在常温状态下使用,工艺简单,操作方便,无需加温设备,生产成本低,无污染,制备方法工艺简单,易控制,好操作。

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