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1 引言在以硝酸根作为促进剂或以硝酸根和亚硝酸根作为联合促进剂的磷化液中,磷酸根和硝酸根的含量有一定的要求,而且二者有一定的比例要求,配制磷化液时,二者可按我们设计好的数量配制,但磷化液在使用过程中,磷酸根和硝酸根是不断变化的,如果能用一种简单可行的方法,测出二者分别的含量,这将对工作有很大帮助,使磷化液的调整维护这一复杂的工作变得简单、明了.2 测试的必要性众所周知,以磷酸根和硝酸根作为主要成分的磷化液,配制时,需要较高的硝酸根,也就是说,配槽液中硝酸根比磷酸根含量高,在成膜过程,因为磷化成膜是
1 Introduction Nitrate as a promoter or nitrate and nitrite as a joint accelerator phosphating solution, phosphate and nitrate content have certain requirements, and both have a certain proportion of requirements, the preparation of phosphorus When the solution, the two can be prepared according to the amount of our design, but the phosphating solution in use, phosphate and nitrate are constantly changing, if we can use a simple and feasible method, the two were measured Content, which will be of great help to the work, so that the phosphating solution to adjust and maintain the complexity of the work becomes simple and clear.2 The need for testing As we all know, phosphates and nitrate as the main component of the phosphating solution, Preparation, the need for higher nitrate, that is to say, with nitrate in the bath than the high phosphate content in the film forming process, because the phosphate film is