Method for determining chromic acid point in galvanizing passivation solution by using automatic potentiometric titrator

The invention discloses a method for determining a chromic acid point in a zinc plating passivation solution by using an automatic potentiometric titrator, which is based on a titration template of the instrument and realizes two times of parallel calibration work in one cycle through a self-established titration design. And a calculation formula is self-designed according to the characteristic of calculating an end point by a dynamic potential equivalent point, so that the consumption volume calibrated twice can be accurately and independently given, and a calibrated correction coefficient value is calculated according to the designed formula and is used for detecting and calculating the chromic acid point of a passivation solution sample, so that the high-precision measurement of the chromic acid point in the zinc plating passivation solution is realized. 本发明公开了一种用自动电位滴定仪测定镀锌钝化液中铬酸点的方法，以仪器自带的滴定模板为基础，通过自建的滴定设计，实现了一个循环内完成2次平行标定工作，并根据动态电位等当点计算终点的特点自行设计计算公式实现能准确独立给出2次标定的消耗体积，并按照设计的公式计算出标定后的校正系数值，用于钝化液样品铬酸点的检测计算