Method for determining the concentration of a metal salt and an acid of a pickling acid containing the metal salt used for quality control of pickling baths comprises measuring the sound velocity, electrical conductivity and temperature

摘要

Method for determining the concentration of a metal salt and an acid of a pickling acid containing the metal salt comprises measuring the sound velocity in the pickling acid, the electrical conductivity of the acid and the temperature of the acid. An independent claim is also included for a device for determining the concentration of a metal salt and an acid of a pickling acid containing the metal salt comprising a measuring path (1) through which the acid flows, a measuring unit (4) for determining the sound velocity in the acid in the path, a measuring unit (6) for determining the pickling acid conductivity and a temperature measuring unit.