SENSOR AND METHOD FOR MEASURING CONTENT OF HYDROGEN IN METAL MELT

摘要

The present invention provides a sensor and measurement method for measuring hydrogen content in metal melt, wherein the sensor comprises a solid proton conductor element, a reference electrode, a quasi-electrode to be measured, a reference compound, a through pipe and an insulating ceramic adhesive. The measurement method comprises the following process steps of (1) inserting the sensor and a corrosion-resistant electrode into the metal melt, and making sure that the solid proton conductor element is fully immersed into the metal melt, the quasi-electrode to be measured is in direct contact with the metal melt and the contact surface is the electrode to be measured; (2) connecting a potentiometer and the reference electrode cable or the metal gas guide pipe to the corrosion-resistant electrode, and measuring potential difference between the reference electrode and the electrode to be measured; and (3) calculating the hydrogen content S of the metal melt according to the measured potential difference, the temperature of the metal melt and the saturated solubility of hydrogen in the metal melt. The proton conductor element of the sensor can be in direct contact with the metal melt, atmosphere of hydrogen equilibrium between the reference compound and the metal melt can be established quickly, the measurement speed is higher, the result is more accurate, and the measurement is simpler after being simplified.