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Sensor for measuring content of hydrogen in metal melt and measuring method

A metal melt and sensor technology, applied in the field of hydrogen measurement sensing, can solve the problems of reducing the response speed, easily blocking the gas chamber, affecting the measurement accuracy, etc., and achieves the effect of simplified and simple method, more intuitive method, and fast measurement speed.

Active Publication Date: 2016-02-10
NORTHEASTERN UNIV LIAONING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method has the following disadvantages: (1) It takes a long time for the metal melt to establish equilibrium with the gas chamber, resulting in a low response speed of the sensor; (2) The material used to establish the gas chamber in the sensor is mostly ceramic cover or fiber material. Water is easy to adhere to the surface of the material. During the measurement process, the water reacts with the metal melt to produce a large amount of hydrogen, which affects the accuracy of the measurement results; (3) During multiple measurements, the metal and metal oxides attached to the probe surface are easy to block the gas. room, resulting in slower establishment of equilibrium, reduced response speed, and even affects measurement accuracy

Method used

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  • Sensor for measuring content of hydrogen in metal melt and measuring method
  • Sensor for measuring content of hydrogen in metal melt and measuring method
  • Sensor for measuring content of hydrogen in metal melt and measuring method

Examples

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Effect test

Embodiment 1

[0067] Sensors for measuring the hydrogen content in aluminum melts, e.g. figure 1 and figure 2 shown, including CaZr 0.9 In 0.1 o 3-α Solid proton conductor element 1, reference porous electrode 2, quasi-test electrode 6, reference substance Ar-H 2 , stainless steel air guide tube 3, corundum through tube 5, alumina-based insulating ceramic binder 4 and polytetrafluoroethylene tee fixture 104; wherein the solid proton conductor element 1 is a tube structure, the material is perovskite, and one end is made of Alumina-based ceramic adhesive 4 is sealed, and the through pipe 5 and the solid proton conductor element 1 are connected through the insulating ceramic adhesive 4 to form an inner space. The surface of the solid proton conductor element 1 located in the space is the inner surface, exposed The outer surface is the outer surface; the reference porous electrode 2 is coated on the inner surface of the solid proton conductor element 1 and the alumina-based ceramic binde...

Embodiment 2

[0080] The sensor that measures the hydrogen content in the aluminum melt is the same as embodiment 1, such as image 3 As shown, the difference is that the sensor structure also includes a reference electrode wire 7, the material is metal platinum, which is inserted into the quartz through tube 5 through the copper three-way fixture 104, connected with the gold reference porous electrode 2, and connected externally to the Measuring circuit; the material of the air guide tube is corundum; the material of the solid proton conductor element 1 is CaZr 0.9 sc 0.1 o 3-α ; Tee clamp 104 is made of copper; the material of the through pipe is quartz; the reference porous electrode is made of porous gold.

[0081] The method of using the sensor to measure the hydrogen content in the metal melt is carried out according to the following process steps: ① Insert the sensor and the graphite corrosion-resistant electrode into the aluminum melt at 750°C, and ensure that the solid proton con...

Embodiment 3

[0083] The sensor that measures the hydrogen content in the aluminum melt is the same as embodiment 1, such as Figure 4 As shown, the difference is that: the solid proton conductor element 1 used in the sensor structure is a sheet structure; the material of the through pipe 5 is stainless steel; As the gas outlet, the vertical distance between the gas outlet and the uppermost end of the solid proton conductor is 2~5mm; the material of the gas guide tube is nickel-chromium alloy; the reference gas is He-H 2 , the molar hydrogen content is 1.00%.

[0084] The method for measuring the hydrogen content in the molten metal with the sensor is carried out according to the following process steps: ① insert the sensor and the graphite corrosion-resistant electrode into the molten aluminum at 750°C, and ensure that the solid-state proton conductor element is completely submerged in the molten metal , the electrode to be tested is in direct contact with the metal melt, and the contact ...

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Abstract

The invention provides a sensor for measuring the content of hydrogen in a metal melt and a measuring method. The sensor structurally comprises a solid-state proton conductor element, a reference electrode, a quasi-to-be-detected electrode, a reference substance, a communicating pipe and an insulating ceramic adhesive. The measuring method comprises the following steps: (1) inserting a sensor and a corrosion-resistant electrode into a metal melt, ensuring that a solid-state proton conductor element is completely immersed into the metal melt and a quasi-to-be-detected electrode and the metal melt are in direct contact, wherein the contact surface is a to-be-detected electrode; (2) connecting a potentiometer, a reference electrode conductor or a metal gas-guide pipe and a corrosion-resistant electrode and measuring the potential difference between a reference electrode and the to-be-detected electrode; (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. According to the sensor, the proton conductor element can be in direct contact with the metal melt, the atmosphere of balance between the reference substance and hydrogen in the metal melt can be quickly built, the measurement speed is higher, the measurement result is more accurate and the sensor is simpler by simplification.

Description

technical field [0001] The invention relates to a hydrogen measuring sensor technology, in particular to a sensor and a measuring method for measuring hydrogen content in molten metal. Background technique [0002] In general, hydrogen is a harmful element in metal materials, which can cause defects such as hydrogen embrittlement, porosity, and pinholes in metal materials. Timely measurement of hydrogen content in metals, and proper dehydrogenation treatment after information feedback can avoid various hydrogen-induced defects in metal materials. [0003] EP0544281 Japan Tokyo Kiln Co., Ltd. discloses a device for measuring the hydrogen content in aluminum melts with a solid proton conductor, which can measure the hydrogen content in metal melts below 1000°C, such as aluminum melts. [0004] Since the hydrogen content in the gas can be measured by using a solid proton conductor hydrogen sensor, the reference electrode and the electrode to be measured of the solid proton con...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N27/26
CPCG01N27/4114G01N33/005G01N27/30G01N27/301G01N33/2025
Inventor 厉英丁玉石周旭东
Owner NORTHEASTERN UNIV LIAONING
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