Real-time monitoring device and method for surface salt settling volume

A technology of real-time monitoring and settlement, applied in the direction of material impedance, etc., can solve the problems of poor timeliness of measurement method results, and achieve the effects of shortening measurement time, ensuring timeliness, and simple operation process

Active Publication Date: 2022-01-25
CHINA NAT ELECTRIC APP RES INST
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The device and method for real-time monitoring of surface salt deposition of the present invention can monitor the salt depos

Method used

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  • Real-time monitoring device and method for surface salt settling volume
  • Real-time monitoring device and method for surface salt settling volume
  • Real-time monitoring device and method for surface salt settling volume

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Experimental program
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Effect test

Embodiment 1

[0042] In this embodiment, the width of the fingers is 50 μm, and the distance between adjacent fingers is 50 μm.

[0043] The first step is to draw the relationship curve between the amount of salt precipitation and the impedance value; the precipitation on the surface of the interdigitated electrode 7 of the monitoring probe 3 is 1mg / m 2 NaCl, and put the probe in an environment with a relative humidity of 80%. After placing it for 10 minutes, the salt deposited on the surface of the interdigital electrode 7 absorbs moisture to form a liquid film. The host 1 of the monitoring device generates a 10kHz fixed-frequency AC excitation signal through the transmission wire. 2. Pass to the interdigital electrode 7 of the monitoring probe 3, and analyze the received feedback signal to obtain the impedance value of the liquid film on the interdigital electrode 7 surface; change the NaCl settlement on the interdigital electrode 7 surface of the monitoring probe 3 to 4 , 8, 20, 80, 200,...

Embodiment 2

[0047] In this embodiment, the drawing of the corresponding relationship between the salt deposition amount and the measured impedance value in the first step is shown in Embodiment 1.

[0048] In the second step, the monitoring equipment is placed in the marine atmosphere environment for 7 days, and continuous measurement is performed. The impedance monitoring frequency of the equipment is 1 hour, and the power of the cooling plate 11 is controlled during the measurement. When the relative humidity measured by the temperature and humidity sensor is stable at 80 %, measure the impedance value of the liquid film on the surface of the interdigital electrode 7, and obtain the surface salt deposition amount according to the relationship curve between the salt deposition amount and the impedance value, and finally measure the surface salt deposition amount as Figure 4 shown.

[0049] In addition, if it is to be used for a long time in an environment with relatively high salt depos...

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Abstract

The invention discloses a real-time monitoring device and method for surface salt settling volume, the monitoring device comprises a host and a monitoring probe, the host generates a fixed-frequency AC excitation signal and transmits the signal to an interdigital electrode in the monitoring probe, and the host analyzes a feedback signal to obtain impedance value information; the salt settling volume on the surface of the interdigital electrode is determined according to a pre-formulated relation curve between the salt settling volume and the impedance value, and the salt settling volume in the actual environment can be obtained. The monitoring device can change the relative humidity of the surrounding environment of the interdigital electrode by adjusting the temperature, so that salt settled on the surface of the interdigital electrode absorbs moisture to form a liquid film, and the real-time monitoring of the salt settling volume on the surface of the interdigital electrode is realized. Compared with an existing measurement method, the method has the advantages that the operation process is simple, the measurement procedure is effectively simplified, the measurement time is greatly shortened, online real-time continuous monitoring of the salt settling volume can be realized, and the timeliness of the measurement result is ensured.

Description

technical field [0001] The invention relates to the field of monitoring salt deposition in the atmospheric environment, in particular to a real-time monitoring device and method for surface salt deposition. Background technique [0002] Salt is a key factor causing corrosion of metallic materials in the environment. After the salt in the environment settles on the metal surface, the surface will absorb moisture to form a thin liquid film in a certain relative humidity environment, which will promote the corrosion of the metal, and the amount of precipitated salt is closely related to the corrosion rate. The corrosion rate of the material is very important. [0003] The traditional methods for measuring salt deposition are the dry sheet method and the wet candle method. However, both of these two salt deposition measurement methods require manual operation in the measurement area, the measurement time is long and the measurement process is cumbersome, and the final measurem...

Claims

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Application Information

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IPC IPC(8): G01N27/02
CPCG01N27/02
Inventor 刘浩然刘淼然向利陈川王俊揭敢新
Owner CHINA NAT ELECTRIC APP RES INST
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