CN-116793942-B - Multichannel metal material corrosion resistance monitoring devices

CN116793942BCN 116793942 BCN116793942 BCN 116793942BCN-116793942-B

Abstract

The invention discloses a multi-channel metal material corrosion resistance monitoring device which comprises a probe, a voltmeter or a ammeter, wherein the probe comprises a sealing main body, a reference electrode and a working electrode, the reference electrode and the working electrode are arranged in the sealing main body, one ends of the reference electrode and the working electrode are exposed from one side of the sealing main body, the other ends of the reference electrode and the working electrode are sealed in the sealing main body, one ends of the reference electrode and the working electrode sealed in the sealing main body are respectively connected with the voltmeter or the ammeter through wires, one reference electrode is arranged, the reference electrode is positioned in the center of the sealing main body, a plurality of working electrodes are arranged, and the working electrode is not contacted with the reference electrode. The device can continuously monitor the corrosion potential or corrosion current of a plurality of working electrodes in corresponding corrosion environments, and according to the monitored corrosion potential or corrosion current data of the metal materials, the metal materials with good corrosion resistance can be selected for manufacturing refining equipment.

Inventors

CHEN MINDONG
XU SHUJIAN
QU DINGRONG

Assignees

中国石油化工股份有限公司
中石化安全工程研究院有限公司

Dates

Publication Date: 20260508
Application Date: 20220315

Claims (5)

1. The corrosion resistance monitoring device for the multichannel metal material is characterized by comprising a probe and a voltmeter or a ammeter, wherein the probe is connected with the voltmeter or the ammeter through a lead; The probe comprises a sealing main body, a reference electrode and a working electrode, wherein the reference electrode and the working electrode are arranged in the sealing main body, one ends of the reference electrode and the working electrode are exposed from one side of the sealing main body, the other ends of the reference electrode and the working electrode are sealed in the sealing main body, and one ends of the reference electrode and the working electrode sealed in the sealing main body are respectively connected with a voltmeter or a ammeter through wires; the reference electrode is arranged in one way, and the reference electrode is positioned at the center of the sealing main body; The working electrodes are uniformly arranged around the reference electrode, and the working electrodes are not contacted with the reference electrode; a plurality of clamping grooves are uniformly formed in one side of the sealing main body around the center of the sealing main body, a conductive sheet is fixedly arranged in the center of the inner bottom of each clamping groove, sealing gaskets are arranged at two sides of each conductive sheet and inside each clamping groove, the working electrode is arranged in each clamping groove, one side of the working electrode is in contact with each conductive sheet, and each conductive sheet is connected with the voltmeter or the ammeter through a lead; the two ends of each clamping groove are respectively provided with a bolt and nut assembly, each set of bolt and nut assembly comprises a fixing bolt and two fixing nuts which are oppositely arranged, the fixing nuts are fixed on the side face of the sealing main body, the two fixing nuts of each set of bolt and nut assembly are respectively arranged on two sides of each clamping groove, and the fixing bolts are inserted into the fixing nuts to fix the working electrode in the clamping grooves; The fixing bolt and the fixing nut are made of insulating materials; The distance between the reference electrode and the working electrode is 0.01-200 mm; the distance between two adjacent working electrodes is not less than 2mm; A multi-channel metal material corrosion resistance monitoring device is prepared through selecting a cylindrical die, pouring a molten insulating material into the die to prepare a sealing main body, inserting a plurality of wires from one side of the sealing main body and penetrating the wires from the other side before the sealing main body is not completely solidified and molded, cleaning two ends of the wires, preventing the insulating material from wrapping the wires and being incapable of conducting, connecting one end of one wire with a reference electrode, inserting the reference electrode into the sealing main body which is not completely solidified and molded, connecting the wires with the reference electrode, placing a fixing nut along the edge of the sealing main body according to a required working electrode placing position before the sealing main body is solidified, enabling the fixing nut to be tightly fixed with the sealing main body after the sealing main body is solidified, digging a clamping groove in the sealing main body after the sealing main body is solidified, placing conducting plates in each clamping groove, connecting the conducting plates with the rest of the wires, placing sealing gaskets between two sides of the two conducting plates, filling gaps between the clamping grooves and the conducting plates, and polishing one side of the reference electrode and the working electrode after the sealing main body is completely solidified and molded, and the corrosion resistance monitoring device is prepared.
2. The multi-channel metal material corrosion resistance monitoring device according to claim 1, wherein the reference electrode is made of one of Au, ag/AgCl, pt, cu, ti, carbon steel, stainless steel, nickel-based alloy, and high-entropy alloy.
3. The multi-channel metal material corrosion resistance monitoring device according to claim 1, wherein the working electrodes are made of metal materials of different materials.
4. The multi-channel metal material corrosion resistance monitoring device according to claim 1, wherein the sealing body is made of an insulating material, and the sealing body is made of polytetrafluoroethylene or an acrylic material.
5. The multi-channel metal material corrosion resistance monitoring device of claim 1, wherein the reference electrode and the sealing body are both cylindrical.

Description

Multichannel metal material corrosion resistance monitoring devices Technical Field The invention relates to the technical field of metal material corrosion performance monitoring, in particular to a multichannel metal material corrosion resistance monitoring device. Background In the oil refining and chemical industry, oil refining and chemical industry production equipment has equipment failure conditions with different degrees due to the influences of raw material reaction, working environment and the like, wherein the corrosion failure of the oil refining and chemical industry production equipment accounts for more than 40% of the total failure of the equipment, so that the corrosion behavior of equipment materials in oil refining and chemical industry production is necessarily monitored, namely the corrosion behavior of metal materials used in the equipment in the oil refining and chemical industry production is monitored, so that the metal materials with good corrosion resistance are selected for manufacturing the refining equipment. The corrosion behavior of the traditional refining equipment is monitored and calculated through physical properties of process materials and a corrosion model, and the accuracy of measurement and calculation is low due to the problems of limited types of measured materials and measurement accuracy. Existing corrosion testing methods for refining equipment tend to reflect the corrosiveness of the equipment by directly measuring the corrosion behavior of the metal material, and the core of such testing methods is the design of corrosion detection devices in the refining environment. As disclosed in chinese patent 201510583966.7, an image-based metal corrosion high-flux characterization experimental device comprises a high-flux electrolytic cell, a metal electrode, an electrochemical signal acquisition device, an image signal acquisition device and a data processing device, wherein the high-flux electrolytic cell is arranged on a test bed, the bottom of the high-flux electrolytic cell is connected with the electrochemical signal acquisition device through a wire, the upper part of the high-flux electrolytic cell is connected with the electrochemical signal acquisition device through a reference electrode, the image signal acquisition device is arranged above the high-flux electrolytic cell, and the image signal acquisition device and the electrochemical signal acquisition device are both connected with the data processing device; the device is used for metal corrosion test, can synchronously react with a plurality of samples, can simultaneously realize real-time acquisition of electrochemical signals and image signals, acquires images through a camera, utilizes an image signal algorithm to study corrosion characteristics, and finally determines the corrosion degree of the whole image through combining corrosion area proportion and local area corrosion depth, and Chinese patent 201110358680.0 discloses a multichannel galvanic corrosion measuring device which can detect galvanic corrosion potential and galvanic corrosion current of dissimilar metal material pieces. The two corrosion detection devices indirectly represent the activity and corrosion rate of the metal through the corrosion morphology and the galvanic corrosion rate, but can not directly monitor the activity and corrosion rate of the metal. The electrochemical parameters related to the metal activity and corrosion rate are corrosion potential and corrosion current, so the invention is used for directly monitoring the corrosion potential or corrosion current of the metal material for the refining equipment by designing a novel metal material corrosion performance monitoring device, and according to the monitored corrosion potential or corrosion current data of the metal material, the metal material with good corrosion performance is selected for manufacturing the refining equipment so as to improve the corrosion resistance of the refining equipment and prolong the service life of the refining equipment. Disclosure of Invention In order to solve the technical problems, the invention provides a multi-channel metal material corrosion resistance monitoring device, a reference electrode and a plurality of working electrodes are arranged in a sealed main body to form a monitoring probe, the monitoring probe is placed in a corresponding corrosion environment, the reference electrode and the working electrodes are led out through wires to be connected with corresponding voltmeters or galvanometers, so that corrosion potentials or corrosion currents of the working electrodes in the corresponding corrosion environment can be continuously monitored, and metal materials with good corrosion resistance can be selected for manufacturing refining equipment according to the monitored corrosion potential or corrosion current data of the metal materials. In order to achieve the above purpose, the technical solution adopted by the in