INTELLIGENT CORROSION PROTECTION AND MONITORING SENSOR SYSTEM AND METHOD THEREOF
Provided are an intelligent corrosion protection and monitoring sensor system, and a method thereof. The intelligent corrosion protection and monitoring sensor system includes an anode plate, and a thickness of a middle portion of the anode plate is smaller than that of two side portions of the anode plate to form a bridge-shaped structure. The anode plate is mounted on a steel structure, there is a gap between the middle portion of the anode plate and the steel structure, and the two side portions of the anode plate are in contact with the steel structure. A piezoelectric sheet is provided on a side surface, away from the steel structure, of the middle portion of the anode plate, and the piezoelectric sheet is electrically connected to a monitoring control system.
1 . An intelligent corrosion protection and monitoring sensor system, comprising an anode plate, wherein a thickness of a middle portion of the anode plate is smaller than that of two side portions of the anode plate to form a bridge-shaped structure; the anode plate is mounted on a steel structure, a gap is formed between the middle portion of the anode plate and the steel structure, and the two side portions of the anode plate are in contact with the steel structure; a piezoelectric sheet is provided on a side surface, away from the steel structure, of the middle portion of the anode plate, and the piezoelectric sheet is electrically connected to a monitoring control system; the monitoring control system is capable of controlling application of a voltage to the piezoelectric sheet to make the piezoelectric sheet generate mechanical vibration and transmit the mechanical vibration to the anode plate and the steel structure, and the monitoring control system is also capable of measuring and analyzing a voltage change of the piezoelectric sheet caused by the mechanical vibration so as to monitor a corrosion condition.
2 . The intelligent corrosion protection and monitoring sensor system according to claim 1 , further comprising an encapsulation layer covered on the piezoelectric sheet and the anode plate around the piezoelectric sheet.
3 . The intelligent corrosion protection and monitoring sensor system according to claim 1 , wherein the anode plate and the steel structure are mounted and connected by a bolt connector.
4 . The intelligent corrosion protection and monitoring sensor system according to claim 3 , wherein the two side portions of the anode plate and the steel structure are provided with bolt holes, the bolt connector comprises a ceramic bolt and a ceramic nut which are matched with each other, and the ceramic bolt passes through the bolt hole.
5 . The intelligent corrosion protection and monitoring sensor system according to any one of claims 1 to 4 , wherein the anode plate a zinc plate, and/or the piezoelectric sheet is a lead zirconate titanate piezoelectric sheet.
6 . The intelligent corrosion protection and monitoring sensor system according to any one of claims 1 to 4 , wherein the monitoring control system comprises an electrochemical impedance spectrometer.
7 . The intelligent corrosion protection and monitoring sensor system according to any one of claims 1 to 4 , wherein the middle portion of the anode plate has a thickness of 5 mm, and the two side portions have a thickness of 10 mm.
8 . A method for manufacturing the intelligent corrosion protection and monitoring sensor system of claim 2 , comprising the following steps:
step S 11 , welding a wire to the piezoelectric sheet;
step S 12 , heating the anode plate on a heating stage, and fixing the piezoelectric sheet to a middle portion of the anode plate using a lead-free solder and solder paste, pressing against the piezoelectric sheet using an iron nugget to ensure that the lead-free solder melts completely and is attached firmly between the anode plate and the piezoelectric sheet; and completing the fixation of the piezoelectric sheet and the anode after cooling;
step S 13 , encapsulating the piezoelectric sheet and the anode plate using epoxy resin, cooling, and then hardening the epoxy resin to form the encapsulation layer; and
step S 14 , mounting and fixing the anode plate to the steel structure by bolted connection.
9 . An application method of the intelligent corrosion protection and monitoring sensor system of claim 1 , comprising the following steps:
step S 2 , soaking the steel structure and the anode plate in a solution to simulate a corrosive environment, and performing electrochemical impedance test and data acquisition and analysis through the monitoring control system;
performing the electrochemical impedance test and data acquisition and analysis further comprises the following steps:
step S 21 , respectively recording an initial weight of the anode plate and a current weight of the anode plate after corrosion at different corrosion time; applying an AC (alternating current) voltage with a frequency of 10 kHz-30 kHz to the piezoelectric sheet through the monitoring control system at different corrosion time, making the piezoelectric sheet vibrate, then monitoring and recording frequency resonance of the piezoelectric sheet caused by the corrosion of the anode plate, and collecting admittance to form a data record form and/or a data relationship graph; and obtaining resonance frequencies of the anode plate in a plurality of different corrosion states according to a relationship between the admittance and the frequency in the data record form and/or the data relationship graph;
step S 22 , calculating a frequency offset rate and a corrosion rate of the anode plate according to the data obtained in the step S 21 ;
wherein
frequency
offset
rate
=
(
current
resonance
frequency
-
initial
resonance
frequency
)
/
initial
frequency
;
and
corrosion
rate
=
(
initial
weight
-
current
weight
)
/
initial
weight
/
corrosion
time
;
step S 23 , according to the data obtained in the step S 22 , obtaining a linear function relationship between the frequency offset rate and the corrosion rate by linear regression analysis; and
step S 24 , for the intelligent corrosion protection and monitoring sensor system applied to the steel structure mounted in practical engineering, performing electrochemical impedance test and data acquisition and analysis through a monitoring control system, and predicting a frequency offset rate and/or a corrosion rate based on the linear functional relationship between the frequency offset rate and the corrosion rate obtained in the step S 23 , thus monitoring the corrosion condition.
10 . The application method of the intelligent corrosion protection and monitoring sensor system according to claim 9 , wherein the intelligent corrosion protection and monitoring sensor systems are distributed at different node positions of a steel modular integrated building;
the method further comprises Step S 3 , continuously monitoring by the monitoring control system at set time intervals, and generating a visualization chart to reflect a corrosion condition at each position of the steel modular integrated building, and/or giving an alarm to remind staff to check and intervene in time.