Nano-modified thermoelectric mortar and preparation method thereof, as well as intelligent cathodic protection and deterioration self-monitoring system for thermoelectric structure and preparation method thereof

Abstract

The invention relates to nano-modified thermoelectric mortar and a preparation method thereof, as well as an intelligent cathodic protection and deterioration self-monitoring system for a thermoelectric structure and a preparation method thereof. The nano-modified thermoelectric mortar is prepared from a thermoelectric component, a conductive component, a mineral admixture, hill sand, a superplasticizer, water and cement. The obtained nano-modified thermoelectric mortar has the advantages of intrinsic strength and impermeability durability of a thermoelectric structure substrate, high thermoelectric coefficient, high conductivity sensing performance when being used as a power supply of a thermoelectric module and a damage self-sensing layer for the thermoelectric structure with a temperature difference between inside and outside, and intelligent cathodic protection and protective layer deterioration self-monitoring efficiency of the thermoelectric structure can be realized synchronously.

Description

technical field [0001] The invention relates to a nano-modified thermoelectric mortar and a preparation method, and an intelligent cathodic protection and degradation self-monitoring system and preparation method for thermoelectric structures, belonging to the technical fields of nanocomposite materials, cathodic protection and sensing detection. Background technique [0002] With the rapid development of my country's industry 2.0, 3.0, and 4.0 in parallel, the number and capacity of thermoelectric structures such as thermoelectric chimneys, cooling towers, and storage tanks in various places have increased geometrically. However, the environment where the corresponding thermoelectric structure is subjected to alternating spraying, humid heat and salt spray erosion will make its corrosion degradation much more serious than that of ordinary structures, and its protective surface layer will also be easily degraded and peeled off. Traditional structural anti-corrosion methods s...

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Problems solved by technology

However, this is still a sacrificial anode method, which cannot overcome the defects of small protective current, short life of anode materials, and difficult construction.

The impressed current cathodic protection method also faces the following main problems in the actual construction, operation and maintenance process: it is difficult to provide a stable power supply for the thermoelectric structure (especially the thermoelectric structure in remote areas), the system structure is complex, and the power will increase the structural insecurity Factors, etc., obviously need to further develop cathodic protection technology with self-contained power supply

[0005] However, on the one hand, because the above-mentioned thermoelectric components manganese dioxide, zinc oxide, cuprous oxide, bismuth telluride, and skutterudite compounds have high thermoelectric coefficients, but their internal resistance is high, under the action of continuous temperature difference between the inside and outside of the thermoelectric structure The temperature difference current generated is limited, and it is often difficult to meet the requirements of the thermoelectric structure corrosion self-immune cathodic protection power supply, and it is necessary to simultaneously introduce conductive components to reduce its resistivity; It has a certain impact on the final hardening strength of the mortar. It is necessary to replace the cementitious material, add fibers or ultra-fine admixtures to toughen and reinforce, thereby ensuring the intrinsic protection function of the thermoelectric mortar to the thermoelectric structure; on the other hand, it is impossible to Effective and timely early warning of scaling, deterioration, cracking and peeling of the corresponding protective layer

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