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All-solid reference electrode for monitoring steel bar corrosion of concrete and its preparation method

A technology of steel bar corrosion and reference electrode, which is applied in the direction of measuring devices, electrochemical variables of materials, weather resistance/light resistance/corrosion resistance, etc., and can solve problems such as limited service life, limited application, and high price

Inactive Publication Date: 2008-03-19
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The reference electrodes prepared in a large number of researches in the past have limited their application in practical engineering due to factors such as limited service life and high price.

Method used

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  • All-solid reference electrode for monitoring steel bar corrosion of concrete and its preparation method
  • All-solid reference electrode for monitoring steel bar corrosion of concrete and its preparation method
  • All-solid reference electrode for monitoring steel bar corrosion of concrete and its preparation method

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Embodiment Construction

[0027] The present invention is described in more detail below in conjunction with accompanying drawing example:

[0028] In combination with Figure 1, the all-solid-state reference electrode for steel corrosion monitoring in concrete in this example adopts the Ag / AgCl / KClsat system, and from the axis of the reference electrode to the outside, there are Ag wire with a purity of 99.99%, an AgCl layer, and three The components are composed of porous layer 3 and cement slurry layer 4.

[0029] In conjunction with Figure 2, the preparation method is:

[0030] 1. Prepare an AgCl layer by direct chlorination on the Ag wire with a diameter of 1 mm and a purity of 99.99%, forming an Ag wire 2 whose surface is an AgCl layer. The specific preparation method and process are as follows:

[0031] (1) get the Ag wire of 1mm diameter, remove surface substance with No. 600 metallographic sandpaper, measure surface area;

[0032] (2) Clean Ag wire with acetone solution to remove surface oil...

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Abstract

The invention provides a full-solid-state reference electrode used for reinforcing steel rust monitoring in concrete and the preparation method. The reference electrode adopts an Ag / AgCl / KClsat system, and consists of an Ag and AgCl layer with 99.99 percent purity, a ter-component porous layer and a cement slurry layer in sequence from the axle center of the reference electrode to the outside. The invention makes a full consideration to the particularity that the rebar corrosion monitoring in concrete requires a reference electrode with a long life and a stable electric potential, and adopts the inexpensive Ag / AgCl / KClsat system to prepare a novel full-solid-state long life reference electrode (ASSRE), and the disadvantages that the service life of the common liquid state reference electrode is short, and the intensity is low are overcome by adopting the ter-component porous structure; simultaneously because the cement slurry with a similar characteristic with the concrete is adopted to be as the outermost layer, the liquid-junction potential between the liquid state reference electrode used commonly and the concrete medium is eliminated, and the accuracy of the electrochemistry measurement is ensured.

Description

(1) Technical field [0001] The invention relates to an all-solid-state reference electrode for monitoring steel bar corrosion in concrete. Specifically, the core component of the sensor designed to monitor the corrosion of steel bars by electrochemical methods-the all-solid-state reference electrode (ASSRE). (2) Background technology [0002] Past studies have shown that steel bar corrosion is one of the causes of damage and early failure of steel-concrete structures. The maintenance and repair of corroded structures and the replacement of components have invested a lot of money around the world. The monitoring of steel bar corrosion in civil engineering is a structural health monitoring and An essential part of full-life design. [0003] In the concrete environment, due to the porosity of concrete, moisture and oxygen can migrate along the pores and cracks, which happens to be a necessary condition for the corrosion of steel such as low carbon steel and high strength alloy...

Claims

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Application Information

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IPC IPC(8): G01N27/30G01N17/02
Inventor 欧进萍乔国富
Owner HARBIN INST OF TECH
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