A kind of pH value gel electrolyte buffer layer applied to solid-state Ag/AGCl reference electrode and preparation method thereof
A technology of gel electrolyte and reference electrode, which is applied in the fields of weather resistance/light resistance/corrosion resistance, measuring devices, instruments, etc. It can solve the problems of poor potential stability, affecting service life, and impact, and achieves low cost and enhanced Stability and broad application prospects
Inactive Publication Date: 2017-11-24
HOHAI UNIV
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Problems solved by technology
[0004] However, the study found that the electrode potential of the currently applied solid-state Ag / AgCl reference electrode is easily affected by the pH value of the environmental medium.
Since the pH value in concrete will be affected by many factors such as the water-binder ratio of concrete, admixtures, admixtures, and carbonization, the potential stability of the solid Ag / AgCl reference electrode in the concrete structure will actually deteriorate and affect its use. life
Method used
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Embodiment 1
[0021] Prepared 0.4mol / LKOH+0.1mol / L NaOH+0.8mol / L Ca(OH) 2 Alkaline concrete simulates the pore solution, heats the solution, and keeps the solution temperature at 85°C, adds hydroxyethyl carboxymethyl cellulose to the solution at a ratio of 10:0.5, and stirs the solution vigorously for 20 minutes to prepare a pH gel electrolyte buffer layer .
Embodiment 2
[0023] Prepared 0.8mol / L KOH+0.3mol / L NaOH+1.2mol / L Ca(OH) 2 Alkaline concrete simulates the pore solution, heats the solution, and keeps the solution temperature at 90°C, adds a mixture of hydroxyethyl carboxymethyl fiber and hydroxyethyl methylcellulose to the solution at a ratio of 10:1.5, and stirs the solution vigorously for 30 minutes , to prepare a pH gel electrolyte buffer layer.
Embodiment 3
[0025] Add 5g Ca(OH) per 100g water 2 , to prepare saturated Ca(OH) 2 Solution, heat the solution, and keep the temperature of the solution at 85°C, add hydroxyethyl methylcellulose to the solution at a ratio of 10:0.5, and stir the solution vigorously for 20 minutes to prepare a pH gel electrolyte buffer layer.
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The invention provides a pH value gel electrolyte buffer layer applied in a solid Ag / AgCl reference electrode. The pH value gel electrolyte buffer layer is mainly prepared from a saturated Ca(OH)2 solution or an alkaline simulated cement pore solution , and a polymeric water retention material. The invention also provides a production method of the pH value gel electrolyte buffer layer. Compared with buffer layers in the prior art, the pH value gel electrolyte buffer layer obtained in the invention can be used in the solid Ag / AgCl reference electrode for monitoring the corrosion of steel bars in a concrete structure in order to reduce the loss of an electrolyte in the reference electrode, prolong the service life, reduce the influences of the pH value of a medium and enhance the stability; and the pH value gel electrolyte buffer layer has low cost and good effect, and the production method has the advantages of simplicity, easy popularization and industrialization, and wide application prospect.
Description
technical field [0001] The invention relates to a pH value gel electrolyte buffer layer applied to a solid Ag / AgCl reference electrode and a preparation method thereof, and is applied to the technical field of monitoring reinforcement corrosion in concrete structures. Background technique [0002] Steel bar corrosion is the primary factor affecting the durability and service life of reinforced concrete structures, which has caused huge damage to the national economy and people's lives. The development of reinforcement corrosion monitoring technology in concrete and the real-time grasp of the corrosion status and change process of reinforcement in concrete are of great significance for the durability evaluation of concrete structures and the rational use of repair and reinforcement measures. [0003] Corrosion of steel bars in concrete is essentially electrochemical corrosion, and electrochemical methods should be used to monitor it. Among them, the reference electrode is an...
Claims
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IPC IPC(8): G01N17/02
Inventor 徐金霞高国福蒋林华金鸣
Owner HOHAI UNIV