Device and method for testing gas-liquid interfacial corrosion of simulated nuclear waste liquid storage tank
A testing device and testing method technology, applied in measurement devices, weather resistance/light resistance/corrosion resistance, instruments, etc., can solve the problems of inability to simulate corrosion, inability to obtain direct evidence of corrosion mechanism, etc., achieve low cost, improve reliability, Control precise effects
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Image
Examples
Embodiment 1
[0052] See attached figure 1 , a test device for simulating the corrosion of the gas-liquid interface of a nuclear waste liquid storage tank according to the present invention includes a sealing device 1, the sealing device 1 is a transparent glass container, the inside of the sealing device 1 has a cavity, and the top of the sealing device 1 is arranged There is a sealing cover 2 for sealing the cavity, and the sealing cover 2 is a rubber plug; a gas generator 3 is arranged in the cavity, and the gas generator 3 is an open glass container, and the gas generator 3 is filled with solid reactants. The sealing cover 2 is provided with an infusion tube 4 right above the gas generator 3, and the infusion tube 4 can deliver liquid reactants capable of chemically reacting with solid reactants to produce carbon dioxide / oxygen in the gas generator 3, and the infusion tube 4 is connected to the gas generator 3. The outside air is not connected, and the infusion tube 4 is a syringe; one ...
Embodiment 2
[0062] On the basis of Example 1, the temperature of the water bath was adjusted to 34°C, and other parameters remained unchanged, and the corrosion test experiment of the working electrode 7 was carried out again. The experimental results are as attached Figure 4 And attached Figure 5 shown.
[0063] attached by Figure 4 It can be seen that after the ambient temperature rises, the working electrode 7, that is, the metal sample is corroded by the nuclear waste liquid simulation solution, resulting in shorter pitting initiation time; Figure 5 It can be seen that after the ambient temperature rises, the change rate of the pH value at the nuclear waste liquid interface also accelerates; Figure 4 Under the obtained pitting initiation time, all the different concentrations of carbon dioxide correspond to the same pH value of 12.38, which is the pH critical point at which the working electrode 7 corrodes (ie, pitting corrosion) at a temperature of 34°C ; Due to the increase ...
Embodiment 3
[0065] On the basis of Embodiment 1, the measurement probe 9, that is, the plane pH electrode, is inserted into the nuclear waste liquid simulation liquid at 1 cm below the liquid level for monitoring, and other parameters remain unchanged, and the corrosion test experiment of the working electrode 7 is carried out again. The experimental results are as follows attached Image 6 - attached Figure 9 shown.
[0066] attached by Image 6 - attached Figure 9 It can be seen that in this embodiment, the pH values at 1 cm below the gas-liquid interface of all nuclear waste liquid simulation liquids are greater than 12.6, that is, greater than the critical pH value of 12.46 for pitting corrosion of the working electrode 7. Therefore, in this embodiment The middle working electrode 7 does not corrode 1 cm below the gas-liquid interface of the nuclear waste liquid simulation liquid. This further proves that the corrosion of nuclear waste liquid only occurs at the gas-liquid inte...
PUM
| Property | Measurement | Unit |
|---|---|---|
| length | aaaaa | aaaaa |
Abstract
Description
Claims
Application Information
Login to View More