Low-volatility corrosion testing device

Abstract

The invention belongs to corrosion testing technology, and in particular discloses a low-volatility corrosion testing device, which comprises a flask, a cooling inner tube arranged on the mouth of the flask, and a cooling outer tube arranged in the cooling inner tube; the upper and lower parts of the cooling outer tube are respectively provided with a cooling water outlet pipe and a cooling water inlet pipe; the cooling inner tube comprises a lower ball clustering tube and an upper spiral tube which are communicated; the tube wall at the bottom of the ball clustering tube is connected with the cooling outer tube; the tube wall on the top of the spiral tube is connected with the cooling outer tube; the inner side at the bottom of the cooling outer tube is provided with an annular collecting tank; the bottom of the annular collecting tank is connected with a flow guiding tube of which the flow guiding port has the section vertical to the horizontal plane; the top of the spiral tube is provided with a glass ball of which the diameter is slightly greater than the inner diameter of the orifice of the spiral tube; and the orifice of the cooling outer tube is provided with a hollow tube plug. The low-volatility corrosion testing device can ensure that the test solution in a corrosion test has little volatility, the change of components of the test solution is greatly reduced, and simultaneously the solution in the corrosion test forms continuous and stable refluxed liquid.

Description

technical field [0001] The invention belongs to corrosion test technology, in particular to a novel corrosion test device with low volatility. Background technique [0002] In the engineering environment that needs to use various high-temperature acidic or alkaline media, the structural materials used in the equipment must have sufficient corrosion resistance to these media (the corrosion rate must not exceed the design specification), and relevant inspections are required. Enhanced corrosion test. However, the general corrosion test equipment currently used for uniform corrosion, stress corrosion, intergranular corrosion, crevice corrosion, etc. has insufficient cooling capacity for the escaping steam generated by high temperature, so the volatilization of the solution used in the corrosion test will cause the composition of the test solution to change. Changes will affect the test results and reduce the reliability of the calculated corrosion rate; at the same time, the i...

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Problems solved by technology

The device has the disadvantages that the cooling water cannot be circulated and the return liquid cannot be formed.

[0005] Existing steam cooling devices on the market usually have two structures, one is as attached figure 1 The shown string is spherical, and the cooling water is passed through the string tube 1, and the steam rises in the string tube 1 and is cooled and condensed, but the disadvantage of this cooling tube is that the steam can easily escape through the tube; the other is like figure 2 In the spiral tube 5 shown, it is difficult for steam to escape, but the reflux resistance of the condensed liquid is very large, and a stable reflux cannot be formed

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