JPS6020036Y2 - corrosion test equipment - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a corrosion testing device that can simultaneously test a plurality of specimens under the same conditions.

Conventionally, when a plurality of specimens, such as test pieces, are subjected to a corrosion test at the same time in a flowing gas, the plurality of test pieces are placed in a test tank.

According to this device, the atmospheric gas composition in contact with each test piece,
In particular, impurity gas cannot be kept constant, and corrosion products from corroded test pieces mix into the flowing gas, which affects other test pieces, making it difficult to conduct accurate corrosion tests. It was difficult.

It is extremely difficult to accurately control the gas composition in this type of corrosion test equipment for use in a gas atmosphere, and furthermore, it is difficult to maintain uniform conditions that affect corrosion, such as the gas composition or flow rate inside the corrosion test equipment. Met.

For example, metal materials used in high-temperature gas furnaces using helium gas as a cooling medium are made of impurity gases (co, co□, H2°H20, CH4,
0°N2, etc.).

Therefore, in order to design a safe high temperature gas reactor, it is necessary to perform accurate corrosion tests.

On the other hand, in order to eliminate as much as possible corrosion products that have a large effect on accuracy, and to prevent the test gas used once from coming into contact with another specimen, it has conventionally been necessary to set up a separate test chamber downstream of the gas in the test chamber. This was a problem in terms of improving test efficiency.

The present invention was developed in view of the above-mentioned disadvantages of the conventional methods, and enables high-precision testing without being affected by the mutual influence of specimens.
Furthermore, the present invention aims to provide a corrosion testing device that can perform more efficient corrosion testing by using a multilayered testing chamber.

Therefore, the present invention has a corrosion test tank that accommodates a specimen, introduces a test gas into the tank, and performs a corrosion test on the specimen. a partition plate that is provided in the partition plate and forms a plurality of compartments each accommodating a specimen; a gas introduction pipe that communicates with the gas supply means and passes through the compartments and is disposed on the partition plate; The gist of the present invention is a corrosion testing apparatus characterized by comprising a gas discharge port that is provided and opens into each compartment, and a specimen holder disposed within the compartment.

In other words, the present invention has multiple layers by providing compartments (test chambers) in the gas flow direction using partition plates, and also allows fresh test gas from the gas supply means to be supplied to each compartment by a gas introduction pipe that penetrates each compartment. This enables highly accurate and more efficient corrosion testing of multiple test specimens fixed to the specimen holding jig in each compartment.

An embodiment of the corrosion testing apparatus of the present invention will be described with reference to FIGS. 1 and 2.

In the figure, 1 is a circular stainless steel bottom plate, and 2 is airtightly erected almost vertically so as to pass through the center of the bottom plate 1 from below, and is communicated with a quantitative supply means (not shown). A gas supply pipe 3 is a support leg made of stainless steel placed on the upper surface of the bottom plate 1 so as to surround the gas supply pipe 2;
Reference numeral 5 indicates a support stand made of stainless steel having a smaller circular shape than the bottom plate 1, with the gas supply pipe 2 placed on the top surface of the support base leg 3 so as to pass through the center; 5 indicates the gas supply pipe 2 on the top surface of the support stand 4; A fixing member made of silica glass with a smaller circular shape than the support base 4 is placed so as to penetrate through the center, and 6 is a cylindrical support member made of silica glass with the same diameter placed on the top surface of the fixing member 5. The height is formed to be slightly lower than the gas supply pipe 2.

7 is a gas introduction pipe whose lower inner periphery is connected to the outer periphery of the upper part 2A of the gas supply pipe 2 by sliding, and the outer periphery of the upper part 7A serves as a sliding part, and 7B is a horizontal pipe fixed to the lower outer periphery of the gas introduction pipe 7. The disc-shaped partition plates 7C are a plurality of vertical partition plates provided so that one side is fixed in the direction of the outer peripheral axis of the gas introduction pipe 7 and the other side extends radially, and four partition plates are arranged in FIG. 2. There is.

7D is a specimen holder protruding from the partition plate 7C, and 7E is a gas discharge port provided in the gas introduction pipe 7 so as to open into the space formed by the horizontal partition plate 7B and the vertical partition plate 7C. , P are specimens held by the specimen holder 7D, and thus the compartment T1 is formed.

The bottom surface of the horizontal partition plate 7B of the compartment T1 is supported by the top surface of the cylindrical support member 6.

The diameter of the horizontal partition plate 7B is formed to be slightly smaller than the diameter of the cylindrical support member 6, and the radial end face of the vertical partition plate 7C is formed to fit within the horizontal partition plate 7B.

The lower inner periphery of the gas introduction pipe 7 of the compartment T2 is connected to the outer periphery of the upper part 7A of the gas introduction pipe 7 of the compartment T1 by sliding. Chambers τ□, T2, etc. are installed.

Note that heat-resistant silica glass is used as the material for the compartments described above.

Further, the vertical partition plate 7C is not necessarily required, and the specimen holder 7D may be fixed to the outer periphery of the gas introduction pipe 7 when the partition plate 7C is not used.

Furthermore, the means for connecting the compartments to each other is not necessarily limited to this example.

8 is the fixing member 5, the cylindrical support member 6, and the compartment T1. T
The furnace core tube 9 is made of silica glass and is placed on the support stand 4 so as to contain the furnace core tubes 8 at intervals, and is made of a refractory material such as alumina. 10 is a heater disposed in the heating furnace main body 9; 11 is a heating furnace placed on the upper surface of the heating furnace main body 9, provided with a gas outlet 11A, and made of a refractory material such as alumina; It is a lid, a support stand 4, and a heating furnace body 9.
, a heater 10, a heating furnace lid 11, and the like constitute a heating furnace F.

Note that descriptions of temperature detection means, control means, power supply connection terminals, etc. are omitted.

Reference numeral 12 denotes a stainless steel corrosion test tank placed on the upper surface of the bottom plate 1 via a ring packing 13, and is fastened to the floor plate 1 by a plurality of bolts 14 arranged at the collar.

15 is connected to the corrosion test tank 12 via a ring packing 16.
A lid made of stainless steel is placed on the top surface and has a handle 15A at the top, and is fastened to the top surface of the corrosion test tank 12 by a plurality of bolts 17 disposed on the collar.

18 is a gas outlet pipe arranged on the side wall of the corrosion test tank 12.

Now, for the test, the bolts 17 are removed, the handle 15A is hung with a hanger, the lid 15 is opened, and the heating furnace lid 11 is then opened.

After taking out the compartment T1゜12 etc. from the inside of the furnace tube 8 and suspending a predetermined number of specimens P on the specimen holder 70, the compartments T,
The lower part of the upper part 2A of the gas supply pipe 2 is inserted, and then the lower part of the compartment T2 is inserted into the upper part of the compartment T1, and the predetermined compartments are sequentially connected to the reactor core tube 8 in the gas flow direction (vertical direction). Install them so that they fit inside.

Next, the heating furnace lid 11 is placed on the top surface of the heating furnace main body 9, and then the i15 is placed on the top surface of the corrosion test tank 12 and fastened with bolts 17.

A test gas is introduced from the gas supply pipe 2 to replace the inside of the tank with the test gas, and then the temperature inside the heating furnace F is raised to a predetermined temperature using the heater 10 without feeding the test gas at a predetermined rate to perform a corrosion test. I do.

Here, the test gas is passed from the tip of the gas supply pipe 2 through the gas discharge lower E to the compartment T1. After entering T2 and contacting the specimen P, the gas passes upward through the gap in the furnace tube 8 and is discharged from the gas outlet pipe 18 via the gas outlet 11A.

Moreover, the compartment T1. T2 and the like are arranged approximately in the center of the corrosion test tank 12, and the specimen P is heated by the heater 10 of the heating furnace F via the furnace core tube 8, so that it is heated at a constant temperature.

Accordingly, the following effects can be obtained by the apparatus according to one embodiment of the present invention.

(1) Compartment room T1. Since T2 can be individually divided in the gas flow direction and connected in series with the gas introduction pipe 7, a large number of specimens P can be tested at the same time. The number of ... can be increased or decreased as needed.

To (2) Compartment room T1. '12 is independent, so the specimens P can be placed in independent spaces, there is no influence between the specimens P, and multiple specimens P can be tested at the same time under the same conditions. .

(3) Since the horizontal partition plates 7B are provided in the compartments T and T2, the corrosion products that have fallen off from the specimen P can be received, which is effective in gas corrosion tests where it is difficult to evaluate the amount of corrosion as a feed material.

(4) Furthermore, since the vertical partition plate 7C is provided, even if corrosion products etc. that have fallen off from the specimen P are mixed into the gas, they will not come into contact with other specimens P, allowing for stable testing.

As described in detail above, the present invention has the structure described in the claims of the above-mentioned utility model registration, so multi-layered compartments are provided in the gas flow direction while maintaining high accuracy so as not to be affected by the interaction of the specimens. This allows for highly efficient testing, which is several times more efficient than conventional equipment.

[Brief explanation of drawings]

Fig. 1 is a vertical sectional view of a device showing one embodiment of the present invention;
The figure is a perspective view of the main part of FIG. 1. 7: Gas supply pipe, 7D: Specimen holder, 7E: Gas discharge port, 12: Corrosion test tank, P: Specimen, T1. T2: Compartment room.

Claims (1)

[Scope of utility model registration request] In a corrosion test apparatus that has a corrosion test tank that accommodates a specimen, a test gas is introduced into the tank, and a corrosion test is performed on the specimen. a partition plate forming a plurality of compartments each accommodating a gas, a gas introduction pipe that communicates with the gas supply means and passes through the compartment and is disposed on the partition plate; A corrosion test apparatus comprising: a gas discharge port opening into the compartment; and a specimen holder disposed within the compartment.