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Full-automatic oxygen-deficient corrosion testing device and testing method

A corrosion test, fully automatic technology, used in measuring devices, weather resistance/light resistance/corrosion resistance, instruments, etc., can solve the problem of difficult to test the synchronous and precise control of the concentration of the solution agent and dissolved oxygen, and achieve stability and achieve Precisely controlled effects

Active Publication Date: 2017-06-13
XIAN THERMAL POWER RES INST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The current technology is difficult to achieve synchronous and precise control of the drug concentration and dissolved oxygen concentration in the test solution

Method used

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  • Full-automatic oxygen-deficient corrosion testing device and testing method

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Comparison scheme
Effect test

Embodiment 1

[0023] Such as figure 1 As mentioned above, the fully automatic oxygen-poor corrosion test device of this embodiment mainly consists of an inert gas bottle 1, a dosing device 2, an oxygen electrode 3, a sample hanger 4, a preparation device 5, a reactor 6, a sealed respirator 7, It is composed of pipeline (L1‐L8), electric valve (K1‐K4), thermocouple (R1, R2), liquid level sensor Y and PLC8 control system, etc.

[0024] All containers are square, and the containers, pipelines and electric valves are all made of PVC materials.

[0025] For the test method of the corrosion test device in this embodiment, the dissolved oxygen concentration is set to 0ppb by the man-machine interface, the test temperature is 40°C, the test time is 4h, the solution volume is 600mL, the test device is placed in a 40°C constant temperature water bath, and the sample hanger 4 Hang the carbon steel corrosion test piece, add 1000mL desalted water to the preparation device 5. The first step is the prep...

Embodiment 2

[0027] Such as figure 1 As described, a fully automatic oxygen-poor corrosion test device and method of the present invention mainly consists of a nitrogen bottle 1, a dosing device 2, an oxygen electrode 3, a sample hanger 4, a preparation device 5, a reactor 6, and a sealed respirator 7. It is composed of pipeline (L1‐L8), electric valve (K1‐K4), thermocouple (R1, R2), liquid level sensor Y and PLC8 control system, etc.

[0028] All containers are columnar and made of plexiglass, and the pipelines and electric valves are made of PVC.

[0029]For the test method of the corrosion test device in this embodiment, the dissolved oxygen concentration is set to 700ppb by the man-machine interface, the test temperature is 45°C, the test time is 4h, the solution volume is 700mL, the test device is placed in a 45°C constant temperature water bath, and the sample hanger (4) Hang the carbon steel corrosion test piece, add 1000mL desalted water into the preparation device (5). The first...

Embodiment 3

[0031] Such as figure 1 As described, a fully automatic oxygen-poor corrosion test device and method of the present invention mainly consists of a nitrogen bottle 1, a dosing device 2, an oxygen electrode 3, a sample hanger 4, a preparation device 5, a reactor 6, and a sealed respirator 7. It is composed of pipeline (L1‐L8), electric valve (K1‐K4), thermocouple (R1, R2), liquid level sensor Y and PLC8 control system, etc.

[0032] All containers are spherical, made of glass, the pipeline is made of polytetrafluoroethylene, and the electric valve is made of 304 stainless steel.

[0033] For the test method of the corrosion test device in this embodiment, the dissolved oxygen concentration is set at 6000ppb by the man-machine interface, the test temperature is 50°C, the test time is 5h, the solution volume is 500mL, the test device is placed in a 50°C constant temperature water bath, and the sample hanger 4 Hang the carbon steel corrosion test piece, add 1000mL desalted water t...

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Abstract

The invention discloses a full-automatic oxygen-deficient corrosion testing device and a testing method. The device mainly comprises an automatic control system, an inert gas storage cylinder, a reactor, a preparation device, a hermetical breathing apparatus, a chemical feeder, a sample suspension device, pipelines, electric valves, a liquid level sensor, thermocouples, an oxygen electrode and the like. According to the testing method, oxygen-deficient water preparation and solution preparation are carried out step by step, so that air stripping of solutes due to direct feeding of nitrogen into solution for deoxygenization is avoided; all testing procedures are carried out in one system, and the hermetical breathing apparatus guarantees isolation of the system and the atmosphere to maintain stability of concentration and also ensures free breathing of the system without pressure holding. The full-automatic oxygen-deficient corrosion testing device and the testing method have advantages that accurate preparation of test solutions in any oxygen-deficient concentrations (0ppb-8000ppb) can be realized, precision control is achieved, and full automation of a testing process is realized.

Description

technical field [0001] The invention relates to the technical field of oxygen-poor corrosion test, in particular to a fully automatic oxygen-poor corrosion test device and method. Background technique [0002] In the corrosion and anticorrosion research work, oxygen is a key influencing factor, and it is necessary to conduct experimental research on the corrosion phenomenon under different dissolved oxygen concentrations (oxygen-free, oxygen-poor, and oxygen-enriched). If the gas is directly injected into the test solution to change the dissolved oxygen content in the solution, when the gas-liquid partition coefficient of the solute in the test solution is large, the solute will be blown off in a large amount during the aeration process, resulting in a decrease in the solution concentration and a change in the test conditions. If the test water qualified for dissolved oxygen is prepared in advance, and then the test water is used to prepare the test solution, the air leakage...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N17/00
CPCG01N17/00
Inventor 祁东东黄万启胡振华张洪博
Owner XIAN THERMAL POWER RES INST CO LTD
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