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Gas/liquid corrosion simulation test device and test method

A technology for simulating test and corrosion reaction. It is used in weather resistance/light resistance/corrosion resistance, measuring devices, instruments, etc. It can solve the problems of small number of samples, complex structure, toxic gas leakage, etc., and achieve simple structure and high control accuracy. , the effect of less environmental pollution

Inactive Publication Date: 2013-10-23
ANGANG STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The device can simulate the corrosion environment of multi-phase media with different flow states and different compositions, but its disadvantage is that the structure is complex and the number of samples that can be accommodated in a single reactor is small. In addition, when the reactor is filled with H 2 There is a potential safety hazard of toxic gas leakage during long-term tests of toxic gases such as S

Method used

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  • Gas/liquid corrosion simulation test device and test method
  • Gas/liquid corrosion simulation test device and test method
  • Gas/liquid corrosion simulation test device and test method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Embodiment 1, when simulating the gas corrosion environment, for example, when simulating the corrosion environment on the upper deck of the cargo oil tank of an oil tanker, H 2 S 500ppm, O 2 4%, N 2 The steel cylinder 1 of the balance (volume percentage) mixed gas is connected to the gas path, and the sample with a size of 25mm×60mm×5mm is placed in the slot 20 of the sample holder 12, and 0.1% of the mixed gas is injected into the corrosion reaction tank 10. NaCl aqueous solution (mass percentage composition), then the sample holder 12 is fastened on the corrosion reaction tank 10 together with the corrosion reaction tank upper cover 11 with bolts, the door of the cabinet 7 is opened, and the sample holder 12 and the upper cover will be fixed. The corrosion reaction tank 10 of 11 is put into the case that heating pipe 9 is installed, connects inlet pipe 14 and outlet pipe 15, closes chamber door behind the thermocouple 13 installed. Start the programmable controller...

Embodiment 2

[0019] Embodiment 2, when simulating liquid corrosion, hang the sample on the sample holder 12 with an insulating fine wire, inject the corrosive liquid required for the test into the corrosion reaction tank 10, and then hang the sample holder 12 with the sample together with the corrosion The upper cover 11 of the reaction tank is fastened on the corrosion reaction tank 10 with bolts, the sample is completely or partially immersed in the corrosive solution according to the test requirements, the door of the box 7 is opened, and the corrosion reaction of the sample holder 12 and the upper cover 11 is installed. The tank 10 is put into the box, and the box door is closed after the thermocouple 13 is installed. Start the programmable controller 8, heat up after inputting the temperature control parameters, start timing the test when the predetermined temperature is reached, and turn off the programmable controller 8 when the predetermined test time is reached. The sample is remo...

Embodiment 3

[0020] Example 3, when simulating a static gas-liquid coexistence corrosion environment, the steel cylinder 1 containing the gas required for the test is connected to the gas circuit, the sample is suspended on the sample holder 12 with an insulating thin wire, and injected into the corrosion reaction tank 10 The corrosive solution required for the test is then fastened to the corrosion reaction tank 10 with the sample holder 12 with the sample hung on the corrosion reaction tank upper cover 11 with bolts, all or part of the sample is immersed in the corrosive solution, and the opening of the box 7 door, put the corrosion reaction tank 10 fixed with the sample rack 12 and the upper cover 11 into the box, connect the air inlet pipe 14 and the air outlet pipe 15, and close the door after installing the thermocouple 13; start the programmable controller 8 and The gas flow controller 5 inputs temperature and gas flow control parameters respectively. After the gas-tightness inspect...

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Abstract

The invention provides a gas / liquid corrosion simulation test device and a test method. The device is formed by a gas supply system, a corrosion reaction pot, a temperature control system, a medium flow-state control system, a safety alarm system and a tail gas treatment system, wherein the gas supply system is used for conveying corrosive gas into the corrosion reaction pot through a gas inlet pipe; tail gas exhausted by the corrosion reaction pot is conveyed to the tail gas treatment system through a gas outlet pipe; the gas supply system is formed by sequentially connecting a gas bottle, a decompressor, a gas flow controller and a gas mixing pot; the upper part of the corrosion reaction pot is provided with a test sample frame and an upper cover; the temperature control system comprises a heating pipe and a thermoelectric couple and is controlled by a programmable controller; the medium flow-state control system is a magnetic stirrer and is located at the bottom of the corrosion reaction pot. The device disclosed by the invention can simulate a plurality of corrosion environments of gas, liquid, static gas-liquid coexistence, laminar flow gas-liquid coexistence and the like, and is simple in structure, easy to maintain, good in safety and small in environmental pollution; the device does not need to be guarded by a specially-assigned person in a use process.

Description

technical field [0001] The invention belongs to the technical field of corrosion tests, in particular to a gas / liquid corrosion simulation test device and test method. Background technique [0002] Industrial atmospheres usually contain SO 2 , NO 2 、H 2 For corrosive gases such as S, materials in this environment often have a higher corrosion rate than in the general atmosphere, and the environment in which materials are exposed during the extraction, storage and transportation of crude oil and natural gas is even harsher. The corrosion research of materials in corrosive gas and gas-liquid mixed environment is an important part of material corrosion research. Although the on-site coupon test can faithfully reflect the corrosion situation, it has the disadvantages of long test period, various and uncontrollable influencing factors, and poor reproducibility. Therefore, fast and effective laboratory simulation test methods have attracted much attention. [0003] The patent...

Claims

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Application Information

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IPC IPC(8): G01N17/00
Inventor 高鹏徐小连钟彬艾芳芳李琳武裕民陈义庆
Owner ANGANG STEEL CO LTD
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