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Method and device for full-immersion corrosion test under constant-tension condition

A corrosion test, constant tension technology, applied in the direction of weather resistance/light resistance/corrosion resistance, measuring devices, instruments, etc., can solve the problem of inability to accurately evaluate the full immersion corrosion resistance of the tested material, and achieve good corrosion environment simulation performance. , the effect of increasing the accuracy

Inactive Publication Date: 2014-04-02
武汉钢铁有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0002] The uniform corrosion full immersion test of the metal material laboratory can evaluate the corrosion resistance of the metal material completely immersed in the test solution in the laboratory. However, in the existing uniform corrosion full immersion test of the metal material laboratory, the It is in a non-stressed state during the immersion process, which is far from the actual service state of the metal material, and cannot accurately evaluate the total immersion corrosion resistance of the tested material

Method used

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  • Method and device for full-immersion corrosion test under constant-tension condition
  • Method and device for full-immersion corrosion test under constant-tension condition
  • Method and device for full-immersion corrosion test under constant-tension condition

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Embodiment 1

[0052] The length, width and height of the parallel portion 11 of the sample are 150mm×20mm×4mm respectively. Before immersing in the test solution, a load is applied to the sample as a parallel sample, so that the parallel portion 11 of the sample as a parallel sample bears 90% Rel of tensile stress. The test solution is a NaCl solution with a mass percent concentration of 3%, and the solution temperature is 30°C. During the test, the test solution was stirred continuously. The corrosion resistance of steel is evaluated by the corrosion rate. The smaller the corrosion rate, the better the corrosion resistance of the steel.

Embodiment 2

[0054] The length, width and height of the parallel portion 11 of the sample are 150mm×20mm×4mm respectively. Before immersing in the test solution, a load is applied to the sample as a parallel sample, so that the parallel portion 11 of the sample as a parallel sample bears 90% Rel of tensile stress. The test solution is 0.1mol / L Na 2 SO 4 , the solution temperature is 35°C. The solution was stirred continuously during the test. The acid rain resistance of steel is evaluated by the corrosion rate, and the lower the corrosion rate, the better the corrosion resistance of the steel.

Embodiment 3

[0056] The length, width and height of the parallel part 11 of the sample are respectively 150 mm × 20 mm × 1 mm. Before immersing in the test solution, a load is applied on the sample as a parallel sample, so that the parallel part 11 of the sample as a parallel sample bears 98% Rel of tensile stress. The test solution is a NaCl solution with a mass percent concentration of 3%, and the solution temperature is 30°C. During the test, blow air to the test solution continuously to saturate the test solution with gas. The corrosion resistance of the steel is evaluated by the fracture time, the longer the fracture time, the better the corrosion resistance of the steel.

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Abstract

The invention discloses a device for a full-immersion corrosion test under a constant-tension condition. The device comprises a test container, a test platform located below the test container, a pull system, a temperature control system arranged on the container, a plurality of first test sample chucks fixed at the top of the test platform, and a plurality of second test sample chucks fixedly connected with the pull rod of the pull system, wherein a plurality of bottom through holes matched with each test sample which is used as a parallel sample are formed in the bottom of the test container; the top of the test container is opened; each test sample used as the parallel sample penetrates through the opening in the top of the test container and the corresponding bottom through hole; a parallel sample sealing strip is arranged on each bottom through hole; each first test sample chuck and each corresponding second test sample chuck are used for fixing the both ends of the sample used as the parallel sample respectively. According to the device for full-immersion corrosion test disclosed by the invention, the accuracy of the full-immersion corrosion test on a sheet metal under the constant-tension condition is improved.

Description

technical field [0001] The invention relates to the technical field of corrosion tests, in particular to a full immersion corrosion test method and equipment thereof under constant tension conditions. technical background [0002] The uniform corrosion full immersion test of the metal material laboratory can evaluate the corrosion resistance of the metal material completely immersed in the test solution in the laboratory. However, in the existing uniform corrosion full immersion test of the metal material laboratory, the It is in a non-stressed state during the immersion process, which is far from the actual service state of the metal material, and cannot accurately evaluate the total immersion corrosion resistance of the tested material. Contents of the invention [0003] The purpose of the present invention is to provide a method of full immersion corrosion test under constant tensile force and its equipment. The method and equipment make the tested sample closer to the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N17/00
Inventor 张万灵李立军刘建容黄先球石争鸣程鹏郎丰军马颖何锐
Owner 武汉钢铁有限公司