Corrosion test loading device and test method for short transverse direction of metal plate

A metal sheet, corrosion test technology, applied in the direction of measuring device, weather resistance/light resistance/corrosion resistance, analysis of materials, etc., can solve the problems of unable to load, unable to reach service conditions, unable to process standard tensile specimens, etc. To achieve the effect of adjustable loading size and good neutrality

Inactive Publication Date: 2017-12-08
725TH RES INST OF CHINA SHIPBUILDING INDAL CORP
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve the above-mentioned technical problems, the present invention provides a corrosion test loading device and test method for the short transverse direction of the metal plate, which solves the problem that due to the thickness limitation of the metal plate, the short transverse direction of the plate is often unable to process the standard tensile sample, and it cannot be used on the testing machine. Loading and simulated working condition tests in the laboratory usually do not meet the ideal service conditions and other issues

Method used

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  • Corrosion test loading device and test method for short transverse direction of metal plate
  • Corrosion test loading device and test method for short transverse direction of metal plate
  • Corrosion test loading device and test method for short transverse direction of metal plate

Examples

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Embodiment 1

[0036] Example 1: A 304 steel plate with a thickness of 38mm is subjected to a stress of about 100MPa for a long time. A micro-plate tensile sample is taken in the short transverse direction (thickness direction) of the plate, and the size of the clamping end is 10 (width) × 2 (thickness) ) mm, the size of the parallel section of the sample is 5 (width) × 1 (thickness) mm, the length of the parallel section is 14mm, the loading stress is 100MPa, the loading tension is calculated to be 500N, and the known stainless steel spring specification is 4×22×70mm × 8 (wire diameter × outer diameter × length × number of turns), the spring deformation can be calculated to be about 9.3mm, after the loading is completed, the non-parallel section of the sample is encapsulated in paraffin. Place the loaded fixture in the service environment or laboratory environment, and observe the changing behavior of the sample regularly.

Embodiment 2

[0037] Example 2: A 7xxx series aluminum alloy plate with a thickness of 40mm is required to perform an interleaving test under the condition of loading 241MPa according to the customer’s requirements. A small tensile sample is taken from the height direction of the plate, and the size of the clamping end is 10×2mm , the size of the parallel section of the sample is 5×0.7mm, the length of the parallel section is 16mm, the loading stress is 241MPa, the loading tension is calculated to be 843N, and the spring specification is 4×22×70mm×8 (wire diameter×outer diameter×length× Turns), the spring deformation can be calculated to be about 15.9mm, after the loading is completed, the non-parallel section of the sample is encapsulated in paraffin. Place the loaded fixture in the service environment or laboratory environment, and observe the changing behavior of the sample regularly.

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Abstract

The invention discloses a corrosion test loading device and a test method for the short transverse direction of a metal plate. The test method comprises the following steps: making the loading device, pre-loading, loading and performing a test. The loading device is provided with a frame-shaped loading frame; a cubic hole is formed in the upper part of the loading frame; an upper plug pin loading section extends into the loading frame through the cubic hole; a clamping groove A which is matched with a test sample clamping section A is formed in an upper plug pin loading section which extends into the loading frame; a rotary nut, a gasket A, a spring and a gasket B are mounted at the end head of a threaded section out of the loading frame; the shape of one end of a lower plug pin is matched with that of a through hole, and the lower plug extends into the loading frame through the through hole; the diameter of the other end of the plug pin is greater than that of the through hole; a clamping groove B which is matched with a test sample clamping section B is formed in the lower plug pin which extends into the loading frame; the two ends of a plate test sample are clamped on the clamping groove A and the clamping groove B; loading is performed by twisting the rotary nut, and no torque is generated; the loading strength can be adjusted through a spring with a known elastic coefficient.

Description

technical field [0001] The invention relates to a corrosion test method, in particular to a loading device and a test method for short transverse corrosion tests on metal plates. Background technique [0002] Metal sheets are widely used in large-scale projects such as construction, transportation, aerospace, and ocean engineering. Under long-term service environments, metal sheets are vulnerable to corrosion, fatigue, and their combined effects to cause damage and failure. In view of the forming method of the plate, generally speaking, its corrosion performance is weakest in the thickness direction, that is, the short transverse direction. Therefore, the performance data of the short transverse direction has the most research and use value. In addition, the simulated working condition test in the laboratory usually does not meet the ideal service conditions, and the indoor accelerated corrosion can only qualitatively analyze the failure trend, and cannot correspond to the c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N17/00
CPCG01N17/00
Inventor 罗先甫查小琴张文利
Owner 725TH RES INST OF CHINA SHIPBUILDING INDAL CORP
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