Intermittent immersion corrosion test method and device based on slow tensile stress corrosion testing machine

A corrosion test and tensile stress technology, applied in the direction of measuring devices, weather resistance/light resistance/corrosion resistance, using stable tension/pressure to test the strength of materials, etc., can solve the problem of not being able to simulate the immersion environment in the tidal range and unable to characterize materials Stress corrosion sensitivity and other issues, to achieve the effect of ensuring long-term stable operation, simple structure, and easy disassembly

Inactive Publication Date: 2017-01-11
725TH RES INST OF CHINA SHIPBUILDING INDAL CORP
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Problems solved by technology

In the existing immersion corrosion testing machine, the tested sample is in a non-stressed state, and the corrosion rate is calculated by the weight loss method, which cannot characterize the stress corrosion sensitivity of the mate

Method used

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  • Intermittent immersion corrosion test method and device based on slow tensile stress corrosion testing machine
  • Intermittent immersion corrosion test method and device based on slow tensile stress corrosion testing machine
  • Intermittent immersion corrosion test method and device based on slow tensile stress corrosion testing machine

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Embodiment Construction

[0028] Since the test method of the present invention is implemented using the infiltration device of the present invention, the specific implementation of the infiltration device will be described first.

[0029] Such as figure 1 and figure 2 As shown, the interleaving device of the present invention includes a corrosion box 1, an overflow box 2, a pump 3, a constant temperature water bath box 4, and a corrosive medium container 5 arranged in the constant temperature water bath box 4; in this embodiment, the pump 3 adopts a submersible pump , directly arranged at the bottom of the corrosion medium container 5, avoiding the leakage of the corrosion medium and creating a good test environment; the bottom surface of the corrosion box 1 is provided with a sample hole, and the sample hole is set as a tapered hole with a large top and a small bottom, There is a rubber ring 8 for fixing the sample in the tapered hole. The sample hole is set in a tapered shape to make the rubber ri...

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Abstract

The invention relates to the technical field of material corrosion testing and discloses an intermittent immersion corrosion test method and intermittent immersion device based on a slow tensile stress corrosion testing machine. A tensile section of a sample is fixed to the intermittent immersion device, the two ends of the sample are fixed to a connection rod (12) and a base (13) of the slow tensile stress corrosion testing machine respectively, corrosion media can soak the sample in the corrosion box (1) at intervals through a corrosion box (1), a pump (3) and a liquid inlet hole (6) and a liquid outlet hole (7) in the corrosion box (1), slow tensile stress corrosion testing is combined with intermittent immersion testing, and stress corrosion resistance of a metal material in the tidal and splash zone environment can be evaluated more scientifically. The method has the advantages of being high in operability, low in reformation cost, high in practicality and the like, and can adapt to different types of slow tensile stress corrosion testing machines, round bar samples, rectangular samples and samples in other forms. The testing device is simple in structure and convenient to disassemble and assemble, and normal use of the slow tensile stress corrosion testing machine is not affected.

Description

technical field [0001] The invention relates to the technical field of material corrosion testing, in particular to an interleaving corrosion testing method based on a slow tensile stress corrosion testing machine and an interleaving device. Background technique [0002] Stress corrosion refers to the corrosion damage of metals caused by the combined action of tensile stress and corrosive environment. It is a kind of brittle fracture with high risk. The slow tensile stress corrosion test is an effective test method to characterize the stress corrosion resistance of materials. This method can quickly evaluate the stress corrosion performance of materials, and the test cycle is short. It has been widely used in material evaluation and quality assurance testing. [0003] Due to the tidal phenomenon of the ocean, the superstructure area of ​​the ship and the offshore platform present two different working states: submerged in seawater and exposed to the air. This alternating fe...

Claims

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Application Information

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IPC IPC(8): G01N3/56G01N3/08G01N17/00
CPCG01N3/56G01N3/08G01N17/00G01N2203/024
Inventor 张利娟梁健查小琴
Owner 725TH RES INST OF CHINA SHIPBUILDING INDAL CORP
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