A Seawater Circulation System for Corrosion Fatigue Tests on Metal Materials

A technology of corrosion fatigue and metal materials, applied in the fields of analysis of materials, weather resistance/light resistance/corrosion resistance, measuring devices, etc., can solve problems such as the successful design example of seawater circulation system that has not yet been seen, and the lack of detailed textual descriptions of sealing methods.

Inactive Publication Date: 2011-11-30
725TH RES INST OF CHINA SHIPBUILDING INDAL CORP
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Problems solved by technology

[0003] Some literatures have mentioned the materials and production ideas used in the design of the solution circulation system, but they are basically aimed at axial loading (this loading mode is relatively easy to design and manufacture) standard specimens, and few literatures mention it. Design and fabrication methods of circulation systems under non-axial loading modes such as rotational bending loading and cantileve

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  • A Seawater Circulation System for Corrosion Fatigue Tests on Metal Materials
  • A Seawater Circulation System for Corrosion Fatigue Tests on Metal Materials
  • A Seawater Circulation System for Corrosion Fatigue Tests on Metal Materials

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Embodiment Construction

[0017] combine figure 1 , provide the power source micro-pump to drive the circulation of seawater, the water flow control valve to control the water intake, the double-layer anti-leakage corrosion device to ensure that the crack of the sample is always in the seawater and easy to observe clearly, and the filter to ensure that the seawater is always clean Each link is relatively independent and connected with each other, forming a seawater circulation system that ensures that the cracks in the working part of the sample are always in the simulated flow of natural seawater.

[0018] In the past, when conducting axial corrosion fatigue tests, an isolated corrosion device was often designed. As the test progressed, the crack length of the sample could not be clearly observed due to the continuous entry of corrosion products into the corrosive solution, even if certain measures were taken to circulate the corrosive solution. When it flows, it is often difficult to maintain a certa...

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Abstract

A seawater circulation system for performing corrosion fatigue tests on metal materials consists of a seawater container 1, a micro-pump 2, a rubber conduit 3, a water flow control valve 4, a double-layer anti-leakage corrosion device 5, a sample fixing end 6, and a sample surface crack end 7. Low cycle fatigue test sample end 8, sample loading end 9, conduit 10, and filter box 11. The seawater container is inserted into the micro-pump, and the rubber conduit connects the micro-pump and the water flow control valve and communicates with the double-layer anti-leakage corrosion device. The fixed end of the sample, the crack end of the sample surface, and the low-cycle fatigue test can be fixed on the double-layer anti-leakage corrosion device. The sample end, the sample loading end, and the other end of the double-layer anti-leakage corrosion device communicate with the filter box through a conduit, and return to the seawater container after filtration. The low-cycle corrosion fatigue test under the cantilever bending loading mode can be carried out, which changes the previous status of using air fatigue performance data instead of seawater fatigue performance data for metal verification, and increases the safety, reliability and service life of the ship.

Description

technical field [0001] The invention belongs to the technical field of material testing, and more precisely relates to a seawater circulation system for carrying out corrosion fatigue tests on metal materials. Background technique [0002] When the fatigue crack growth rate test of metal materials is carried out in corrosive media, GB / T6398-2000 "Metallic Materials Fatigue Crack Growth Rate Test Method" recommends the use of standard M(T) specimens and standard C(T) specimens. Schematic diagram of the design of the corrosion solution circulation system during the test. For the standard M(T) sample, only a simple schematic diagram is given in the standard, and the figure does not further explain how to prevent the leakage of corrosive liquid. From the schematic diagram, with the periodic reciprocating movement of the sample, the corrosion solution will inevitably leak into the testing machine (the testing machines used by many domestic units are expensive imported equipment)...

Claims

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Application Information

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IPC IPC(8): G01N17/00G01N3/00
Inventor 梁健张亚军张欣耀
Owner 725TH RES INST OF CHINA SHIPBUILDING INDAL CORP
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