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A pure water immersion corrosion test fixture and test device

A technology of corrosion experiment and infiltration device, which is applied in the direction of workpiece clamping device, measuring device, weather resistance/light resistance/corrosion resistance, etc. It can solve the problems that cannot meet the requirements of immersion corrosion test, and the pollution effect of pure water is large, so as to achieve low cost , high cost, the effect of preventing crevice corrosion

Active Publication Date: 2021-09-17
BAOSHAN IRON & STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, in the electrochemical test, the dilution of pure water and the pollution effect of the solution on pure water are not as great as those in the immersion test.
The design of this patent cannot meet the requirements of long-term and large-scale immersion corrosion tests

Method used

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  • A pure water immersion corrosion test fixture and test device
  • A pure water immersion corrosion test fixture and test device
  • A pure water immersion corrosion test fixture and test device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0047] Using the device to conduct FeCl3 immersion corrosion test on 2205 stainless steel welded joints with reference to ASTM923 standard method C, the specific process is as follows:

[0048] 1. Use anhydrous alcohol to ultrasonically clean the surface of the sample to remove oil residue on the surface, dry it and weigh it.

[0049] 2. Take two pieces of laboratory filter paper, cut a 25mm*50mm hole in the middle, and cover the upper and lower surfaces of the sample after wetting with pure water. Then place the sample between the upper and lower cover plates and tighten the fastening bolts.

[0050] 3. Put the flexible film between the upper and lower cover plates, and realize the sealed connection of the two through glue or other means, forming a closed pure water bag. Then connect the pure water pipe and inject the pure water pre-placed in the graduated cylinder into the bag through the delivery pump to realize circulation. After keeping it for 30 minutes, observe whethe...

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Abstract

The invention discloses a pure water immersion type immersion corrosion test fixture, which comprises a pure water immersion device, a pure water storage space arranged in the pure water immersion device, a sample fastening device arranged on the pure water immersion device, and a pure water immersion device. The storage space stores pure water and is used to accommodate samples, and at least one layer of high-purity water diffusion barrier is arranged at the gap between the pure water infiltration device and the sample. The invention also discloses an experimental device using the fixture. The method of pure water infiltration solves the crevice corrosion problem of the contact part between the sample and other materials, solves the problem of solution contamination of pure water and pure water dilution solution during long-term immersion, and shields the influence of the edge effect of the sample in the immersion corrosion test. It is suitable for immersion corrosion test of metal materials in corrosive medium within 100℃ under normal pressure.

Description

technical field [0001] The invention belongs to pure water immersion type immersion corrosion experiment technology, in particular to a pure water immersion type immersion corrosion experiment fixture and experimental device. Background technique [0002] Immersion is the most commonly used experimental method for material corrosion evaluation. This type of method places the sample in a corrosive environment, and evaluates the corrosion behavior of the characterized material by observing the corrosion status of the sample and recording the corrosion weight loss. The crevice corrosion problem at the contact point between the sample and other materials and the edge effect of the sample are two major problems that affect the accuracy of the immersion corrosion test. [0003] In the experiment, it is inevitable that the sample needs to be in contact with other materials during the placement process. Once in contact, a gap will inevitably be formed at the contact site. The "ar...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N17/00B25B11/00
CPCB25B11/00G01N17/00
Inventor 吴玮巍周庆军王炜钱伟方张仁彪闫博王治宇
Owner BAOSHAN IRON & STEEL CO LTD
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