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Device and method for measuring corrosion behavior of active metal surface

A measuring device, active metal technology, applied in the field of corrosion measurement, active metal corrosion measurement

Active Publication Date: 2020-12-15
MATERIAL INST OF CHINA ACADEMY OF ENG PHYSICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a device and method for measuring the corrosion behavior of the active metal surface in view of the problem that the thickness and roughness of the sample are relatively high when the PVT method is used to measure active metals such as lanthanides and actinides.

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  • Device and method for measuring corrosion behavior of active metal surface

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0075] 1. Preparation of samples and tooling: Process the depleted uranium sample into a disc with a diameter slightly smaller than that of the sample sleeve; then process a stainless steel gasket with the same diameter as the sample. The sum of the thickness of the gasket and the sample is greater than the height of the sample sleeve by 1mm.

[0076] 2. Sample installation: the upper connecting piece is turned upside down so that the sapphire glass observation window faces downward; the sample sleeve is placed in the second groove in the center of the upper connecting piece, and the indium wire sealing ring, sample, gasket. Install the oxygen-free copper gasket on the sealing edge of the upper connecting piece, then install the lower connecting piece, and tighten the bolts so that the space between the upper connecting piece and the lower connecting piece is sealed by the oxygen-free copper gasket. Then, turn on the vacuum pump and the vacuum valve in turn, evacuate to 2 Pa,...

Embodiment 2

[0080] 1. Preparation of samples and tooling: Process the depleted uranium sample with laser nitriding on the upper surface into a disc with a diameter slightly smaller than the sample sleeve; then process the stainless steel gasket with the same diameter as the sample. The sum of the thickness of the gasket and the sample is greater than the height of the sample sleeve by 1mm.

[0081] 2. Sample installation: the upper connecting piece is turned upside down so that the sapphire glass observation window faces downward; the sample sleeve is placed in the second groove in the center of the upper connecting piece, and the indium wire sealing ring, sample, The spacer, with the upper surface of the sample (laser nitrided surface) facing down, is pressed against the indium wire seal. Install the oxygen-free copper gasket on the sealing edge of the upper connecting piece, then install the lower connecting piece, and tighten the bolts so that the space between the upper connecting pie...

Embodiment 3

[0085] 1. Preparation of sample and tooling: Process the depleted uranium sample whose upper surface is plasma-nitrided into a disc with a diameter slightly smaller than the sample sleeve; then process a stainless steel gasket with the same diameter as the sample. The sum of the thickness of the gasket and the sample is greater than the height of the sample sleeve by 1mm.

[0086] 2. Sample installation: the upper connecting piece is turned upside down so that the sapphire glass observation window faces downward; the sample sleeve is placed in the second groove in the center of the upper connecting piece, and the indium wire sealing ring, sample, The gasket, with the upper surface of the sample (nitrided surface) facing down, is pressed against the indium wire seal. Install the oxygen-free copper gasket on the sealing edge of the upper connecting piece, then install the lower connecting piece, and tighten the bolts so that the space between the upper connecting piece and the l...

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Abstract

The invention discloses a measuring device and a method for corrosion behaviors of active metal surfaces, and aims to solve the problem that the thickness and the roughness of samples are relatively high when active metals such as the lanthanide series and the actinide series are measured by adopting a PVT (Process Verification Test) method. According to the measuring device and method for corrosion behaviors of active metal surfaces, only a certain surface of the active metal sample is in contact with corrosive gas by adopting indium wires to seal off other surfaces of samples, and then corrosion assessments such as hydrogenation, oxidation, and the like of active metal surfaces are carried out. Compared with the prior art, the measuring device and method for corrosion behaviors of activemetal surfaces can realize the corrosion assessments of water vapor, hydrogen, and oxygen, and can only examine a local area of the surface, and eliminate influences of other surfaces and edge defects. Meanwhile, the measuring device and method for corrosion behaviors of active metal surfaces also have the advantages that the thickness of the sample can be thinner, and the pressure borne by the sample can be larger; the requirement on the surface roughness of the sample is relatively low, and general machined samples can meet the requirements; and temperature unevenness can be effectively avoided. In addition, the measuring device can judge the degree of corrosion reaction, and automatically terminate the reaction based on the improvement of the structure.

Description

technical field [0001] The invention relates to the field of corrosion measurement, in particular to the field of corrosion measurement of active metals, in particular to a device and method for measuring the corrosion behavior of active metal surfaces. This application provides a metal surface corrosion measurement device and method, which uses indium wire to seal a certain surface of a metal sample, and excludes other surfaces for corrosion assessment such as hydrogenation and oxidation, and provides an assessment method based on the device. By adopting the application, the corrosion performance of a certain surface of a sample can be conveniently inspected, and the corrosion testing technology is provided for the research on anti-corrosion modification technology of active metal materials, which has high application value. Background technique [0002] Metals such as lanthanides and actinides have important uses in civil and defense industries. However, these metals have...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N17/00G01M3/26
CPCG01M3/26G01N17/006
Inventor 张永彬刘柯钊陈志磊伏晓国胡殷李赣钟火平
Owner MATERIAL INST OF CHINA ACADEMY OF ENG PHYSICS