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Crevice corrosion experiment device and method capable of regulating and controlling size of crevice in situ in real time

A real-time control, crevice corrosion technology, applied in measuring devices, weather resistance/light resistance/corrosion resistance, instruments, etc., can solve the problem that the development of crevice corrosion cannot be truly reflected in real time, the width and coverage area of ​​the crevice are fixed, and it is inconvenient to observe. Electrode surface corrosion development and other issues, to achieve the effect of accurate and reliable experimental results, scientific and rigorous experimental process, and convenient use

Active Publication Date: 2020-06-19
INST OF OCEANOLOGY - CHINESE ACAD OF SCI +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The present invention proposes a crevice corrosion experimental device and method capable of in-situ and real-time regulation of the crevice size, aiming at solving the problem of constant gap width and coverage area between the working electrode and the pres

Method used

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  • Crevice corrosion experiment device and method capable of regulating and controlling size of crevice in situ in real time
  • Crevice corrosion experiment device and method capable of regulating and controlling size of crevice in situ in real time
  • Crevice corrosion experiment device and method capable of regulating and controlling size of crevice in situ in real time

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Embodiment 1

[0032] See attached figure 1 , attached figure 2 , attached image 3 And attached Figure 4 , what the present invention provides is a kind of crevice corrosion experimental device that can regulate the gap size in situ and in real time. This experimental device includes an experimental tank 10, a cover plate 20 and a range finder 40. The experimental device also includes an image acquisition instrument 50; The top of tank 10 has an open end, is provided with electrolyte solution in experiment tank 10, is provided with working electrode 33, reference electrode 34 and counter electrode 35 in electrolyte solution, and working electrode 33 enters electrolyte solution from the bottom of test tank 10, works Electrode 33, reference electrode 34 and counter electrode 35 are all connected with electrochemical workstation by wire, Figure 4 For the sake of brief introduction, the electrochemical workstation is not shown; the working electrode 33 is used to simulate the metal templa...

Embodiment 2

[0038] A crevice corrosion experimental method capable of in-situ and real-time regulation of the crevice size of the present invention comprises the following steps:

[0039] 1) Take the experimental tank 10, and install the working electrode 33, the reference electrode 34 and the counter electrode 35 in the experimental tank 10. In this embodiment, the working electrode 33 is a wire bundle electrode, and the wire bundle electrode packaged in advance is polished to 2000# , the diameter of the wire beam electrode is 40mm, and the diameter of the mounting hole at the bottom of the test tank 10 is also 40mm. The wire beam electrode is inserted into the test tank 10 through the mounting hole, and the wire at the bottom of the wire beam electrode is exposed, which is connected to the wire beam electrode potential current scanner. Interface, wire beam electrode material is U71Mn track steel, 10×10,

[0040] 2) Cover plate 20 is installed in the test tank 10. Cover plate 20 is a g...

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Abstract

The invention provides a crevice corrosion experiment device and method capable of regulating and controlling the size of a crevice in real time in situ. The device comprises an experiment tank, a cover plate and a range finder, the top of the experiment tank is provided with an open end, an electrolyte is arranged in the experiment tank, and a working electrode, a reference electrode and a counter electrode are arranged in the electrolyte; the cover plate can do reciprocating rectilinear motion in the vertical direction and can also do reciprocating rectilinear motion in the horizontal direction. The ranger finder is used for measuring the distance of the cover plate doing reciprocating rectilinear motion in the vertical direction. The gap width is accurately controlled through reciprocating motion of the cover plate in the vertical direction, and real-time regulation and control of the gap width are further achieved; according to the invention, the development condition of crevice corrosion can be directly observed and recorded; the experimental device simulates crevice corrosion under the working condition of crevice area change through reciprocating motion of the cover plate inthe horizontal direction, is convenient to use and scientific and rigorous in experimental result, truly reflects the development situation of crevice corrosion in real time, and has important academic values for enriching and developing crevice corrosion related research.

Description

technical field [0001] The invention relates to the technical field of material corrosion, in particular to a crevice corrosion experimental device and method capable of in situ and real-time regulation of crevice size. Background technique [0002] Metal materials are widely used in industrial and agricultural production, and most metal materials are easily damaged by corrosion under certain conditions. The research on corrosion and protection of metal materials has very important practical significance. Most of the corrosion damage of metal materials is electrochemical corrosion. The corrosion of this metal material can be divided into two categories: general corrosion and local corrosion according to the corrosion form; in terms of the damage degree of corrosion, the corrosion amount of local corrosion of metal is often much smaller than that of general corrosion. The damage to the strength of the metal and the overall structural integrity of the metal product is much g...

Claims

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Application Information

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IPC IPC(8): G01N17/02
CPCG01N17/02
Inventor 徐玮辰邓羽张杰李言涛王正泉孙丛涛杨黎晖麻福斌
Owner INST OF OCEANOLOGY - CHINESE ACAD OF SCI
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