KR102574093B1 - Realtime device for observing corrosion behavior of metals - Google Patents

Abstract

Embodiments of the present invention relate to a real-time monitoring device for metal corrosion behavior. According to one embodiment of the present invention, a metal sample and a corrosion solution for corroding the metal sample are accommodated therein, and a window is formed on the upper side, a corrosion behavior observation cell (cell); An optical unit including a long focal length objective lens to observe the corrosion behavior of the metal sample in real time through the window; a digital camera for recording an image of the corrosion behavior of the metal sample through the optic; and a stage for moving the corrosion behavior observation cell.

Description

Metal corrosion behavior real-time observation device {REALTIME DEVICE FOR OBSERVING CORROSION BEHAVIOR OF METALS}

Embodiments of the present invention relate to a real-time monitoring device for metal corrosion behavior.

In order to secure the stability of products using metals, research on the corrosion behavior of metals can be an important part. In order to measure the corrosion behavior of metal, it is generally based on a method of measuring the electrochemical behavior of the metal microstructure occurring in an aqueous solution with a potentiometer.

However, knowing where metal corrosion occurs and how it propagates is one of the important factors in life evaluation of metal materials. To do this, it is necessary to obtain visual data on the corrosion behavior of metals. Since most of the corrosion of metal occurs in an environment where water and oxygen exist, the approach to metal corrosion behavior so far is mainly to take the metal out of the aqueous solution before and after immersion in the aqueous solution and observe the microstructure, from which the corrosion initiation and propagation process It was an inference method. However, with such an ex situ inference method of metal corrosion, information on the initiation and propagation process of corrosion cannot be clearly known, and only the process can be inferred.

To compensate for this, a system for observing corrosion behavior by directly immersing an objective lens in an aqueous solution (immersion lens) has been introduced in Japan. There was a limit to observing the corrosion behavior resulting from the metal microstructure of the size.

"A Microelectrochemical System for In Situ High-Resolution Optical Microscopy: Morphological Characteristics of Pitting at MnS Inclusion in Stainless Steel", January 2012, Journal of The Electrochemical Society, 159(8):C341-C350

Embodiments of the present invention are to solve the above problems, to provide a metal corrosion behavior real-time observation device capable of observing the corrosion behavior of metal at high magnification.

In addition, embodiments of the present invention are to provide a metal corrosion behavior real-time observation device capable of observing the corrosion behavior of the metal without immersing the lens in the aqueous solution.

According to one embodiment of the present invention, a metal sample and a corrosion solution for corroding the metal sample are accommodated therein, and a window is formed on the upper side, a corrosion behavior observation cell (cell); An optical unit including a long focal length objective lens to observe the corrosion behavior of the metal sample in real time through the window; a digital camera for recording an image of the corrosion behavior of the metal sample through the optic; and a stage for moving the corrosion behavior observation cell.

The method may further include a potentiometer for measuring electrochemical characteristics of the metal sample due to corrosion, and the potentiometer may be electrically connected to a reference electrode formed inside the corrosion behavior observation cell and the metal.

The corrosion behavior observation cell may include a first member seated on the stage; a second member coupled to the first member and having a mounting hole in which the metal sample is mounted, and receiving the corrosion solution therein; and a third member on which the window is formed.

A plurality of floating members for floating the second member to a certain height may be formed on the first member.

The plurality of floating members may be formed at every corner inside the first member.

A distance determining member for determining a distance between the metal sample and the long focal length objective lens may be formed around the mounting hole in the second member.

A sealing member in close contact with the metal sample may be formed in the mounting hole.

The second member may include a bottom surface where the mounting hole is formed and a sidewall surrounding the bottom surface, and the corrosion solution may be accommodated in a space partitioned by the bottom surface and the sidewall.

According to embodiments of the present invention, a metal corrosion behavior real-time observation device capable of observing the corrosion behavior of metal at high magnification is provided.

In addition, according to embodiments of the present invention, a metal corrosion behavior real-time observation device capable of observing the corrosion behavior of a metal without immersing a lens in an aqueous solution is provided.

1 is a view showing a metal corrosion behavior real-time observation device according to an embodiment of the present invention
FIG. 2 is a detailed view of a digital camera and an optical unit in FIG. 1; FIG.
3 is a view showing the configuration of a corrosion behavior observation cell according to an embodiment of the present invention

Hereinafter, specific embodiments will be described with reference to the drawings. The detailed descriptions that follow are provided to provide a comprehensive understanding of the methods, devices and/or systems described herein. However, this is only an example and disclosed embodiments are not limited thereto.

In describing the embodiments, if it is determined that a detailed description of related known technologies may unnecessarily obscure the gist of the disclosed embodiments, the detailed description will be omitted. In addition, terms to be described later are terms defined in consideration of functions in the disclosed embodiments, which may vary according to intentions or customs of users or operators. Therefore, the definition should be made based on the contents throughout this specification. Terminology used in the detailed description is only for describing the embodiments and should in no way be limiting. Unless expressly used otherwise, singular forms of expression include plural forms. In this description, expressions such as "comprising" or "comprising" are intended to indicate any characteristic, number, step, operation, element, portion or combination thereof, one or more other than those described. It should not be construed to exclude the existence or possibility of any other feature, number, step, operation, element, part or combination thereof.

1 is a diagram showing an apparatus 100 for real-time observing metal corrosion behavior according to an embodiment of the present invention.

Referring to FIG. 1 , the metal corrosion behavior real-time observation device 100 may include a digital camera 110, an optical unit 120, a corrosion behavior observation cell 150, and a stage 160 from the top. . The digital camera 110 may serve to record real-time images of the corrosion behavior of the metal and send them to the computer 130 . The optical unit 120 is for observing the corrosion behavior of metal in real time, and may include a long focal length objective lens therein. A long focal length objective lens is an objective lens having a longer focal length than a general lens, and will be described later.

The corrosion behavior observation cell 150 may accommodate a metal sample (M) to be observed by being corroded therein and a corrosion solution (S) for corroding the metal sample (M), and a window for observing corrosion behavior ( A window is formed on the upper side so that the metal sample M inside can be observed through the optical unit 120 .

It may be necessary to visually image the corrosion behavior of the metal sample M, observe the real-time corrosion image, and at the same time check the change in the electrochemical properties of the metal sample M according to the corrosion to confirm the degree of corrosion. To this end, a potentiometer 140 for measuring changes in electrochemical properties of the metal sample may be separately formed. The reference electrode E1, the auxiliary electrode E2, and the metal sample M may be electrically connected (L1, L2, L3) to the potentiometer 140.

FIG. 2 is a diagram showing the digital camera 110 and the optical unit 120 in FIG. 1 in detail.

Referring to FIG. 2, the optical unit 120 includes an eyepiece lens 121, a condensing lens 123 condensing light by the illumination 122, and reflecting light from the condensing lens 123 toward the metal sample M. It may include a reflector 124 and a long focus objective lens 125 for observing the metal sample (M) from the side of the metal sample (M).

The eye lens 121 may be located on the side of the digital camera 110 and send a real-time image of the corrosion behavior of the metal sample M to the side of the digital camera 110. Illumination 122 may serve to provide sufficient light to more clearly image the corrosion behavior of the metal sample M. The condensing lens 123 serves to collect the light from the illumination 122 and send it to the reflector 124, so that stronger light can be sent to the metal sample M. In addition, the condensing lens 123 may serve to improve resolving power in the long focal length objective lens 125 .

The long-focus objective lens 125 may be a lens having a longer focal length than a general objective lens. Through this, even if the magnification of the optical unit 200 is increased in order to observe the corrosion behavior of the metal sample M, the distance between the metal sample M and the long focal objective lens 125 can be widened to a certain distance or more, so that the optical unit Even if the 200 is not immersed in the corrosion solution (S), the optical unit 200 can check the corrosion behavior of the metal sample (M). Here, the focal length of the long-focus objective lens 125 may be 8 to 9 mm, and the optical unit 200 may acquire a high-magnification image of up to 1000 times. Through this, it is possible to observe corrosion behavior in a sub-micrometer region of the metal sample M.

3 is a diagram showing the configuration of a corrosion behavior observation cell 150 according to an embodiment of the present invention.

Referring to FIG. 3 , the corrosion behavior observation cell 150 may include a first member 151 , a second member 153 , and a third member 155 .

The first member 151 may be a member seated on the stage 160, and the second member 153 may be mounted therein. The second member 153 is coupled to the first member 151 and a mounting hole 153b is formed so that the metal sample M can be mounted in the mounting hole 153b. In addition, since the second member 153 can accommodate the corrosion solution S, the corrosion behavior of the metal sample M by the corrosion solution S can occur.

A window 155a is formed at the center of the third member 155 so that the metal sample M therein can be observed through the optical unit 120 .

More specifically, the first member 151 may provide a space in which the second member 153 can be mounted. In addition, a plurality of floating members 151a may be formed in the first member 151 to float the second member 153 at a certain height from the bottom surface 151b of the first member 151 . A plurality of floating members 151a are formed at each of the four corners of the first member 151 to stably float the second member 153. The reason for floating the second member 153 from the underside 151b of the first member 151 is that the corrosion solution S contained in the second member 153 overflows in the second member 153. This may be to prevent the corrosion solution S from overflowing to the outside of the corrosion behavior observation cell 150 by flowing into the space 152 formed between the bottom surface 151b of the member 151 and the second member 153. there is.

A distance determining member 153a may be formed on the second member 153 to maintain a constant distance between the metal sample M and the long focal length objective lens 125 of the optical unit 120 . The distance determining member 153a may be formed around the mounting hole 153b, and may be formed in plurality to maintain the metal sample M horizontally. In addition, a ring-shaped sealing member 153c is disposed inside the mounting hole 153b so that when the metal sample M is mounted in the mounting hole 153b, the mounting hole 153b and the metal sample M ) can close the liver.

The mounting hole 153b of the second member 153 may be formed at the center of the bottom surface 154a, and sidewalls 154b may be formed along the circumference of the bottom surface 154a. Thus, the space 154 is partitioned by the bottom surface 154a and the side wall 154b, and the corrosion solution S can be accommodated in the space 154. As a result, the metal sample (M) is kept submerged in the corrosion solution (S), so that the corrosion behavior of the metal sample (M) can occur.

A window 155a made of a transparent material is formed in the center of the third member 155 to expose the metal sample M therein to the outside.

Although representative embodiments of the present invention have been described in detail above, those skilled in the art will understand that various modifications are possible to the above-described embodiments without departing from the scope of the present invention. . Therefore, the scope of the present invention should not be limited to the described embodiments and should not be defined, and should be defined by not only the claims to be described later, but also those equivalent to these claims.

100: Metal corrosion behavior real-time observation device
110: digital camera
120: optics
121: alternative lens
122: lighting
123: condensing lens
124: reflector
125: long focal objective lens
130: computer
140: potentiometer
150: corrosion behavior observation cell
151: first member
151a: floating member
151b: bottom
152: space
153: second member
153a: distance determining member
153b: mounting hole
153c: sealing member
154: space
154a: bottom
154b: side wall
155: third member
155a: window
160: stage

Claims (8)

A corrosion behavior observation cell that accommodates a metal sample and a corrosion solution corroding the metal sample therein, and has a window formed thereon;
An optical unit including a long focal length objective lens to observe the corrosion behavior of the metal sample in real time through the window;
a digital camera for recording an image of the corrosion behavior of the metal sample through the optic; and
Including; a stage for moving the corrosion behavior observation cell,
The corrosion behavior observation cell,
a first member seated on the stage;
Inserted into the first member, a mounting hole in which the metal sample is mounted and a distance determining member for limiting the mounting height in the mounting hole of the metal sample are formed around the mounting hole, and the corrosion solution is accommodated therein a second member; and
The window is formed and a third member positioned on the first member and the second member; further comprising a metal corrosion behavior real-time observation device.
The method of claim 1,
Further comprising a potentiometer for measuring a change in electrochemical properties due to corrosion of the metal sample,
The potentiometer is electrically connected to the metal and the reference electrode formed inside the corrosion behavior observation cell, metal corrosion behavior real-time observation device.
delete The method of claim 1,
Wherein the first member is formed with a plurality of floating members for floating the second member to a certain height, metal corrosion behavior real-time observation device.
The method of claim 4,
The plurality of floating members are formed at every corner inside the first member, metal corrosion behavior real-time observation device.
The method of claim 1,
The distance determining member determines the distance between the metal sample and the long focal length objective lens, metal corrosion behavior real-time observation device.
The method of claim 1,
Metal corrosion behavior real-time observation device in which a sealing member in close contact with the metal sample is formed in the mounting hole.
The method of claim 1,
In the second member,
A bottom surface in which the mounting hole is formed and a side wall surrounding the bottom surface are formed,
Metal corrosion behavior real-time observation device in which the corrosion solution is accommodated in the space partitioned by the bottom surface and the side wall.