CN102944508A - Tester for galvanic corrosion in soil medium - Google Patents

Abstract

The invention discloses a galvanic corrosion test device in soil medium, which is characterized in that each supporting rod is fixed horizontally between the face plate and the back board of the open box, including: a left rod on the same horizontal plane, The middle rod and the right rod; the left lower rod and the right lower rod which are respectively arranged with the left rod, the middle rod, and the right rod and the middle rod in an inverted "product"shape; each support rod is a concave groove along the length of the rod ; In the concave through grooves of each support rod, there are flashboards respectively, and the flashboards have scale marks along the length direction of the concave through grooves, and each slot is set in parallel according to the scale value; the upright sample is inserted in the In the slots on the corresponding scale value on the middle board of the left side bar, the middle bar and the left lower bar; The invention can accurately obtain the test results of galvanic corrosion.

Description

Galvanic corrosion test device in soil medium

technical field

The invention relates to a test device for studying galvanic corrosion between any two different metal materials in soil medium under a laboratory environment.

Background technique

The grounding grid is buried in the soil of the substation and has the functions of lightning protection and grounding leakage. During its use, in order to avoid corrosion caused by environmental factors and prolong its service life, it is usually better to choose a grounding grid with better corrosion resistance. metal or alloy material. However, if there is a potential difference between the selected metal material and other metal equipment in the substation, then with the intervention of corrosive media such as air, moisture, etc., contact corrosion is likely to occur where the grounding grid contacts other metal equipment in the substation That is, galvanic corrosion. Galvanic corrosion will accelerate the loss of the anode material (the metal material with the lower potential among the two metal materials in contact), which will bring serious hidden dangers to the safe operation of the substation. Therefore, the study of galvanic corrosion of different metals in the soil environment is of great significance for preventing material loss, optimizing material selection and long-term safe operation of substations. At present, in the laboratory environment, the general method of galvanic corrosion test is: first weld the wire to the test piece, then seal and fix the welding place with epoxy resin, and control the vertical relative position and distance of the sample by hanging the wire . When this method uses weight loss to calculate the corrosion rate, the epoxy resin is difficult to remove, which affects the calculation results, and it is difficult to accurately control the vertical relative position and spacing between the samples only through a single wire, which increases the instability of the test.

Contents of the invention

The purpose of the present invention is to avoid the disadvantages of the above-mentioned prior art, and to provide a galvanic couple in soil medium that is simple to operate, can accurately control the vertical relative position between samples, and can easily and quickly adjust the distance between samples according to the test requirements. Corrosion test device to accurately obtain galvanic corrosion test results.

The present invention adopts following technical scheme for solving technical problems:

The structural characteristics of the galvanic corrosion test device in the soil medium of the present invention are to set:

A rectangular open box, each support bar is fixed horizontally between the panel and the back plate of the open box, including: the left bar, the middle bar and the right bar on the same horizontal plane; and The left lower bar and the middle bar are arranged in an inverted "pin" shape; the right lower bar is arranged in an inverted "pin" shape with the right side bar and the middle bar; the left bar, right bar, The left and right lower rods are concave through grooves along the length of the rods; the concave through grooves of the left rod face to the right, and the concave through grooves of the right rod face to the left; the concave through grooves of the left and right lower rods The notch is upward; the cross-section of the middle rod is "I" type, and it is two concave grooves on the left and right back to back along the length direction of the rod;

Inserting boards are respectively arranged in the concave through grooves of the support rods, and the inserting plates have scale marks along the length direction of the concave through grooves, and each slot is arranged in parallel according to the scale value;

Take the left bar, middle bar and left lower bar as a unit, and insert the upright test pieces into the slots on the corresponding scale values on the left bar, middle bar and left lower bar mid-board;

With the right side rod, middle rod and right lower rod as a unit, the upright test pieces are inserted into the slots on the corresponding scale values on the right side rod, middle rod and right lower rod middle plate.

The structural feature of the galvanic corrosion test device in the soil medium of the present invention is also that: on the left side bar, the right side bar, the left lower bar and the right lower bar, fastening bolts are arranged at the groove bottom of the concave through groove, with the described Fastening bolts fix the position of the plugboard in the concave through groove.

Compared with the prior art, the beneficial effects of the present invention are reflected in:

1. The present invention arranges the support rods in an inverted "product" shape, and utilizes the effective positioning of the inserting plate with scales to conveniently adjust and accurately read the distance between the test pieces, and can also accurately control the position of the test pieces to ensure Vertical relative to the plane of the test piece.

2. The present invention is easy to operate, and does not require complex test piece packaging and wire fixing processes before the test. It only needs to insert the polished test piece into the slot; after the test is over, directly pull out the test piece from the slot, and carry out The weightless corrosion rate can be calculated by simple surface treatment, and the test results are highly accurate and reproducible.

3. The test environment of the present invention is diversified, not limited to the soil medium, and other media can be filled in the device container according to the test requirements to realize the galvanic corrosion test in different environments.

Description of drawings

Fig. 1 is a structural representation of the present invention;

Fig. 2 is a schematic diagram of the structure of the plugboard in the present invention;

Labels in the figure: 11 left side rod; 12 middle rod; 13 right side rod; 14 left lower rod; 15 right lower rod; 3 fastening bolts; plate.

Detailed ways

Referring to Fig. 1 and Fig. 2, the structure of the galvanic corrosion test device in the soil medium in the present embodiment is set as follows:

A rectangular open box 5, between the panel 51 and the back plate 52 of the open box 5, each support bar is fixed horizontally, including: the left side bar 11, the middle bar 12 and the right side bar on the same horizontal plane. Side bar 13; Left lower bar 14 with left side bar 11 and middle bar 12 being inverted "product" type arrangement; Right lower bar 15 with right side bar 13 and middle bar 12 being inverted "product" type arrangement.

As shown in Figure 1, the left side rod 11, the right side rod 13, the left lower rod 14 and the right lower rod 15 are concave through grooves along the rod length direction; The concave through groove notch of rod 13 faces left; the concave through groove notch of left lower rod 14 and right lower rod 15 is upward; Concave groove;

As shown in Fig. 2, a flashboard 4 is respectively arranged in the concave through groove of each support rod, and the flashboard 4 has a scale mark along the length direction of the concave through groove, and each slot 41 is arranged in parallel according to the scale value;

In the specific implementation, with the left side bar 11, the middle bar 12 and the left lower bar 14 as a unit, the upright test piece is inserted into the slot on the corresponding scale value on the left side bar, the middle bar and the middle plate of the left lower bar; It also includes the right side bar 13, the middle bar 12 and the lower right bar 15 as a unit, and the upright test piece is inserted in the slot on the corresponding scale value on the right side bar, the middle bar and the lower right bar middle plate.

In order to firmly position the test piece, on the left side bar, right side bar, left lower bar and right lower bar, fastening bolts 3 are arranged at the bottom of the concave through groove, and the fastening bolts 3 fix the insert plate 4 in the concave through groove position, and then locate the test piece.

In the specific implementation, according to the test requirements, the open box 5 is set to be a rectangular glass box, the length between the panel 51 and the back plate 52 is 50cm, and the width and length of the open box are 40cm; The distance between them is about 20cm, the middle pole is located between the left pole and the right pole; the distance between the left lower pole and the right lower pole is about 10cm;

The slots on the plugboards are evenly distributed at intervals of 1cm, the plugboards in each support rod have the same structure, and the scale marks and slot distribution are also the same.

By inserting the test pieces into the slots with corresponding scale values, the present invention not only ensures the accuracy of the distance between the test pieces, but also precisely fixes the position of the galvanic couple test pieces, which meets the requirement that the planes of the test pieces are vertically opposite, completely The accuracy and reproducibility of the test results are guaranteed. The setting of the fastening bolt 3 can also satisfy the fixing of the galvanic couple test pieces of different sizes. During the experiment, after the insertion and fastening of the test pieces are completed, the open box is filled with soil, and the conduction is conducted through the wire clamp. The galvanic couple test piece can be tested.

Claims (2)

1. experiment device for couple corrosion in the soil media is characterized in that arranging:

One rectangular open top container (5), between the panel (51) of described open top container and backboard (52), be level and be fixedly installed each root support bar, comprising: be in left side bar (11), intermediate bar (12) and right-hand rod (13) on the same level face; Be down the lower-left bar (14) that " product " type is arranged with described left side bar (11) and intermediate bar (12); Be down the bottom right bar (15) that " product " type is arranged with described right-hand rod (13) and intermediate bar (12); Described left side bar, right-hand rod, lower-left bar and bottom right bar are concave groove along the bar length direction; Wherein the left side bar the concave groove notch to the right, the concave groove notch of right-hand rod is left; The concave groove notch of lower-left bar and bottom right bar upwards; The transversal section of described intermediate bar (12) is " worker " type, its along the bar length direction be back-to-back about two concave grooves;

In the concave groove of described each root support bar, be respectively arranged with plate (4), described plate along on the length direction of concave groove with scale mark, and by scale value each slot (41) that be arranged in parallel;

Take left side bar, intermediate bar and lower-left bar as a unit, be upright test piece and be inserted on left side bar, intermediate bar and the lower-left bar centerboard in the slot on the corresponding scale value;

Take right-hand rod, intermediate bar and bottom right bar as a unit, be upright test piece and be inserted on right-hand rod, intermediate bar and the bottom right bar centerboard in the slot on the corresponding scale value.

2. experiment device for couple corrosion in the soil media according to claim 1, it is characterized in that on described left side bar, right-hand rod, lower-left bar and bottom right bar, the trench bottom that is positioned at concave groove arranges fastening bolt (3), with the position of described fastening bolt (3) fixing insertion in concave groove.

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