Splicing type bulkhead plate

Abstract

The utility model belongs to the technical field of ship trunk, and discloses a splicing type bulkhead plate which comprises a plurality of middle splicing plates and middle connecting pieces, the middle splicing plates can be spliced in sequence in the length direction of the middle splicing plates, first middle clamping parts are arranged at the two ends of each middle splicing plate in the length direction of the middle splicing plates, and during splicing, the middle connecting pieces are connected with the first middle clamping parts. The first middle clamping parts of every two adjacent middle splice plates can be clamped and matched with each other; and the middle connecting pieces are used for connecting two adjacent middle splice plates. The side wall of the trunk is formed by sequentially splicing the multiple middle splicing plates in the length direction of the middle splicing plates, an operator can conveniently take out one middle splicing plate so as to conveniently observe the internal condition of the trunk, after a trunk test is completed, the middle splicing plate is spliced with the adjacent middle splicing plate, and then the trunk can be closed, and the operation is convenient. And a welding connection mode is replaced by splicing, so that the mounting and dismounting efficiency can be improved, and the connection strength and corrosion resistance of joints can be ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of ship enclosures, in particular to a spliced ​​bulkhead plate. Background Art

[0002] There are usually many wells sealed on six sides inside the ship. During the well test phase, it is necessary to open an observation hole on the bulkhead of the well to observe the situation inside the well. After the well test is completed, the operator needs to seal the observation hole by welding outside the well. This sealing method can only perform single-sided welding on the outer wall of the well, but cannot weld the inner wall of the well, and the welds on the inner wall of the well cannot be painted, resulting in low connection strength at the connection of the observation hole and easy corrosion.

[0003] Therefore, it is urgent to propose a spliced ​​bulkhead plate to solve the above problems. Utility Model Content

[0004] The utility model aims to provide a spliced ​​bulkhead plate, which can be connected to form the side wall of the enclosure by splicing, is easy to install and disassemble, replaces the welding connection method, and can ensure the connection strength and corrosion resistance of the connection.

[0005] To achieve this purpose, the utility model adopts the following technical solutions:

[0006] A spliced ​​bulkhead panel, comprising:

[0007] A plurality of intermediate splicing plates can be spliced ​​in sequence along the length direction thereof, and each of the intermediate splicing plates is provided with a first intermediate clamping portion at both ends along the length direction thereof, and when splicing, the first intermediate clamping portions of two adjacent intermediate splicing plates can be mutually clamped and matched;

[0008] An intermediate connecting piece is used to connect two adjacent intermediate splicing plates.

[0009] Furthermore, each of the first intermediate clamping parts is provided with a connecting groove, and two ends of the intermediate connecting member are respectively inserted into the connecting grooves of two adjacent intermediate splicing plates.

[0010] Furthermore, the spliced ​​bulkhead panel also includes a corner splicing plate group, which includes two corner splicing plates spliced ​​at 90°, and each of the corner splicing plates is respectively provided with a second intermediate clamping portion and a corner clamping portion at both ends along its length direction, and the two corner splicing plates are clamped together through the corner clamping portions, and the second intermediate clamping portion can be clamped together with the first intermediate clamping portion.

[0011] Furthermore, the middle splicing plate includes a middle splicing body and a first step centrally symmetrically connected to both ends of the middle splicing body along its length direction, and the end surface of the middle splicing body and the first step arranged on the end surface cooperate to form the first middle clamping portion.

[0012] Furthermore, the corner splicing plate includes a corner splicing body and a second step and a third step which are centrally symmetrically connected to the corner splicing body at both ends along its length direction. One side end surface of the corner splicing body and the second step arranged on the end surface cooperate to form the corner clamping portion, and the other side end surface of the corner splicing body and the third step arranged on the end surface cooperate to form the second intermediate clamping portion.

[0013] Furthermore, the widths of the middle splicing plate and the corner splicing plate are equal and are both T, and the length of the first step, the width of the first step, the length of the second step and the width of the second step are all T / 2.

[0014] Further, the spliced ​​bulkhead panel further comprises a corner connection assembly, wherein the corner connection assembly comprises a first corner connection piece, wherein the first corner connection piece is L-shaped, and the L-shaped first corner connection piece can wrap around and be connected to the outer corners of the two spliced ​​corner splicing panels; and / or

[0015] The corner connection assembly comprises a second corner connection piece, which is L-shaped. The L-shaped second corner connection piece can be fitted and connected to the inner corner of the two corner splicing panels that are spliced.

[0016] Further, the spliced ​​bulkhead plate further comprises an end connection assembly, the end connection assembly comprises a first end connection piece, the first end connection piece is U-shaped, the inner side of the U-shaped first end connection piece is wrapped and connected to one end of the middle splicing plate or the corner splicing plate in the height direction, and the outer side of the U-shaped first end connection piece is fitted and connected to the hull, and / or

[0017] The end connection assembly includes a second end connection piece, which is L-shaped, one end of the L-shaped second end connection piece is fitted and connected to the hull, and the other end is fitted and connected to the side of the middle splicing plate or the corner splicing plate.

[0018] Furthermore, a fireproof layer is embedded in the middle splicing plate and the corner splicing plate.

[0019] Furthermore, outer surfaces of the middle splicing plate and the corner splicing plate are coated with an anti-corrosion coating.

[0020] Beneficial effects of the utility model:

[0021] The utility model provides a spliced ​​bulkhead plate, including a plurality of intermediate splicing plates and an intermediate connector. The plurality of intermediate splicing plates can be spliced ​​in sequence along the length direction thereof, and each intermediate splicing plate is provided with a first intermediate clamping portion at both ends along the length direction thereof, and when splicing, the first intermediate clamping portions of two adjacent intermediate splicing plates can be mutually clamped and matched; the intermediate connector is used to connect two adjacent intermediate splicing plates. By splicing a plurality of intermediate splicing plates in sequence along the length direction thereof to form the side wall of the enclosure, an operator can conveniently take out one of the intermediate splicing plates to observe the internal situation of the enclosure. After the enclosure test is completed, the intermediate splicing plate is spliced ​​with the adjacent intermediate splicing plates to realize the closure of the enclosure. The splicing replaces the welding connection method, can improve the efficiency of installation and disassembly, and can ensure the connection strength and corrosion resistance of the connection, and can also improve the fireproof performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a top view of the enclosure formed by the spliced ​​bulkhead plate and the hull provided by the utility model;

[0023] Figure 2 It is a schematic diagram of the middle splicing plate provided by the utility model being connected to the adjacent middle splicing plates in the same direction;

[0024] Figure 3 It is a schematic diagram of a corner splicing plate assembly provided by the utility model;

[0025] Figure 4 yes Figure 1 Sectional view at A-A in the middle;

[0026] Figure 5 yes Figure 1 The structural diagram of part B;

[0027] Figure 6 yes Figure 1 Schematic diagram of the structure of part C.

[0028] In the figure:

[0029] 100. Hull;

[0030] 1. middle splicing plate; 10. first middle clamping portion; 101. connecting groove; 11. middle splicing body; 12. first step;

[0031] 2. Intermediate connecting parts;

[0032] 3. Corner splicing plate; 301. Second middle clamping part; 302. Corner clamping part; 31. Corner splicing body; 32. Second step; 33. Third step;

[0033] 4. Corner connection assembly; 41. First corner connection piece; 42. Second corner connection piece; 43. First fixing piece;

[0034] 5. end connection assembly; 51. first end connection piece; 52. second end connection piece; 53. second fixing piece;

[0035] 6. Edge splicing panels. DETAILED DESCRIPTION

[0036] The present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only the parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[0037] In the description of the present invention, unless otherwise clearly specified and limited, the terms "fixed connection", "connection" and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct fixed connection or an indirect fixed connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0038] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0039] In the description of this embodiment, the terms "upper", "lower", "right", etc., are based on the directions or positions shown in the drawings, and are only for the convenience of description and simplified operation, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation of the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0040] like Figure 1 and Figure 2As shown, this embodiment provides a spliced ​​bulkhead plate, including a plurality of intermediate splicing plates 1 and an intermediate connector 2. The plurality of intermediate splicing plates 1 can be spliced ​​in sequence along the length direction thereof. Each intermediate splicing plate 1 is provided with a first intermediate clamping portion 10 at both ends along the length direction thereof, and when splicing, the first intermediate clamping portions 10 of two adjacent intermediate splicing plates 1 can be mutually clamped and matched; the intermediate connector 2 is used to connect two adjacent intermediate splicing plates 1. By splicing a plurality of intermediate splicing plates 1 in sequence along the length direction thereof to form the side wall of the enclosure, the operator can conveniently take out one or several of the intermediate splicing plates 1 to observe the internal situation of the enclosure. After the enclosure test is completed, the intermediate splicing plate 1 is spliced ​​with the adjacent intermediate splicing plates 1 to achieve the closure of the enclosure. This embodiment adopts splicing to replace the welding connection mode, which can improve the efficiency of installation and disassembly, and can ensure the connection strength and corrosion resistance of the connection. In addition, since sparks are easily generated during welding, which causes fire hazards, the spliced ​​bulkhead plate provided by this embodiment can also improve the fireproof performance.

[0041] Specifically, the middle splicing plate 1 includes a middle splicing body 11 and a first step 12 which is centrally symmetrically connected to the middle splicing body 11 at both ends along its length direction. The end face of the middle splicing body 11 and the first step 12 arranged on the end face cooperate to form the above-mentioned first middle clamping portion 10. The first step 12 which is centrally symmetrically connected to the middle splicing body 11 at both ends along its length direction makes it unnecessary for the middle connecting plate to distinguish directions, and both ends can be clamped with the adjacent first middle clamping portions 10, which is beneficial to improving installation efficiency.

[0042] Furthermore, if Figure 2 As shown, each first intermediate clamping portion 10 is provided with a connecting groove 101, and the two ends of the intermediate connecting member 2 are respectively inserted into the connecting grooves 101 of two adjacent intermediate splicing plates 1 to achieve the connection between the two adjacent intermediate splicing plates 1. This connection method has a simple structure, can achieve efficient installation and convenient disassembly, and does not damage the intermediate splicing plates 1, so that they can be reused after being disassembled, which is beneficial to reducing production costs.

[0043] In order to further improve the connection strength, the first step 12 arranged on the end surface of the middle splicing body 11 and the part of the end surface contacting the adjacent first middle clamping part 10 are both provided with a connection groove 101, so that the clamping of two adjacent first middle clamping parts 10 is more stable.

[0044] It should be noted that if Figure 1 and Figure 3As shown, the enclosure can be formed by three hulls 100 and one spliced ​​bulkhead plate, two hulls 100 and two spliced ​​bulkhead plates, one hull 100 and three spliced ​​bulkhead plates, or four spliced ​​bulkhead plates. Therefore, in order to facilitate the connection of adjacent two-sided spliced ​​bulkhead plates, the spliced ​​bulkhead plates also include a corner splicing plate group, which includes two corner splicing plates 3 spliced ​​at 90 degrees, and each corner splicing plate 3 is respectively provided with a second middle clamping portion 301 and a corner clamping portion 302 at both ends along its length direction. The two corner splicing plates 3 are clamped and matched through the corner clamping portion 302, and the second middle clamping portion 301 can be clamped and matched with the first middle clamping portion 10, so as to connect the adjacent two-sided spliced ​​bulkhead plates with an angle of 90 degrees.

[0045] Specifically, the corner splicing plate 3 includes a corner splicing body 31 and a second step 32 and a third step 33 which are centrally symmetrically connected to the corner splicing body 31 at both ends along its length direction. One side end face of the corner splicing body 31 and the second step 32 arranged on the end face cooperate to form the above-mentioned corner clamping portion 302. Two adjacent corner clamping portions 302 can be clamped together in directions perpendicular to each other. The other side end face of the corner splicing body 31 and the third step 33 arranged on the end face cooperate to form the above-mentioned second intermediate clamping portion 301. The second intermediate clamping portion 301 can be clamped with the adjacent first intermediate clamping portion 10 along the length direction of the corner splicing plate 3 and the intermediate splicing plate 1.

[0046] Furthermore, the widths of the middle splicing plate 1 and the corner splicing plate 3 are equal and are both T, and the length of the first step 12, the width of the first step 12, the length of the second step 32 and the width of the second step 32 are all T / 2, so that the first middle clamping portion 10 and the corner clamping portion 302 can be clamped in mutually perpendicular directions. Obviously, since the second step 32 and the third step 33 are centrally symmetrically connected to the two ends of the corner splicing body 31 along its length direction, the length and width of the third step 33 are both T / 2, so that after a plurality of middle splicing plates 1 and corner splicing plates 3 are connected to each other, a splicing type bulkhead plate with a smooth surface can be formed, which has a smooth and beautiful surface and is easy to install and clean.

[0047] In order to realize the connection of the corner splicing plate group, the splicing bulkhead plate also includes a corner connection assembly 4, which includes a first corner connection piece 41. The first corner connection piece 41 is L-shaped. The L-shaped first corner connection piece 41 can wrap and connect to the outer corners of the two spliced ​​corner splicing plates 3 to realize the relative fixation of the two spliced ​​corner splicing plates 3. The connection method between the first corner connection piece 41 and the corner splicing plate 3 includes but is not limited to threaded connection, bonding or welding, etc., which is not limited here.

[0048] Furthermore, the corner connection assembly 4 further includes a second corner connection piece 42, which is L-shaped and can be fitted and connected to the inner corners of the two corner splicing plates 3 to further fix the two spliced ​​corner splicing plates 3. The connection method between the second corner connection piece 42 and the corner splicing plate 3 includes, but is not limited to, threaded connection, bonding or welding, etc., which is not limited here.

[0049] In this embodiment, the corner connection assembly 4 also includes a first fixing member 43, which can be a screw or a bolt, etc. The first corner connection member 41 and the second corner connection member 42 are threadedly connected to the two spliced ​​corner splicing plates 3 through the first fixing member 43, so that the corner splicing plates 3 can be disassembled without loss and are easy to reuse.

[0050] like Figure 4 As shown, in order to prevent the spliced ​​bulkhead plate from tipping over, the spliced ​​bulkhead plate also includes an end connection assembly 5, which includes a first end connection piece 51, which is U-shaped, and the U-shaped first end connection piece 51 is wrapped and connected to one end of the middle splicing plate 1 or the corner splicing plate 3 along the height direction, and the outer side of the U-shaped first end connection piece 51 is fitted and connected to the hull 100 to achieve the connection between the middle splicing plate 1 or the corner splicing plate 3 and the hull 100, and the U-shaped first end connection piece 51 can fix the middle splicing plate 1 or the corner splicing plate 3 in the vertical direction (i.e., the height direction of the middle splicing plate 1 or the corner splicing plate 3) to prevent it from tipping over to the inside or outside of the enclosure. Among them, the connection method between the first end connection piece 51 and the middle splicing plate 1, the corner splicing plate 3 or the hull 100 includes but is not limited to threaded connection, bonding or welding, etc., which is not limited here.

[0051] Furthermore, the end connection assembly 5 includes a second end connection piece 52, which is L-shaped, and one end of the L-shaped second end connection piece 52 is fitted and connected to the hull 100, and the other end is fitted and connected to the side of the middle splicing plate 1 or the corner splicing plate 3. Since one end of the middle splicing plate 1 or the corner splicing plate 3 in the height direction is clamped in the first end connection piece 51, in order to facilitate connection, firstly, an L-shaped second end connection piece 52 is installed on the inner side of the well, and when the other end of the middle splicing plate 1 or the corner splicing plate 3 in the height direction is close to a side of the inner side of the well and abuts against the second end connection piece 52, then another second end connection piece 52 is installed on the outer side of the well. The two second end connection pieces 52 can clamp the other end of the middle splicing plate 1 or the corner splicing plate 3 in the height direction to further prevent it from tipping over. The connection method between the second end connector 52 and the middle splicing plate 1, the corner splicing plate 3 or the hull 100 includes but is not limited to threaded connection, bonding or welding, etc., which is not limited here.

[0052] In this embodiment, the end connection assembly 5 also includes a second fixing member 53, which can be a screw or a bolt, etc. The first end connection member 51 and the second end connection member 52 are threadedly connected to the middle splicing plate 1 or the corner splicing plate 3 through the second fixing member 53, so that the middle splicing plate 1 or the corner splicing plate 3 can be disassembled without loss, which is convenient for reuse.

[0053] It should be noted that if Figure 5 and Figure 6 As shown, in the actual installation process, the middle splicing plate 1 can be cut to form an edge splicing plate according to the required splicing length. After cutting, one end of the edge splicing plate along its length direction maintains a third middle clamping portion that can be clamped and matched with the first middle clamping portion 10, and the other end may be shaped into a step structure or a plane structure according to the cutting length. By using the L-shaped second end connector 52, the cut end of the edge splicing plate can be connected to the hull 100, which will not be elaborated here.

[0054] In this embodiment, the standard width of each middle splicing plate 1 and corner splicing plate 3 is 600 mm, and the standard height is 2000 mm, 2500 mm or 3000 mm. According to the actual height of the hull 100, the middle splicing plates 1 and corner splicing plates 3 of different standard heights can be selected for splicing. In other embodiments, according to the height of the hull 100, the middle splicing plates 1 and corner splicing plates 3 of standard width and standard height suitable for most application scenarios can also be set, which is not limited here.

[0055] Since the dimensions of the highly spliced ​​bulkhead panels of the middle splicing panels 1 and the corner splicing panels 3 are fixed, there may be a gap between the spliced ​​bulkhead panels and the hull 100 after splicing. Therefore, the first end connector 51 and the second end connector 52 also play a role in closing the gap between the spliced ​​bulkhead panels and the hull 100, which is beneficial to improving the flexibility and versatility of the spliced ​​bulkhead panels.

[0056] Furthermore, a fireproof layer is embedded in the middle splicing plate 1 and the corner splicing plate 3, which can improve the fireproof level of the spliced ​​bulkhead plate and improve safety. In the present embodiment, the middle splicing plate 1 and the corner splicing plate 3 are composed of two layers of galvanized steel plates and thick rock wool sandwiched between the two layers of galvanized steel plates, which can reach the A60 fireproof level. Compared with the existing fireproof method of laying insulating wool on the surface of the steel bulkhead plate, the spliced ​​bulkhead plate of the present embodiment can save installation time, simplify the installation steps, and reduce the risk of operators inhaling insulating cotton wool. According to different fireproof level requirements, the operator can choose thick rock wool or other fireproof materials of different thicknesses, which are not limited here. According to the material strength requirements, other metal plates can also be selected to assume that the fireproof material forms the middle splicing plate 1 and the corner splicing plate 3, which are not limited here.

[0057] In addition, since the environment of the hull 100 is humid, the outer surfaces of the middle splicing plate 1 and the corner splicing plate 3 are coated with an anti-corrosion coating, which can effectively prevent the spliced ​​bulkhead plate from rusting. Specifically, the anti-corrosion coating can be but is not limited to PVC coating or paint, which is not limited here.

[0058] Obviously, the above embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention, and are not intended to limit the implementation methods of the present invention. For those skilled in the art, various obvious changes, readjustments and substitutions can be made without departing from the scope of protection of the present invention. It is not necessary and impossible to list all implementation methods here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention shall be included in the scope of protection of the claims of the present invention.

Claims

1. A spliced ​​bulkhead panel, characterized in that: include: A plurality of intermediate splicing plates (1) can be spliced ​​in sequence along their length direction, each of the intermediate splicing plates (1) is provided with a first intermediate clamping portion (10) at both ends along its length direction, and when splicing, the first intermediate clamping portions (10) of two adjacent intermediate splicing plates (1) can be mutually clamped and matched; An intermediate connecting piece (2), the intermediate connecting piece (2) being used to connect two adjacent intermediate splicing plates (1).

2. The spliced ​​bulkhead panel according to claim 1, characterized in that: Each of the first intermediate clamping parts (10) is provided with a connecting groove (101), and the two ends of the intermediate connecting member (2) are respectively inserted into the connecting grooves (101) of two adjacent intermediate splicing plates (1).

3. The spliced ​​bulkhead panel according to claim 1, characterized in that: The spliced ​​bulkhead plate also includes a corner splicing plate group, which includes two corner splicing plates (3) spliced ​​at 90 degrees, each of the corner splicing plates (3) is respectively provided with a second middle clamping portion (301) and a corner clamping portion (302) at both ends along its length direction, the two corner splicing plates (3) are clamped together via the corner clamping portion (302), and the second middle clamping portion (301) can be clamped together with the first middle clamping portion (10).

4. The spliced ​​bulkhead panel according to claim 3, characterized in that: The intermediate splicing plate (1) comprises an intermediate splicing body (11) and a first step (12) centrally symmetrically connected to both ends of the intermediate splicing body (11) along its length direction; the end surface of the intermediate splicing body (11) and the first step (12) arranged on the end surface cooperate to form the first intermediate clamping portion (10).

5. The spliced ​​bulkhead panel according to claim 4, characterized in that: The corner splicing plate (3) comprises a corner splicing body and a second step and a third step (33) centrally symmetrically connected to the two ends of the corner splicing body along the length direction thereof; an end face on one side of the corner splicing body and the second step arranged on the end face cooperate to form the corner clamping portion (302); and an end face on the other side of the corner splicing body and the third step (33) arranged on the end face cooperate to form the second intermediate clamping portion (301).

6. The spliced ​​bulkhead panel according to claim 5, characterized in that: The widths of the middle splicing plate (1) and the corner splicing plate (3) are equal and both are T, and the length of the first step (12), the width of the first step (12), the length of the second step and the width of the second step are all T / 2.

7. The spliced ​​bulkhead panel according to claim 3, characterized in that: The spliced ​​bulkhead plate further comprises a corner connection assembly (4), wherein the corner connection assembly (4) comprises a first corner connection piece (41), wherein the first corner connection piece (41) is L-shaped, and the L-shaped first corner connection piece (41) can wrap around and be connected to the outer corners of the two spliced ​​corner splicing plates (3); and / or The corner connection assembly (4) comprises a second corner connection piece (42), the second corner connection piece (42) is L-shaped, and the L-shaped second corner connection piece (42) can be fitted and connected to the inner corner of the two corner splicing plates (3) that are spliced ​​together.

8. The spliced ​​bulkhead panel according to claim 3, characterized in that: The spliced ​​bulkhead plate further comprises an end connection assembly (5), wherein the end connection assembly (5) comprises a first end connection piece (51), wherein the first end connection piece (51) is U-shaped, wherein the inner side of the U-shaped first end connection piece (51) is wrapped and connected to one end of the middle splicing plate (1) or the corner splicing plate (3) in the height direction, and the outer side of the U-shaped first end connection piece (51) is fitted and connected to the hull (100), and / or The end connection assembly (5) comprises a second end connection piece (52), the second end connection piece (52) is L-shaped, one end of the L-shaped second end connection piece (52) is fitted and connected to the hull (100), and the other end is fitted and connected to the side of the middle splicing plate (1) or the corner splicing plate (3).

9. The spliced ​​bulkhead panel according to any one of claims 3 to 8, characterized in that: The middle splicing plate (1) and the corner splicing plate (3) are both embedded with a fireproof layer.

10. The spliced ​​bulkhead panel according to any one of claims 3 to 8, characterized in that: The outer surfaces of the middle splicing plate (1) and the corner splicing plate (3) are both coated with an anti-corrosion coating.

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