Fixing structure and method for composite anti-corrosion layer

Abstract

The invention discloses a fixing structure and method for a composite anti-corrosion layer, and relates to the field of corrosion prevention, the fixing structure comprises a stand column, the stand column penetrates through the composite anti-corrosion layer and is fixed to a base body, the fixing part is connected to the end, away from the base body, of the stand column, the diameter of the fixing part is larger than that of the stand column, and the fixing part is used for pressing the composite anti-corrosion layer to the surface of the base body. Sealing structures are arranged between the fixing piece and the composite anti-corrosion layer in the axial direction of the stand column at intervals. The fixing structure is arranged between the composite anti-corrosion layer and the base body, the technical problems of overall covering of the surface of the base body material and fixing of the anti-corrosion layer and the protective layer are solved, the anti-corrosion service life is greatly prolonged, the anti-corrosion quality is greatly improved, meanwhile, operation is easy, and the anti-corrosion cost of the surface of the base body is greatly reduced.

Description

Technical Field

[0001] This invention relates to the field of corrosion protection, specifically to a fixing structure and method for a composite corrosion protection layer. Background Technology

[0002] Corrosion prevention refers to the process of treating corrosion-resistant materials to effectively prevent or slow down corrosion caused by chemical or electrochemical reactions during transportation and use. According to statistics in my country, the direct economic loss from substrate corrosion in China is more than 500 billion yuan per year, while the current global loss due to material surface corrosion is as high as trillions of US dollars per year. Material surface corrosion prevention can effectively prevent or slow down corrosion, extend the service life of substrate materials, and reduce the operating costs of substrate materials.

[0003] Existing technologies include composite anti-corrosion solutions with organic anti-corrosion layers superimposed on protective layers. However, due to interface defects caused by differences in material properties between composite anti-corrosion layers, it is difficult to stably cover the composite anti-corrosion layer on irregularly shaped substrates such as reaction vessels, ships, chimneys, storage tanks, and agitators. This makes it difficult to implement existing organic anti-corrosion layer plus protective layer solutions, resulting in extremely high anti-corrosion costs, short equipment lifespans, and the need for frequent replacements, leading to huge economic losses.

[0004] In summary, in the existing technology, it is difficult for the composite anti-corrosion layer with organic anti-corrosion layer and protective layer to stably cover the substrate surface. Summary of the Invention

[0005] Based on this, the purpose of the present invention is to provide a fixing structure and method for a composite anti-corrosion layer, so as to solve the technical problem that it is difficult for a composite anti-corrosion layer with an organic anti-corrosion layer and a protective layer to stably cover the substrate surface in the prior art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a fixing structure for a composite anti-corrosion layer, including a column that passes through the composite anti-corrosion layer and is fixed to the substrate, and a fixing member that is connected to the end of the column away from the substrate and has a diameter larger than the column, for pressing the composite anti-corrosion layer to the surface of the substrate, and a sealing structure is provided between the fixing member and the composite anti-corrosion layer along the axial direction of the column.

[0007] By adopting the above technical solution, a fixing structure is set between the composite anti-corrosion layer and the substrate, which solves the technical problem of overall coverage and fixing of the anti-corrosion layer and protective layer on the substrate material surface. This greatly improves the service life and quality of anti-corrosion, while also simplifying the operation and significantly reducing the anti-corrosion cost of the substrate surface.

[0008] The present invention is further configured such that the column and the fixing member are connected by threads, and the column passes through the protective layer and the anti-corrosion layer in sequence before being connected to the base.

[0009] Preferably, the fastener is connected to the column by a wire, which facilitates the placement of the structure and also avoids drilling holes on the base surface.

[0010] The present invention is further configured such that the column is connected to the base surface of the substrate, a sealing ring is pressed between the anti-corrosion layer and the fastener, and a first gasket is pressed between the protective layer and the fastener.

[0011] Preferably, the first gasket can provide a certain degree of sealing.

[0012] The present invention is further configured such that the anti-corrosion layer has an anti-corrosion layer flange along the axial direction of the column.

[0013] Preferably, the flanged edge of the anti-corrosion layer can effectively prevent corrosive media from penetrating to the substrate surface through the gap between the column and the anti-corrosion layer.

[0014] The present invention is further configured such that a protective layer annular groove and a first gasket annular groove are respectively provided facing each other between the protective layer and the first gasket annular groove, and a sealing ring is pressed between the protective layer annular groove and the first gasket annular groove.

[0015] Preferably, the sealing ring between the protective layer annular groove and the first gasket annular groove can effectively increase the ability of the fastener and the protective layer to prevent the penetration of corrosive media after being deformed by pressure.

[0016] The invention is further configured such that the protective layer has a conical recess facing the fixing member, the first gasket is a conical protrusion that fits the conical recess, the outer wall of the column is fitted with a wedge-shaped ring, and the fixing member can press the wedge-shaped ring tightly when connected to the column.

[0017] Preferably, the wedge ring can further compress the first gasket after being squeezed by the fixing element, thereby improving the sealing performance at the perforation of the composite anti-corrosion layer.

[0018] The invention is further configured such that the column is fixedly connected to the fixing member, and the end of the fixing member facing the protective layer can adopt an inclined structure and be recessed into the protective layer.

[0019] Preferably, the surface of the composite anti-corrosion layer is made smoother.

[0020] The present invention is further configured such that the column penetrates the base and is fixedly connected to the base by a nut.

[0021] Preferably, when the base can be penetrated, the stability of the fixing structure can be further improved by the connection between the nut and the column.

[0022] The present invention is further configured such that the end of the column away from the fixing member is provided with a thread, and can be connected to the base body through the thread.

[0023] Preferably, the fastener is integrated with the column, and the thread at the end of the column is used to directly connect it to the base, which effectively saves a lot of time in installing the fastener.

[0024] A method for fixing a composite anti-corrosion layer, the process of which includes the following steps:

[0025] Step 1: Select a whole anti-corrosion layer or a spliced ​​anti-corrosion layer according to the area of ​​the substrate surface. The thickness of the selected anti-corrosion layer is 0.5-2.0mm. The spliced ​​anti-corrosion layer overlaps are formed into a whole anti-corrosion layer by hot air hot melt welding, hot pressure hot melt welding or ultrasonic welding, so that the area and shape of the final anti-corrosion layer are consistent with the area and shape of the substrate surface.

[0026] Step 2: Cut the protective layer into whole pieces or multiple pieces according to the surface area of ​​the substrate, so that the final overall area and shape of the protective layer are consistent with the surface of the substrate;

[0027] Step 3: Drill a through hole every 5-50cm on the surface of the protective layer using a drilling machine or hole opener;

[0028] Step 4: Cover the entire anti-corrosion layer onto the substrate surface, and then cover the entire protective layer onto the anti-corrosion layer surface;

[0029] Step 5: Drill holes in the anti-corrosion layer at the center of each through hole in the protective layer. When the column and the fastener are separate, connect the column to the base first, fill the sealing structure, and then connect the fastener. When the column and the fastener are integrated, fill the sealing structure directly and then connect the column and the fastener.

[0030] In summary, the present invention has the following main beneficial effects:

[0031] 1. This invention solves the technical problem of overall coverage and fixation of the anti-corrosion layer and protective layer on the substrate material surface by setting a fixing structure between the composite anti-corrosion layer and the substrate, which greatly improves the service life and quality of anti-corrosion. At the same time, it is simple to operate and also greatly reduces the anti-corrosion cost of the substrate surface.

[0032] 2. This invention provides a sealing ring at the perforation of the protective layer and the anti-corrosion layer, and uses a fastener to connect the column or the base to compress the sealing ring, which effectively ensures the sealing of the perforation of the anti-corrosion layer and the protective layer, and prevents corrosive media from seeping into the base surface along the gap at the fastener connection.

[0033] 3. By setting the fastener to a conical structure, the present invention utilizes the conical surface of the fastener to fully contact the gasket structure between the fastener and the protective layer, thereby further improving the sealing performance at the perforation and extending the service life of the composite anti-corrosion layer.

[0034] 4. This invention uses a wedge-shaped ring fitted onto the column. During the connection of the column, the wedge-shaped ring is pushed by the fixing component. The wedge-shaped ring makes close contact with the fixing component during the movement, and at the same time further compresses the gasket structure. This can effectively prevent corrosive media from seeping into the gap between the protective layer and the anti-corrosion layer through the perforations of the protective layer, thereby extending the service life of the composite anti-corrosion layer. Attached Figure Description

[0035] Figure 1 This is a schematic diagram of the structure of the first embodiment of the present invention;

[0036] Figure 2 This is a schematic diagram of the protective layer joint in the first embodiment of the present invention;

[0037] Figure 3 This is a schematic diagram of another protective layer joint of the present invention;

[0038] Figure 4 This is a schematic diagram of the structure of the second embodiment of the present invention;

[0039] Figure 5 This is a schematic diagram of the structure of the third embodiment of the present invention;

[0040] Figure 6 This is a schematic diagram of the structure of the fourth embodiment of the present invention;

[0041] Figure 7 This is a schematic diagram of the structure of the fifth embodiment of the present invention;

[0042] Figure 8 This is a schematic diagram of the structure of the sixth embodiment of the present invention;

[0043] Figure 9 This is a schematic diagram of the structure of the seventh embodiment of the present invention;

[0044] Figure 10 This is a schematic diagram of the structure of the eighth embodiment of the present invention;

[0045] Figure 11 This is a structural schematic diagram of the ninth embodiment of the present invention.

[0046] Explanation of reference numerals in the attached figures:

[0047] 101. Fastener; 102. First step; 103. Second step; 104. Center hole; 105. Column; 106. Internal thread of center hole; 107. Sealing ring; 108. First gasket; 109. Protective layer; 110. Anti-corrosion layer; 111. Substrate surface; 112. Substrate; 113. Step component; 114. Fastening area; 115. Beveled edge of protective layer; 116. Non-straight edge of protective layer; 201. Annular groove of protective layer; 202. Annular groove of first gasket; 301. Nut; 302. Second gasket; 303. Step nut; 401. Internal step of substrate; 501. Wedge ring; 601. Anti-corrosion layer flange. Detailed Implementation

[0048] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0049] The embodiments of the present invention will now be described.

[0050] First embodiment:

[0051] Please refer to the fixing structure of a composite anti-corrosion layer. Figure 1-3 It includes a column 105, which passes through the composite anti-corrosion layer and is fixed to the substrate 112. The substrate surface 111 of the substrate 112 is a plane. Specifically, the substrate 112 is the surface of equipment that needs to be protected against corrosion, such as reaction vessels, ships, chimneys, storage tanks and agitators.

[0052] It also includes a fastener 101, which can be made of alumina or silicon carbide ceramic. In this embodiment, alumina is preferred. The fastener 101 includes a stepped component 113. The side of the stepped component 113 facing the protective layer 109 is the first step 102. The end of the fastener 101 near the base 112 is the second step 103. A center hole 104 is machined in the center of the second step 103. A center hole internal thread 106 is machined in the center hole 104. The center hole internal thread 106 is the internal thread of a national standard bolt.

[0053] Furthermore, the fastener 101 is connected to the end of the column 105 away from the substrate and has a diameter larger than the column 105. It is used to press the composite anti-corrosion layer onto the surface of the substrate. A sealing structure is provided between the fastener 101 and the composite anti-corrosion layer along the axial direction of the column 105. The fastener 101 has a fastening area 114. The fastening area 114 has a shape that is either an external hexagon, an internal hexagon, a square, or a cross groove. Specifically, in this embodiment, the sealing ring 107 is a PTFE-coated O-ring. The first gasket 108, the fastener 101, and other components are all made of anti-corrosion material. The protective layer 109 is specifically ceramic in this application, while the anti-corrosion layer 110 is specifically made of silicone resin.

[0054] For details regarding the above embodiments, please refer to [link / reference]. Figure 1 The column 105 and the fastener 101 are connected by threads. The column 105 passes through the protective layer 109 and the anti-corrosion layer 110 in sequence and is then connected to the base 112. The fastener 101 is connected to the column 105 by thread, which facilitates the placement of the structure and also avoids drilling holes on the surface of the base 112.

[0055] Specifically, the column 105 is connected to the base surface 111 of the base 112, a sealing ring 107 is pressed between the anti-corrosion layer 110 and the fastener 101, and a first gasket 108 is pressed between the protective layer 109 and the fastener 101. The first gasket 108 can play a certain sealing role.

[0056] For details regarding the above embodiments, please refer to [link / reference]. Figure 2-3 To prevent corrosive media from flowing through the gaps in the protective layer 109 to the anti-corrosion layer 110, the joints of the protective layer 109 can be designed as beveled edges 115 or as non-straight edges 116.

[0057] A method for fixing a composite anti-corrosion layer, the process of which includes the following steps:

[0058] Step 1: Select a whole piece of anti-corrosion layer 110 according to the area of ​​the substrate surface 111. The thickness of the selected anti-corrosion layer 110 is 0.5mm, so that the area and shape of the final anti-corrosion layer 110 are consistent with the area and shape of the substrate surface 111.

[0059] Step 2: Cut the entire protective layer 109 according to the area of ​​the substrate surface 111, so that the final overall area and shape of the protective layer 109 are consistent with the substrate surface 111;

[0060] Step 3: Drill a through hole every 5cm on the surface of the protective layer 109 using a drilling machine or hole opener;

[0061] Step 4: Cover the substrate surface 111 with the anti-corrosion layer 110, and then cover the surface of the anti-corrosion layer 110 with the protective layer 109.

[0062] Step 5: Drill holes in the anti-corrosion layer 110 at the center point of each through hole in the protective layer 109. First, connect the column 105 to the base 112. Specifically, in this embodiment, the column 105 is welded to the base 112 by pulse welding. After filling the sealing structure, connect the fastener 101. Specifically, place the first gasket 108 between the first step 102 and the protective layer 109. Tighten the center hole 104 of the double-layer fastener 101 to the column 105 until the second step 103 of the double-layer fastener 101 presses the sealing ring 107, so that the through holes of the protective layer 109 are sealed.

[0063] Second embodiment:

[0064] Please refer to the fixing structure of a composite anti-corrosion layer. Figure 4 Based on the first embodiment, the difference from the first embodiment is that the anti-corrosion layer 110 is provided with an anti-corrosion layer flange 601 along the axial direction of the column 105, and the sealing ring 107 is placed between the anti-corrosion layer flange 601 and the protective layer 109. The anti-corrosion layer 110 in contact with the sealing ring 107 is a sealing surface. The anti-corrosion layer flange 601 can effectively prevent corrosive media from penetrating to the substrate surface 111 through the gap between the column 105 and the anti-corrosion layer 110.

[0065] Third embodiment:

[0066] Please refer to the fixing structure of a composite anti-corrosion layer. Figure 5 Based on the second embodiment, the difference from the second embodiment is that a protective layer annular groove 201 and a first gasket annular groove 202 are respectively provided facing each other between the protective layer 109 and the first gasket 108. A sealing ring 107 is pressed between the protective layer annular groove 201 and the first gasket annular groove 202. After the sealing ring 107 between the protective layer annular groove 201 and the first gasket annular groove 202 is deformed under pressure, it can effectively increase the ability of the fastener 101 and the protective layer 109 to prevent corrosive media from penetrating.

[0067] Fourth embodiment:

[0068] Please refer to the fixing structure of a composite anti-corrosion layer. Figure 6 Based on the third embodiment, the difference from the third embodiment is that the protective layer 109 is provided with a conical concave platform facing the fixing member 101, the first gasket 108 is in the shape of a conical protrusion that fits the conical concave platform, and a wedge ring 501 is sleeved on the outer wall of the column 105. When the fixing member 101 is connected to the column 105, it can press the wedge ring 501 tightly. After being squeezed by the fixing member 101, the wedge ring 501 can further press the first gasket 108, thereby improving the sealing performance of the perforation of the composite anti-corrosion layer.

[0069] Fifth embodiment:

[0070] Please refer to the fixing structure of a composite anti-corrosion layer. Figure 7 Based on the first embodiment, the difference from the first embodiment is that the column 105 is fixedly connected to the fastener 101, and the column 105 and the fastener 101 are an integral whole. The end of the fastener 101 facing the protective layer 109 can adopt a beveled structure and sink into the protective layer 109, making the surface of the composite anti-corrosion layer smoother. The column 105 penetrates the base 112 and is fixedly connected to the base 112 by the nut 301. When the base 112 can be penetrated, the connection between the nut 301 and the column 105 can further improve the stability of the fixed structure.

[0071] Specifically, the column 105 of the fastener 101 is an integral structure. After passing through the base 112, the column 105 is fixedly connected to the base 112 by the nut 301. That is, a through hole is directly drilled at the center point of each through hole in the protective layer 109. The through hole in the base 112 does not need to be threaded, but the end of the column 105 is threaded. In this embodiment, the first step 102 is composed of the second washer 302. The second washer 302 can be ceramic, glass or other corrosion-resistant materials. In this embodiment, glass is preferred. The second step 103 is composed of the step nut 303.

[0072] A method for fixing a composite anti-corrosion layer, the process of which includes the following steps:

[0073] Step 1: Select the anti-corrosion layer 110 to be spliced ​​according to the area of ​​the substrate surface 111. The thickness of the selected anti-corrosion layer 110 is 2.0mm. The overlapping part of the spliced ​​anti-corrosion layer 110 is formed into a whole by hot air hot melt welding, so that the area and shape of the final anti-corrosion layer 110 are consistent with the area and shape of the substrate surface 111.

[0074] Step 2: Use multiple pieces of the protective layer 109 to match the area of ​​the substrate surface 111, so that the final overall area and shape of the protective layer 109 are consistent with the substrate surface 111.

[0075] Step 3: Drill a through hole every 25cm on the surface of the protective layer 109 using a drilling machine or hole opener;

[0076] Step 4: Cover the substrate surface 111 with the anti-corrosion layer 110, and then cover the surface of the anti-corrosion layer 110 with the protective layer 109.

[0077] Step 5: Drill holes in the anti-corrosion layer 110 at the center of each through hole in the protective layer 109, fill the sealing structure directly, and then connect the column 105 and the fastener 101. Alternatively, the sealing ring 107 can be put on the column 105 and then directly connected to the base 112.

[0078] Sixth embodiment:

[0079] Please refer to the fixing structure of a composite anti-corrosion layer. Figure 8 Based on the fifth embodiment, the difference from the fifth embodiment is that the end of the column 105 away from the fixing member 101 is provided with a thread, and can be connected to the base 112 through the thread, so that the fixing member 101 and the column 105 are integrated, and the thread at the end of the column 105 is directly connected to the base 112, which effectively saves a lot of time in installing the fixing member 101.

[0080] Specifically, the stepped component 113 of the fastener 101 is integrated with the column 105. After tapping the center point of each through hole in the protective layer 109, it is not necessary to screw in the threaded column 105 first. Instead, after putting the sealing ring 107 on the column 105 and inserting the first gasket 108, the double-layer fastener 101 can be tightened directly, saving a lot of connection time for the fastening structure.

[0081] Seventh embodiment:

[0082] Please refer to the fixing structure of a composite anti-corrosion layer. Figure 9 Based on the sixth embodiment, the difference from the sixth embodiment is that the double-step component 113 of the fastener 101 is a conical countersunk nut, the first washer 108 is funnel-shaped, the column 105 of the fastener 101 is fixed to the base 112 by threads, and the sealing ring 107 is located on the step 401 inside the base.

[0083] Eighth embodiment:

[0084] Please refer to the fixing structure of a composite anti-corrosion layer. Figure 10 Based on the seventh embodiment, the difference from the seventh embodiment is that the first step 102 and the second step 103 of the fastener 101 are two parts of the same conical surface, the sealing ring 107 and the first gasket 108 are integrated, and the diameter of the sealing ring 107 is larger than that of the first gasket 108. The top of the opening of the base 112 is conical to cooperate with the fastener 101. The fastener 101 seals the through hole of the anti-corrosion layer 110 by pressing the thicker sealing ring 107 with the conical second step 103.

[0085] Ninth embodiment:

[0086] Please refer to the fixing structure of a composite anti-corrosion layer. Figure 11Based on the eighth embodiment, the difference from the eighth embodiment is that the fastener 101 is countersunk relative to the protective layer 109. In other undisclosed embodiments, a partially countersunk form may also be used. The fastener 101 has an arc-shaped second step 103, which fixes the circular sealing ring 107. The base 112 has a central hole 104 with threads. The post 105 of the fastener 101 is a stud, which is fixed to the central hole 104 by its threads. The first step 102, the first gasket 108, and the opening of the protective layer 109 are all conical. The fastener 101 limits the protective layer 109 by the first gasket 108, thereby achieving the effect of fixing the composite anti-corrosion layer.

[0087] In the specific process of fixing the composite anti-corrosion layer, the present invention:

[0088] Select appropriate anti-corrosion layer 110 and protective layer 109 according to the area of ​​substrate surface 111. Make through holes at intervals on the surface of protective layer 109. Cover the substrate surface 111 with the entire anti-corrosion layer 110. Then cover the surface of anti-corrosion layer 110 with the entire protective layer 109. Drill holes in the center of each through hole of protective layer 109 and connect fastener 101 and column 105 to easily fix the composite anti-corrosion layer.

[0089] Although embodiments of the present invention have been shown and described, these specific embodiments are merely explanations of the invention and are not intended to limit it. The specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. After reading this specification, those skilled in the art may make modifications, substitutions, and variations to the embodiments as needed without departing from the principles and spirit of the invention, but such modifications, substitutions, and variations are protected by patent law as long as they are within the scope of the claims of the present invention.

Claims

1. A fixing structure for a composite anti-corrosion layer, characterized in that, include: A column (105) passes through the composite anti-corrosion layer and is fixed to the substrate; A fastener (101) is connected to the end of the column (105) away from the substrate and has a diameter larger than the column (105). It is used to press the composite anti-corrosion layer onto the surface of the substrate. A sealing structure is provided between the fastener (101) and the composite anti-corrosion layer along the axial direction of the column (105).

2. The fixing structure of the composite anti-corrosion layer according to claim 1, characterized in that: The column (105) is connected to the fastener (101) by a thread. The column (105) passes through the protective layer (109) and the anti-corrosion layer (110) in sequence and is then connected to the base (112).

3. The fixing structure of the composite anti-corrosion layer according to claim 1, characterized in that: The column (105) is connected to the base surface (111) of the base (112), and a sealing ring (107) is pressed between the anti-corrosion layer (110) and the fastener (101).

4. The fixing structure of the composite anti-corrosion layer according to claim 2, characterized in that: The anti-corrosion layer (110) is provided with an anti-corrosion layer flange (601) along the axial direction of the column (105).

5. The fixing structure of the composite anti-corrosion layer according to claim 2, characterized in that: A first gasket (108) is pressed between the protective layer (109) and the fastener (101). A protective layer annular groove (201) and a first gasket annular groove (202) are respectively provided between the protective layer (109) and the first gasket (108). A sealing ring (107) is pressed between the protective layer annular groove (201) and the first gasket annular groove (202).

6. The fixing structure of the composite anti-corrosion layer according to claim 5, characterized in that: The protective layer (109) is provided with a conical concave platform facing the fixing member (101), the first gasket (108) is in the shape of a conical protrusion that fits the conical concave platform, the outer wall of the column (105) is fitted with a wedge-shaped ring (501), and the fixing member (101) can press the wedge-shaped ring (501) tightly when connected to the column (105).

7. The fixing structure of the composite anti-corrosion layer according to claim 1, characterized in that: The column (105) is fixedly connected to the fastener (101), and the end of the fastener (101) facing the protective layer (109) can adopt a sloping structure and be recessed into the protective layer (109).

8. The fixing structure of the composite anti-corrosion layer according to claim 7, characterized in that: The column (105) penetrates the base (112) and is fixedly connected to the base (112) by a nut (301).

9. The fixing structure of the composite anti-corrosion layer according to claim 7, characterized in that: The end of the column (105) away from the fixing member (101) is provided with a thread, and can be connected to the base (112) through the thread.

10. A method for fixing a composite anti-corrosion layer, characterized in that... The process of using the fixing structure of the composite anti-corrosion layer according to any one of claims 1-9 includes the following steps: Step 1: Select a single piece or a spliced ​​anti-corrosion layer based on the area of ​​the substrate surface. The thickness of the selected anti-corrosion layer should be 0.5-2.0mm. Step 2: Cut the protective layer into whole pieces or multiple pieces according to the surface area of ​​the substrate, so that the final overall area and shape of the protective layer are consistent with the surface of the substrate; Step 3: Drill a through hole every 5-50cm on the surface of the protective layer using a drilling machine or hole opener; Step 4: Cover the entire anti-corrosion layer onto the substrate surface, and then cover the entire protective layer onto the anti-corrosion layer surface; Step 5: Drill holes in the anti-corrosion layer at the center of each through hole in the protective layer. When the column and the fastener are separate, connect the column to the base first, fill the sealing structure, and then connect the fastener. When the column and the fastener are integrated, fill the sealing structure directly and then connect the column and the fastener.

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