CN112501609A

CN112501609A - Steel structure self-isolation type corrosion prevention process

Info

Publication number: CN112501609A
Application number: CN202011306194.XA
Authority: CN
Inventors: 刘绿霞
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-11-19
Filing date: 2020-11-19
Publication date: 2021-03-16

Abstract

The invention discloses a self-isolation type anticorrosion process for a steel structure, which belongs to the technical field of steel structures, and can isolate the surface of the steel structure from the external environment by adopting a mode of combining laser cladding and an anticorrosion coating, and a plurality of self-isolation reinforcing pipes are pre-embedded in the anticorrosion coating on the surface layer, so that the performance and the strength of the anticorrosion coating can be greatly improved, scratches and impact cracks are not easy to occur, meanwhile, damage isolation protection is provided, when the anticorrosion coating is accidentally damaged, sensing is carried out by arranging breakable sensing microspheres, protective gas in an isolation ball is released, air entering the damaged part is driven, further diffusion corrosion is avoided, then the broken sensing microspheres expose a spontaneous heating inner core, oxidation reaction can be carried out with oxygen in the external air to generate heat, and the interior of the isolation ball is heated to trigger expansion action, and the rust-proof oil is released to fill the damaged part, so that the double isolation of moisture and air is realized, and the steel structure is effectively protected from being corroded.

Description

Steel structure self-isolation type corrosion prevention process

Technical Field

The invention relates to the technical field of steel structures, in particular to a self-isolation type corrosion prevention process for a steel structure.

Background

Steel structures are structures composed of steel materials and are one of the main building structure types. The structure mainly comprises steel beams, steel columns, steel trusses and other members made of section steel, steel plates and the like, and rust removing and preventing processes such as silanization, pure manganese phosphating, washing drying, galvanization and the like are adopted. The components or parts are typically joined by welds, bolts or rivets. Because of its light dead weight, and construction is simple and convenient, widely apply to fields such as large-scale factory building, venue, superelevation layer. The steel structure is easy to rust, and generally the steel structure needs to be derusted, galvanized or painted, and needs to be maintained regularly.

Steel structure engineering is a structure mainly made of steel, and is one of the main building structure types in the modern time. The global steel yield per year exceeds one hundred million tons, the steel equipment scrapped due to corrosion is about 30 percent of the annual yield per year, and how to improve the rust removal and corrosion prevention construction process of the steel structure becomes a problem to be solved urgently.

However, when the corrosion-resistant coating on the surface of the steel structure is damaged due to poor performance, the steel structure body is exposed to the outside to generate corrosion. The steel structure building is generally a large-scale permanent building, has long service life and difficult maintenance, and must be effectively and long-term preserved to ensure the service life of the building.

Disclosure of Invention

1. Technical problem to be solved

Aiming at the problems in the prior art, the invention aims to provide a steel structure self-isolation type anticorrosion process, which can isolate the surface of a steel structure from the external environment by adopting a mode of combining laser cladding and an anticorrosion coating, and pre-embed a plurality of self-isolation reinforcing pipes in the anticorrosion coating on the surface layer, thereby not only greatly improving the performance and the strength of the anticorrosion coating, being not easy to scratch and impact cracks, but also providing damage isolation protection, when the anticorrosion coating is accidentally damaged, sensing is carried out by arranging breakable sensing microspheres, the protective gas in an isolation ball is released, the air entering the damaged part is driven, further diffusion erosion is avoided, then the broken sensing microspheres expose a spontaneous heating inner core, the self-heating inner core can generate heat through oxidation reaction with oxygen in the external air, and the inside of the isolation ball is heated to trigger expansion action, and the rust-proof oil is released to fill the damaged part, so that the double isolation of moisture and air is realized, and the steel structure is effectively protected from being corroded.

2. Technical scheme

In order to solve the above problems, the present invention adopts the following technical solutions.

A steel structure self-isolation type anticorrosion process comprises the following steps:

s1, removing rust, oil stains and pollutants on the surface of the steel structure by adopting a mechanical treatment or chemical treatment mode, and preheating to 150-200 ℃;

s2, feeding metallurgical powder into a cladding pool, and forming a uniform and compact laser cladding coating on the surface of the steel structure in a scanning cladding mode;

s3, preserving heat at 140-180 ℃ after cladding, preparing an anticorrosive paint when the laser cladding coating is not completely cured, and uniformly doping the anticorrosive paint into the self-isolation reinforcing pipe according to the density of 1/10 ml;

and S4, coating an anticorrosive coating on the laser cladding coating, and then curing at normal temperature to form an isolating layer.

Further, the surface of the steel structure is polished to ST2 level in the step S1, and the surface roughness Rz60-80 μm.

Further, the laser process parameters adopted in the laser cladding process in step S2 include: the laser power is 1500W-10000W, the laser scanning speed is 600mm/min-3000mm/min, the light spot length is 4mm-12mm, the light spot width is 1mm-8mm, and the lap joint rate is 50% -60%.

Further, the metallurgical powder in the step S2 includes the following raw materials by weight: 0.2 to 1.65 percent of C, 11 to 30 percent of Cr, 0.5 to 1.2 percent of Si, 2 to 4 percent of Ni, 0.5 to 1.7 percent of Mn, 0.6 to 2.8 percent of Mo, 0.3 to 0.8 percent of Cu, 0.5 to 6 percent of W, 20 to 30 percent of Al, 10 to 15 percent of Zn and the balance of Fe.

Further, the anticorrosive paint comprises the following raw materials in parts by weight: 20-30 parts of epoxy resin, 5-10 parts of kaolin, 1-3 parts of titanium dioxide, 0.5-1 part of white carbon black, 5-10 parts of n-butyl silicate, 0.5-1.5 parts of defoaming agent, 1.5-2.5 parts of film-forming additive, 1-2 parts of thickening agent and 25-35 parts of propanol.

Further, inlay in the reinforcement pipe from keeping apart and be connected with a plurality of evenly distributed's isolation ball, isolation ball outer end opening part is connected with the perception microballon, and the perception microballon is located from keeping apart the reinforcement outside of tubes surface, and the reinforcement effect to anticorrosive coating is mainly played from keeping apart the reinforcement pipe, and the perception microballon is used for the damage of perception anticorrosive coating and triggers the isolation action along with self cracked, and the isolation ball realizes the three-phase isolation based on gas solid-liquid, has excellent isolation effect, avoids anticorrosive coating to further suffer the erosion.

Furthermore, the isolation ball comprises a gas storage bag, an oil storage bag and a phase change sleeve, one end of the gas storage bag is connected with the sensing microsphere, the phase change sleeve is embedded between the gas storage bag and the oil storage bag, the oil storage bag is wrapped on the outermost side, an isolation action is triggered after the sensing microsphere is cracked, the gas storage bag is not blocked any more, protective gas in the gas storage bag is released to the damaged part quickly, air entering the damaged part is driven away, the phase change sleeve plays a primary shaping effect on the gas storage bag, extrusion on the oil storage bag in the initial stage of cracking of the sensing microsphere is avoided, rust-proof oil is released in advance, and air driving is not thorough enough.

Further, the gas storage bag is filled with highly compressed protective gas, the protective gas is argon gas, nitrogen gas, helium gas or carbon dioxide, the oil storage bag is filled with anti-rust oil, the phase change sleeve is filled with hot melt substances, the phase change sleeve is in a solid state and plays a shaping role in the gas storage bag in a normal state, the phase change sleeve can be melted into a solid state in a heating state, and at the moment, gas expansion in the gas storage bag can extrude the oil storage bag, so that the stored anti-rust oil is released.

Furthermore, the sensing microsphere comprises a self-heating inner core, a fragile spherical shell, isolating powder and an extension-assisting oil guide rod, wherein the isolating powder is filled between the self-heating inner core and the fragile spherical shell, the fragile spherical shell is wrapped at the outermost side, one end of the extension-assisting oil guide rod is connected with the self-heating inner core, the other end of the extension-assisting oil guide rod penetrates through the self-heating inner core and is connected with the isolating ball, the fragile spherical shell plays an isolating role between the self-heating inner core and air under a normal state, the fragile spherical shell can be simultaneously cracked and does not block the air storage bag when the anticorrosive coating is damaged, gas in the air storage bag is rapidly flushed out and wrapped with the isolating powder to be released to a damaged part or even to the surface of the coating, the self-heating inner core is used for triggering an oxidation reaction with oxygen after protective gas drives away air, further, heat is provided as power for the release of antirust oil, and the extension-assisting oil guide rod can force the self-heating inner core to extend to the damaged part after, and guiding the anti-rust oil to perform high filling to form the printing ink to realize high isolation.

Furthermore, the self-heating inner core is made of a self-heating material, the fragile spherical shell is made of a brittle material, the isolating powder is colored aluminum powder with the filling rate of 30-50%, the extension-assisting oil guide rod is made of an elastic oil guide material, the self-heating material can react with oxygen in the air and release heat, the fragile spherical shell is easily broken when being subjected to mechanical impact, a good impact sensing effect can be achieved, the colored aluminum powder can prompt technical personnel that an anticorrosive coating is damaged, meanwhile, the aluminum powder can be filled in the damaged part, and a compact aluminum oxide film can be formed instead of oxidation reaction, so that the isolating effect is improved in an auxiliary mode.

3. Advantageous effects

Compared with the prior art, the invention has the advantages that:

(1) the scheme can isolate the surface of the steel structure from the external environment by adopting a mode of combining laser cladding and an anticorrosive coating, and a plurality of self-isolation reinforcing pipes are pre-embedded in the anticorrosive coating on the surface layer, so that the performance and the strength of the anticorrosive coating can be greatly improved, scratches and impact cracks are not easy to appear, and meanwhile, damage isolation protection is provided, when the anticorrosive coating is accidentally damaged, sensing is carried out by arranging the sensing microspheres which are easy to crack, protective gas in the isolation ball is released, air entering the damaged part is driven, further diffusion erosion is avoided, then the sensing microspheres after cracking expose the spontaneous heating inner core, oxidation reaction can be carried out with oxygen in the external air to generate heat, the heating triggering expansion action is carried out on the inner part of the isolation ball, and antirust oil is released to fill the damaged part, thereby realizing double isolation of moisture and air, effectively protect the steel structure from corrosion.

(2) Inlay the spacer ball that is connected with a plurality of evenly distributed in the reinforcement pipe from keeping apart, spacer ball outer end opening part is connected with the perception microballon, and the perception microballon is located from keeping apart reinforcement outside of tubes surface, keep apart the reinforcement pipe from mainly playing the additional contribution to anticorrosive coating, the perception microballon is used for the damage of perception anticorrosive coating and triggers the isolation action along with self cracked, the spacer ball realizes the three-phase isolation based on gas-solid liquid, has excellent isolation effect, avoid anticorrosive coating further to suffer the erosion.

(3) The isolation ball includes the gas storage package, oil storage package and phase transition cover, and gas storage package one end is connected with the perception microballon, the phase transition cover is inlayed between gas storage package and oil storage package, and the oil storage package wraps up in the outside, trigger the isolation action after the perception microballon is cracked, no longer form the shutoff to the gas storage package, protective gas in the gas storage package releases to damaged department fast, the air that will get into damaged department drives away, the phase transition cover plays the preliminary setting effect to the gas storage package, avoid just forming the extrusion to the oil storage package at the cracked initial stage of perception microballon, lead to antirust oil to release in advance, the air drives thoroughly inadequately.

(4) The gas storage package intussuseption is filled with highly compressed protective gas, and protective gas is argon gas, nitrogen gas, helium or carbon dioxide, and the oil storage package intussuseption is filled with antirust oil, and the phase transition intussuseption is filled with hot melt material, and the phase transition cover plays the setting effect to the gas storage package for solid-state under normal condition, and it can be molten for solid-state under the heating state, and the gas expansion in the gas storage package this moment can form the extrusion to the oil storage package to release the antirust oil of storage.

(5) The sensing microsphere comprises a self-heating inner core, a fragile spherical shell, isolating powder and an extension-assisting oil guide rod, wherein the isolating powder is filled between the self-heating inner core and the fragile spherical shell, the fragile spherical shell is wrapped on the outermost side, one end of the extension-assisting oil guide rod is connected with the self-heating inner core, the other end of the extension-assisting oil guide rod penetrates through the self-heating inner core and is connected with the isolating ball, the fragile spherical shell plays an isolating role between the self-heating inner core and air in a normal state, meanwhile, when the anticorrosive coating is damaged, the fragile spherical shell can be simultaneously cracked and does not block an air storage bag, air in the air storage bag rushes out rapidly and wraps the isolation powder to be released to the damaged part or even to the surface of the coating, the self-heating inner core is used for triggering an oxidation reaction with oxygen after protective gas drives away air, and further serving as power for releasing antirust oil, the extension-assisting oil guide rod can force the self-heating inner core to extend to the damaged, and guiding the anti-rust oil to perform high filling to form the printing ink to realize high isolation.

(6) The spontaneous heating inner core adopts spontaneous heating material to make, breakable spherical shell adopts fragile material to make, keep apart the powder and be the non-ferrous aluminum powder of filling rate 30-50%, help to extend and lead the beam hanger to adopt elasticity to lead oily material to make, spontaneous heating material can react and release heat with the oxygen in the air, breakable spherical shell ten minutes is cracked easily when receiving mechanical shock, can play good impact perception effect, non-ferrous aluminum powder not only can indicate technical staff anticorrosive coating and appear the damage, the aluminite powder also can fill in damaged department simultaneously, can replace to take place oxidation reaction and form compact aluminium oxide film, thereby supplementary improvement isolation effect.

Drawings

FIG. 1 is a schematic structural view of the surface of a steel structure according to the present invention;

FIG. 2 is a schematic structural view of a self-isolating reinforced pipe according to the present invention;

FIG. 3 is a schematic view of the structure at A in FIG. 2;

FIG. 4 is a schematic structural diagram of a sensing microsphere of the present invention;

FIG. 5 is a schematic structural diagram of the isolation ball of the present invention in an isolated state.

The reference numbers in the figures illustrate:

the self-insulation oil guide rod comprises a self-insulation reinforcing pipe 1, an insulation ball 2, a gas storage bag 21, a gas storage bag 22, a phase change sleeve 23, a sensing microsphere 3, a self-heating inner core 31, a fragile ball shell 32, insulation powder 33 and an extension-assisted oil guide rod 34.

Detailed Description

The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention; it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments, and all other embodiments obtained by those skilled in the art without any inventive work are within the scope of the present invention.

In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "top/bottom", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "disposed," "sleeved/connected," "connected," and the like are to be construed broadly, e.g., "connected," which may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Example 1:

referring to fig. 1, a self-isolation anticorrosion process for a steel structure includes the following steps:

s1, removing rust, oil stains and pollutants on the surface of the steel structure in a mechanical treatment or chemical treatment mode, and preheating to 150 ℃;

s3, preserving heat at 140 ℃ after cladding, preparing an anticorrosive paint when the laser cladding coating is not completely cured, and uniformly doping the anticorrosive paint into the self-isolation reinforcing pipe 1 according to the density of 1/10 ml;

Further, the surface of the steel structure is polished to ST2 level in step S1, and the surface roughness Rz60-80 μm.

The laser process parameters adopted in the laser cladding process in the step S2 include: the laser power is 1500W, the laser scanning speed is 600mm/min, the spot length is 4mm, the spot width is 1mm, and the lap joint rate is 50%.

The metallurgical powder in the step S2 comprises the following raw materials in percentage by weight: 0.2% of C, 11% of Cr, 0.5% of Si, 2% of Ni, 0.5% of Mn, 0.6% of Mo, 0.3% of Cu, 0.5% of W, 20% of Al, 10% of Zn and the balance of Fe.

The anticorrosive paint comprises the following raw materials in parts by weight: 20-30 parts of epoxy resin, 5-10 parts of kaolin, 1-3 parts of titanium dioxide, 0.5-1 part of white carbon black, 5-10 parts of n-butyl silicate, 0.5-1.5 parts of defoaming agent, 1.5-2.5 parts of film-forming additive, 1-2 parts of thickening agent and 25-35 parts of propanol.

Please refer to fig. 2, a plurality of uniformly distributed isolation balls 2 are embedded and connected in the self-isolation reinforcing pipe 1, an opening at the outer end of each isolation ball 2 is connected with a sensing microsphere 3, the sensing microsphere 3 is located on the outer surface of the self-isolation reinforcing pipe 1, the self-isolation reinforcing pipe 1 mainly plays a role in reinforcing the anticorrosive coating, the sensing microsphere 3 is used for sensing the damage of the anticorrosive coating and triggering the isolation action along with the self-fragmentation, the isolation balls 2 realize three-phase isolation based on gas-solid-liquid, and the isolation effect is excellent, thereby preventing the anticorrosive coating from being further corroded.

Referring to fig. 3, the isolation ball 2 includes a gas storage bag 21, an oil storage bag 22 and a phase change sleeve 23, one end of the gas storage bag 21 is connected with the sensing microsphere 3, the phase change sleeve 23 is embedded between the gas storage bag 21 and the oil storage bag 22, the oil storage bag 22 is wrapped on the outermost side, an isolation action is triggered after the sensing microsphere 3 is cracked, the gas storage bag 21 is not blocked, protective gas in the gas storage bag 21 is released to the damaged part quickly, air entering the damaged part is driven out, the phase change sleeve 23 plays a primary shaping effect on the gas storage bag 21, and the phenomenon that the oil storage bag 22 is extruded at the initial stage of cracking of the sensing microsphere 3, so that rust-proof oil is released in advance, and air driving is not thorough enough is avoided.

The gas storage package 21 intussuseption is filled with highly compressed protective gas, and protective gas is argon gas, nitrogen gas, helium or carbon dioxide, and the oil storage package 22 intussuseption is filled with antirust oil, and the phase change cover 23 intussuseption is filled with hot melt material, and the phase change cover 23 plays the setting effect for solid-state to gas storage package 21 under normal condition, and it can be molten to be solid-state under the heating state, and the gas expansion in the gas storage package 21 can form the squeezing action to oil storage package 22 this moment to release the antirust oil of storage.

Referring to fig. 4-5, the sensing microsphere 3 includes a self-heating inner core 31, a fragile spherical shell 32, a separation powder 33 and an extension-assisting oil-guiding rod 34, the separation powder 33 is filled between the self-heating inner core 31 and the fragile spherical shell 32, the fragile spherical shell 32 is wrapped at the outermost side, one end of the extension-assisting oil-guiding rod 34 is connected with the self-heating inner core 31, and the other end thereof penetrates through the self-heating inner core 31 and is connected with the separation ball 2, the fragile spherical shell 32 plays a role of separating the self-heating inner core 31 from air in a normal state, and when the anticorrosive coating is damaged, the fragile spherical shell 32 is also broken at the same time and does not block the gas storage bag 21, the gas in the gas storage bag 21 rushes out and wraps the separation powder 33 and is released to the damaged part or even to the surface of the coating, the self-heating inner core 31 is used for triggering an oxidation reaction with the oxygen after the protective gas drives away the air, and further providing, the extending-assisting oil guide rod 34 can force the self-heating inner core 31 to extend to the damaged part after losing the shaping effect of the fragile spherical shell 32, and guide the anti-rust oil to be highly filled, so that the ink is formed to realize high isolation.

The self-heating inner core 31 is made of self-heating materials, the fragile spherical shell 32 is made of fragile materials, the isolation powder 33 is colored aluminum powder with the filling rate of 30-50%, the extension-assisting oil guide rod 34 is made of elastic oil guide materials, the self-heating materials can react with oxygen in the air and release heat, the fragile spherical shell 32 is easily broken when being subjected to mechanical impact, a good impact sensing effect can be achieved, the colored aluminum powder can prompt technical staff that an anticorrosive coating is damaged, meanwhile, the aluminum powder can also be filled in the damaged part, an oxidation reaction can be replaced to form a compact aluminum oxide film, and therefore the isolation effect is improved in an auxiliary mode.

Example 2:

s1, removing rust, oil stains and pollutants on the surface of the steel structure by adopting a mechanical treatment or chemical treatment mode, and preheating to 180 ℃;

s3, preserving heat at 160 ℃ after cladding, preparing an anticorrosive paint when the laser cladding coating is not completely cured, and uniformly doping the anticorrosive paint into the self-isolation reinforcing pipe 1 according to the density of 1/10 ml;

And step S1, polishing the surface of the steel structure to ST2 level, wherein the surface roughness Rz is 60-80 μm.

The laser process parameters adopted in the laser cladding process in the step S2 include: the laser power is 5000W, the laser scanning speed is 1800mm/min, the spot length is 8mm, the spot width is 4mm, and the lap joint rate is 55%.

The metallurgical powder in the step S2 comprises the following raw materials in percentage by weight: 1% of C, 20% of Cr, 0.8% of Si, 3% of Ni, 1.1% of Mn, 2% of Mo, 0.5% of Cu, 3% of W, 25% of Al, 12% of Zn and the balance of Fe.

The anticorrosive paint comprises the following raw materials in parts by weight: 25 parts of epoxy resin, 8 parts of kaolin, 2 parts of titanium dioxide, 0.8 part of white carbon black, 8 parts of n-butyl silicate, 1 part of defoaming agent, 2 parts of film-forming additive, 1.5 parts of thickening agent and 30 parts of propyl alcohol.

The remainder was in accordance with example 1.

Example 3:

s1, removing rust, oil stains and pollutants on the surface of the steel structure in a mechanical treatment or chemical treatment mode, and preheating to 200 ℃;

s3, preserving heat at 180 ℃ after cladding, preparing an anticorrosive coating when the laser cladding coating is not completely cured, and uniformly doping the anticorrosive coating into the self-isolation reinforcing pipe 1 according to the density of 1/10 ml;

The laser process parameters adopted in the laser cladding process in the step S2 include: the laser power is 10000W, the laser scanning speed is 3000mm/min, the spot length is 12mm, the spot width is 8mm, and the lap joint rate is 60%.

The metallurgical powder in the step S2 comprises the following raw materials in percentage by weight: 1.65% of C, 30% of Cr, 1.2% of Si, 4% of Ni, 1.7% of Mn, 2.8% of Mo, 0.8% of Cu, 6% of W, 30% of Al, 15% of Zn and the balance of Fe.

The remainder was in accordance with example 1.

The invention can isolate the surface of the steel structure from the external environment by combining laser cladding and anticorrosive coatings, and pre-embed a plurality of self-isolation reinforcing pipes 1 on the anticorrosive coating on the surface layer, thereby not only greatly improving the performance and strength of the anticorrosive coating, being not easy to scratch and impact cracks, but also providing damage isolation protection, when the anticorrosive coating is accidentally damaged, sensing is carried out by arranging the breakable sensing microspheres 3, the protective gas in the isolating ball 2 is released, the air entering the damaged part is driven, further diffusion erosion is avoided, then the broken sensing microspheres 3 are exposed out of the spontaneous heating inner core 31, and can generate heat by oxidation reaction with the oxygen in the external air, the heating triggering expansion action is carried out on the inside of the isolating ball 2, and the antirust oil is released to fill the damaged part, thereby realizing double isolation of moisture and air, effectively protect the steel structure from corrosion.

The above are merely preferred embodiments of the present invention; the scope of the invention is not limited thereto. Any person skilled in the art should be able to cover the technical scope of the present invention by equivalent or modified solutions and modifications within the technical scope of the present invention.

Claims

1. A steel structure self-isolation type anticorrosion process is characterized in that: the method comprises the following steps:

s3, preserving heat at 140-180 ℃ after cladding, preparing an anticorrosive paint when the laser cladding coating is not completely cured, and uniformly doping the anticorrosive paint into the self-isolation reinforcing pipe (1) according to the density of 1/10 ml;

2. The self-isolation type corrosion prevention process for the steel structure according to claim 1, which is characterized in that: and in the step S1, the surface of the steel structure is ground to ST2 level, and the surface roughness Rz60-80 μm.

3. The self-isolation type corrosion prevention process for the steel structure according to claim 1, which is characterized in that: the laser process parameters adopted in the laser cladding process in the step S2 include: the laser power is 1500W-10000W, the laser scanning speed is 600mm/min-3000mm/min, the light spot length is 4mm-12mm, the light spot width is 1mm-8mm, and the lap joint rate is 50% -60%.

4. The self-isolation type corrosion prevention process for the steel structure according to claim 1, which is characterized in that: the metallurgical powder in the step S2 comprises the following raw materials in percentage by weight: 0.2 to 1.65 percent of C, 11 to 30 percent of Cr, 0.5 to 1.2 percent of Si, 2 to 4 percent of Ni, 0.5 to 1.7 percent of Mn, 0.6 to 2.8 percent of Mo, 0.3 to 0.8 percent of Cu, 0.5 to 6 percent of W, 20 to 30 percent of Al, 10 to 15 percent of Zn and the balance of Fe.

5. The self-isolation type corrosion prevention process for the steel structure according to claim 1, which is characterized in that: the anticorrosive paint comprises the following raw materials in parts by weight: 20-30 parts of epoxy resin, 5-10 parts of kaolin, 1-3 parts of titanium dioxide, 0.5-1 part of white carbon black, 5-10 parts of n-butyl silicate, 0.5-1.5 parts of defoaming agent, 1.5-2.5 parts of film-forming additive, 1-2 parts of thickening agent and 25-35 parts of propanol.

6. The self-isolation type corrosion prevention process for the steel structure according to claim 1, which is characterized in that: inlay in the reinforcement pipe (1) from keeping apart and be connected with a plurality of evenly distributed's isolation ball (2), isolation ball (2) outer end opening part is connected with perception microballon (3), and perception microballon (3) are located from keeping apart reinforcement pipe (1) surface.

7. The steel structure self-isolation type corrosion prevention process according to claim 6, characterized in that: the isolation ball (2) comprises a gas storage bag (21), a gas storage bag (22) and a phase change sleeve (23), one end of the gas storage bag (21) is connected with the sensing microsphere (3), the phase change sleeve (23) is embedded between the gas storage bag (21) and the gas storage bag (22), and the gas storage bag (22) is wrapped on the outermost side.

8. The self-isolation type corrosion prevention process for the steel structure according to claim 7, which is characterized in that: the gas storage bag (21) is filled with highly compressed protective gas, the protective gas is argon, nitrogen, helium or carbon dioxide, the oil storage bag (22) is filled with anti-rust oil, and the phase change sleeve (23) is filled with hot melt material.

9. The steel structure self-isolation type corrosion prevention process according to claim 6, characterized in that: the sensing microsphere (3) comprises a self-heating inner core (31), a fragile spherical shell (32), isolating powder (33) and an extension-assisting oil guide rod (34), wherein the isolating powder (33) is filled between the self-heating inner core (31) and the fragile spherical shell (32), the fragile spherical shell (32) is wrapped on the outermost side, one end of the extension-assisting oil guide rod (34) is connected with the self-heating inner core (31), and the other end of the extension-assisting oil guide rod penetrates through the self-heating inner core (31) and is connected with the isolating ball (2).

10. The steel structure self-isolation type corrosion prevention process according to claim 9, characterized in that: the self-heating inner core (31) is made of a self-heating material, the fragile spherical shell (32) is made of a brittle material, the isolation powder (33) is colored aluminum powder with the filling rate of 30-50%, and the extension-assisting oil guide rod (34) is made of an elastic oil guide material.