CN-121988514-A - Application of polyphenol self-reinforced black anti-corrosion coating on steel structure quick-speed vehicle bridge

Abstract

The invention discloses application of a natural photosensitive self-reinforced black anti-corrosion coating on a steel structure quick-passing axle, belonging to the field of steel structure bridge protection. The core technology of the invention 1 of the fusion paint group is applied, and a four-layer integrated protection system with the total dry film thickness of 180-240 mu m is formed through five-step construction of steel structure substrate shot blasting pretreatment (Sa2.5 grade, roughness of 50-80 mu m), epoxy zinc-rich primer (60-80 mu m), epoxy cloud iron middle coating (80-100 mu m), natural photosensitive self-reinforced top coating (40-60 mu m) and 7-10 days curing. The core surface is coated with light and oxygen to realize self-deepening of color and self-strengthening of protection, and a full life cycle zero-operation-maintenance coating system which is suitable for rapid construction in 15 days and has a design life of 100 years is constructed. The invention is suitable for rapid construction of bridges by curing at normal temperature, the protection and self-reinforcement of the coating, the operation and maintenance cost is greatly reduced, the construction process is conventional and easy to popularize, and the invention is a high-end landing scheme of the natural photosensitive self-reinforcement core technology on the foundation of a large-scale steel structure.

Inventors

• CHEN HONGYIN
• CHEN QINGLIAN
• CHEN HONGZHEN

Assignees

• 新疆顺安众达交通技术服务有限公司

Dates

Publication Date

20260508

Application Date

20260308

Claims (3)

1. 1. The application of the natural photosensitive self-reinforced black anti-corrosion coating on the steel structure quick-pass axle is characterized by comprising the following construction steps of carrying out shot blasting on the surface of a steel member of the steel structure quick-pass axle, wherein the rust cleaning grade reaches Sa2.5, the surface roughness is controlled to be 50-80 mu m, priming, spraying an epoxy zinc-rich primer on the surface of the pretreated steel member, wherein the dry film thickness is 60-80 mu m, curing for 12-24 hours at normal temperature, intermediate coating, spraying an epoxy iron-in-paint on the cured surface of the primer, wherein the dry film thickness is 80-100 mu m, curing for 12-24 hours at normal temperature, and top coating, wherein the natural photosensitive self-reinforced black coloring material is sprayed on the cured surface of the intermediate coating, the dry film thickness is 40-60 mu m, curing for 24-48 hours at normal temperature, and the finished product is a full-coating protection system for curing the steel structure quick-pass axle.
2. 2. The use according to claim 1, wherein the total dry film thickness of the primer, the mid-coat and the top-coat is 180-240 μm.
3. 3. The application of claim 1, wherein the natural photosensitive self-reinforced black anticorrosive top coating contains natural photosensitive active components such as polyphenols, tannins, flavonoids and the like, and the natural photosensitive active components are subjected to continuous oxidative polymerization under the action of outdoor light and oxygen to realize self-deepening of color, self-improvement of compactness and self-reinforcement of protective performance, thereby forming a self-repairing, self-reinforcement and full life cycle zero operation and maintenance high-end protective system of the steel structure fast-speed train bridge.

Description

Application of polyphenol self-reinforced black anti-corrosion coating on steel structure quick-speed vehicle bridge Technical Field The invention relates to the technical field of steel structure bridge protection, in particular to an anti-corrosion protection application of a natural photosensitive self-reinforced black coloring material on a steel structure quick passing bridge, which is applicable to a steel structure quick passing bridge surface integrated protection system with quick construction for 15 days and design life of 100 years, and is a high-end landing scheme of the natural photosensitive self-reinforced black coloring material in the field of large steel structure foundation construction. Background The steel structure quick passing bridge is an urban traffic core infrastructure, the core requirement is quick construction, the service life is extremely long, zero operation and maintenance are achieved, but the existing protection system has the fatal defects that the traditional black anti-corrosion paint has no self-enhancement characteristic, fading, chalking, protection and attenuation are achieved after 1-3 years, the operation and maintenance cost is more than 30% of the full life cycle, the paint repairing is required to seal a road, the concept is completely contrary to the concept of quick passing, the prior art only carries out small improvement on the paint, the natural photosensitive self-enhancement core technology is not combined to construct a protection system adapting to the full life cycle of the bridge, and the technical dimension is seriously mismatched with the high-end requirement of the infrastructure. Disclosure of Invention The invention aims to: The invention fuses the natural photosensitive self-reinforced core technology of the coating set invention patent 1 with the construction and service life requirements of the steel structure quick pass axle, provides a high-end application scheme of the core material on the steel structure quick pass axle, constructs a full life cycle zero-operation-maintenance coating system with quick construction for 15 days and ultra-long service life for 100 years, solves the industrial pain points with high fading, aging and operation-maintenance costs of the traditional protective coating from the technical root, and realizes the perfect combination of the basic construction protection and the high-end material technology. Technical proposal The application of the natural photosensitive self-reinforced black anti-corrosion coating on the steel structure quick pass axle comprises the following construction steps: 1. The steel structure base material pretreatment, namely performing shot blasting rust removal on the surface of a steel member of the steel structure rapid transit bridge, wherein the rust removal grade is Sa2.5 grade, the surface roughness is 50-80 mu m, and a super-strong adhesive force base is provided for a coating system; 2. spraying an epoxy zinc-rich primer, curing at normal temperature for 12-24 hours to form a long-acting antirust bottom layer of the substrate, wherein the thickness of the dry film is 60-80 mu m; 3. The middle coating construction comprises the steps of spraying an epoxy cloud iron middle coating, curing at normal temperature for 12-24 hours, forming a corrosive medium shielding layer, and enhancing the overall protection of a coating system, wherein the dry film thickness is 80-100 mu m; 4. Spraying a natural photosensitive self-reinforced black coloring material according to the patent 1 to 3 of the invention of the paint group on the middle coating curing surface, curing at normal temperature for 24 to 48 hours, wherein the dry film thickness is 40 to 60 mu m, and forming a natural photosensitive self-reinforced black anti-corrosion surface coating; 5. And (5) curing the finished product for 7-10 days to finish the construction of the full-coating protection system of the rapid through bridge of the steel structure. The total dry film thickness of the protection system is 180-240 mu m, the core surface is coated with a natural photosensitive self-reinforced black anti-corrosion coating, and under the effects of outdoor illumination and oxygen, the natural photosensitive active components (polyphenols, tannins, flavonoids and the like) contained in the natural photosensitive self-reinforced black anti-corrosion coating are subjected to continuous oxidative polymerization, so that the self-deepening of the color of the surface coating, the self-improvement of the compactness and the self-reinforcement of the protection performance are realized, and finally the self-repairing, self-reinforcement and full life cycle zero-operation and maintenance bridge high-end protection system is formed. Advantageous effects 1. The technology integration is that the bottom core self-reinforcing technology of the paint set invention patent 1 is combined with the depth of a bridge foundation, a technical marker po