Maintenance method of heavy-duty anti-corrosion seal wrapping on the surface of steel components

A steel component, heavy-duty anti-corrosion technology, which is applied in the field of heavy-duty anti-corrosion seal wrapping protection on the surface of steel components, and in the field of steel structure surface corrosion protection, which can solve problems such as lack of bonding strength, unsatisfactory, high cost

Active Publication Date: 2020-01-21
上海岐海防腐工程技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since the promotion and application of the above technology, good protective effect has been achieved, but there are still some problems. The anti-corrosion paste has a certain fluidity, and does not have bonding strength after contacting the substrate; the same is true for the anti-corrosion tape, which only depends on the wrapping effect It is attached to the surface of the substrate, and the durability of the surface armor, sheath or polyester resin gel coat can no longer meet the protection requirements of the project above 20a, and the labor intensity of the on-site operators is relatively high, and the cost is relatively high. For large-scale The above problems are more prominent when the components, large planes or special-shaped components

Method used

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  • Maintenance method of heavy-duty anti-corrosion seal wrapping on the surface of steel components
  • Maintenance method of heavy-duty anti-corrosion seal wrapping on the surface of steel components
  • Maintenance method of heavy-duty anti-corrosion seal wrapping on the surface of steel components

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1-2

[0068] Processing and preparation of quick-drying zinc-rich silane-modified polymer sealant, the raw material composition and weight parts of the quick-dry zinc-rich silane-modified polymer sealant in Example 1-2 are shown in Table 1, wherein SAX510 is Japanese Kanka Sanjia Oxygen-terminated silane-modified polymer resins, STP and SPUR trimethoxy-terminated silane-modified polymer resins are alkaline resins with a pH value, and the amount of basic additives can be reduced accordingly.

[0069] Table 1 Example 1-Example 2 The composition of each raw material and parts by weight Unit: parts by weight

[0070]

[0071] Weigh each raw material according to the weight part of the material in Table 1, first use the connection N 2 The pipeline of the storage device is slowly and continuously filled with clean and dry N into the clean and dry double planetary mixer tank 2 , then first put the non-alcoholic plasticizer into it, then add highly active silane-modified polymer resin, ...

Embodiment 3-5

[0077] Preparation of vulcanized aluminum-rich silane-modified polymer sealant. See Table 3 for the raw material composition and parts by weight of the vulcanized aluminum-rich silane-modified polymer sealant in Examples 3-5.

[0078] Table 3 The composition and parts by weight of each material in Embodiment 3-5 Unit: parts by weight

[0079]

[0080] Weigh each material according to the weight of vulcanized aluminum-rich silane-modified polymer sealant materials in Table 3, first put the silane-modified polymer resin into a clean and dry double planetary mixer, and then add hydrophobic fumed silica, Nano-calcium carbonate, cellulose acetate butyrate, heat stabilizer 1010, 50-70% by weight of vinyltrimethoxysilane, vacuumize and stir and disperse at a speed of 50-100rpm for 10-30min; then gradually heat to 50- 70°C, stir at a high speed of 1000-1500rpm for 30-90min, until the sealant paste is fine and uniform, then cool it down to below 40°C; then add non-leafing flake alum...

Embodiment 6

[0083] Such as figure 1 As shown, the surface heavy-duty anti-corrosion seal wrapping maintenance method of steel components in a petrochemical plant, the specific steps are as follows:

[0084] The first step substrate treatment

[0085] Firstly, remove the heavy-duty anti-corrosion coating of the steel component base 1 that has failed, peeled off, etc., and manually polish and clean the surface rust and other pollutants, and the surface cleanliness reaches St3 level.

[0086] The second step is to prepare the inner sealing protective layer

[0087] After the surface of the substrate is cleaned and dried, immediately apply a layer of fast-drying zinc-rich silane modified polymer sealant in Example 1, and fill and scrape the corrosion pits, defects, and rough surfaces on the surface of the steel component substrate 1 caused by corrosion to form The inner sealing protective layer 2 has an average thickness of about 0.1-0.5mm.

[0088] The third step is to prepare the outer s...

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Abstract

The invention discloses a heave duty anticorrosion sealing wrapping maintenance method for the surface of a steel component. an originally invalided corrosion prevention material of a substrate is clear away firstly, the surface rust and other pollutants are cleaned, the surface cleanliness reaches an Sa2 level or the same degree, then a quick-drying type zinc-rich silane modified polymer sealantis brushed or scraped, brush coating or scrape coating of a vulcanized silicon-rich silane modified polymer sealant is carried out, and finally scrape coating of a PVF adhesive tape is carried out. The method has the advantages of low surface treatment, corrosion and corrosion resistance sealing, and has the comprehensive characteristics of heat resistance, weather resistance and pollution resistance, on-site operation is simple, fast, efficient, free of dead corners, good in sealing and wrapping appearance decoration performance, and capable of providing the protection life of 20 a or above of the steel component which the steel component is worked in a special harsh corrosion environment such as a heavy-pollution chemical environment, a marine tidal zone and the like, the economic loss caused by frequent maintenance in the fields of a chemical plant, marine engineering and the like is avoided, and the accident risk and abnormal shutdown loss caused by corrosion of equipment or the engineering are avoided.

Description

technical field [0001] The invention relates to a steel structure surface corrosion protection technology, in particular to a heavy-duty anti-corrosion sealing wrapping protection method on the surface of a steel component, which belongs to the technical field of anti-corrosion engineering. Background technique [0002] ISO 12944-2:2017 "Paints and varnishes - Corrosion protection of steel structures by protective paint systems - Part 2: Environmental classification" divides the corrosive environment into 6 atmospheric environment corrosive levels (C1, C2, C3) according to ISO9223 , C4, C5, CX) and 4 structural immersion or buried corrosion levels (Im1, Im2, Im3 and Im4), among which industrial areas with extremely high humidity and aggressive atmospheres, offshore areas with high salinity are all It belongs to the extreme corrosion level CX. In real life, metallurgical and petrochemical enterprises and marine engineering steel structures are basically in the environment of ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B65D81/24B65B63/00B65B11/00
Inventor 晁兵李承宇安云岐杜彬贾继华杨棕凯曹辉王小六
Owner 上海岐海防腐工程技术有限公司
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