Protective cover for corrosion prevention and corrosion repair, and application thereof

A corrosion protection and protective cover technology, applied in water conservancy projects, marine engineering, water conservancy engineering equipment and other directions, can solve the problem of reducing the bonding strength and anti-corrosion performance between paint and steel surface, and is not suitable for repairing steel structures in the sea, and protection such as painting paint. Difficulties and other problems, to achieve the effect of saving manpower and material resources, simple structure and good mechanical properties

Inactive Publication Date: 2008-10-01
INST OF OCEANOLOGY - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Especially for the existing steel structures, after the corrosion of the steel in the splash area and tidal range area, it is difficult to protect such as painting paint, even if the coating with water is used, when the first coating reaches the anti-corrosion period In the second or more times of construction, since the surface of marine steel facilities cannot meet the requirements of re-spraying operations, the anti-corrosion effect of the first coating will be far behind, and the anti-corrosion period will be longer than the first time. Shorter and will get shorter, while the cost will be higher and higher
[0007] In the tidal range area, due to the short time interval between ebb

Method used

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  • Protective cover for corrosion prevention and corrosion repair, and application thereof
  • Protective cover for corrosion prevention and corrosion repair, and application thereof
  • Protective cover for corrosion prevention and corrosion repair, and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] The protective cover consists of an anti-fouling material layer 10, a high-strength protective material layer 9, a polyester non-woven fabric layer 8 and an anti-rust grease layer 7 from the outside to the inside (see figure 1 ); The protective sleeve 1 has a connecting portion 2 in the axial direction, and two opposite sides of the connecting portion are provided with folded edges 3 that are upwardly tilted.

[0027] The connecting portion 2 is provided with a hole 4, and a bolt 5 is inserted into the hole 4 to fasten the inner layer of the protective sleeve and the steel material 6 to be protected.

[0028] The anti-fouling material, high-strength protective material and the polyester non-woven fabric are bonded into one body with an adhesive, and then anti-rust grease is applied to the polyester non-woven fabric to form an anti-rust of about 1 mm Grease layer. There is a covering paper (not shown in the figure) on the surface of the inner anti-rust grease, which is torn...

Embodiment 2

[0033] The antifouling material in the protective cover can also be: silicone coating, fluorocarbon coating, polytetrafluoroethylene, polyperfluoroethylene propylene, tetrafluoroethylene-perfluorovinyl ether copolymer or polycarbonate with a molecular weight of 3-8 million Ethylene; high-strength protective material: nylon reinforced neoprene or polyurethane resin; anti-rust grease: containing mineral grease, oil-soluble corrosion inhibitor, antioxidant and anticorrosive agent and metal passivator, of which oil-soluble corrosion inhibitor The agent is one or more of metal sulfonates, metal carboxylic acid soaps and lanolin soaps, and the antioxidant and anticorrosive agent is thion octyl alcohol zinc salt or phosphoric acid fatty alcohol zinc salt or thion phosphorated alkene calcium salt , The metal deactivator is a benzotriazole derivative (T551) or a thiadiazole derivative (T561).

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PUM

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Abstract

The invention relates to a corrosion prevention technique, especially to a corrosion prevention and repairing protective cover and uses thereof. The protective cover consists of an anti-soil material layer, a protection material layer, a polyester nonwoven cloth layer as well as a rust protection lipin layer from exterior to interior. A connection part is opened on the axial direction of the protective cover, two opposite sides of the connection part is equipped with an outward turnup edge fold. The inventive protective cover is convenient for dissembling, can be repeatedly used after opening and check-up, in addition, the covering layer can also endure slight damnification, and will not denaturate in the seawater surroundings after mounting. The invention not only is suitable for new sea steel construction article antisepticise and anti-soil, but also suitable for repairs of the corroded steel construction article. Thus the economy effective handy construction protection method, ensures normal work of dirt-proof boot and facilities, reduces maintenance cost, saves manpower and material resources, and improves durability.

Description

Technical field [0001] The invention relates to corrosion protection technology, in particular to a protective cover for corrosion protection and repair and its application. Background technique [0002] The steel structure exposed to the marine environment reacts electrochemically with the surrounding seawater medium to be corroded, and the cyclic movement of the water body such as wind, waves, currents, and tides in the ocean not only increases the dissolved oxygen content in the seawater, but also makes it at the same time Withstand the effect of alternating loads. Marine steel structures, such as marine oil production platforms, steel pile wharfs, trestle bridges, mooring piers and light beacons, must resist severe corrosion damage, such as strong wave impact and years of seawater corrosion. [0003] In the splash area, the steel surface is often wet and dry due to the periodic wetting of seawater. The oxygen supply is sufficient and the salt is continuously concentrated. At ...

Claims

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Application Information

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IPC IPC(8): E02B1/00E02B3/00
Inventor 李言涛
Owner INST OF OCEANOLOGY - CHINESE ACAD OF SCI
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