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Long-acting protection multi-layer epoxy heavy-corrosion-prevention coating for sea steel structure and manufacturing method thereof

A technology of anti-corrosion coating and epoxy resin coating, which is applied in the direction of epoxy resin coating, coating, and the device for coating liquid on the surface, etc., can solve the problems that have not been effectively solved, so as to increase the compactness and overcome the Poor binding force, the effect of improving the coating binding force

Active Publication Date: 2014-08-20
HOHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The bonding force and weather resistance between the marine heavy-duty anti-corrosion coating and the metal interface are the key factors affecting the service life of the coating, but the above problems have not been effectively solved in the existing patents and open literature

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Firstly, prepare polyvalent carboxyl epoxy resin: in a reaction vessel, dissolve 22.6g of toluene diisocyanate (TDI) with 300ml of anhydrous toluene, and protect with nitrogen; dissolve 42g of E44 epoxy resin with 90ml of anhydrous toluene and transfer it to the constant pressure drop In the funnel, under the conditions of room temperature, stirring and nitrogen protection, add the E44 epoxy resin solution dropwise to the TDI toluene solution at a rate of 30 drops / min, then react at room temperature for 2 hours, raise the temperature to 120°C for 5 hours, and depressurize Distill, remove unreacted TDI, obtain TDI modified epoxy resin, move in the constant pressure dropping funnel under nitrogen protection, and add 60 milliliters of anhydrous N-methylpyrrolidone. Add 25g of citric acid and 80ml of anhydrous N-methylpyrrolidone that have been dehydrated in advance into a closed reaction vessel equipped with a thermometer, a stirrer and a condenser, stir until dissolved und...

Embodiment 2

[0035]Research on multi-layer epoxy heavy-duty anti-corrosion coating for ship deck and ballast tank in a shipyard in Yangzhou. First use an electric angle grinder to remove serious rust or dirt, and then use ultra-high pressure water jets to clean the surface to remove loose matter on the surface and obtain a clean pretreated surface. The surface is wet or the remaining part of the water film, with flash rust, etc. will not affect the bottom. Painted construction. Then spray 2 roads of the multi-component carboxyl epoxy primer prepared in Example 1, with a thickness of 60 μm, and dry for 24 hours; then spray 2 roads of Akzo Nobel Powder Coatings Ningbo Co., Ltd. solvent-free epoxy powder coating with a thickness of 250 μm and cure at 180 ° C. 20 minutes; Finally, spray one coat of PN-968T-52 polyurethane epoxy topcoat from Tianjin Paiernier Company, with a thickness of 100 μm.

[0036] After the above-mentioned coating construction, the total thickness of the paint film ...

Embodiment 3

[0038] The alkoxy silicon epoxy resin is prepared as follows: remove water, dry and purify toluene, epoxy resin and silane coupling agent. In a reaction vessel equipped with a thermometer, a stirrer and a condenser, dissolve 50g of E44 epoxy resin with 200ml of anhydrous toluene, and fill it with nitrogen protection; Dissolve, move to the constant pressure dropping funnel under the protection of nitrogen, add in the toluene solution of epoxy resin at a speed of 20 drops per minute, stir at room temperature for 2 hours, then heat up to the temperature of toluene reflux to continue the reaction for 2 hours, cool , Distilled under reduced pressure to remove the solvent to obtain an alkoxy silicon modified epoxy resin.

[0039] Research on multi-layer epoxy heavy-duty anti-corrosion coating for storage tanks in a cargo port in Jiangsu. First, use an electric angle grinder to grind to remove rust and dirt, remove surface loose matter, and obtain a clean pre-treated surface. Th...

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Abstract

The invention discloses a long-acting protection multi-layer epoxy heavy-corrosion-prevention coating for a sea steel structure and a manufacturing method of the long-acting protection multi-layer epoxy heavy-corrosion-prevention coating and belongs to the field of sea heavy corrosion prevention. The epoxy heavy-corrosion-prevention coating comprises three layers of structures which are a poly-carboxy epoxy resin coating body, a solvent-free epoxy coating body and acrylic epoxy finish coat or polyurethane epoxy finish cost or organic silicone epoxy finish coat or fluorocarbon finish coat. The multi-layer epoxy heavy-corrosion-prevention coating meets the low metal surface treatment requirement and can be constructed on a humid metal surface with rust, due to three-dimensional crosslinking curing and chemical bonding with a base material, the obtained coating interface bonding force is good, the crosslinking degree is high, the compactness is good, the weather resistance is excellent, the service life in a sea environment can reach more than 30 years, and the coating is simple in technology, easy to popularize and capable of being used for long-acting protection of seal steel and iron facilities.

Description

technical field [0001] The invention belongs to the technical field of marine heavy-duty anti-corrosion coatings, in particular to a multi-layer epoxy heavy-duty anti-corrosion coating for long-term protection of marine steel structures and a preparation method. Background technique [0002] In recent years, with the advancement of marine development, the Hangzhou Bay Bridge, Zhoushan Bridge, and Qingdao Bay Bridge have been built successively. Other offshore survey platforms, oil production platforms, and offshore oil and gas gathering platforms Marine projects such as pipelines, ships, port terminals, and cross-sea bridges have sprung up, and there is an urgent need for heavy-duty anti-corrosion coating technology with better marine anti-corrosion performance and longer service life. At present, heavy anti-corrosion coatings are mainly used to protect marine steel structures, mainly including epoxy, polyester, polyurethane, alkyd resin, phenolic resin, fluorocarbon resin, ...

Claims

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Application Information

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IPC IPC(8): B05D3/00B05D1/36C09D163/00C09D163/10C09D127/12
Inventor 李保松张磊于洋张薇薇
Owner HOHAI UNIV
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