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Marine component protective coating and construction method thereof

A technology of protective coating and construction method, applied in the field of protective coating of marine components and its construction, can solve the problems of adhesion, toughness and corrosion resistance that cannot meet long-term use and other problems

Inactive Publication Date: 2014-10-08
南通河海大学海洋与近海工程研究院 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Chinese patent (200810190125.X) introduces a heavy-duty concrete structure anti-corrosion nano-composite coating and its protection method. The coating consists of nano-modified epoxy sealing coating, nano-modified epoxy miracic iron intermediate paint and nano-modified fluorine-containing polyurethane The composition of the topcoat is improved compared with the traditional anti-corrosion life, but the strength, adhesion, toughness and corrosion resistance of the coating still cannot meet the requirements of long-term use.

Method used

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  • Marine component protective coating and construction method thereof
  • Marine component protective coating and construction method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Use sandpaper to polish the steel plate and remove rust, then ultrasonically clean in acetone for 2 minutes, ultrasonically clean in anhydrous ethanol / water (volume ratio 1:1) saturated sodium hydroxide solution for 2 minutes, and ultrasonically clean in chloroform for 2 minutes. Rinse well. Pass high-purity nitrogen in an aqueous solution containing 0.1 mol / L pyrrole and 0.1 mol / L sodium dodecyl sulfonate for 10 minutes, use steel plate as working electrode, saturated calomel electrode as reference electrode, and graphite plate as auxiliary electrode. Potentiostatic polymerization at 0.8V for 2 minutes to obtain a polypyrrole film with a thickness of 10μm; then 3 coats of ES301 solvent-free epoxy resin coating from Youlong (Beijing) Heavy Anti-corrosion Coating Co., Ltd. were applied and cured for 24 hours. The dry film thickness was 800μm, and then brush 2 coats of Shandong Keyao Chemical Co., Ltd. VA-1018 epoxy acrylic topcoat, leave it to cure for 36 hours, the dry f...

Embodiment 2

[0021] Use sandpaper to polish the steel plate to remove rust, then ultrasonically clean in acetone for 2 minutes, ultrasonically clean in anhydrous ethanol / water (volume ratio 1:1) saturated sodium hydroxide solution for 5 minutes, and ultrasonically clean in chloroform for 3 minutes, Rinse well. In an aqueous solution containing 0.1 mol / L pyrrole and 0.1 mol / L sodium dodecyl sulfonate, pass high-purity nitrogen for 5 minutes, use the steel plate as the working electrode, the saturated calomel electrode as the reference electrode, and the steel plate as the auxiliary electrode. Potentiostatic polymerization at 0.9V for 3 minutes to obtain a polypyrrole film with a thickness of 25μm; then 3 coats of Huachuan HCH01-18 epoxy resin coating were applied and cured for 24 hours, the dry film thickness was 600μm, and then 2 coats of Tianjin Andron Technology company DM-102 epoxy acrylic topcoat, placed and cured for 36 hours, the dry film thickness of the coating is 130μm.

[0022] Aft...

Embodiment 3

[0024] Pre-grind the workpiece with sandpaper to remove rust, then ultrasonically clean in acetone for 1 min, ultrasonically clean in anhydrous ethanol / water (volume ratio 1:1) saturated sodium hydroxide solution for 3 minutes, and ultrasonically clean in chloroform for 3 minutes. Rinse well. Pass high-purity nitrogen in an aqueous solution containing 0.1mol / L pyrrole and 0.1mol / L sodium dodecyl sulfonate for 3 minutes, use steel plate as working electrode, saturated calomel electrode as reference electrode, and platinum plate as auxiliary electrode. Potentiostatic polymerization at 1.0V for 5 minutes to obtain a polypyrrole film with a thickness of 30μm; then spray Akzo Nobel Powder Coating Ningbo Co., Ltd. epoxy powder coating for 2 coats, cure at 180°C for 20 minutes, and dry film thickness of 240μm. Two coats of XJ-4003 polyurethane acrylic paint from Sichuan Xingyuan Special Coating Co., Ltd., with a dry film thickness of 400μm.

[0025] After the above-mentioned painting c...

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Abstract

The invention discloses a marine component protective coating and a construction method thereof. The protective coating has a three-layer structure, wherein the bottom layer is a polypyrrole thin film which is polymerized on the surface of a steel component via an electrochemical method; the middle layer is an epoxy coating; the surface layer is one of polyurethane acrylate coating, epoxy acrylate coating and polyurea coating. The construction method comprises the steps of polishing a workpiece, then polymerizing the polypyrrole thin film on the surface at constant potential and sequentially coating the workpiece with the epoxy coating and the surface layer. The marine component protective coating has favorable binding force, is excellent in rotproofness and weather fastness, is long in service life in marine environment and can be applied to the long-acting protection of marine components.

Description

Technical field [0001] The invention belongs to the technical field of marine heavy-duty anticorrosion coatings, and particularly relates to a protective coating for marine engineering components and a construction method thereof. Background technique [0002] In recent years, with the advancement of ocean development, Hangzhou Bay Bridge, Zhoushan Bridge, Qingdao Bay Bridge, etc. have been built one after another, and various other offshore survey platforms, oil production platforms, and offshore oil and gas gatherings that have been built, under construction and planned Marine projects such as pipelines, ships, ports and docks, and cross-sea bridges have sprung up, and there is an urgent need for heavy-duty 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, including epoxy, polyester, polyurethane, alkyd resin, phenolic resin, fluorocarbon resin, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B27/06C25D9/02
Inventor 李保松张薇薇张磊于洋
Owner 南通河海大学海洋与近海工程研究院
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