Fluoropolymer anticorrosive coating for fastener and preparation method thereof

An anti-corrosion coating and fastener technology, applied in anti-corrosion coatings, coatings, epoxy resin coatings, etc., can solve the problems of poor corrosion resistance and single function, and achieve long service life, simple preparation process, and coating resistance. Corrosion-enhancing effect

Active Publication Date: 2013-10-09
725TH RES INST OF CHINA SHIPBUILDING INDAL CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to overcome the shortcomings of the prior art, and to design and propose a fluorine-containing polymer fastener anti-corrosion organic coating and its preparation process for the problems of single function and poor corrosion resistance of fasteners in harsh marine corrosion environments , especially a fluorine-containing polymer fastener anti-corrosion coating and its preparation method, in order to improve its anti-corrosion performance and prolong the anti-corrosion life. Density, better water resistance, better insulation, can avoid electrochemical corrosion caused by contact between fasteners and dissimilar metals, by adding lubricating micro-powder, the fasteners are easy to assemble and disassemble, by adding adhesion promoters Further improve the wet adhesion of the coating and improve the corrosion resistance of the coating

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0009] In this embodiment, polyamideimide is first dissolved in N-methylpyrrolidone, and its weight percent concentration is 5%, to prepare a bonding primer, and then the novolac resin and o-cresol with a mass ratio of 2:5 Epoxy resin is dissolved in a mixed solvent prepared by butanone and n-butanol at a mass ratio of 4:1 to form a resin solution with a concentration of 50% by weight. The resin mixture accounts for 79% of the solid content; and then a predetermined amount of PTFE micropowder with a particle size of 120nm, fumed silica, mica powder with a particle size of 1700 mesh, epoxy phosphate, and a toughening agent were added to the resin solution, so that the PTFE micropowder accounted for 5% of the solids, and the fumed silica accounted for 5% of the solids. 0.5% of the weight, mica powder 5% of the solid weight, epoxy phosphate ester 0.5% of the solid weight, toughening agent 10% of the solid weight; Dilute the mixed solvent prepared at 4:1 to 45% solid content, then...

Embodiment 2

[0011] In this embodiment, polyamideimide is first dissolved in N-methylpyrrolidone, and its weight percent concentration is 10%, to prepare an adhesive primer; Epoxy resin is dissolved in a mixed solvent prepared by butanone and n-butanol at a mass ratio of 3:1 to form a resin solution with a concentration of 50% by weight. The resin mixture accounts for 35% of the solid content; and then a predetermined amount of PTFE micropowder with a particle size of 120nm, fumed silica, mica powder with a particle size of 3000 mesh, epoxy phosphate, and a toughening agent were added to the resin solution so that the PTFE micropowder accounted for 17.5% of the solids, and the fumed silica accounted for 17.5% of the solids. 1.0% of the weight, mica powder accounts for 20% of the solid weight, epoxy phosphate ester accounts for 1.5% of the solid weight, and toughening agent accounts for 15% of the solid weight; Dilute the mixed solvent prepared at 3:1 to 45% solid content, then add defoamer...

Embodiment 3

[0013] In this embodiment, polyamideimide is first dissolved in N-methylpyrrolidone, and its weight percent concentration is 15%, to prepare a bonding primer; then the mass ratio of novolac resin and o-cresol Epoxy resin is dissolved in a mixed solvent prepared by butanone and n-butanol at a mass ratio of 1:1 to form a resin solution with a concentration of 50% by weight. The resin mixture accounts for 37% of the solid content; and then a predetermined amount of PTFE micropowder with a particle size of 120nm, fumed silica, mica powder with a particle size of 2300 mesh, epoxy phosphate, and a toughening agent were added to the resin solution, so that the PTFE micropowder accounted for 30% of the solids, and the fumed silica accounted for 30% of the solids. 2.0% of the weight, mica powder accounts for 10% of the solid weight, epoxy phosphate ester accounts for 1% of the solid weight, and toughening agent accounts for 20% of the solid weight; Dilute the mixed solvent prepared at ...

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Abstract

The invention belongs to the technical field of preparation of anticorrosive coatings, and relates to a fluoropolymer anticorrosive coating for a fastener and a preparation method thereof. The preparation method comprises the following steps of: selecting N-methyl pyrrolidone dissolving liquor of polyamide-imide as a bonding primer, wherein the fluoropolymer novolac epoxy resin paint is anticorrosive finishing coating; first, brushing and curing the primer on the fastener, and then, brushing the coating of the finishing coating; drying the primer coating of polyamide-imide for 1-2 hours at 100-150 DEG C, and curing for 3-60 minutes at 280-340 DEG C; naturally drying the finishing coating prepared by novolac epoxy resin at normal temperature, then, drying for 0.5-3 hours at 50-90 DEG C, and curing for 0.5-2 hours at 180-200 hours to prepare the anticorrosive coating. The coating is simple in integral preparation process, easy to obtain raw materials, environment-friendly in preparation environment, good in anticorrosive performance of the product, long in service life, low in cost and good in economic benefit.

Description

Technical field: [0001] The invention belongs to the technical field of anti-corrosion coating preparation, and relates to a chemical composition and a preparation method of an anti-corrosion coating for a fluorine-containing polymer fastener, in particular to an anti-corrosion coating for a fluorine-containing polymer fastener and a preparation method thereof. Background technique: [0002] Ship fasteners are prone to corrosion in marine environments, including electrochemical corrosion under the action of C1- ions, stress corrosion under tensile stress, and galvanic corrosion when in contact with dissimilar metals; The fastener loses its fastening function, causing potential accident hazards, and is usually the leading cause of major mechanical accidents; in addition, the severe corrosion of fasteners also makes it difficult to disassemble, causing considerable difficulties in maintenance and replacement. At present, the anti-corrosion coating of ship fasteners mostly adop...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D179/08C09D163/00C09D163/04C09D127/18C09D5/08
Inventor 王利蔺存国许立坤
Owner 725TH RES INST OF CHINA SHIPBUILDING INDAL CORP
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