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Graphene modified rust conversion anti-corrosive paint

A technology of graphene modification and anti-corrosion coating, applied in the field of coatings, can solve the problems of anti-corrosion coating, poor ability to prevent re-rusting, and contact requirements, etc., achieve good electrochemical characteristics, save materials and labor, The effect of good environmental performance

Inactive Publication Date: 2021-06-08
深圳市嘉达节能环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although rust conversion can achieve rust coating, and can convert the rust of the base material into a passive substance after coating, but because of its poor ability to prevent re-rust, it can only be used in places with low anti-corrosion requirements. For some iron towers, bridges and large steel structures, it is necessary to apply an anti-corrosion layer on them. However, due to the existence of rust conversion coating, the subsequent anti-corrosion coating cannot meet the requirements of contact with the steel structure, and the cathodic protection effect It is greatly affected, resulting in limited application in the field of anti-corrosion

Method used

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  • Graphene modified rust conversion anti-corrosive paint
  • Graphene modified rust conversion anti-corrosive paint

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042]Put 20 parts of water and 0.3 parts of defoamer into the paint mixing tank, stir evenly, then slowly add 5 parts of aluminum tripolyphosphate, 1 part of nano-silicon dioxide, and 8 parts of ferrophosphorus powder. After dispersing at a high speed for 25min under 2000rpm, reduce the rotating speed to 1200rpm, then add 1 part of tannic acid rust conversion agent (purchased from Wufeng Chicheng Biotechnology Co., Ltd.) and 10 parts of graphene slurry, wherein the graphene slurry is Disperse graphene with a sheet diameter of 1-20 μm in tert-butanol to prepare a suspension with a solid content of 5 wt%, continue stirring for 20 minutes, reduce the speed to 1000 rpm, then add 50 parts of styrene-acrylic emulsion and continue stirring for 15 minutes, Then add 2 parts of dodecyl alcohol esters as coalescent and 0.5 part of rheological additives, reduce the rotating speed to 600rpm, add 2 parts of tannic acid class rust conversion agent (purchased from Wufeng Chicheng Biotechnolog...

Embodiment 2

[0044] Put 30 parts of water and 0.2 parts of defoamer into the paint mixing tank, stir evenly, then slowly add 10 parts of aluminum tripolyphosphate, 2 parts of nano-titanium dioxide, and 5 parts of ferrophosphorus powder at high speed at 2500rpm After dispersing for 30min, reduce the rotating speed to 1500rpm, then add 2 parts of phosphoric acid-tannic acid composite rust conversion agent (the ratio of phosphoric acid and tannic acid is 10:1) and 8 parts of graphene slurry, wherein graphene slurry It is a suspension with a solid content of 4wt% prepared by dispersing graphene with a sheet diameter of 5-10 μm in isobutanol. After continuing to stir for 20 minutes, reduce the speed to 1000 rpm, and then add 45 parts of water-based epoxy resin to continue stirring 15min, then add 0.4 parts of rheological additives, reduce the speed to 600rpm, add 4 parts of phosphoric acid-tannic acid composite rust conversion agent (the ratio of phosphoric acid and tannic acid is 10:1), continu...

Embodiment 3

[0046] Put 25 parts of water and 0.5 parts of defoamer into the paint mixing tank, stir well, then slowly add 8 parts of aluminum tripolyphosphate, 1 part of nano-silica, 1 part of nano-titanium dioxide and 12 parts The filler of ferrophosphorus powder, after dispersing at high speed for 30min at 2500rpm, reduce the rotating speed to 1500rpm, then add 3 parts of chelating system rust conversion agent (DS-800 type, purchased from Tianjin Desen Chemical Materials Co., Ltd.) rust conversion agent and 5 parts of graphene slurry, wherein the graphene slurry is that the graphene with a sheet diameter of 5-10 μm is dispersed in isobutanol and the solid content is a suspension of 4wt%. After continuing to stir for 30min, reduce Rotate to 1000rpm, then add 40 parts of vinegar-acrylic emulsion and continue to stir for 15 minutes, then add 1.5 parts of dodecyl alcohol ester as a film-forming aid and 0.4 parts of rheology additive, reduce the speed to 600rpm, add 3 parts of chelate Combin...

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Abstract

The invention discloses a graphene modified rust conversion anti-corrosive paint, which is prepared from the following components in parts by weight: 30 to 50 parts of water-based resin, 1.0 to 6.0 parts of a rust conversion agent, 0.2 to 1.0 part of graphene, 5.0 to 10 parts of aluminum triphosphate, 5.0 to 15 parts of a filler, 0.2 to 0.6 part of a rheological additive, 0.2 to 0.5 part of a defoaming agent, 1.0 to 2.0 parts of a coalescing agent and 20 to 30 parts of water. The anti-corrosion paint can effectively convert rust on a steel base material, a shielding coating is formed on the surface of the base material, the anti-corrosion service life of the coating is prolonged, particularly, the anti-corrosion coating has good matching performance with a zinc-rich coating, and the formed composite coating has good electrochemical characteristics and plays a role in cathode protection. Therefore, the paint can be independently used and can also be matched with an epoxy zinc-rich coating for use, and the rust removal engineering difficulty in the maintenance process of bridges, electric towers, the petrochemical industry and large steel structure buildings is greatly reduced.

Description

technical field [0001] The invention belongs to the technical field of coatings, in particular to a rust conversion anticorrosion coating, more specifically a graphene-modified rust conversion anticorrosion coating. Background technique [0002] Iron and steel materials have the disadvantage of being easy to corrode. The commonly used anti-corrosion method is the coating method. Before coating, the metal surface needs to be derusted, and the derusting grade should usually reach at least Sa2.5. Traditional rust removal methods include mechanical rust removal, pickling rust removal, sandblasting rust removal, etc., which have the disadvantages of high cost, high work intensity, and environmental pollution, especially for post-maintenance of existing steel facilities. It is impossible to completely remove the rust. In this case, the coating of the anti-corrosion coating can not achieve the existing effect, which will cause a lot of labor and material waste, and bring certain sa...

Claims

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Application Information

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IPC IPC(8): C09D125/14C09D163/00C09D131/04C09D5/08C09D7/61C09D7/63
CPCC08K2003/327C08K2003/329C09D5/08C09D125/14C09D131/04C09D163/00C09D7/61C09D7/63C08K13/02C08K3/32C08K3/042C08K5/1545
Inventor 关有俊熊永强
Owner 深圳市嘉达节能环保科技有限公司