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Inorganic graphene antibacterial alga-resistant zinc-rich anticorrosive coating and preparation method thereof

A technology of anti-corrosion coatings and graphene, applied in anti-corrosion coatings, anti-fouling/underwater coatings, alkali metal silicate coatings, etc., can solve problems such as easy reunion and insufficient long-term algae resistance, and achieve overcoming easy reunion, Improve the effect of cathodic protection and extend the effect of shielding path

Inactive Publication Date: 2019-12-03
SHENZHEN ACAD OF AEROSPACE TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] In view of the deficiencies in the prior art, one of the objectives of the present invention is to provide an inorganic graphene antibacterial anti-algae zinc-rich anti-corrosion coating, which overcomes the problems of easy agglomeration and insufficient long-term algae resistance in the presence of nano-inorganic anti-algae agents. The layer is dense and less porous, with excellent anti-corrosion properties

Method used

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  • Inorganic graphene antibacterial alga-resistant zinc-rich anticorrosive coating and preparation method thereof
  • Inorganic graphene antibacterial alga-resistant zinc-rich anticorrosive coating and preparation method thereof

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Embodiment 1

[0029] The present embodiment provides a kind of inorganic graphene antibacterial anti-algae zinc-rich anticorrosion coating, which is prepared according to the following steps:

[0030] (1) Preparation of silicate solution: take raw materials potassium hydroxide, silica sol and water, wherein the molar ratio of potassium hydroxide, silica sol and water is 1:10:6. Pre-mix and dissolve potassium hydroxide and water to obtain a potassium hydroxide solution, then gradually add the potassium hydroxide solution dropwise to the silica sol under rapid stirring, and react for 1 hour at a water bath temperature of 50°C to prepare a silicate High modulus potassium silicate solution with a modulus of 4.5.

[0031] (2) Preparation of stable high modulus silicate: according to the mass ratio of high modulus potassium laurate solution: silane coupling agent: silicon acrylic emulsion is 1:0.5%: (2% ~ 5%) ratio, weigh Silane coupling agent KH-560 and silicon acrylic emulsion are slowly added...

Embodiment 2

[0037] The present embodiment provides a kind of inorganic graphene antibacterial anti-algae zinc-rich anticorrosion coating, which is prepared according to the following steps:

[0038] (1) Preparation of silicate solution: take raw materials sodium hydroxide, potassium hydroxide, silica sol and water, wherein the molar ratio of sodium hydroxide, potassium hydroxide, silica sol and water is 0.3:0.7:14:10. Sodium hydroxide, potassium hydroxide and water are premixed and dissolved to obtain a mixed solution, and then, under rapid stirring, the mixed solution is gradually added dropwise to the silica sol, and the reaction time is 1 hour at a water bath temperature of 50 ° C. The prepared modulus is 6.5 Silicate solution.

[0039] (2) Preparation of stable high modulus silicate: according to the mass ratio of high modulus sodium silicate solution: silane coupling agent: silicon acrylic emulsion is 1:0.5%: (2% ~ 5%), weigh Silane coupling agent KH-560 and silicone acrylic emulsio...

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Abstract

The invention discloses an inorganic graphene antibacterial alga-resistant zinc-rich anticorrosive coating and a preparation method thereof. The inorganic graphene antibacterial alga-resistant zinc-rich anticorrosive coating comprises 30-50 wt% of a stable high-modulus silicate, 0.1-2 wt % of graphene, 40-69 wt% of zinc powder, 0.1-5 wt% of a modified composite antibacterial alga-resistant agent,and 0.1-3 wt% of a coating auxiliary agent, wherein the stable high-modulus silicate is prepared by carrying out a reaction of a silicate, a silane coupling agent and a silicone-acrylic emulsion, themodulus of the silicate is 4.5-7.0, the zinc powder is flake zinc powder and granular zinc powder, the modified composite antibacterial alga-resistant agent is prepared by modifying a composite antibacterial alga-resistant agent with a surface modifier, the surface modifier is an organic silane coupling agent, and the compound antibacterial alga-resistant agent is formed by loading an antibacterial alga-resistant agent on an inorganic porous carrier. By adding anticorrosive fillers such as graphene, the flake zinc powder and the granular zinc powder, and the composite antibacterial alga-resistant agent functional filler, a formed coating layer of the coating is dense, and has relatively few pores, and improvement of a service life of the anticorrosive coating is realized.

Description

technical field [0001] The invention relates to the technical field of anti-corrosion coatings, in particular to an inorganic graphene antibacterial anti-algae zinc-rich anti-corrosion coating and a preparation method thereof. Background technique [0002] Coating anti-corrosion is an important means of steel anti-corrosion. With the development of the industry and the improvement of environmental quality requirements, anti-corrosion coatings are developing from a single steel protection function to high performance, water-based environmental protection and multi-function. Water-based inorganic zinc-rich anti-corrosion coating has good static conductivity and excellent welding performance. It is reported that its single-coat salt spray resistance exceeds 4000h, which is much higher than 1000h of epoxy zinc-rich anti-corrosion coating. However, the main disadvantage of water-based inorganic zinc-rich anti-corrosion coatings is that high zinc powder additions will lead to poro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D1/04C09D5/14C09D5/10C09D5/16C09D7/63C09D7/65
CPCC09D1/04C09D5/106C09D5/14C09D5/1618C09D5/1625C09D5/1687
Inventor 陈英刘海涛晏义伍
Owner SHENZHEN ACAD OF AEROSPACE TECH
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