Corrosion-resistant neutral chrome-free coating agent and preparation method thereof

A technology of corrosion resistance and coating agent, applied in the field of chemicals, can solve the problems of large difference in corrosion resistance between silane film and phosphating film, long difference in corrosion resistance and corrosion resistance, and failure to achieve corrosion resistance. Achieve excellent physical properties and corrosion resistance, improve corrosion resistance, high corrosion resistance and the effect of salt spray time

Inactive Publication Date: 2018-03-06
广东锴力环保新材料有限公司
View PDF4 Cites 13 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Wang Shuanghong et al. (Material Protection, 2011, 44(5): 59-61) reported a nano-ceramic treatment agent, the nano-ceramic ZrO 2 The conversion coating enhances the adhesion between the substrate and the epoxy resin paint layer and polyurethane paint layer, which meets the painting requirements, but the salt spray test is not high
Organic matter passivation is mainly composed of water-soluble acrylic resin or silane coupling agent, such as Chinese patent publication number CN 1268583, but the corrosion resistance of the film is poor
Liu Yongping (Materials Protection, 2011, 46(5): 62-63) pretreated hot-dip galvanized steel sheet with silane KB-175, which can improve its bonding force with epoxy resin coating, but neutral salt The results of the fog test show that the corrosion resistance of the silane film and the phosphating film is quite different, which cannot meet the requirements of corrosion resistance
[0006] In summary, although researchers have developed a variety of chromium-free passivators, their corrosion resistance is far from that of the original chromate passivation film.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Corrosion-resistant neutral chrome-free coating agent and preparation method thereof
  • Corrosion-resistant neutral chrome-free coating agent and preparation method thereof
  • Corrosion-resistant neutral chrome-free coating agent and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] Mix 8 parts of low-viscosity hydroxypropyl methylcellulose, 2 parts of ethanol, 8 parts of 1,2-propanediol and 30 parts of water evenly and stir until dissolved, as material A;

[0043] Mix 2 parts of γ-aminopropyl triethoxysilane, 1 part of γ-glycidyl etheroxypropyl trimethoxysilane, 10 parts of nano-oxide sol and 30 parts of water, stir for 20-30 hours, as material B ;

[0044] Stir material A and material B evenly, then add 1 part of cerium sulfate and 3 parts of water, and adjust the pH value to 7 with 2 parts of pH regulator to obtain a chrome-free coating agent.

Embodiment 2

[0046] Mix 3 parts of polyacrylic acid (PAA), 3 parts of gelatin, 2 parts of methanol, 4 parts of acetone and 25 parts of water and stir until dissolved, as material A;

[0047] Mix 6 parts of vinyltrichlorosilane, 15 parts of nano-silica sol and 25 parts of water evenly, stir for 20-30 hours, and use it as material B;

[0048] Stir material A and material B evenly, then add 2 parts of titanyl sulfate, 1 part of zirconium oxychloride octahydrate and 5 parts of water, and adjust the pH value to 7 with 2 parts of pH regulator to obtain a chromium-free coating agent.

Embodiment 3

[0050] Mix 4 parts of acrylic acid / maleic acid copolymer (AA-MA), 4 parts of hydroxycellulose, 1 part of ethylene glycol monoethyl ether, 3 parts of methyl acetate and 30 parts of water and stir until dissolved, as material A ;

[0051] Mix 6 parts of γ-chloropropyl-trimethoxysilane, 8 parts of nano-titanium dioxide sol, 4 parts of nano-alumina sol and 20 parts of water, stir for 20-30 hours, and use it as material B;

[0052] Stir material A and material B evenly, then add 1 part of sodium molybdate, 1 part of sodium metasilicate pentahydrate and 10 parts of water, and adjust the pH value to 6 with 1 part of pH regulator to obtain a chromium-free coating agent.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

PropertyMeasurementUnit
particle diameteraaaaaaaaaa
Login to view more

Abstract

The invention belongs to the technical field of chemicals, and relates to a metal surface treatment technology, in particular to a corrosion-resistant neutral chrome-free coating agent and a preparation method thereof. The corrosion-resistant neutral chrome-free coating agent comprises the following components of, by weight, 2-10 parts of water soluble resin, 2-10 parts of micromolecule solvents,10-30 parts of nano oxide sol, 0-5 parts of film-forming auxiliary agents, 1-10 silane coupling agents, 0-5 parts of pH conditioning agents and 50-70 parts of water. The corrosion-resistant neutral chrome-free coating agent is convenient to apply, and is directly in contact with aluminum, magnesium and an aluminum-magnesium alloy plate at ordinary temperature, so that the magnesium-aluminum alloyplate which is high in corrosion resistance, acid resistance and alkali resistance and reaches the hardness requirement can be produced. Aluminum and magnesium alloys using the corrosion-resistant neutral chrome-free coating agent have no color change in the surfaces, and a self-colored passive film can be obtained; and a film layer is thin, and the corrosion-resistant neutral chrome-free coatingagent has little impedance to a metal base and has no corrosion and the subsequent serviceability of the metal base is not affected.

Description

technical field [0001] The invention relates to metal surface treatment technology. Specifically, the invention relates to a corrosion-resistant neutral chromium-free coating agent and a preparation method thereof, belonging to the technical field of chemicals. Background technique [0002] Aluminum alloy refers to the general term for alloys based on aluminum. The main alloying elements are copper, silicon, magnesium, zinc, and manganese, and the secondary alloying elements are nickel, iron, titanium, chromium, lithium, etc. Aluminum alloy is the most widely used non-ferrous metal structural material in industry, and has been widely used in aviation, aerospace, automobile, machinery manufacturing, shipbuilding and other aluminum alloys. [0003] However, aluminum alloys are prone to pitting corrosion, crevice corrosion, stress corrosion and corrosion fatigue when used in humid, industrial gas, fuel gas, salt and dust atmospheres, which limit their application range and shor...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Applications(China)
IPC IPC(8): C23C22/68
CPCC23C22/68C23C2222/20
Inventor 王涛
Owner 广东锴力环保新材料有限公司
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap