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Nanomaterial-modified chromium-free Dacromet treatment liquid, and preparation method and application thereof

A technology of nano-materials and treatment fluids, applied in the direction of pre-treatment surface, anti-corrosion coating, polyether coating, etc. Good focus, effect of reducing weighing and operating errors

Inactive Publication Date: 2019-07-05
广州艾可罗高新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Although chromium-free dacromet coatings have appeared on the market, they are usually made of two-component or multi-component, which need to be compounded and used at the production site, which not only pollutes the production environment, affects the lives and health of workers, but also has weighing and Operation errors lead to inconsistent product quality, which affects the performance of anti-corrosion products

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] 1. Use an electronic balance to weigh 20.8g of flake zinc powder, 5.2g of flake aluminum powder, 10g of coupling agent KH-560, 10g of ethylene glycol, 30g of polyethylene glycol, 15g of polyamideimide, carbon nanometer Tube 0.5g;

[0032] 2. Slowly add the coupling agent KH-560 into the modified polyamide-imide, mix evenly, put it into a blender for blending, and let it stand for 2 hours to obtain Part A;

[0033] 3. Mix ethylene glycol and polyethylene glycol, stir evenly, then add carbon nanotubes, and process through a high-speed disperser at 1000rpm for 1 hour to obtain Part B;

[0034] 4. Add part B and part A to the flake zinc powder and flake aluminum powder respectively, and turn on the high-speed disperser at 1500 rpm to treat for 1 hour to prepare No. chrome-free dacromet treatment solution.

[0035] 5. Soak the pre-treated screws in No. chrome-free Dacromet treatment solution, control the coating thickness to 12 μm after centrifugal drying, bake in an oven a...

Embodiment 2

[0037] 1. Use an electronic balance to weigh 34g of flake zinc powder, 10g of coupling agent KH-560, 40g of ethylene glycol, 20g of polyamideimide, 1g of carbon nanotubes, and 5g of phosphate corrosion inhibitor;

[0038] 2. Mix the coupling agent KH-560 and the phosphate corrosion inhibitor to prepare a mixed solution, evenly add it dropwise to the polyamide-imide, then disperse at a high speed for 0.5h and then let it stand for 2h to obtain Part A;

[0039] 3. Add carbon nanotubes to ethylene glycol, and process it through a high-speed disperser at 1200 rpm for 1 hour to obtain Part B;

[0040] 4. Add part B and part A to the flake zinc powder, turn on the high-speed disperser at 1200rpm and treat for 1 hour to prepare No. chrome-free dacromet treatment solution.

[0041] 5. Soak the pre-treated screws in No. chrome-free Dacromet treatment solution, centrifuge and dry to control the coating thickness to 10 μm, bake in an oven at 98°C for 10 minutes, and then heat up to 198°C...

Embodiment 3

[0043] 1. Use an electronic balance to weigh 34g of flake zinc powder, 10g of coupling agent KH-560, 40g of ethylene glycol, 20g of polyamideimide, 1g of carbon nanotubes, and 5g of phosphate corrosion inhibitor;

[0044] 2. Mix the coupling agent KH-560 and the phosphate corrosion inhibitor to prepare a mixed solution, evenly add it dropwise to the polyamide-imide, then disperse at a high speed for 0.5h and then let it stand for 2h to obtain Part A;

[0045] 3. Add carbon nanotubes to ethylene glycol, and process it through a high-speed disperser at 1200 rpm for 1 hour to obtain Part B;

[0046] 4. Add part B and part A to the flake zinc powder, turn on the high-speed disperser at 1200rpm and treat for 1 hour to prepare No. chrome-free dacromet treatment solution.

[0047]5. Soak the pre-treated screws in No. chrome-free Dacromet treatment solution, centrifuge and dry to control the coating thickness to 8 μm, bake in an oven at 98°C for 10 minutes, and then heat up to 198°C f...

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Abstract

The invention relates to the field of environmentally-friendly functional Dacromet treatment liquids, and especially relates to a nanomaterial-modified chromium-free Dacromet treatment liquid, and a preparation method and an application thereof. The nanomaterial-modified chromium-free Dacromet treatment liquid comprises, by weight, 23-49 parts of metal powder, 0.5-1.5 parts of a nanometer conductive agent, 20-40 parts of a dispersant, 6-12 parts of a film-forming agent and 15-50 parts of an aqueous binder. The nanomaterial-modified chromium-free Dacromet treatment liquid has the advantages ofuniform composition, no need to be used in the field, no pollution to the production environment, reduction of weighing and operating errors, and stable product quality; the introduction of the aqueous binder makes a coating layer have good wear resistance; and the surface coating layer of an anticorrosion part, obtained after processing using the nanomaterial-modified chromium-free Dacromet treatment liquid, has good adhesion and strong salt spray resistance.

Description

technical field [0001] The invention relates to the field of environment-friendly functional dacromet treatment liquid, in particular to a chrome-free dacromet treatment liquid modified by nanomaterials and its preparation method and application. Background technique [0002] In the 1960s, the American DIAMOND SHAMROCK company invented a water-based anti-corrosion Dacromet treatment solution for the severe corrosion of auto parts caused by snow removers in winter. Its coating is not only free of hydrogen embrittlement, but also its corrosion resistance can be improved by 7 to 10 times compared with the traditional galvanizing process. It is especially suitable for high-strength stress-bearing parts, and the heat-resistant temperature of the coating can reach 300°C; at the same time, the coating has excellent properties such as high adhesion, high weather resistance, and high permeability, and is widely used in automobiles, home appliances, ships and other fields. However, s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D171/02C09D179/08C09D5/10C09D7/61B05D1/18B05D7/24B05D5/00B05D3/00
CPCB05D1/18B05D3/007B05D5/00B05D7/24C08K2003/0812C08K2003/0893C09D5/103C09D5/106C09D7/61C09D171/02C09D179/08C08L79/08C08K7/00C08K3/08C08K3/041C08K13/04
Inventor 刘和平
Owner 广州艾可罗高新材料有限公司
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