Coating process applying water-based paint to cast iron parts

A water-based coating and coating process technology, which is applied to the surface coating liquid device, anti-corrosion coating, epoxy resin coating, etc., can solve the problem that the corrosion resistance is not easy to meet the requirements of cast iron anti-corrosion, low production efficiency, and insufficient technology Mature and other issues, to achieve good hiding power, improve production efficiency, and good appearance

Inactive Publication Date: 2013-03-20
GUANGZHOU QINGTIAN INDAL +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the relatively immature technology of water-based coatings at present, if there is no correct construction process, its corrosion resistance is not easy to meet the requirements of cast iron anti-corrosion
Moreover, the metal surface treatment process used in traditional solvent-based coatings needs to be derusted by manual grinding and other means after shot blasting treatment, which is time-consuming and labor-intensive, and the production efficiency is very low.

Method used

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  • Coating process applying water-based paint to cast iron parts

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Cast iron parts are shot blasted to remove oil and rust from the surface of the part. Then, post-treatment is carried out by brushing the water-based rust-bearing paint to remove floating rust on the surface of the base material of the component. Then spray water-based epoxy zinc-rich primer (the main component and ratio are water-based epoxy resin: zinc powder = 20:80, and the ratio of water-based polyamine to curing agent is 5:1), and the wet film thickness is about 60~ 120 microns, dry at room temperature for more than 0.5 hours. After the surface of the paint film is dry, spray the water-based polyurethane texture topcoat (its main component and ratio are water-based polyurethane resin: weather-resistant coloring pigment: auxiliary agent: water = 40:30:5:15, and the combination of polyurethane curing agent Ratio is 6:1), after leveling for 15-30 minutes, spray the topcoat again, the wet film thickness is controlled at 100-200 microns, and then dry at room temperatu...

Embodiment 2

[0034] Grit blasting cast iron parts to remove oil and rust from the surface of the part. Then, post-treatment is performed with an aqueous rust-carrying paint to remove floating rust on the surface of the base material of the component. Then spray water-based epoxy ester anti-corrosion primer (the main components and ratio are water-based epoxy ester resin: anti-rust pigments and fillers: additives: water = 40:25:5:30, the wet film thickness is about 60-100 Micron, dry at room temperature for more than 0.5 hours. After the paint film is surface-dry, spray water-based polyurethane texture topcoat (its main component and proportion are water-based polyurethane resin: weather-resistant coloring pigment: additive: water = 50:30:3: 15. The ratio with the polyurethane curing agent is 6:1, the wet film thickness is controlled at 60-140 microns, and then dried at room temperature. The total dry film thickness of the composite coating is about 80-200 microns. Check the appearance and ...

Embodiment 3

[0036] Grinding and descaling of cast iron components to remove oil and rust from the surface of the component. Then, post-treatment is carried out by brushing the water-based rust-bearing paint to remove floating rust on the surface of the base material of the component. Then spray water-based epoxy anti-corrosion primer (the weight ratio of its main components is water-based epoxy resin: anti-rust pigment: auxiliary agent: water=50:30: 5: 15 and water-based polyamine curing agent, the proportion is 8:1, the wet film thickness is about 60-100 microns, bake at 80°C for 30 minutes, inspect the appearance and performance of the coating film, and finally spray the water-based polyurethane texture topcoat (the main component and ratio are water-based polyurethane resin: weather-resistant type Coloring pigments: additives: water = 50:25:4:20, the ratio of polyurethane curing agent is 6:1, the wet film thickness is controlled at 60-140 microns, then leveled for 8 minutes, and then b...

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Abstract

The invention discloses a coating process applying water-based paint to cast iron parts. The coating process is characterized in that water-based anti-corrosion priming paint and waterborne polyurethane texture finish paint are combined and used on base materials of the cast iron parts of machinery. The coating process applying the water-based paint to the cast iron parts enables the water-based paint to be correctly used the coating of the cast iron parts of the machinery, and not only solves harm and potential safety hazards brought about by a traditional coating process to a forklift, but also improves the protecting performance and the physical and chemical performance of the coating process, and prolongs service life of the forklift.

Description

technical field [0001] The invention relates to a painting process for applying water-based paint to cast iron parts. Background technique [0002] The machinery industry uses a lot of cast iron materials, and the use environment of machinery is generally relatively harsh, coupled with its high value and long service life, so it has high requirements for corrosion resistance and weather resistance. By spraying its metal surface, its anti-corrosion performance can be enhanced, thereby increasing its service life. The traditional coating method uses solvent-based coatings, which can basically meet the performance requirements of cast iron such as corrosion resistance and weather resistance, and its construction technology is relatively mature. However, because solvent-based coatings contain a large amount of toxic and harmful solvents, are flammable and explosive, and do not meet the development requirements of national environmental protection coatings, they are currently de...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B05D7/14B05D3/12B05D3/02C09D5/08C09D163/00C09D7/12C09D1/00C09D175/04
Inventor 王从国许振阳胡乐晖张红禹汉文许奕祥
Owner GUANGZHOU QINGTIAN INDAL
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