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Energy-saving and environment-friendly corrosion-preventing method of metal workpieces

A metal workpiece, energy-saving and environmental protection technology, applied in anti-corrosion coatings, chemical industry, surface pretreatment, etc., can solve the problems of long processing time, large workload, high cost, reduce emission costs, improve coating quality, connect compact effect

Active Publication Date: 2013-12-11
广东恒立信息科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] (2) Phosphating treatment requires neutralization, surface adjustment and other steps, which takes a long time, high cost and heavy workload
Therefore, the above-mentioned anti-corrosion method is not suitable for the energy-saving and environmental protection policy of reducing pollution and improving the environment vigorously advocated by the country today.

Method used

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  • Energy-saving and environment-friendly corrosion-preventing method of metal workpieces
  • Energy-saving and environment-friendly corrosion-preventing method of metal workpieces
  • Energy-saving and environment-friendly corrosion-preventing method of metal workpieces

Examples

Experimental program
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Effect test

Embodiment 1

[0064] An energy-saving and environment-friendly metal workpiece anti-corrosion method comprises the following steps:

[0065] (1) Carry out degreasing and derusting treatment on the surface of the metal workpiece by degreasing and derusting agent:

[0066] With a gantry crane, immerse the metal workpiece (such as the metal casing of the filter) in a square degreasing and derusting tank filled with degreasing and derusting agent. Preferably, the inner layer of the degreasing and derusting tank is acid-resistant polytetrafluoroethylene board, and the outer layer is an insulating material layer. The degreasing and derusting treatment of metal workpieces is completed at 25°C through chemical reaction with degreasing and derusting agents. , the treatment time is 3 minutes, through observation, when the metal workpiece shows its metal color, the degreasing and derusting treatment is completed;

[0067] During the treatment process, on the one hand, a down-suction circulating filte...

Embodiment 2

[0099] An energy-saving and environment-friendly metal workpiece anti-corrosion method comprises the following steps:

[0100] (1) Carry out degreasing and derusting treatment on the surface of the metal workpiece by degreasing and derusting agent:

[0101] With a gantry crane, immerse the metal workpiece (such as the metal casing of the filter) in a square degreasing and derusting tank filled with degreasing and derusting agent. Preferably, the inner layer of the degreasing and derusting tank is acid-resistant polytetrafluoroethylene board, and the outer layer is an insulating material layer. The degreasing and derusting treatment of metal workpieces is completed at 20°C through chemical reactions using degreasing and derusting agents. , the treatment time is 10 minutes. Through observation, when the metal workpiece shows its metal color, the degreasing and rust removal treatment is completed;

[0102] During the treatment process, on the one hand, a down-suction circulating...

Embodiment 3

[0127] An energy-saving and environment-friendly metal workpiece anti-corrosion method comprises the following steps:

[0128] (1) Carry out degreasing and derusting treatment on the surface of the metal workpiece by degreasing and derusting agent:

[0129] With a gantry crane, immerse the metal workpiece (such as the metal casing of the filter) in a square degreasing and derusting tank filled with degreasing and derusting agent. Preferably, the inner layer of the degreasing and derusting tank is acid-resistant polytetrafluoroethylene board, and the outer layer is an insulating material layer. The degreasing and derusting treatment of metal workpieces is completed at 23°C through chemical reactions using degreasing and derusting agents. , the treatment time is 7 minutes. Through observation, when the metal workpiece shows its metal color, the degreasing and derusting treatment is completed;

[0130] During the treatment process, on the one hand, a down-suction circulating fil...

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Abstract

The invention relates to an energy-saving and environment-friendly corrosion-preventing method of metal workpieces. The energy-saving and environment-friendly corrosion-preventing method comprises the steps that (1) oil removal and rust removal are conducted on the surfaces of the metal workpieces through an oil removal and rust removal agent; (2) the metal workpieces are cleaned; (3) the metal workpieces are rinsed; (4) according to corrosion-preventing treatment of the metal workpieces, the metal workpieces are soaked in a corrosion-preventing trough containing corrosion-preventing liquid, the corrosion-preventing liquid needs to reach a set liquid level in the corrosion-preventing trough, the height of the position of the set liquid level is three fourths that of the inner cavity of the corrosion-preventing trough, corrosion-preventing treatment of the metal workpieces is completed at the temperature in the range from 20 DEG C to 25 DEG C, treatment time ranges from 30 seconds to 60 seconds, a downdraft type circulating filtration pump is adopted in a treatment process so that the corrosion-preventing liquid can be stirred and filtered in a circulating mode, and the flow of the circulating filtration pump is 0.1-0.2m<3> / minute as for each cubic meter of the volume of the corrosion-preventing trough. The energy-saving and environment-friendly corrosion-preventing method has the advantages of saving energy and protecting the environment.

Description

technical field [0001] The invention relates to a method for anticorrosion of the surface of metal workpieces, in particular to an energy-saving and environment-friendly anticorrosion method for metal workpieces. Background technique [0002] At present, there are generally three methods of anticorrosion for metals (especially metals used in the automotive industry): [0003] 1. Galvanized or lead-plated method; [0004] 2. Pickling, phosphating, passivation, Dacromet and other methods; [0005] 3. Pickling, phosphating, passivation, electrophoresis or powder spraying methods. [0006] Among them, phosphating treatment is widely used, but it has the following defects: [0007] (1) The harm of phosphorus. [0008] Phosphorus-containing phosphating wastewater has high inorganic phosphorus content, relatively low chemical oxygen demand and biochemical oxygen demand (inorganic phosphorus includes nitrite, phosphate, etc.), and it is difficult to meet the wastewater discharge...

Claims

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Application Information

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IPC IPC(8): B05D7/14B05D7/24B05D3/00B05D3/02B05D3/10C09D163/10C09D7/12C09D5/10
CPCY02P20/10
Inventor 吴昊邹宜哲葛金龙
Owner 广东恒立信息科技有限公司
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