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Plasma-assisted oxidation treatment device and application thereof

A technology of oxidation treatment and plasma, which is applied in the direction of metal material coating process, coating, solid diffusion coating, etc., can solve the problems of a large amount of waste liquid that is not environmentally friendly, has high requirements for processing parts, and is easy to introduce impurities, etc., and achieves excellent results. Uniform, cost-effective results

Inactive Publication Date: 2020-03-10
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] One of the technical problems to be solved by the present invention is that in the prior art, the process is complex, the requirements for processing parts are high, a large amount of waste liquid is not environmentally friendly during the processing process, and impurities are easily introduced during the processing process. A new plasma-assisted oxidation process is provided. The processing device has the advantages of simple process, low requirements for processing parts, and good processing effect

Method used

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  • Plasma-assisted oxidation treatment device and application thereof
  • Plasma-assisted oxidation treatment device and application thereof
  • Plasma-assisted oxidation treatment device and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] A plasma-assisted oxidation treatment device, such as figure 1 As shown, it includes gas source, oxidizing gas source, heater, high-temperature oxidizing gas delivery pipe, plasma generator, connecting pipe, plasma nozzle, oxidizing gas nozzle, transmitter, infrared temperature detector, and the gas source is connected to one end of the plasma generator , the plasma generator is connected to the plasma nozzle through a connecting pipe, the oxidizing gas source is connected to one end of the heater, and the heater is connected to the oxidizing gas nozzle through a high-temperature oxidizing gas delivery pipe. A conveyor is provided on which the samples to be processed are located. The flow rate of each plasma nozzle is the same, and the flow rate of each oxidation gas nozzle is the same. There are two plasma shower heads and two oxidation gas shower heads.

[0026] The gas source provides gas to the plasma generator to generate a plasma flow, which passes through the c...

Embodiment 2

[0029] According to the conditions and steps described in Example 1, the device was used to oxidize the surface of 022Cr19Ni10 stainless steel samples, the gas source 1 was air, the plasma nozzle 4 was selected to be 20×1mm, and the size of the oxidation gas nozzle 5 was selected to be 30×4mm. Adjust the distance between the plasma nozzle 4 and the upper and lower surfaces of the sample 9 to be about 8 mm, and the distance between the oxidation gas nozzle 5 and the upper and lower surfaces of the sample 9 to be 15 mm. Control the surface temperature of the sample to 230°C by adjusting the heater 7, and set the transmission speed of the conveyor 10 to 1mm / min.

[0030] After treatment, a golden yellow oxide film was formed on the surface of the sample, such as figure 2 . After oxidation treatment, the thickness of the oxide film increases significantly. The thickness of the oxide film of the untreated sample is 8nm, and the thickness of the film after treatment reaches about ...

Embodiment 3

[0032] According to the conditions and steps described in Example 1, the device is used for the surface oxidation treatment of 022Cr17Ni12Mo2 stainless steel packing sheets, the plasma nozzle 4 is selected to be 40 × 1mm, and the distance between the plasma nozzle 4 and the upper and lower surfaces of the sample 9 is adjusted to be 8mm, and the oxidation gas The nozzle 5 has a size of 50×5 mm, and the distance between the oxidation gas nozzle 5 and the upper and lower surfaces of the sample 9 is 15 mm. Control the surface temperature of the sample to 230°C by adjusting the heater 7, and set the transmission speed of the conveyor 10 to 1mm / min.

[0033] After treatment, golden yellow and light blue oxide films were formed on the surface of the sample, such as Figure 4 .

[0034] The heat transfer oil was selected as the base oil, and the acid value was adjusted to 10mgKOH / g using commercial naphthenic acid fractions. The corrosion test was carried out in a high-temperature an...

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Abstract

The invention relates to a plasma-assisted oxidation treatment device and application thereof. The problems that in the prior art, the process is complex, the requirement on treated parts is high, a large amount of waste liquid generated in the treatment process is not environmentally friendly, and impurities are prone to being introduced in the treatment process are solved. The plasma-assisted oxidation treatment device comprises a gas source, an oxidizing gas source, a heater, a high-temperature oxidizing gas conveying pipe, a plasma generator, a connecting pipe, plasma spray heads, oxidizing gas spray heads, a conveying device and an infrared thermometer, wherein the gas source is connected with one end of the plasma generator, the plasma generator is connected with the plasma spray heads through the connecting pipe, the oxidizing gas source is connected with one end of the heater, and the heater is connected with the oxidizing gas spray heads through the high-temperature oxidizinggas conveying pipe; and the plasma spray heads and the oxidizing gas spray heads are arranged in an oppositely spraying manner, the conveying device is arranged in the outlet direction of the spray heads, and a sample to be treated is located on the conveying device. According to the plasma-assisted oxidation treatment device, the above-mentioned problems are solved, and the plasma-assisted oxidation treatment device can be used for surface oxidation treatment of stainless steel devices in all industries.

Description

technical field [0001] The invention relates to a plasma assisted oxidation treatment device and its application. Background technique [0002] The corrosion resistance of stainless steel depends on the formation of a dense oxide film on the surface. In order to exert the corrosion resistance of stainless steel, passivation treatment is usually required. Traditional passivation treatment methods, such as: dipping, brushing, paste, spraying, electrochemical, etc., The process is cumbersome and the cost is high, and both pickling and passivation produce a large amount of waste liquid, which is not environmentally friendly. Moreover, it is difficult to process samples with large volume and complex shape, and impurities such as HF and dichromate may be introduced during the process. The invention provides a plasma-assisted oxidation treatment device, which is simple and convenient in treatment, low in cost, friendly to the environment and excellent in effect. [0003] CN201410...

Claims

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Application Information

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IPC IPC(8): C23C8/38
CPCC23C8/38
Inventor 单广斌黄贤滨李贵军屈定荣
Owner CHINA PETROLEUM & CHEM CORP