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Surface treatment method and device treated by surface treatment method

一种表面处理、表面层的技术，应用在处理烃油、处理设备腐蚀/抑制污垢、机械设备等方向，能够解决应力断裂、热疲劳、物理特性不利影响等问题

Inactive Publication Date: 2015-06-17
GENERAL ELECTRIC CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, due to carburization, carbon deposits also impair mechanical properties, e.g. cause stress cracking, thermal fatigue, softening, thereby adversely affecting the physical properties of device components such as radiant tubes
[0003] Other devices and processes that generate carbon material by-products, such as steam reforming of methane and combustion of carbon fuels, also suffer from the problem of carbon material by-product buildup

Method used

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  • Surface treatment method and device treated by surface treatment method
  • Surface treatment method and device treated by surface treatment method
  • Surface treatment method and device treated by surface treatment method

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0048] Example 1BaCe 0.7 Zr 0.3 o 3 powder preparation

[0049] BaCe 0.7 Zr 0.3 o3 Powders are prepared by solid state reaction methods. Stoichiometric high-purity barium carbonate, zirconia, and ceria powders (all from Sinopharm Chemicals Co., Ltd., Shanghai, China) were mixed in ethanol and ball milled for 16 hours. Calcined in air at 1600°C for 2 hours to form BaCe 0.7 Zr 0.3 o 3 powder. The calcined powder was mixed with ethanol and ball milled for 16 hours. BaCe obtained after drying 0.7 Zr 0.3 o 3 Powder (d 50 = 1.5 microns).

example 2

[0050] Example 2 Processing Material Preparation

[0051] BaCe prepared in Example 1 0.7 Zr 0.3 o 3 powder (7.87 g) and 11.93 g CeO 2 The sol (20 wt%, dispersed in water, Alfa Aesar #12730, obtained from Alfa Aesar, Ward Hill, MA, USA) was added to a plastic bottle mounted on a high speed mixing machine. After mixing for 30 minutes, dry with an infrared lamp. The dried powder is pressed into processing tablets.

[0052] Put the treated piece into a tube furnace for vacuum sintering at about 1000°C and then cool to room temperature. The rate of temperature rise and fall in the furnace was about 5°C / minute.

example 3

[0053] Example 3 surface treatment

[0054] The treated sheet obtained in Example 2 was ground with sandpaper and then the powder on its surface was removed with compressed air.

[0055] The substrate material made of Kubota KHR45A alloy was pretreated by sandblasting machine and sandpaper polishing. Then ultrasonically wash in deionized water for 10 minutes, dry with paper, and blow off residual moisture with compressed air.

[0056] The treatment sheets are placed on the substrate materials, covering part of the surface of each substrate material. Then put the two together into a tube furnace and treat them at 850°C for 8 hours in an atmosphere of nitrogen and water vapor (the weight ratio of nitrogen to water vapor is 1:1). The energy dispersive spectroscopy (EDS) analysis results shown in Tables 2 and 3 below show that the elements in both the base material and the treatment sheet were formed on the surface of the substrate material contacting the treatment sheet, but on...

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PUM

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Abstract

A surface treatment method includes: contacting a substrate with a treatment material, the substrate comprising a metallic element, the treatment material comprising an alkaline earth metal element, an alkali metal element, or any combination thereof; and forming on the substrate a surface layer comprising a first oxide of the alkaline earth metal element, the alkali metal element, or any combination thereof and a second oxide of the metallic element. A device has: a substrate layer comprising a metallic element; and a surface layer comprising a first oxide of an alkaline earth metal element, an alkali metal element, or any combination thereof, and a second oxide of the metallic element.

Description

technical field [0001] The present invention relates to methods of surface treatment and apparatus therefor particularly suitable for use in environments where carbon material by-products are formed. Background technique [0002] By-products of carbon materials such as carbon deposits (coke) produced in many processes are generally undesirable by-products. For example, in hydrocarbon cracking processes, buildup of carbon material by-products (eg, carbon deposits) occurs on the interior surfaces of plant components, such as the interior surfaces of cracking furnace radiant tubes. The inner surface of the radiant tube is gradually covered with a layer of carbon deposits, which leads to an increase in the temperature of the radiant tube metal and increases the drop in pressure after passing through the radiant tube. In addition, due to carburization, carbon deposits also impair mechanical properties, eg cause stress fracture, thermal fatigue, softening, thereby adversely affec...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C20/00
CPCC10G9/16C10G75/00C10G75/04C23C24/082C10G7/10F16L58/14
Inventor 王世忠彭文庆劳伦斯·B·库郝楠徐悟生郭明虎周宏古彦飞杨朝晖
Owner GENERAL ELECTRIC CO
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