A method for rapidly preparing aluminum oxide on the surface of 316l stainless steel aluminide anti-tritium coating

A stainless steel and aluminide technology, which is applied in the field of rapid preparation of Al2O3 on the surface of 316L stainless steel aluminide tritium-resistant coating, can solve the problems of matrix tissue damage, mechanical properties, reduction, and long processing time, and achieve low processing temperature, high efficiency, and easy operation. simple effect

Active Publication Date: 2022-04-19
UNIV OF SCI & TECH BEIJING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, thermal oxidation treatment forms α-Al 2 o 3 The temperature is as high as 1200°C and the processing time is longer
Prolonged exposure to high temperature oxidation treatment will cause damage to the matrix tissue and greatly reduce the mechanical properties

Method used

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  • A method for rapidly preparing aluminum oxide on the surface of 316l stainless steel aluminide anti-tritium coating
  • A method for rapidly preparing aluminum oxide on the surface of 316l stainless steel aluminide anti-tritium coating
  • A method for rapidly preparing aluminum oxide on the surface of 316l stainless steel aluminide anti-tritium coating

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] In this embodiment, pulse current treatment is performed on strip-shaped aluminum-dipping coated 316L stainless steel. Specific steps are as follows:

[0021] Step 1: Prepare pulsed samples. Take an aluminum-coated 316L stainless steel sample with a sample size of 30mm×10mm×2.2mm (immerse in a 680°C molten immersion aluminum solution for 10 minutes), and use an ultrasonic device to clean the sample in alcohol for 30 minutes to ensure that the sample is clean. Good contact with pulse electrode.

[0022] The second step: determine the pulse processing parameters and perform pulse processing. Set the parameter range of the pulse current, and determine the pulse current parameter as 31000Hz, 3.5μs, 12.7A / mm 2 , the action time is 5min, and the Joule heating temperature rise caused by the electric pulse is about 950°C. Fix the sample at the output end of the pulse power supply with a fixture, and conduct pulse current treatment on it at room temperature.

[0023] Step 3...

Embodiment 2

[0025]In this embodiment, pulse current treatment is performed on tubular aluminum-dipped 316L stainless steel. Specific steps are as follows:

[0026] Step 1: Prepare pulsed samples. Take an aluminum-coated 316L stainless steel sample with an inner diameter of 16.8mm, an outer diameter of 20.6mm, and a length of 40mm (immerse in a 750°C molten immersion aluminum bath for 8 minutes), and use an ultrasonic device to clean the sample in alcohol 30min to ensure that the sample is clean and in good contact with the pulse electrode.

[0027] The second step: determine the pulse processing parameters and perform pulse processing. Set the parameter range of the pulse current, and determine the pulse current parameter as 31000Hz, 3.5μs, 14A / mm 2 , the action time is 5min, and the Joule heating temperature rise caused by the electric pulse is about 1100°C. Fix the sample at the output end of the pulse power supply with a fixture, and conduct pulse current treatment on it at room te...

Embodiment 3

[0030] In this example, pulse current treatment is performed on tubular aluminized 316L stainless steel. Specific steps are as follows:

[0031] Step 1: Prepare pulsed samples. Take an aluminized coated 316L stainless steel sample with an inner diameter of 16.8mm, an outer diameter of 20.6mm, and a length of 40mm. Use an ultrasonic device to clean the sample in alcohol for 30 minutes to ensure that the sample is clean and can be in good contact with the pulse electrode.

[0032] The second step: determine the pulse processing parameters and perform pulse processing. Set the parameter range of the pulse current, and determine the pulse current parameter as 32000Hz, 3.5μs, 10.5A / mm 2 , the action time is 60min, and the Joule heating temperature rise caused by the electric pulse is about 900°C. Fix the sample at the output end of the pulse power supply with a fixture, and conduct pulse current treatment on it at room temperature.

[0033] Step 3: Carry out XRD detection on th...

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Abstract

The invention discloses a method for quickly preparing aluminum oxide on the surface of a 316L stainless steel aluminide tritium-resistance coating, which belongs to the technical field of coatings. The method is to connect the 316L stainless steel with aluminide tritium-resistant coating to the pulse power supply with a wire, and continue to apply the pulse current until the corresponding time, and select the appropriate pulse current processing parameter range according to the type of sample tritium-resistant coating and the size of the pulse-treated sample: frequency 500Hz~33000Hz, pulse width 1μs~100ms, current density 2A / mm 2 ~50A / mm 2 , the action time is 1min to 8h, and the Joule heat temperature rise caused by the electric pulse is 300-1200℃. Compared with the existing method of preparing a tritium-blocking oxide layer using a traditional high-temperature thermal oxidation aluminum oxide tritium-blocking coating, the present invention can realize the formation of an oxide layer on the coating surface at a lower processing temperature, and the processing required The time is short, it can meet the processing of workpieces of various sizes and shapes, the operation process is simple, and the energy consumption is low, which meets the requirements of the current industrial green development plan.

Description

technical field [0001] The invention belongs to the technical field of coatings, in particular to a method for rapidly preparing 316L stainless steel aluminide anti-tritium coating surface Al 2 o 3 Methods. Background technique [0002] In the nuclear reactor environment, hydrogen and its isotopes are the main fuels for fusion reactions, among which tritium has certain radioactivity and activity, and has strong penetration ability to structural materials, so it is easy to leak and cause fuel loss. Moreover, the penetration of tritium will cause problems such as embrittlement of structural materials and radioactive pollution. Preparation of tritium-resistant coatings on the surface of steel structural materials (such as: 316L stainless steel, P91 steel, low-activation ferrite / martensitic steel, etc.) is one of the most effective methods to reduce the penetration of hydrogen and its isotopes. [0003] Al 2 o 3 Because the tritium penetration reduction factor (PRF) is much...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23C8/02C23C2/12C23C8/10C23C2/36C23C2/38
CPCC23C8/02C23C2/12C23C8/10C23C2/36C23C2/385
Inventor 张新房黄孝山
Owner UNIV OF SCI & TECH BEIJING
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