Steel-based hydrogen permeation-resistant composite coating and preparation method for same

A composite coating and hydrogen-repelling technology, which is applied in coatings, metal material coating processes, superimposed layer plating, etc., can solve the problems of poor hydrogen resistance and penetration performance, and achieve improved bonding strength, high reduction factor, and thermal Good cycle performance

Inactive Publication Date: 2013-06-19
GENERAL RESEARCH INSTITUTE FOR NONFERROUS METALS BEIJNG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, thermally grown oxide coatings on stainless steel substrates have certain limitations due to their poor hydrogen permeation resistance, an

Method used

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  • Steel-based hydrogen permeation-resistant composite coating and preparation method for same
  • Steel-based hydrogen permeation-resistant composite coating and preparation method for same
  • Steel-based hydrogen permeation-resistant composite coating and preparation method for same

Examples

Experimental program
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Effect test

Embodiment 1

[0025] Eurofer low-activity martensitic stainless steel sheets were polished and ultrasonically cleaned and then placed in a quartz tubular atmosphere furnace in a water-carrying argon atmosphere at 10 -20 Pa oxygen partial pressure, oxidation at 700°C for 5h to obtain an oxide coating containing chromium oxide. It is then placed in a quartz tube atmosphere furnace to deposit an alumina coating on top of the thermally grown oxide coating using metal-organic chemical vapor deposition. figure 2 SEM photographs of the cross-section and surface of the hydrogen permeation barrier composite coating. in, figure 2 (a) is the cross-sectional electron micrograph of the hydrogen permeable composite coating, such as figure 2 As shown in (a), in the cross-sectional morphology of the hydrogen permeable composite coating, from bottom to top, there are stainless steel substrate, thermally grown oxide coating and alumina coating. figure 2 (b) is the scanning electron micrograph of the s...

Embodiment 2

[0027] F82H low-activity martensitic stainless steel was polished and ultrasonically cleaned and then placed in a quartz tube atmosphere furnace. -20 Pa oxygen partial pressure, oxidized at 900°C for 5h to obtain an oxide coating containing chromium oxide. An alumina coating was then prepared on the thermally grown oxide coating using a sol-gel method. image 3 It is the EDS energy spectrum element depth distribution of the composite coating, and the results show that the composite coating from the outside to the inside is alumina and thermal growth oxide coating respectively. image 3 (b) is the hydrogen permeation resistance curve of the composite coating on F82H stainless steel, and its hydrogen permeation reduction factor is 910 at 400 °C.

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Abstract

The invention provides a steel-based hydrogen permeation-resistant composite coating and a preparation method for the same. The hydrogen permeation-resistant composite coating is composed of a thermally-grown oxide coating on a steel surface, and a compact aluminium oxide coating on the thermally-grown oxide coating, wherein the thermally-grown oxide coating is obtained by performing controlled oxidation treatment on a steel matrix at 700-1000 DEG C; the aluminium oxide hydrogen permeation-resistant coating is provided on the thermally-grown oxide coating which is provided by the steel matrix; and the high-temperature binding force and the thermal cycle performance of the aluminium oxide coating are improved by a thermally-grown oxide middle transition layer. The aluminium oxide coating prepared by the preparation method provided by the invention is compact in structure, strong in binding force, and excellent in hydrogen permeation resistance and thermal cycle use performance.

Description

technical field [0001] The method discloses a steel base hydrogen permeation resistance composite coating and a preparation method thereof. The coating can be used as a permeation barrier coating for steel, especially as a hydrogen permeation barrier coating for hydrogen storage and transport devices, and as a tritium permeation barrier for the first wall structural material of a next-generation nuclear fusion reactor. coating. Background technique [0002] Hydrogen permeation and diffusion problems widely exist in hydrogen-related application fields, and hydrogen permeation will lead to a series of problems such as hydrogen embrittlement, hydrogen precipitation and enrichment, etc. In nuclear fusion reactors, stainless steel as the first wall structural material is at a relatively high working temperature, and its tritium permeability will increase significantly at high temperatures. The penetration of tritium will not only cause waste of tritium, hydrogen embrittlement of...

Claims

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Application Information

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IPC IPC(8): C23C28/04
Inventor 李帅刘晓鹏何迪于庆河王树茂蒋利军
Owner GENERAL RESEARCH INSTITUTE FOR NONFERROUS METALS BEIJNG
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