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Anti-corrosion and anti-hydrogen permeation coating and preparation method thereof

A coating and anti-hydrogen technology, applied in coating, metal material coating process, vacuum evaporation plating, etc., can solve the problems of poor corrosion resistance and inability to meet the anti-corrosion and anti-hydrogen permeation performance requirements of supercritical water reactor materials , to achieve the effect of strong corrosion resistance, good high temperature stability and oxidation resistance, high melting point

Pending Publication Date: 2022-07-01
GRIMAT ENG INST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the commonly used substrate materials are low-reactivity martensitic or austenitic stainless steels, on which coatings are prepared. However, although the commonly used oxide and nitride coatings have a certain hydrogen permeation resistance effect, they have poor corrosion resistance and cannot meet the ultra- Anti-corrosion and anti-hydrogen permeation performance requirements of critical water reactor materials

Method used

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  • Anti-corrosion and anti-hydrogen permeation coating and preparation method thereof
  • Anti-corrosion and anti-hydrogen permeation coating and preparation method thereof
  • Anti-corrosion and anti-hydrogen permeation coating and preparation method thereof

Examples

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Effect test

Embodiment 1

[0030] 1. Preparation of 316L / AlCrCoFeTi / AlCrCoFeTiO anti-corrosion and anti-hydrogen permeation coating

[0031] 1) Select 316L stainless steel as the substrate, polish one side of the 316L stainless steel substrate to a roughness of 2 μm, and use a high-entropy alloy AlCrCoFeTi target with a diameter of 100 mm for sputtering.

[0032] 2) Use mechanical pump and molecular pump to vacuumize the magnetron sputtering chamber in turn until the vacuum degree reaches 2.0×10 -3 Pa.

[0033] 3) Pour in the working gas Ar gas, control the air flow rate to 20sccm, adjust the sputtering pressure to 0.5Pa, the sputtering current to 0.5A, the target-base distance during sputtering to be 100mm, and to obtain AlCrCoFeTi with a thickness of 100nm after 30min sputtering High-entropy alloy transition layer.

[0034] 4) Control the Ar gas flow to be 20sccm, feed oxygen, the flow rate is 10sccm, adjust the sputtering pressure to be 0.5Pa, the sputtering current to be 0.5A, the target-base dist...

Embodiment 2

[0045] 1. Preparation of 316L / AlCrNbTiZr / AlCrNbTiZrNO / AlCrNbTiZr / AlCrNbTiZrNO anti-corrosion and anti-hydrogen penetration coating

[0046] 1) Select 316L stainless steel as the substrate, polish one side of the 316L stainless steel substrate to a roughness of 2 μm, and use a high-entropy alloy AlCrNbTiZr target with a diameter of 100 mm for sputtering.

[0047] 2) Use mechanical pump and molecular pump to vacuumize the magnetron sputtering chamber in turn until the vacuum degree reaches 2.0×10 -3 Pa.

[0048] 3) Pour in the working gas Ar gas, control the air flow rate to be 25sccm, adjust the sputtering gas pressure to 0.5Pa, the sputtering current to be 0.5A, the target base distance during sputtering to be 120mm, and to obtain AlCrNbTiZr with a thickness of 100nm after 20min sputtering High-entropy alloy transition layer.

[0049] 4) Control the flow of Ar gas to 25sccm, and feed O 2 and N 2 , the flow rate is 10sccm, the sputtering pressure is adjusted to 0.5Pa, the s...

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Abstract

The coating comprises a stainless steel base body, a high-entropy alloy transition layer and a high-entropy alloy ceramic layer which are sequentially arranged, the high-entropy alloy transition layer and the high-entropy alloy ceramic layer are sequentially and alternately overlaid for 1-10 times, the high-entropy alloy transition layer is made of AlCrCoFeTi or AlCrNbTiZr high-entropy alloy, and the high-entropy alloy ceramic layer is made of AlCrCoFeTi or AlCrNbTiZr high-entropy alloy. And the high-entropy alloy ceramic layer is a nitride, an oxide or a nitrogen oxide of an AlCrCoFeTi or AlCrNbTiZr alloy. The coating structure formed by alternately overlapping the high-entropy alloy transition layers and the high-entropy alloy ceramic layers is adopted, and the binding force and thermal shock resistance of the coating and the stainless steel substrate are improved. A medium-frequency magnetron sputtering method is selected for the high-entropy alloy transition layer; and the high-entropy alloy ceramic layer adopts an intermediate-frequency reactive sputtering method. The corrosion-resistant and hydrogen-permeation-resistant coating has excellent corrosion resistance and hydrogen permeation resistance, and is especially suitable for the field of supercritical water gasification hydrogen production.

Description

technical field [0001] The invention relates to a coating material for a supercritical water reactor, in particular to an anti-corrosion and hydrogen permeation-proof coating and a preparation method thereof, belonging to the technical field of coating materials for supercritical water reactors. Background technique [0002] Supercritical water (SCW) refers to water with special properties whose temperature and pressure are higher than its critical point (temperature 374.15°C, pressure 22.12MPa). Hydrogen production by supercritical water gasification (SCWG) is to use the powerful dissolving ability of supercritical water to dissolve various organic substances in biomass (such as straw, coal, etc.) Rapid gasification under high pressure reaction conditions produces a hydrogen-rich gas mixture. The catalytic gasification of biomass is carried out in supercritical water, and the gasification rate of biomass can reach 100%. 2 The volume percentage of the ions can even exceed ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C14/16C23C14/06C23C14/08C23C14/35
CPCC23C14/165C23C14/0641C23C14/0676C23C14/08C23C14/35C23C14/0036
Inventor 李世杰于庆河刘皓李衫衫米菁郝雷
Owner GRIMAT ENG INST CO LTD
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