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Product comprising protective coating and method of making product

A protective coating and product technology, applied in the coating, metal material coating process, ion implantation plating, etc., can solve the problem of providing sufficient protection for zirconium alloy cladding materials, fast corrosion kinetics, and corrosion protection life Short and other problems, to achieve the effect of improving the fault tolerance of accidents and excellent resistance to water vapor corrosion

Pending Publication Date: 2021-05-14
NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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  • Abstract
  • Description
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Problems solved by technology

[0003] However, the chromium layer prepared in the traditional technology mostly grows along the crystal plane (110) or (200). The corrosion kinetic rate of this kind of chromium layer under water vapor is relatively fast, and the oxidation corrosion is serious, especially when the chromium layer is thin. It cannot provide sufficient protection for the zirconium alloy cladding material, and the anti-corrosion protection life is short. Therefore, it is often necessary to cooperate with the chromium alloy layer to provide sufficient protection for the zirconium alloy cladding material, which greatly limits its use in reactor accident conditions. application under

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  • Product comprising protective coating and method of making product
  • Product comprising protective coating and method of making product
  • Product comprising protective coating and method of making product

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[0032] The present invention also provides a preparation method of the above-mentioned product comprising a protective coating, the preparation method comprising the following steps:

[0033] S1, providing the matrix;

[0034] S2, using chromium as a target, depositing a chromium layer on the surface of the substrate by DC magnetron sputtering to obtain a product including a protective coating, wherein the cavity pressure of the DC magnetron sputtering method is 0.2Pa -0.3Pa, preferably 0.25Pa-0.3Pa; the power density of the target is 5w / cm 2 -7.2w / cm 2 , preferably 6.0w / cm 2 -7.0w / cm 2 ; The time is 5h-12h, preferably 8h-12h.

[0035] In step S1, the substrate may be a zirconium alloy substrate.

[0036] In one embodiment, the substrate may be pretreated, and the pretreatment process includes: ultrasonically cleaning the substrate with an organic solvent. Preferably, the steps include using different organic solvents to sequentially perform ultrasonic cleaning on the su...

Embodiment 1

[0045] (1) The zirconium alloy substrate is ultrasonically cleaned with acetone and ethanol respectively, and then the zirconium alloy substrate is fixed on the sample holder in the vacuum coating chamber.

[0046] (2) Heat the chamber to 200°C, and vacuum the chamber to 3.0×10 -3 Pa. Then the sample holder is rotated to the front of the chromium target to maintain rotation, and argon gas with a flow rate of 40 sccm is introduced into the vacuum cavity. The current of the linear anode ion source was set to 0.2A, the negative bias voltage of the substrate was set to -150V, and the substrate was etched for 20 minutes with ionized argon ions.

[0047] (3) Admit argon gas into the cavity, and maintain the pressure at 0.3Pa. Keep the distance between the zirconium alloy substrate and the target surface at 12cm, and set the power density of the chromium target to 6.6w / cm 2 , the bias voltage of the zirconium alloy substrate was set to -125V, and a chromium layer was deposited on ...

Embodiment 2

[0049] (1) The zirconium alloy substrate is ultrasonically cleaned with acetone and ethanol respectively, and then the zirconium alloy substrate is fixed on the sample holder in the vacuum coating chamber.

[0050] (2) Heat the chamber to 200°C, and vacuum the chamber to 3.0×10 -3 Pa. Then the sample holder is rotated to the front of the chromium target to maintain rotation, and argon gas with a flow rate of 40 sccm is introduced into the vacuum cavity. The current of the linear anode ion source was set to 0.2A, the negative bias voltage of the substrate was set to -150V, and the substrate was etched for 20 minutes with ionized argon ions.

[0051] (3) Admit argon gas into the cavity, and maintain the pressure at 0.25Pa. Keep the distance between the zirconium alloy substrate and the target surface at 12cm, and set the power density of the chromium target to 7.2w / cm 2 , the bias voltage of the zirconium alloy substrate was set to -125V, and the chromium layer was deposited ...

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Abstract

The invention relates to a product comprising a protective coating. The product comprises a base body and the protective coating arranged on the surface of the base body, wherein the protective coating comprises a chromium layer; the chromium layer has a crystal face diffraction peak (211) at the position of 2theta = 81-82 degrees; and the thickness of the coating is 5-20 [mu]m. The invention also relates to a method of making the product comprising the protective coating. Compared with chromium layers growing in the crystal face direction (110) and the crystal face direction (200), the chromium layer growing in the crystal face direction (211) can remarkably reduce the corrosion reaction rate with water vapor. Therefore, the product with the protective coating has excellent water vapor corrosion resistance, and the accident fault-tolerant capability of the base body can be effectively improved.

Description

technical field [0001] The invention relates to the technical field of surface treatment, in particular to a product including a protective coating and a preparation method thereof. Background technique [0002] Zirconium alloy is currently the most mainstream cladding material for light water reactors. However, zirconium alloys are prone to react with high-temperature water vapor when the coolant fails, producing a large amount of hydrogen gas, which can cause an explosion. The metal chromium (Cr) layer has excellent thermal conductivity, machinability, high temperature water vapor oxidation resistance and chemical compatibility with zirconium alloys. Therefore, the traditional technology usually uses a high temperature oxidation resistant chromium layer to block high temperature water vapor Exothermic reaction with zirconium alloys. [0003] However, the chromium layer prepared in the traditional technology mostly grows along the crystal plane (110) or (200). The corrosi...

Claims

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Application Information

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IPC IPC(8): C23C14/35C23C14/16C23C14/02C23C14/50C23C14/54
CPCC23C14/35C23C14/165C23C14/022C23C14/54C23C14/505
Inventor 汪爱英王振玉刘应瑞柯培玲左潇
Owner NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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