A process for preparing Alticrnita high-entropy alloy coating on the surface of X80 pipeline steel substrate

A high-entropy alloy and substrate surface technology, applied in metal material coating process, coating, vacuum evaporation plating and other directions, can solve the problem of single preparation method of anti-corrosion high-entropy alloy, and achieve excellent corrosion resistance, resistance to Excellent pitting corrosion performance and the effect of improving comprehensive performance

Active Publication Date: 2016-08-24
SICHUAN UNIVERSITY OF SCIENCE AND ENGINEERING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In addition, the preparation methods of anti-corrosion high-entropy alloys are still relatively single, mainly focusing on traditional melting preparation methods, while the plasma preparation methods with industrial application prospects, low pollution, and environmental friendliness, such as magnetron sputtering and multi- Arc ion plating, but few researchers try

Method used

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  • A process for preparing Alticrnita high-entropy alloy coating on the surface of X80 pipeline steel substrate
  • A process for preparing Alticrnita high-entropy alloy coating on the surface of X80 pipeline steel substrate
  • A process for preparing Alticrnita high-entropy alloy coating on the surface of X80 pipeline steel substrate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] (1) Substrate pretreatment

[0044] Process the X80 pipeline steel into discs with a diameter and thickness of 1.5cm and 3mm respectively, and use 280#, 400#, 600#, 800#, 1200#, 1500# water sandpaper to polish the X80 substrate in turn from coarse to fine, until After smoothing, use acetone and absolute ethanol to ultrasonically clean for 15 minutes respectively.

[0045] (2) Bias backsplash cleaning

[0046] Deflate the ultra-vacuum multi-functional magnetron co-sputtering equipment until the vacuum degree of the vacuum chamber is atmospheric pressure, open the vacuum chamber, place the above-mentioned processed X80 wafer on the sample stage of the vacuum chamber, first draw a low vacuum with the mechanical pump, and then the molecular pump Pull high vacuum, and then under the condition of -500V voltage, Ar atmosphere, and 1Pa vacuum degree, bias backsplash cleaning for 5min.

[0047] (3) Pre-sputtering

[0048] The targets 1, 2, 3, 4, and 5 of the ultra-vacuum mult...

Embodiment 2

[0056] (1) Substrate pretreatment

[0057] Process the X80 pipeline steel into discs with a diameter and thickness of 1.5cm and 3mm respectively, and use 280#, 400#, 600#, 800#, 1200#, 1500# water sandpaper to polish the X80 substrate in turn from coarse to fine, until After smoothing, use acetone and absolute ethanol to ultrasonically clean for 20 minutes respectively.

[0058] (2) Bias backsplash cleaning

[0059] Deflate the ultra-vacuum multi-functional magnetron co-sputtering equipment until the vacuum degree of the vacuum chamber is atmospheric pressure, open the vacuum chamber, place the above-mentioned processed X80 wafer on the sample stage of the vacuum chamber, first draw a low vacuum with the mechanical pump, and then the molecular pump High vacuum, and then under the condition of -400V voltage, Ar atmosphere, and 2Pa vacuum degree, bias backsplash cleaning for 10min.

[0060] (3) Pre-sputtering

[0061] The targets 1, 2, 3, 4, and 5 of the ultra-vacuum multi-fu...

Embodiment 3

[0069] (1) Substrate pretreatment

[0070]Process the X80 pipeline steel into discs with a diameter and thickness of 1.5cm and 3mm respectively, and use 280#, 400#, 600#, 800#, 1200#, 1500# water sandpaper to polish the X80 substrate in turn from coarse to fine, until After smoothing, use acetone and absolute ethanol to ultrasonically clean for 20 minutes respectively.

[0071] (2) Bias backsplash cleaning

[0072] Deflate the ultra-vacuum multi-functional magnetron co-sputtering equipment until the vacuum degree of the vacuum chamber is atmospheric pressure, open the vacuum chamber, place the above-mentioned processed X80 wafer on the sample stage of the vacuum chamber, first draw a low vacuum with the mechanical pump, and then the molecular pump Pull high vacuum, and then under the condition of -450V voltage, Ar atmosphere, and 1.5Pa vacuum degree, bias backsplash cleaning for 10min.

[0073] (3) Pre-sputtering

[0074] The targets 1, 2, 3, 4, and 5 of the ultra-vacuum mu...

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Abstract

The invention discloses a process for preparing an AlTiCrNiTa high-entropy alloy coating on the surface of an X80 pipeline steel base material. The process comprises the following steps: pretreating a substrate; carrying out biased backwash cleaning; depositing an AlTiCrNiTa high-entropy alloy coating on the surface of the X80 base material by adopting ultravacuum multifunctional magnetron co-sputtering equipment; and testing the corrosion resistance of the coating. The process is simple to operate, the sputtering power of each target material can be accurately regulated and controlled by adopting a multi-target radio magnetron co-sputtering technology, and the content of each element in the coating is between 5at.% and 35at.%; and the coating prepared by the process has a compact and uniform surface, and has excellent uniform corrosion resistance and pitting resistance.

Description

technical field [0001] The invention belongs to the field of surface modification, and in particular relates to a process for preparing an AlTiCrNiTa high-entropy alloy coating on the surface of an X80 pipeline steel substrate. Background technique [0002] X80 high-strength pipeline steel is considered to be the steel of choice for future natural gas transmission pipelines and has broad application prospects. At present, my country has laid a X80 pipeline with a length of 7.9km on the branch line of the West-East Gas Transmission Project. However, the soil corrosion environment has the characteristics of diversity, immobility, inhomogeneity, time seasonality and regionality, which lead to uniform corrosion, pitting corrosion, crevice corrosion, stress corrosion cracking, etc. of X80 steel, which seriously affect the safe operation of pipelines. Big hidden danger. Therefore, it is of great significance to study the surface modification of X80 pipeline steel to improve its ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23C14/35C23C14/16
CPCC23C14/165C23C14/352
Inventor 刘春海王龙龚敏崔学军何林芯张伟陈昶
Owner SICHUAN UNIVERSITY OF SCIENCE AND ENGINEERING
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