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Corrosion-resistant and wear-resistant lanthanum hexaboride composite carbon film and deposition method thereof

A technology of lanthanum hexaboride and composite carbon, which is applied in ion implantation plating, metal material coating process, coating and other directions, can solve problems such as safety hazards, prolong service life, improve impact resistance, and improve strength and toughness Effect

Active Publication Date: 2021-01-22
LANZHOU INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Therefore, there is an urgent need to develop new surface treatment technologies to overcome the potential safety hazards caused by chemical reactions in acid-base corrosive media.

Method used

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  • Corrosion-resistant and wear-resistant lanthanum hexaboride composite carbon film and deposition method thereof
  • Corrosion-resistant and wear-resistant lanthanum hexaboride composite carbon film and deposition method thereof

Examples

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Effect test

Embodiment 1

[0035] (1) Choose 316L stainless steel ball valve, and clean the plated valve body with hydrocarbon to remove oil stains, rust spots, etc.;

[0036] (2) Load the valve body to be plated on the rotating tooling frame in the center of the coating vacuum chamber, and keep it rotatable by 360°;

[0037] (3) Vacuum the coating vacuum chamber to 10 -4 Pa, turn on the rotary tooling and let it rotate at a speed of 2 rpm; turn on the high-voltage pulse power supply, feed in argon and hydrogen (air flow ratio 1:1), adjust the air pressure to 3 Pa, bias to 3000 V, frequency to 500 Hz, Duty cycle 5%, cleaning for 30 minutes;

[0038] (4) Turn off the hydrogen and high-voltage pulse power supply, keep the argon gas at 1Pa, turn on the DC pulse power supply, adjust the bias voltage to 650V, the duty cycle to 50%, and the frequency to 20 KHz; turn on the Cr target, control the current to 15A, the pulse frequency to 20 Hz, and the duty cycle Ratio of 40%, deposition for 30 minutes;

[003...

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Abstract

The invention discloses a corrosion-resistant and wear-resistant lanthanum hexaboride composite carbon film and a deposition method thereof. The corrosion-resistant and wear-resistant lanthanum hexaboride composite carbon film is mainly used for wear resistance and corrosion resistance of valve devices in chlor-alkali chemical industry, petrochemical industry, nuclear industry, wastewater treatment and the like. According to the structure of the lanthanum hexaboride composite carbon film, a Cr bonding layer, a CrN / lanthanum hexaboride multi-layer structure and the lanthanum hexaboride composite carbon film are sequentially arranged on the surface of a workpiece from inside to outside. Due to the multi-layer structure, gradient change and amorphous nanocrystalline dispersion strengthening of the lanthanum hexaboride composite carbon film, a liquid flow channel of the single film is broken, and the possibility that porous coating liquid easily penetrates through pore channels to corrodean interface is prevented; due to the alternate design of lanthanum hexaboride and chromium nitride, the hardness and the bearing performance of the base film are improved; and the lanthanum hexaboride composite carbon film deposited through reactive magnetron sputtering has very strong chemical inertness and low friction performance, and long-life and high-reliability service of a valve sealing surface in a corrosive medium can be guaranteed.

Description

technical field [0001] The invention relates to a corrosion-resistant and wear-resistant lanthanum hexaboride composite carbon film and its deposition method, which is used for wear-resistant and anti-corrosion of valve devices such as chlor-alkali chemical industry, petrochemical industry, nuclear industry and wastewater treatment, and belongs to the technical field of composite materials and vacuum coating film technology field. Background technique [0002] In the pipeline connection operation system, the valve acts as the control core component for opening and closing, regulating flow, shunting control and regulating pressure. In practical application, the valve should be resistant to acid and alkali corrosion, impact wear and abrasion caused by multiple frequent openings, so as to ensure the safe and normal operation of the entire system. In order to ensure the safety and reliability of the valve, the sealing surface of the valve is usually surface treated to prevent s...

Claims

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Application Information

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IPC IPC(8): C23C14/35C23C14/16C23C14/06C23C14/02
CPCC23C14/025C23C14/067C23C14/165C23C14/3485C23C14/35
Inventor 张斌贾倩毛金银高凯雄陈善俊
Owner LANZHOU INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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