Corrosion-resistant metal porous material and preparation method and application thereof

A metal porous and corrosion-resistant technology, which is applied in the direction of metal material coating process, coating, gaseous chemical plating, etc., can solve the problems of reducing the activation energy of chemical reactions, large specific surface area of ​​metal porous materials, and shortened service life. Achieve excellent filtration performance, reduce coarse grain size, and facilitate operation

Pending Publication Date: 2020-11-10
WESTERN METAL MATERIAL
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] However, the metal porous material has a large specific surface area and strong surface activity, which reduces the activation energy for chemical reactions. 2 SO 4 , HF and other corrosive media are prone to reactions, resulting in a sharp shortening of the service life

Method used

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  • Corrosion-resistant metal porous material and preparation method and application thereof
  • Corrosion-resistant metal porous material and preparation method and application thereof

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preparation example Construction

[0033] The present invention provides the preparation method of the corrosion-resistant metal porous material according to the above technical solution, comprising the following steps:

[0034] The metal porous material substrate is heated, and the precursor gas of Ta and / or Mo is introduced perpendicular to the surface direction of the metal porous material substrate to carry out chemical vapor deposition, and a metal is formed on the surface of the porous skeleton of the metal porous material substrate. A Ta layer, a metal Mo layer or an alternate composite layer of a metal Ta layer and a metal Mo layer to obtain the corrosion-resistant metal porous material;

[0035] The precursor gas is a halide or an organic complex; when the precursor gas is a halide, a reducing gas is also introduced.

[0036] The present invention heats the metallic porous material substrate. Before heating, in the present invention, the porous metal material substrate is preferably pretreated; the pr...

Embodiment 1

[0061] A titanium fiber sintered plate with a porosity of 80% and an average wire diameter of 65 μm was selected as the base material, and thermally activated chemical vapor deposition (CVD) Ta was performed on its surface to prepare a corrosion-resistant full-through-hole metal fiber sintered body, which can be used as fuel For battery bipolar plates, the process is as follows:

[0062] After the titanium fiber sintered plate was sequentially washed with alkali, acid, deionized water and dried, it was placed in a chemical vapor deposition reaction chamber; the TaF 5 The solid material is heated to above the boiling point (229.2°C) by a constant temperature heater under normal pressure to make TaF 5 gas, with H 2 Mixed into the deposition reaction chamber, the flow direction is perpendicular to the direction of the titanium fiber sintered plate, and the molar ratio of the two gases is TaF 5 :H 2 =1:2.5, TaF 5 The flow rate is 1g / min, H 2 The flow rate is 1L / min, the carri...

Embodiment 2

[0066] Plasma-enhanced chemical vapor deposition (PECVD) was used to deposit a Ta corrosion-resistant layer on a 3D printed TC4 porous material with a porosity of 70% to prepare a corrosion-resistant 3D printed TC4 porous material, which can be used as a metal porous implant. The process is as follows:

[0067] The 3D printed TC4 porous material was sequentially subjected to alkaline washing, acid washing, deionized water washing and drying, and then placed in a chemical vapor deposition reaction chamber. TaCl 5 The solid material is heated above 150°C in a sealed evaporator to produce TaCl 5 The vapor pressure of the gas is 800Pa. Under the action of its own pressure, TaCl 5 Precursor gas directly into the deposition reaction chamber without carrier gas assisted transport, TaCl 5 The precursor gas flow rate was 3 g / min, H 2 The flow rate is 3L / min, and the molar ratio of the two gases is TaCl 5 :H 2 =1:6, the flow direction of the reaction gas is perpendicular to the sur...

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Abstract

The invention provides a corrosion-resistant metal porous material and a preparation method and application thereof, and relates to the technical field of metal porous materials. The corrosion-resistant metal porous material comprises a metal porous material base material and a corrosion-resistant deposition layer metallurgically bonded on the surface of a porous framework of the metal porous material base material through chemical vapor deposition, wherein the corrosion-resistant deposition layer is a metal Ta layer or a metal Mo layer or an alternate composite layer of the metal Ta layer andthe metal Mo layer. The metal porous material can be bonded with Ta and Mo at a melting point far lower than that of Ta and Mo through chemical vapor deposition, and the chemical vapor deposition hashigh diffractivity, so that Ta and Mo can evenly and compactly surround the surface of the metal porous framework, and the corrosion resistance of the metal porous material is improved. The corrosion-resistant metal porous material has good corrosion resistance in sulfuric acid, hydrofluoric acid, hydrochloric acid, nitric acid and mixed acid of the sulfuric acid, the hydrofluoric acid, the hydrochloric acid and the nitric acid.

Description

technical field [0001] The invention relates to the technical field of metal porous materials, in particular to a corrosion-resistant metal porous material and a preparation method and application thereof. Background technique [0002] Porous metal materials have excellent properties such as low density, high strength, controllable pore size and pore distribution, while maintaining good electrical and thermal conductivity and processability of metals, in addition to good heat insulation, sound absorption and excellent filtration performance , is a very potential structure-function integrated material. Metal porous materials include metal powder sintered porous materials, metal fiber porous materials, and foamed metals. Porous metal materials are widely used in textile products, filter materials, medical implants, key materials for new energy batteries and other fields, and are one of the focuses of new metal materials research. [0003] However, the metal porous material h...

Claims

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Application Information

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IPC IPC(8): C23C16/14C23C16/16C23C16/513
CPCC23C16/14C23C16/16C23C16/513
Inventor 葛鹏高建平卢广轩张欢任碧莹颜俏王晓哲
Owner WESTERN METAL MATERIAL
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