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Preparation method of CoMn spinel coating on SOFC (Solid Oxide Fuel Cell) metal connector surface

A technology of spinel coating and metal connector, which is applied in the direction of metal material coating process, coating, fuel cell, etc., and can solve the problems of complex equipment, high cost, poor bonding strength between coating and metal substrate, etc. , to achieve the effect of simple process method, improved preparation efficiency and low cost

Active Publication Date: 2015-06-03
兴化市青松农药化工有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The composition of the coating deposited by sputtering can be basically the same as that of the target material, but due to the uneven and preferential growth of the coating surface during the sputtering process, the coating has a certain surface roughness, and this method requires more complicated equipment. The process parameters are not easy to control, the cost is high, and the bonding strength between the coating and the metal substrate is not very good

Method used

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  • Preparation method of CoMn spinel coating on SOFC (Solid Oxide Fuel Cell) metal connector surface

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] 1) Metal surface pretreatment: use 400-1200 # Grind the sample step by step with a suitable sandpaper, put the sample in an acetone solution for ultrasonic-assisted degreasing and cleaning for 3 to 5 minutes, then rinse with deionized water, and dry it for later use.

[0030] 2) Deposition electrode surface pretreatment: the selected pure Co (purity greater than 99.9wt.%, the same as the following examples) and pure Mn (purity greater than 99.9wt.%, the same as the following examples) electrode rods (both diameters are 2mm) ) into acetone solution for ultrasonic-assisted degreasing for 3 to 5 minutes, then rinsed with deionized water, and dried for later use.

[0031] 3) Alloy coating formation process: use the selected metal sample as the base material, as the cathode in the deposition process, connect the cathode of the power supply equipment, select the first good Mn electrode as the deposition electrode, adjust the process parameters, and set the deposition process ...

Embodiment 2

[0033] 1) Metal surface pretreatment: use 400-1200 # Grind the sample step by step with a suitable sandpaper, put the sample in an acetone solution for ultrasonic-assisted degreasing and cleaning for 3 to 5 minutes, then rinse with deionized water, and dry it for later use.

[0034] 2) Surface pretreatment of the deposition electrode: put the selected pure Co and pure Mn electrode rods (both with a diameter of 1.5mm) into the acetone solution for ultrasonic-assisted degreasing and cleaning for 3-5 minutes, then rinse with deionized water, and dry them for later use .

[0035]3) Alloy coating formation process: use the selected metal sample as the base material, as the cathode in the deposition process, connect the cathode of the power supply equipment, select the processed Mn electrode as the deposition electrode, adjust the process parameters, and set the deposition Process parameters, the deposition voltage is 100V, the frequency is 400hz, the pulse width is 200μs, the powe...

Embodiment 3

[0037] 1) Metal surface pretreatment: use 400-1200 # Grind the sample step by step with a suitable sandpaper, put the sample in an acetone solution for ultrasonic-assisted degreasing and cleaning for 3 to 5 minutes, then rinse with deionized water, and dry it for later use.

[0038] 2) Surface pretreatment of the deposition electrode: put the selected pure Co and pure Mn electrode rods (0.5mm in diameter) into the acetone solution for ultrasonic-assisted degreasing and cleaning for 3-5 minutes, then rinse with deionized water, and dry them for later use .

[0039] 3) Alloy coating formation process: use the selected metal sample as the base material, as the cathode in the deposition process, connect the cathode of the power supply equipment, select the processed Mn electrode as the deposition electrode, adjust the process parameters, and set the deposition process Parameters, the deposition voltage is 80V, the frequency is 400hz, the pulse width is 200μs, the argon flow rate ...

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Abstract

The invention belongs to the technology of metal surface modification and in particular relates to a preparation method of a CoMn spinel coating on an SOFC (Solid Oxide Fuel Cell) metal connector surface. The preparation method comprises the following steps of: (1), pretreating the metal surface; (2), pretreating a deposition electrode; (3), preparing a microcrystalline coating; and (4), preoxidizing a coasting to form the CoMn spinel coating on the alloy coasting surface. The preparation method of the CoMn spinel coating on the SOFC metal connector surface is free of a process for pre-synthesizing cobalt-manganese spinel, simple in process method, low in cost, capable of improving the preparation efficiency of the cobalt-manganese spinel and capable of obtaining CoMn alloy layers of different thickness and different atomic ratios by changing process parameters. The alloy coatings are combined with the base body in a metallurgical manner, so that the binding force is strong and the coating is compact; moreover, the prepared coating can be used for effectively blocking the volatilization of the Cr; and besides, the strict working conditions of the SOFC metal connector surface can be satisfied as the CoMn coating applied by high-energy micro-arc spark deposition has a thermal expansion coefficient close to the ferrite stainless steel and has good conductive performances.

Description

technical field [0001] The invention belongs to the category of metal surface modification technology, in particular the technology of coating metal surface by high-energy micro-arc spark deposition technology. Background technique [0002] Solid oxide fuel cell (SOFC) is an efficient, clean and reliable power generation device, known as the most potential green energy in the 21st century, and its energy utilization rate can be as high as 80%, so it is favored by scientists from all over the world. At present, many developed countries are actively developing SOFC technology and hope to carry out commercial operation, because it is of great significance to alleviate the current energy crisis in various countries. In SOFCs, the linker material that connects the single cells plays a crucial role. On the one hand, it connects each single cell to improve the working efficiency of SOFC; on the other hand, the connector needs to isolate the oxygen on the cathode side from the fuel...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23C4/08C23C4/18H01M8/00H01M8/24H01M8/0297
CPCY02E60/50
Inventor 潘太军李杰张保汪涛贺云翔
Owner 兴化市青松农药化工有限公司
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