Zirconium oxide-graphite-like phase carbon nitride composite hydrogen resistance coating and preparation method thereof

A graphite phase carbon nitride and zirconia technology, applied in nitrogen compounds, chemical instruments and methods, coatings, etc., can solve the problem of large differences in thermal expansion coefficients between coatings and stainless steel substrates, low surface compactness of coatings, and easy generation. Cracks and other problems, to achieve the effect of improving the poor hydrogen barrier effect, excellent thermal stability and long service life

Inactive Publication Date: 2020-09-15
ZHEJIANG NIRUAN NEW MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Common hydrogen barrier coatings can be divided into three categories: oxide coatings, non-oxide coatings and composite coatings, but the existing hydrogen barrier coatings still have great deficiencies, which are generally manifested as: coating surface The density is not high, and cracks are easy to occur; the thermal expansion coefficient difference between the coating and the stainless steel substrate is large, so that the coating is easy to fall off; the thermal stability is poor, and the life of the material is short

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Step 1: Mix 32ml of propanol and 6.4ml of deionized water evenly, then add 1.92g of zirconium n-butoxide to the solution, stir in a water bath at 50°C for 30min, then transfer the solution to a reaction kettle to react at a temperature of 160°C , the reaction time is 18 h; after the reaction, 0.15 g of ethyl 3-ethoxy propionate was added to the solution and stirred for 10 min to obtain a Zr precursor solution. Mix 10g of melamine and 1g of thiourea evenly, put them into an aluminum oxide crucible, heat up to 550°C in a muffle furnace at a rate of 2°C / min, calcinate for 6h, and cool the obtained block g-C 3 N 4 Grind thoroughly in a mortar to obtain powdered g-C 3 N 4 .

[0020] Step 2: Clean the stainless steel substrate by immersing it in acetone and water successively, then take an appropriate amount of Zr precursor solution and apply it evenly on the stainless steel substrate with a scraper; then put the wet film in an oven at 80°C to dry for 15 minutes, and then ...

Embodiment 2

[0024] Step 1: Mix 57.6ml of propanol and 19.2ml of deionized water evenly, then add 3.84g of zirconium n-butoxide to the solution, stir in a water bath at 60°C for 25min, then transfer the solution to a reaction kettle at a temperature of 130°C Reaction, the reaction time is 24h; after the reaction, 0.3g of ethyl 3-ethoxypropionate was added to the solution and stirred for 5min to obtain a Zr precursor solution. Mix 6g of melamine and 1.33g of thiourea evenly, put them into an aluminum oxide crucible, heat up to 550°C at a rate of 2°C / min in a muffle furnace, calcinate for 4h, and cool the obtained block g-C 3 N 4 Grind thoroughly in a mortar to obtain powdered g-C 3 N 4 .

[0025] Step 2: Clean the stainless steel substrate by immersing it in acetone and water successively, then take an appropriate amount of Zr precursor solution and apply it evenly on the stainless steel substrate with a scraper; then put the wet film in an oven at 60°C for 30 minutes, and then dry it T...

Embodiment 3

[0029] Step 1: Mix 40ml of propanol and 10ml of deionized water evenly, then add 2.5g of zirconium n-butoxide to the solution, stir in a water bath at 55°C for 25min, then transfer the solution to a reaction kettle to react at a temperature of 150°C, The reaction time is 22 h; after the reaction, 0.2 g of ethyl 3-ethoxypropionate was added to the solution and stirred for 9 min to obtain a Zr precursor solution. Mix 8g of melamine and 1.6g of thiourea evenly, put them into an aluminum oxide crucible, raise the temperature to 550°C in a muffle furnace at a rate of 2°C / min, calcinate for 5h, and cool the obtained block g-C 3 N 4 Grind thoroughly in a mortar to obtain powdered g-C 3 N 4 .

[0030] Step 2: Clean the stainless steel substrate by immersing it in acetone and water successively, then take an appropriate amount of Zr precursor solution and apply it evenly on the stainless steel substrate with a spatula; then put the wet film in an oven at 70°C to dry for 20 minutes, ...

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Abstract

The invention belongs to the field of coating preparation, and specifically relates to a zirconium oxide-graphite-like phase carbon nitride composite hydrogen resistance coating and a preparation method thereof. The preparation method comprises the following steps that first Zr precursor liquid and powdered g-C3N4 are prepared; then the Zr precursor liquid is applied on a substrate to obtain a wetfilm, the film is calcined after drying, and then zirconium oxide on the surface of a sample is deposited again by an electrochemical deposition mode; the sample is finally covered with the g-C3N4 ina graphite boat to obtain the zirconium oxide-graphite-like phase carbon nitride composite hydrogen resistance coating. The prepared zirconium oxide-graphite-like phase carbon nitride composite hydrogen resistance coating has extremely high hydrogen resistance capability and a long service life.

Description

technical field [0001] The invention belongs to the field of coating preparation, and in particular relates to a zirconia-graphite-like carbon nitride composite hydrogen barrier coating and a preparation method thereof. Background technique [0002] Hydrogen is one of the new energy sources that is expected to replace petroleum as the mainstay of energy. It has the advantages of environmental protection, recyclability and high combustion energy. However, there are still many key problems to be solved for the practical application of hydrogen. [0003] The storage of hydrogen is an urgent problem that needs to be solved, which is directly related to all aspects of transportation and practical application of hydrogen after production. At present, the main hydrogen storage method in industrial applications is high-pressure hydrogen storage, which has the advantages of simple equipment structure and fast filling speed, and has great application potential. However, because hydr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C28/04C25D9/08C23C24/08C01B21/082
CPCC01B21/0605C23C24/082C23C28/042C25D9/08
Inventor 童化维
Owner ZHEJIANG NIRUAN NEW MATERIAL CO LTD
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