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Method for covering surface of stainless steel with film

A stainless steel and film coating technology, applied in liquid chemical plating, metal material coating process, coating and other directions, can solve the problems of stainless steel pitting corrosion, platelet activation, material mechanical properties reduction, etc., to achieve low interfacial tension, easy to repeat , the effect of dense surface structure

Inactive Publication Date: 2018-08-21
徐州市贾汪区怀强工贸有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, various particles in the blood tend to cause pitting corrosion on the surface of stainless steel, resulting in a decrease in the mechanical properties of the material. At the same time, the dissolved nickel ions and chromium ions can induce platelet activation, thereby causing thrombus.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] A method for coating a stainless steel surface, comprising the steps of:

[0016] (1) Using tetrabutyl titanate as raw material, ethanol as sol, and concentrated nitric acid as catalyst, the solution composition is 1:30:0.5;

[0017] (2) Dissolve tetrabutyl titanate in half of the total amount of ethanol, and stir for 1 h; then dissolve concentrated nitric acid and water in the other half of ethanol, and add it to the stirring tetrabutyl titanate solution, and continue stirring for 1 h to obtain Uniform and transparent precursor solution, ready for use;

[0018] (3) A stainless steel sheet is used as the substrate for film deposition, and the stainless steel substrate is cleaned and dried with acetone, absolute ethanol, and deionized water in sequence;

[0019] (4) Utilize TiO 2 Prepare dry gel powder from sol, and anneal the gel; coat sol TiO on stainless steel substrate 2 , and then heat-treated in a drying oven, and finally annealed in a quartz tube furnace at 400...

Embodiment 2

[0023] A method for coating a stainless steel surface, comprising the steps of:

[0024] (1) Using tetrabutyl titanate as raw material, ethanol as sol, and concentrated nitric acid as catalyst, the solution composition is 1:30:0.5;

[0025] (2) Dissolve tetrabutyl titanate in half of the total amount of ethanol, and stir for 2 hours; then dissolve concentrated nitric acid and water in the other half of ethanol, and add it to the stirring tetrabutyl titanate solution, and continue stirring for 2 hours to obtain Uniform and transparent precursor solution, ready for use;

[0026] (3) A stainless steel sheet is used as the substrate for film deposition, and the stainless steel substrate is cleaned and dried with acetone, absolute ethanol, and deionized water in sequence;

[0027] (4) Utilize TiO 2 Prepare dry gel powder from sol, and anneal the gel; coat sol TiO on stainless steel substrate 2 , and then heat-treated in a drying oven, and finally annealed in a quartz tube furnac...

Embodiment 3

[0030] A method for coating a stainless steel surface, comprising the steps of:

[0031] (1) Using tetrabutyl titanate as raw material, ethanol as sol, and concentrated nitric acid as catalyst, the solution composition is 1:30:0.5;

[0032] (2) Dissolve tetrabutyl titanate in half of the total amount of ethanol, and stir for 1.5h; then dissolve concentrated nitric acid and water in the other half of ethanol, and add it to the stirring tetrabutyl titanate solution, and continue stirring for 1.5h , to obtain a uniform and transparent precursor solution, ready to use;

[0033] (3) A stainless steel sheet is used as the substrate for film deposition, and the stainless steel substrate is cleaned and dried with acetone, absolute ethanol, and deionized water in sequence;

[0034] (4) Utilize TiO 2 Prepare dry gel powder from sol, and anneal the gel; coat sol TiO on stainless steel substrate 2 , and then heat-treated in a drying oven, and finally annealed in a quartz tube furnace a...

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PUM

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Abstract

The invention discloses a method for covering the surface of a stainless steel with a film. The method comprises the following steps: dissolving tetrabutyl titanate into one half of ethyl alcohol, andstirring for 1-2h; dissolving concentrated nitric acid and water into the other half of ethyl alcohol, and adding the mixture to a tetrabutyl titanate solution in stirring; continuously stirring for1-2h to obtain a uniform and transparent precursor solution; preparing a stainless steel sheet as a substrate for film deposition; sequentially washing the stainless steel substrate with acetone, absolute ethyl alcohol and deionized water, and then drying; preparing xerogel powder from sol, and annealing the gel; coating the stainless steel substrate with the sol; thermally processing in a dryingbox; and then annealing for 1-2h through a quartz tubular furnace at the temperature of 400-500 DEG C. The preparation method is simple and easy to repeat; the prepared stainless steel is dense in surface structure, and the contact angle is 80 degrees; the self-corrosion current of the stainless steel in simulated body fluid is 5.33 microamperes per square centimeter; the stainless steel is low ininterfacial tension with blood, and is high in compatibility to blood and high in corrosion resistance.

Description

technical field [0001] The invention relates to a method for coating a stainless steel surface, belonging to the field of metal material processing. Background technique [0002] Stainless steel has the advantages of low price, good mechanical properties and easy forming. As a biomedical implant material, it has been widely used in the medical field. However, various particles in the blood tend to cause pitting corrosion on the surface of stainless steel, resulting in a decrease in the mechanical properties of the material. At the same time, the dissolved nickel ions and chromium ions can induce platelet activation, thereby causing thrombus. Therefore, how to improve the biocompatibility of stainless steel is an urgent problem to be solved. Contents of the invention [0003] Aiming at the above-mentioned problems in the prior art, the object of the present invention is to provide a method for coating the surface of stainless steel. The preparation method is simple and eas...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C18/12
CPCC23C18/1216C23C18/1254C23C18/1291
Inventor 庄怀强
Owner 徐州市贾汪区怀强工贸有限公司