Anticorrosion and antibacterial surface treatment method for stainless steel

An anti-corrosion, anti-bacterial and surface treatment technology, applied in anodizing, electrolytic organic material coating, etc., can solve problems such as environmental pollution, poor long-term protection performance of nano-anti-fouling coating on micro-arc oxidation surface, and weak matrix adhesion. , to ensure the service life, excellent anti-corrosion and antibacterial properties, and prolong the protection time.

Pending Publication Date: 2022-03-25
INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In view of the above problems, the purpose of the present invention is to provide a stainless steel anti-corrosion and anti-bacterial surface treatment method, to solve the problem of environmental pollution caused by the release of anti-fouling agent in the prior art, and to solve the problem of environmental pollution caused by the release of anti-fouling agents, and the nano-anti-fouling coating on the surface of micro-arc oxidation The long-term protection performance of the layer is not good and there are shortcomings such as weak matrix bonding force

Method used

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  • Anticorrosion and antibacterial surface treatment method for stainless steel
  • Anticorrosion and antibacterial surface treatment method for stainless steel
  • Anticorrosion and antibacterial surface treatment method for stainless steel

Examples

Experimental program
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Effect test

Embodiment 1

[0032] In this example, the preparation process of the surface nanohole array is as follows:

[0033] (1) Use a measuring cylinder to measure 50ml of perchloric acid with a mass concentration of 71-73% and dissolve it in 960ml of ethylene glycol solution. After it is completely dissolved, oscillate ultrasonically for 5 minutes to ensure uniform dissolution.

[0034] (2) Use SiC sandpaper to grind the 304 stainless steel sheet step by step to 2000# for later use. Before use, ultrasonically clean it in anhydrous ethanol for 5 minutes to completely wash off the surface oil and impurities. Take it out and dry it. Solder the wire on one side and seal it with epoxy resin , only keep the work surface to be processed.

[0035] (3) The temperature of the solution is set to 5°C, and the rotor speed is set to gear 1 (DF1 collector heating stirrer). After the temperature in the beaker is constant, use the TPN-F2011D regulated power supply to adjust to the constant voltage mode, and adjust...

Embodiment 2

[0038] In this embodiment, the preparation process of the composite galvanized layer on the surface of the nanohole array is as follows:

[0039] (1) Weigh 250g ZnSO with a balance with an accuracy of 0.0001g 4 7H 2 O, 80g Na 2 SO 4 , 26g H 3 BO 3 and 40g Al 2 (SO 4 ) 3 18H 2 O, completely dissolved in pure water to make 1L of galvanizing solution.

[0040] (2) Weigh 0.29g of 4,5-dichloro-N-octyl-4-isothiazolin-3-one (DCOIT) with a balance with an accuracy of 0.0001g, and dissolve it in the galvanizing solution of step (1) .

[0041] (3) Use the TPN-F2011D regulated power supply, adjust to constant current mode, use pure zinc sheet as the anode, and prepare the 304 stainless steel sample to be plated in Example 1 (with a nanopore array on the surface) as the cathode, at 7.5mA / cm 2 At a constant current density, the electrodeposition activation time is 2 hours, and the galvanized layer (composite galvanized layer) loaded with the fungicide DCOIT can be prepared, an...

Embodiment 3

[0045] In the present embodiment, the anti-microbial corrosion performance of the composite galvanized layer is as follows:

[0046] The 304 stainless steel base material, the 304 stainless steel with nanopore array on the surface prepared in embodiment 1 and the composite galvanized layer prepared in embodiment 2 were soaked in the salt solution containing marine corrosive microorganism sulfate reducing bacteria (SRB) for 48 hours, Electrochemical impedance spectroscopy was used to evaluate the SRB corrosion resistance of the three materials, and the results were as follows image 3 As shown, it can be seen from the figure that the capacitive arc radius of the composite galvanized layer is significantly larger than that of the other two materials, indicating that the composite galvanized layer can well inhibit the corrosion of SRB on the 304 stainless steel substrate.

[0047] The results of the examples show that the present invention can improve the binding force between th...

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Abstract

The invention belongs to the field of metal corrosion prevention, and particularly relates to a stainless steel anti-corrosion and antibacterial surface treatment method. According to the method, firstly, a nanopore array is prepared on the surface of stainless steel through an anodic oxidation method, and then a composite zinc coating loaded with an organic antifouling agent is prepared on the surface of the nanopore array through a constant-current polarization method. According to the invention, the binding force between the composite zinc coating and the matrix can be improved, the load capacity of the antifouling agent is increased, the microbial corrosion protection capability of the composite zinc coating is improved, and the composite zinc coating can be applied to the stainless steel surface, so that the stainless steel surface has anticorrosive and antibacterial properties.

Description

technical field [0001] The invention belongs to the field of metal anticorrosion, and in particular relates to a stainless steel anticorrosion and antibacterial surface treatment method. Background technique [0002] Stainless steel is widely used in marine engineering because of its excellent corrosion resistance. In recent years, with the development of deep sea resources, the demand and practical application of stainless steel have grown rapidly. However, stainless steel is extremely vulnerable to microbial adhesion and microbial corrosion in complex marine environments. Therefore, solving the problem of microbial corrosion and fouling of stainless steel in complex marine environments is one of the keys to the large-scale application and long-term service of stainless steel equipment. [0003] At present, antifouling coatings and micro-arc oxidation surface nano-antifouling coatings are relatively effective technologies for microbial corrosion protection of stainless st...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25D11/34C25D3/22C25D9/02
CPCC25D11/34C25D3/22C25D9/02
Inventor 王政彬刘晓源杨杰郑玉贵
Owner INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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