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Preparation method for preparing graphene oxide anti-corrosion protective film on metal surface

An anti-corrosion, metal surface technology, applied in metal material coating process, coating, etc., can solve the problems of less film deposition times, slow release efficiency and poor wear resistance

Inactive Publication Date: 2017-10-13
INST OF OCEANOLOGY - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

So far, there are few reports on modified graphene oxide multilayer self-assembled films. The films studied before have few deposition times, slow release efficiency and wear resistance.

Method used

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  • Preparation method for preparing graphene oxide anti-corrosion protective film on metal surface
  • Preparation method for preparing graphene oxide anti-corrosion protective film on metal surface
  • Preparation method for preparing graphene oxide anti-corrosion protective film on metal surface

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] 1) Preparation of Ce-CF conversion film on aluminum alloy surface

[0028] Use sandpaper to polish the 2A12 aluminum alloy test piece to remove impurities and oxide film until a bright surface appears, then rinse it with distilled water, then ultrasonically clean it with acetone, dry it and use it as a blank sample for later use. Hang the processed aluminum alloy bare chip with a clean wire and put it into a beaker filled with 0.5mol / L cerium nitrate solution for 30 minutes for later use. Put the cerium nitrate-treated test piece into an oven preheated to 80 degrees Celsius and bake for 30 minutes to obtain the Ce-CF conversion coating.

[0029] 2) Preparation of LBL-1 self-assembled film on aluminum alloy surface

[0030] Put the aluminum alloy test piece of the surface Ce-CF conversion film prepared above into a beaker containing 4mg / ml PEI and soak for 5 minutes, take it out in a beaker containing distilled water for 2 minutes, then put it into a beaker containing 4...

Embodiment 2

[0041] 1) Preparation of Ce-CF conversion film on aluminum alloy surface

[0042] Use sandpaper to polish the aluminum alloy test piece to remove impurities and oxide film until a bright surface appears, then rinse it with distilled water quickly, then use ethanol to ultrasonically clean it, dry it and use it as a blank sample for later use. Hang the treated aluminum alloy die with a clean wire and put it into a beaker filled with 0.8mol / L cerium nitrate solution and soak for 20 minutes for later use. Put the cerium nitrate-treated test piece into an oven preheated to 60 degrees Celsius and bake for 50 minutes to obtain the Ce-CF conversion coating.

[0043] 2) Preparation of LBL-1 self-assembled film on aluminum alloy surface

[0044] Put the titanium alloy test piece of the surface Ce-CF conversion film prepared above into the beaker containing 6mg / ml PEI and soak for 15 minutes, take it out in the beaker with distilled water for 8 minutes, then put it into the beaker conta...

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Abstract

The invention relates to a marine anti-corrosion protective film material, in particular to a marine anti-corrosion protective film prepared by adding graphene oxide on a metal surface by a layer-by-layer self-assembly LBL technology, and a method of the marine anti-corrosion protective film. The method comprises the following steps: soaking a pretreated aluminum alloy test sample in a cerous nitrate solution, drying at high temperature after soaking, depositing polyethyleneimine (PEI) and polyacrylic acid (PAA) layers on the test sample by the layer-by-layer self-assembly technology after drying, performing deposition of graphene oxide, and finally performing deposition of the PEI layer and the PAA layer for one time so as to realize multi-layer circulation electrochemical deposition and prepare the graphene oxide anti-corrosion protective film. The corrosion inhibition efficiency of the multi-layer self-assembly film with graphene oxide on the surface of the aluminum alloy in a 3.5 percent NaCl solution exceeds 99 percent, the corrosion inhibition efficiency of the multi-layer self-assembly film after friction is conducted by 200 mm or 400 mm exceeds 96 percent, and huge potential application is achieved in the marine anti-corrosion protection aspect.

Description

technical field [0001] The invention relates to a marine anti-corrosion protective film material, in particular to a method for preparing a marine anti-corrosion protective film by adding graphene oxide on a metal surface using layer-by-layer self-assembly technology (LBL). Background technique [0002] In recent years, with the continuous research of aluminum alloy materials by scientific research, the excellent characteristics of high strength and low density of aluminum alloy make it increase year by year in the application of national production, but the resulting corrosion loss of aluminum alloy It is also becoming more and more prominent, which is 6 times the comprehensive loss of natural disasters. The oxide film on the surface of the aluminum alloy material is extremely vulnerable to the erosion of chloride ions in the marine environment, causing corrosion damage and losing its basic properties, causing great harm to the economy. Layer-by-layer self-assembly technol...

Claims

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Application Information

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IPC IPC(8): C09D179/02C09D133/02C23C22/56
CPCC09D133/02C09D179/02C23C22/56
Inventor 赵霞纪小红金祖权孙晓麟朱庆军朱素兰侯保荣
Owner INST OF OCEANOLOGY - CHINESE ACAD OF SCI
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