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Method for preparing passivation film doped with graphene oxide

A graphene, passivation film technology, applied in the direction of metal material coating process, etc., to achieve high corrosion resistance, smooth surface, good bonding effect.

Inactive Publication Date: 2016-03-02
SHANGHAI INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The application of graphite oxide in passivation is seldom, and the application of graphite oxide as an additive in the passivation film of low carbon steel needs further research

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] The specifications of the low carbon steel substrate are: 10mm×10mm×3mm.

[0019] ① Polishing of low-carbon steel sheet: Use 400#, 800#, 1200#, 2000# metallographic sandpaper to polish and polish to remove the oxide layer on the surface of the low-carbon steel sheet. Then rinse with deionized water and set aside.

[0020] ② Degreasing of low-carbon steel sheets: put the low-carbon steel sheets in 100ml of absolute ethanol, and ultrasonically treat them at 25°C for 5 minutes to remove oil stains. Then rinse with deionized water and set aside.

[0021] ③Activation of the low-carbon steel sheet: put the low-carbon steel sheet into 100ml of 3wt% nitric acid solution, treat it at 25°C for 5 seconds, then rinse it repeatedly with deionized water, and set it aside.

[0022] ④Sensitization of graphene oxide: get 2g graphene oxide, add to 50ml concentration and be 30g / L Sn(NO 3 ) 2 and 25ml / L of HNO 3 In the mixed solution, ultrasonically disperse at 30°C for 30 minutes, se...

Embodiment 2

[0029] The specifications of the low carbon steel substrate are: 10mm×10mm×3mm.

[0030] ① Polishing of low-carbon steel sheet: Use 400#, 800#, 1200#, 2000# metallographic sandpaper to polish and polish to remove the oxide layer on the surface of the low-carbon steel sheet. Then rinse with deionized water and set aside.

[0031] ② Degreasing of low-carbon steel sheets: put the low-carbon steel sheets in 100ml of absolute ethanol, and ultrasonically treat them at 25°C for 5 minutes to remove oil stains. Then rinse with deionized water and set aside.

[0032] ③Activation of the low-carbon steel sheet: put the low-carbon steel sheet into 100ml of 3wt% nitric acid solution, treat it at 25°C for 5 seconds, then rinse it repeatedly with deionized water, and set it aside.

[0033] ④Sensitization of graphene oxide: get 2g graphene oxide, add to 50ml concentration and be 30g / L Sn(NO 3 ) 2 and 25ml / L of HNO 3 In the mixed solution, ultrasonically disperse at 30°C for 30 minutes, se...

Embodiment 3

[0040] The specifications of the low carbon steel substrate are: 10mm×10mm×3mm.

[0041] ① Polishing of low-carbon steel sheet: Use 400#, 800#, 1200#, 2000# metallographic sandpaper to polish and polish to remove the oxide layer on the surface of the low-carbon steel sheet. Then rinse with deionized water and set aside.

[0042] ② Degreasing of low-carbon steel sheets: put the low-carbon steel sheets in 100ml of absolute ethanol, and ultrasonically treat them at 25°C for 6 minutes to remove oil stains. Then rinse with deionized water and set aside.

[0043] ③Activation of low-carbon steel sheet: put the low-carbon steel sheet into 100ml of 1wt% nitric acid solution, treat it at 25°C for 10 seconds, then rinse it repeatedly with deionized water, and set it aside.

[0044] ④ graphene sensitization: get 2g graphene powder, add to 50ml concentration and be 30g / L Sn(NO 3 ) 2 and 25ml / L of HNO 3 In the mixed solution, ultrasonically disperse at 30°C for 30 minutes, separate, th...

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Abstract

The invention discloses a method for preparing a passivation film doped with graphene oxide. The method comprises the steps that firstly, a low-carbon steel base body is pretreated, and sensibilization, activation and dispersion treatment are conducted on the graphene oxide; and secondly, passivation treatment is conducted in a constant-temperature water bath, and then the passivation film doped with the graphene oxide is obtained on the surface of the low-carbon steel. The method for preparing the passivation film doped with the graphene oxide has the beneficial effects that the thickness of the prepared passivation film doped with the graphene oxide is uniform, the surface of the prepared passivation film doped with the graphene oxide is smooth and free of gaps, the corrosion resistance is good, and the weather resistance is high; in addition, the preparation method is simple, and continuous production can be achieved.

Description

technical field [0001] The invention relates to the technical field of material preparation, in particular to a method for preparing a graphene oxide doped passivation film. Background technique [0002] After the metal is treated with an oxidizing medium, its corrosion rate is significantly lower than that before the original untreated phenomenon, which is called the passivation of the metal. The passivation mechanism can be mainly explained by the thin film theory, that is, the passivation is due to the interaction between the metal and the oxidizing medium, and a very thin, dense, good covering performance, which can firmly adhere to the metal surface, is formed on the metal surface. Passive film on the surface. This film exists as a separate phase, usually a compound of oxygen and metal. It plays the role of completely separating the metal from the corrosive medium, preventing direct contact between the metal and the corrosive medium, so that the metal basically stops ...

Claims

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Application Information

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IPC IPC(8): C23C22/62C23C22/78
CPCC23C22/73C23C22/62C23C22/78
Inventor 韩生付宁冯晨萁钱炜蒋继波叶冯英
Owner SHANGHAI INST OF TECH