Method for preventing metal corrosion through graphene depending on crystal surface

[0017] Embodiment 1: A method for crystal plane-dependent graphene to protect metal corrosion, including the following steps:

[0018] (1) Graphene is grown on the surface of copper foil by atmospheric pressure chemical vapor deposition;

[0019] (2) Place the copper foil sample covered with graphene in the atmosphere and oxidize naturally for 1 month to 2 years;

[0020] (3) After the sample is naturally oxidized, directly observe with an optical microscope to see the protective effect of graphene on the copper foil.

[0021] Among them, graphene is grown on the metal foil by chemical vapor deposition, or is covered on the surface of the metal foil by transfer. The metal foil includes copper foil, nickel foil, etc., preferably copper foil. The specific copper crystal planes are all crystal planes such as Cu(111) and Cu(311) that are well matched with the graphene lattice.

[0022] The prepared foil covered with the Cu(111) crystal plane of graphene is placed in the atmosphere for natural oxidation for one year. After oxidation, the optical image is as figure 1 shown in a. Raman characterization of copper foil after oxidation, the results are as follows figure 1 Shown in b. by figure 1 a It can be seen that in the copper foil after one year of natural oxidation, the area covered by graphene has not been oxidized at all. The exposed copper foil area was oxidized to dark red. figure 1 b The copper foil covered with graphene does not see the Raman peak corresponding to cuprous oxide, which further confirms that the copper foil is well protected and not oxidized. It can be seen that the growth of graphene on copper foil with Cu(111) crystal planes can protect the copper foil from corrosion under natural oxidation conditions.

[0023] Test 1: A method of crystal plane-dependent graphene protection against metal corrosion in this test is carried out according to the following steps:

[0024] (1) Graphene is grown on the copper foil surface of Cu(111) crystal plane by atmospheric pressure chemical vapor deposition method;

[0025] (2) Place the copper foil sample covered with graphene in the atmosphere and oxidize naturally for 2 years;

[0026] (3) After the sample is naturally oxidized, directly observe with an optical microscope to see the protective effect of graphene on the copper foil.

[0027] Under the test conditions, graphene has a very good protective effect on Cu(111).

[0028] Test 2: The method for protecting metal corrosion by graphene dependent on crystal planes in this test is carried out according to the following steps:

[0029] (1) Graphene is grown on the copper foil surface of Cu(311) crystal plane by atmospheric pressure chemical vapor deposition method;

[0030] (2) Place the copper foil sample covered with graphene in the atmosphere and oxidize naturally for 2 years;

[0031] (3) After the sample is naturally oxidized, directly observe with an optical microscope to see the protective effect of graphene on the copper foil.

[0032] Under the test conditions, graphene has a very good protective effect on Cu(311). by figure 2 a It can be seen that the copper foil covered with graphene is not oxidized and corroded.

[0033] Test 3: The method for protecting metal corrosion with graphene dependent on crystal planes in this test is carried out according to the following steps:

[0034] (1) Graphene is grown on the copper foil surface of Cu(111) crystal plane by atmospheric pressure chemical vapor deposition method;

[0035] (2) Place the copper foil sample covered with graphene on the top of the water bath, smoke it with hot water, the temperature is about 50℃, and the time is 8h;

[0036] (3) After the sample is smoked, directly observe with an optical microscope to see the protective effect of graphene on the copper foil.

[0037] Under the test conditions, graphene has a very good protective effect on Cu(111). The copper foil covered with graphene is not corroded by oxidation.

[0038] Test 4: The method for protecting metal corrosion by graphene dependent on crystal planes in this test is carried out according to the following steps:

[0039] (1) Graphene is grown on the copper foil surface of Cu(311) crystal plane by atmospheric pressure chemical vapor deposition method;

[0040] (2) Place the copper foil sample covered with graphene on the top of the water bath, smoke it with hot water, the temperature is about 50℃, and the time is 8h;

[0041] (3) After the sample is smoked, directly observe with an optical microscope to see the protective effect of graphene on the copper foil.

[0042] Under the test conditions, graphene has a very good protective effect on Cu(311). The copper foil covered with graphene is not corroded by oxidation.

[0043] In the above-mentioned test 1 to test 4, the copper foil crystal planes that are well matched with the graphene crystal plane and have a strong coupling effect are selected. It can be seen that on these crystal faces, whether it is natural oxidation or hot water vapor fumigation, graphene can well protect the copper foil from being oxidized and corroded.