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Method for testing conversion potential of amorphous strip passive film by using constant current method

A technology of constant current and passivation film, applied in measuring devices, material analysis through electromagnetic means, instruments, etc., can solve the problem of when the passivation film will be damaged, so as to improve the service life, expand the application prospect and expand the application field effect

Active Publication Date: 2021-03-09
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Amorphous strips with good corrosion resistance will have a long passivation plateau on the TAFEL curve, which is the cause of the passivation film, but there are few methods to verify when the passivation film is produced and when it is destroyed. destroy

Method used

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  • Method for testing conversion potential of amorphous strip passive film by using constant current method
  • Method for testing conversion potential of amorphous strip passive film by using constant current method
  • Method for testing conversion potential of amorphous strip passive film by using constant current method

Examples

Experimental program
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Effect test

Embodiment 1

[0034] A method for obtaining transition potential by constant current method, comprising the steps of:

[0035] Step 1, weighing pure iron (>99.5wt.%), Fe-B, Fe-Nb according to the corresponding atomic ratio, mixing them and putting them into a resistance furnace for melting.

[0036] Step 2, the Fe 87-x B 13 Nb x (x=0, 7 and 10) The three kinds of alloy ingots are respectively placed in the quartz tube and heated and melted in the induction coil. When the rotation speed of the copper roller is 4000r / min, it will have been melted into liquid Fe 87-x B 13 Nb x (x = 0, 7 and 10) alloys are sprayed onto copper rolls to obtain Fe 87-x B 13 Nb x (x = 0, 7 and 10) Three amorphous strips.

[0037] In step 3, the strip is placed in a three-electrode workstation to test the TAFEL curve to obtain a passivation platform, and a potential value point is selected from the passivation platform.

[0038] Step 4, according to the selected potential value point, according to the const...

Embodiment 2

[0041] A method for obtaining transition potential by constant current method, comprising the steps of:

[0042] Step 1, weigh pure iron (>99.5wt.%) and Fe-B, Fe-Nb according to the corresponding atomic ratio, mix them and put them into a resistance furnace for melting.

[0043] Step 2, the Fe 87-x B 13 Nb x (x=0, 7 and 10) The three kinds of alloy ingots are respectively placed in the quartz tube and heated and melted in the induction coil. When the rotation speed of the copper roller is 3800r / min, it will have been melted into liquid Fe 87-x B 13 Nb x (x = 0, 7 and 10) alloys are sprayed onto copper rolls to obtain Fe 87-x B 13 Nb x (x = 0, 7 and 10) Three amorphous strips.

[0044] In step 3, the strip is placed in a three-electrode workstation to test the TAFEL curve to obtain a passivation platform, and a potential value point is selected from the passivation platform.

[0045] Step 4, according to the selected potential value point, according to the constant curre...

Embodiment 3

[0048] A method for obtaining transition potential by constant current method, comprising the steps of:

[0049] Step 1, weigh pure iron (>99.5wt.%) and Fe-B, Fe-Nb according to the corresponding atomic ratio, mix them and put them into a resistance furnace for melting.

[0050] Step 2, the Fe 87-x B 13 Nb x (x=0, 7 and 10) The three kinds of alloy ingots are respectively placed in the quartz tube and heated and melted in the induction coil. When the rotation speed of the copper roller is 3600r / min, it will be melted into liquid Fe 87-x B 13 Nb x (x = 0, 7 and 10) alloys are sprayed onto copper rolls to obtain Fe 87-x B 13 Nb x (x = 0, 7 and 10) Three amorphous strips.

[0051] In step 3, the strip is placed in a three-electrode workstation to test the TAFEL curve to obtain a passivation platform, and a potential value point is selected from the passivation platform.

[0052] Step 4, according to the selected potential value point, according to the constant current me...

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Abstract

The invention relates to the technical field of amorphous strip passive film conversion potential, in particular to a method for testing a conversion potential of an amorphous strip passive film by using a constant current method, which comprises the following steps of: placing an amorphous strip in a three-electrode workstation, testing a TAFEL curve to obtain a passivation platform, and selecting a potential value point from the passivation platform; and for the selected potential value point, carrying out testing according to a constant current method to obtain the conversion potential of the amorphous strip. According to the method, the application fields of the iron-based alloy and the amorphous material are expanded, the amorphous material can be applied to more actual production, the greater effect of the amorphous alloy is exerted, and the amorphous alloy has a greater application prospect.

Description

technical field [0001] The invention relates to the technical field of testing the change of an amorphous strip passivation film, in particular to a method for testing the transition potential of an amorphous strip passivation film by using a constant current method. Background technique [0002] The information disclosed in this background section is only intended to increase the understanding of the general background of the present invention, and is not necessarily taken as an acknowledgment or any form of suggestion that the information constitutes the prior art already known to those skilled in the art. [0003] Amorphous alloys refer to metals and alloys whose internal atoms are arranged in short-range order and long-range disorder, and at the same time have the characteristics of metal and glass, also known as metallic glass or glassy alloy. Amorphous alloys are considered to have good wear resistance and corrosion resistance because of their microstructure defects su...

Claims

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Application Information

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IPC IPC(8): G01N27/416
CPCG01N27/4161
Inventor 王伟民张昊闫芝成
Owner SHANDONG UNIV
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