A method for characterizing microcorrosion characteristics of enamel-coated low-carbon steel surfaces using wire beam electrodes

A technology of tow electrode and low carbon steel, which is applied in the field of metal electrochemical micro-testing, can solve the problems of tow electrode characterizing the corrosion resistance of metal alloy corrosion-resistant nano-enamel coating surface micro-area corrosion characteristics, etc., and achieves the convenience of continuous monitoring and automation. High, measurement accuracy and reliability results

Active Publication Date: 2021-05-07
SHANGHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, there are still few studies on corrosion-resistant enamel coatings, especially metal alloy corrosion-resistant nano-enamel coatings, and there is no literature record on the use of wire beam electrodes to characterize the surface micro-corrosion characteristics of metal alloy corrosion-resistant nano-enamel coatings

Method used

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  • A method for characterizing microcorrosion characteristics of enamel-coated low-carbon steel surfaces using wire beam electrodes
  • A method for characterizing microcorrosion characteristics of enamel-coated low-carbon steel surfaces using wire beam electrodes
  • A method for characterizing microcorrosion characteristics of enamel-coated low-carbon steel surfaces using wire beam electrodes

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Embodiment 1

[0022] In this embodiment, a method for characterizing micro-area corrosion characteristics of a low-carbon steel surface coated with an enamel layer by using a wire beam electrode comprises the following steps:

[0023] a. Preparation of enamel sample: prepare enamel powder with a set composition formula to obtain nano-sized enamel powder with a particle size diameter of 10-900 microns; combine a certain amount of cobalt oxide and a certain amount of nickel oxide together Mix and fully stir with a certain amount of ethanol and nano-enamel powder to make a slurry with a certain viscosity, which is used as a sintered coating material for later use, wherein the amount of ethanol added is 10% of the mass of the slurry, and cobalt oxide and oxide The amount of nickel added is 1.5% and 3% of the mass of the slurry respectively, and the viscosity of the slurry is controlled to be 6Pa·s, and then the slurry after stirring is taken out, and then the slurry is evenly coated on a low-car...

Embodiment 2

[0032] This embodiment is basically the same as Embodiment 1, especially in that:

[0033] In this embodiment, a method for characterizing micro-area corrosion characteristics of a low-carbon steel surface coated with an enamel layer by using a wire beam electrode comprises the following steps:

[0034]a. Preparation of enamel sample: prepare enamel powder with a set composition formula to obtain nano-sized enamel powder with a particle size diameter of 10-900 microns; combine a certain amount of cobalt oxide and a certain amount of nickel oxide together Mix and fully stir with a certain amount of ethanol and nano-enamel powder to make a slurry with a certain viscosity, which is used as a sintered coating material for later use, wherein the amount of ethanol added is 10% of the mass of the slurry, and cobalt oxide and oxide The amount of nickel added is 1.5% and 3% of the mass of the slurry respectively, and the viscosity of the slurry is controlled to be 6Pa·s, and then the s...

Embodiment 3

[0042] This embodiment is basically the same as the previous embodiment, and the special features are:

[0043] In this embodiment, a method for characterizing micro-area corrosion characteristics of a low-carbon steel surface coated with an enamel layer by using a wire beam electrode comprises the following steps:

[0044] a. Preparation of enamel sample: prepare enamel powder with a set composition formula to obtain nano-sized enamel powder with a particle size diameter of 10-900 microns; combine a certain amount of cobalt oxide and a certain amount of nickel oxide together Mix and fully stir with a certain amount of ethanol and nano-enamel powder to make a slurry with a certain viscosity, which is used as a sintered coating material for later use, wherein the amount of ethanol added is 10% of the mass of the slurry, and cobalt oxide and oxide The amount of nickel added is 1.5% and 3% of the mass of the slurry respectively, and the viscosity of the slurry is controlled to be...

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Abstract

The invention discloses a method for characterizing micro-corrosion characteristics of a low-carbon steel surface coated with an enamel layer by using a wire-beam electrode. For the inhibitory effect of the corrosive solution, the present invention uses a multi-electrode coupling system. When all metal wires are short-circuited together, their electrochemical behavior is regarded as an integral electrode. At this time, the open circuit potential is called the overall potential, that is, the coupling potential of all single electrodes. On this basis, the corrosion of the material at different times was characterized. The surface potential and current scanning of wire beam electrodes can better characterize the occurrence and development process of local corrosion of carbon steel in corrosion solution in time and space; at the same time, the local corrosion factor can quantitatively characterize the inhomogeneous characteristics of WBE surface corrosion and the effect of corrosion inhibitor on The repair ability of localized corrosion, the use of wire beam electrodes can be very effective in characterizing the micro-corrosion of materials and the protective effect of coatings on the substrate and the inhibition of corrosion ions.

Description

technical field [0001] The present invention relates to a method for metal corrosion detection and evaluation, in particular to a method for corrosion detection and evaluation of low-carbon steel with an anti-corrosion coating, and also relates to a high-throughput detection of the influence of metal corrosion resistance The method is applied in the technical field of metal electrochemical microscopic testing. Background technique [0002] As early as the 19th century, human beings have realized the huge loss and harm caused by metal corrosion. Scholars at home and abroad have carried out a lot of research on the mechanism and protection of metal corrosion. The metal corrosion process is very complicated, and the activity of the corrosion interface is difficult to be completely consistent. Often, the corrosion rate and corrosion depth in a local area are much greater than the average value of the entire interface, and local corrosion occurs. The main cause of localized corr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N17/02G01N1/28
CPCG01N1/28G01N17/006G01N17/02
Inventor 钟庆东李谦李育霖黄哲瑞肖晨陈串徐云祥
Owner SHANGHAI UNIV
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