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Method for testing anti-corrosion performance of metallic equipment under island environment

A test method and metal sample technology, applied in the direction of measuring devices, weather resistance/light resistance/corrosion resistance, instruments, etc., can solve problems such as metal structure damage, reduce the strength and reliability of metal equipment, and damage the metal itself to achieve reliable operation Effect

Inactive Publication Date: 2016-10-12
NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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Problems solved by technology

[0002] Metal corrosion is a spontaneous destruction process of metal. Its harm is not only damage to the metal itself, but more importantly, damage to the metal structure and reduce the strength and reliability of metal equipment.

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  • Method for testing anti-corrosion performance of metallic equipment under island environment
  • Method for testing anti-corrosion performance of metallic equipment under island environment

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Embodiment Construction

[0027] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0028] A test method for anticorrosion performance of metal equipment in an island environment, which is used to test the corrosion of different coatings in different environments, so as to provide a theoretical basis for selecting a suitable coating for metal equipment in a specific island environment. The method specifically includes the following steps:

[0029] A. Test the potentiodynamic polarization curve of coated metal equipment, and fit the AC impedance spectrum and self-corrosion potential of coated metal equipment. In this embodiment, metal equipment with three different coatings are selected for testing, and the three coatings include hot-dip aluminizing, hot-dip galvanizing and hot-dip aluminizing.

[0030] This step specifically includes the following:

[0031] A1. Place the coated metal sample in the three-electrode t...

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Abstract

The invention discloses a method for testing anti-corrosion performance of metallic equipment under an island environment. The method specifically comprises the following steps: A, testing a potentiodynamic polarization curve of a metal sample with a coating, and fitting an alternate-current impedance spectrum and a self-corrosion potential of the metal sample with the coating; B, carrying out a salt fog simulation experiment on the metal sample with the coating and recording the corrosion status of the surface of the coating; C, comprehensively evaluating and analyzing the anti-corrosion performance of the metal sample with the coating according to the step A and the step B. According to the method disclosed by the invention, the metallic equipment with the coating is subjected to electrochemical performance testing of the anti-corrosion performance by adopting potentiodynamic polarization and the electrochemical impedance spectrum, and the corrosion process of the metallic equipment with the coating under the island environment is simulated by adopting a salt fog experiment; a most suitable coating of the metallic equipment under different island environments may be selected according to experiment results of the two steps, thereby providing guarantee for reliable operation of a transformer substation.

Description

technical field [0001] The invention relates to the technical field of laboratory simulation testing, in particular to a testing method for metal anticorrosion performance. Background technique [0002] Metal corrosion is a spontaneous destruction process of metal. Its harm is not only damage to the metal itself, but more importantly, damage to the metal structure and reduce the strength and reliability of metal equipment. Especially in harsh environments such as coastal areas, deserts, and acid rain, the corrosion rate of metals is greatly accelerated. In order to improve the anti-corrosion performance of metals, a layer of metal or alloy is usually plated on the metal surface, or painted on it, so as to achieve anti-corrosion. Metal substrates are electrochemically or coated for protection. [0003] With the development of the power industry, while the work of the power plant is developing, the corrosion problems of some materials, structures and equipment also appear, es...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N17/02
CPCG01N17/006G01N17/02
Inventor 花广如李文浩郭阳阳
Owner NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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