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Sensor and detection method for atmosphere corrosion detection of steel member or test piece

A technology for steel components, corrosion detection, used in weather resistance/light resistance/corrosion resistance, instruments, measuring devices, etc., and can solve problems such as corrosion of electrochemical sensors

Inactive Publication Date: 2016-03-23
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the design of corrosion electrochemical sensors and the use of electrochemical noise technology for on-site corrosion monitoring of steel components (or test pieces) have not been reported yet.

Method used

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  • Sensor and detection method for atmosphere corrosion detection of steel member or test piece

Examples

Experimental program
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Effect test

example 1

[0017] Example 1. Corrosion monitoring of iron and steel components in marine and atmospheric environments: the reference electrode 2 is a high-purity zinc electrode, and the counter electrode 1 is a platinum-plated titanium electrode. Place a piece of plastic mesh 3 with a thickness of about 500 microns and a diameter of about 2 cm on the surface of the steel member (or test piece) to be tested. Place the sensor and press the plastic net 3, and the sensor is adsorbed on the steel sample to be tested by the magnet 4. Adjust the positions of the reference electrode 2 and the counter electrode 1 until the two electrodes press against the plastic mesh 3 . The working electrode electrical contact lead wire 5 is placed near the sensor, the copper wire in the lead wire 5 communicates with the steel surface to be tested, and the outer magnet 4 is adsorbed on the surface of the steel component (or test piece) to be tested. The electrochemical noise test is carried out by using a dete...

example 2

[0018] Example 2. Corrosion monitoring of iron and steel components in an urban atmospheric environment: The difference from Example 2 is that the reference electrode 2 is a high-purity antimony electrode, and the counter electrode 1 is a platinum-plated titanium electrode.

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Abstract

The invention relates to a sensor for atmosphere corrosion detection of a steel member or a test piece. The sensor comprises a supporting column for supporting the sensor, a reference electrode (2), a counter electrode (1), a working electrode electric contact lead wire (5) which is in direct contact with the surface of the steel member or test piece to be detected, a plastic net (3) and a magnet (4), and is characterized in that the magnet (4) is fixed at the lower end of the supporting column; and the lower ends of the reference electrode (2) and the reference electrode (2) are separated from the surface of the steel member or test piece to be detected through the plastic net (3). The invention also provides a method for detecting the atmosphere corrosion detection of the steel member or the test piece by adopting the sensor. With the adoption of the sensor and the method, the on-site corrosion detection of the large-size steel member or test piece can be realized in real time; and an adopted electrochemical noise technology has no interferences on a detected system and belongs to nondestructive testing.

Description

technical field [0001] The invention relates to an atmospheric corrosion electrochemical noise detection sensor suitable for iron and steel components (or test pieces), belonging to the field of corrosion electrochemistry. Background technique [0002] How to evaluate the atmospheric corrosion performance of iron and steel materials has important guiding significance for the reasonable selection of iron and steel materials and the evaluation of the service life of components. Although the traditional weight loss test method can evaluate the atmospheric corrosion resistance of steel materials, it cannot realize real-time measurement of atmospheric corrosion, and it is time-consuming. Since the essence of atmospheric corrosion is electrochemical corrosion under a thin liquid film, electrochemical technology is the most effective means to evaluate the corrosion resistance of steel materials and study the corrosion mechanism. In recent years, the electrochemical noise technique...

Claims

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Application Information

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IPC IPC(8): G01N17/02
Inventor 夏大海宋诗哲李健姜国兴常安乐黑梅
Owner TIANJIN UNIV
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