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On-line monitoring method for failure state of metal and protection layer inter face

A technology of failure state and protective layer, applied in measuring devices, instruments, material analysis by electromagnetic means, etc., can solve the problems of lack of metal substrate and protective layer interface state change trend non-destructive, direct, advanced prediction, etc., to achieve advanced corrosion Monitoring performance, high sensitivity, predicting the effect of coating life

Inactive Publication Date: 2005-08-24
SHAOGUAN COLLEGE
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Problems solved by technology

[0014] In order to overcome the disadvantages of indirect measurement and lack of non-destructive, direct, and advanced prediction of the state change trend of the metal substrate and protective layer interface in the mechanical device, the present invention provides a mechanical device that can be used for online monitoring of corrosive environments. On-line monitoring method of metal and protective layer interface failure state

Method used

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  • On-line monitoring method for failure state of metal and protection layer inter face
  • On-line monitoring method for failure state of metal and protection layer inter face

Examples

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example 1

[0032]Example 1, a method for on-line corrosion monitoring of metal and protective layer interface failure, in the corrosion-sensitive part of the metal substrate of the mechanical equipment designed or manufactured, the probe for monitoring the state change of the interface is prefabricated, and the probe is used from the metal substrate of the equipment. The same material directly cut from the corrosion-sensitive part is processed into a probe and then inserted into the metal base of the mechanical equipment in situ. The probe and the metal base of the equipment are integrated and undergo the subsequent preparation and processing of the surface protection layer. The state of the interface between the probe and the protective layer is completely consistent with the state of the interface between the metal substrate and the protective layer of the mechanical equipment, so that the surface of the probe and the surface of the metal substrate of the device have exactly the same sta...

example 2

[0044] Example 2: A method for on-line monitoring of metal corrosion, in the same metal equipment design and manufacturing process as in Example 1, the structure of the probe is changed, figure 2 It is a structural schematic diagram of the probe in Example 2 of the present invention. The research electrode (1) and the reference electrode (2) are embedded into the metal device body at one time as a whole. If the protective coating (5) is organic, the collected information may include the coating's water absorption rate, porosity, and the rate of change and magnitude of the bonding force at the interface between the metal and the coating.

[0045] If the protective coating (5) is a thermally sprayed metallic material, the change in the state of adhesion between the metal substrate and the coating can be evaluated from the measured information.

[0046] The working environment of metal machinery can be a liquid strong corrosive medium, such as sea water, or the equipment in the...

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Abstract

This invention relates to the metal and the protector contact surface mode of failure on-line monitor method, in the design or the manufacture mechanical device metal base corrosion sensitive spot, prefabricated monitor contact surface corrosion change poking head in, uses the same material which cuts directly down from the equipment home position is the main body, after processes probe in to inlay the mechanical device metal base again the home position, probe in with the equipment metal base is the integrated union, states probe in to pass through the equipment wall, its rear part reserves in hardware exterior has the connecting lead the receptacle, when needs to gather the contact surface information, Will state the receptacle and the electrochemistry workstation with the wire and so on can gather electrochemistry data the and so on impedance spectrum monitor terminal device connects, and will use the CR transmission line model analysis electrochemistry impedance spectrum. The monitor can obtain in advance information, the monitor result analysis has the versatility, the uniformity and the objectivity: Increased the result reliable degree.

Description

【Technical field】 [0001] The present invention relates to a method for on-line monitoring of the failure state of the metal-protective layer interface, in particular to a method for on-line monitoring of the state change of the metal-protective layer interface with integrated application, same state, and built-in probes for collecting electrochemical information such as impedance spectra method. 【Background technique】 [0002] Explanation of terms: The CR transmission line model refers specifically to a transmission line type equivalent circuit model that only includes capacitance C and resistance R. [0003] The losses caused by corrosion of industrial equipment are staggering. According to the survey, the global annual corrosion loss is about 700 billion US dollars, accounting for about 2% to 4% of the GNP of various countries. According to the statistics of Battele Laboratory, the annual corrosion loss of the United States is about 300 billion US dollars, of which the lo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N17/02G01N27/00G01N27/02
Inventor 孙秋霞
Owner SHAOGUAN COLLEGE
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