A study on the monitoring method of uniform corrosion of a stainless steel plate based on electromechanical impedance technique

LIU Yang1,FENG Xin1,2,3

Journal of Vibration and Shock ›› 2020, Vol. 39 ›› Issue (12) : 9-16.

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PDF(2130 KB)
Journal of Vibration and Shock ›› 2020, Vol. 39 ›› Issue (12) : 9-16.

A study on the monitoring method of uniform corrosion of a stainless steel plate based on electromechanical impedance technique

  • LIU Yang1,FENG Xin1,2,3
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Abstract

The thinning of the thickness of stainless steel plate is one of the main reasons for the degradation of the integrity and applicability of stainless steel plate.The uniform corrosion of stainless steel plate can result in uniform thickness reduction and mass loss of stainless steel plate.Therefore,it is of great significance to effectively monitor the uniform corrosion of stainless steel plate.However, the effective monitoring of uniform corrosion of stainless steel plate is full of difficulties and challenges.A monitoring method for uniform corrosion of stainless steel plate based on electromechanical impedance technique was presented.Through deducing the effective mechanical admittance of the simply supported thin stainless steel plate under the excitation of a single surface-bonded piezoelectric transducer,the resonance frequency shift of the bending vibration mode in the admittance curve was proposed as a sensitive index for evaluating the uniform corrosion damage of stainless steel plate,the quantitative relationship between and the actual corrosion degree was used to quantify and predict the uniform corrosion degree of stainless steel plate.The effectiveness and reliability of the proposed method were proved by experiment.

Key words

electromechanical impedance technique / stainless steel plate / uniform corrosion / resonance frequency shift

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LIU Yang1,FENG Xin1,2,3. A study on the monitoring method of uniform corrosion of a stainless steel plate based on electromechanical impedance technique[J]. Journal of Vibration and Shock, 2020, 39(12): 9-16

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