Acoustic Emission Method for Monitoring Corrosion Reactions

Abstract There is a continuing need for new test techniques to follow corrosion reaction processes and to predict long-term materials performance in aggressive environments. Additionally, there is a growing awareness of the importance of applying non-destructive inspection to determine the presence of corrosion in non-visible areas of equipment and structures. The possibilities of utilizing acoustic emission for a broad range of applications in the study of these problems were explored. Proprietary methods were developed to follow corrosion reactions and to monitor corrosion of simulated and actual structures. These experiments point out the applicability of acoustic emission as a sensitive new tool for corrosion research and non-destructive testing (NDT) in corrosion prone structures and equipment.

Download Full-text

Nondestructive Testing and Structural Condition Monitoring of Mechanical Cables

Applied Mechanics Reviews ◽

10.1115/1.3120320 ◽

1993 ◽

Vol 46 (4) ◽

pp. 133-138 ◽

Cited By ~ 6

Author(s):

Patricio A. A. Laura

Keyword(s):

Acoustic Emission ◽

Nondestructive Testing ◽

Condition Monitoring ◽

Structural Condition ◽

Non Destructive Testing ◽

Acoustic Emission Method ◽

Testing Methods ◽

Emission Method ◽

Destructive Testing ◽

Non Destructive

This article concerns the problem of evaluating the `structural health’ of cables or ropes by means of non-destructive testing methods. Special emphasis is placed upon electromagnetic techniques and the acoustic emission method.

Download Full-text

Features of Noise Filtering During Acoustic Emission Testing

International Journal of Innovative Technology and Exploring Engineering - Special Issue ◽

10.35940/ijitee.a5067.119119 ◽

2019 ◽

Vol 9 (1) ◽

pp. 3977-3980

Keyword(s):

Acoustic Emission ◽

Acoustic Noise ◽

Low Noise ◽

Non Destructive Testing ◽

Acoustic Emission Method ◽

Emission Method ◽

Destructive Testing ◽

Emission Testing ◽

Acoustic Emission Testing ◽

Non Destructive

This article discusses the problems of the acoustic emission method of non-destructive testing. An approach to filtering noise arising from monitoring of acoustic emission is considered. The filtering of acoustic noise is one of the key problems of the acoustic emission method, since the low noise immunity of the acoustic emission method prevents the expansion of its industrial application. The complexity of the filtering is explained by the fact that the waveform and spectrum of acoustic emission pulses change depending on the distance between the defect, which is the source of acoustic emission waves, and the sensor. In turn, the interference, as a rule, is non-stationary in nature and is determined by the type of technological process of the tested composition. This article discusses various types of noise processes, both stationary and non-stationary. The signal and noise parameters are compared, based on which recommendations are given for constructing algorithms for detecting acoustic emission pulses against a background of noise.

Download Full-text

Fatigue Crack Propagation Monitoring by Acoustic Emission Signal Analysis

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.465.370 ◽

2011 ◽

Vol 465 ◽

pp. 370-373 ◽

Cited By ~ 1

Author(s):

Paola Antonaci ◽

Pietro G. Bocca ◽

Davide Masera

Keyword(s):

Acoustic Emission ◽

Signal Analysis ◽

Mechanical Response ◽

Non Destructive Testing ◽

Destructive Testing ◽

Testing Laboratory ◽

Cyclic Action ◽

Emission Signal ◽

Non Destructive

The aim of this work is to analyse the mechanical response of the masonry specimens under long-term action by means of cyclic tests. To this end laboratory tests were carried out at the Non-Destructive Testing Laboratory of the Politecnico di Torino. The Acoustic Emission technique was employed to assess the damage evolution, and the mechanical properties decay in order to evaluate the extent and the evolution of micro and macro-cracking due to cyclic action until structural collapse in masonry blocks and mortar layers.

Download Full-text