Experimental setup of continuous ultrasonic monitoring for corrosion assessment | IEEE Conference Publication | IEEE Xplore

Experimental setup of continuous ultrasonic monitoring for corrosion assessment


Abstract:

The paper is devoted to the ultrasonic monitoring of accelerated corrosion. In order to achieve non-uniform corrosion (high surface roughness), passivation was applied to...Show More

Abstract:

The paper is devoted to the ultrasonic monitoring of accelerated corrosion. In order to achieve non-uniform corrosion (high surface roughness), passivation was applied to the corroding surface. A dedicated electronic multiplexed four channel front end was developed in order to feed the amplified waveforms from several transducers to the recording instrument. The experiment was conducted using two 5 MHz and two 10 MHz ultrasonic transducers all operating in the pulse echo mode. The transducers were excited in turn using gated bursts, and the received echoes were multiplexed and amplified before being digitized by a high accuracy ultrasonic instrument. Application of adaptive cross correlation to the recorded data allowed continuous thickness estimation of the non-uniformly corroded surface whilst cross correlation method gave unsatisfactory results.
Date of Conference: 06-09 September 2017
Date Added to IEEE Xplore: 02 November 2017
ISBN Information:
Electronic ISSN: 1948-5727
Conference Location: Washington, DC, USA

I. Introduction

In-service continuous ultrasonic thickness monitoring of ship hulls, conducted in the pulse-echo mode from inside the ships, has the potential to reduce maintenance and service costs. This technique can also help to mitigate significant inaccuracy in estimating wall thickness associated with surface corrosion while the ship is in service, provided that the cost of instrumentation and transducers is low enough for their permanent installation in situ, and the recorded echo waveforms can be interpreted online.

References

References is not available for this document.