High-accuracy ultrasonic corrosion rate monitoring

Fangxin Zou, Frederic B. Cegla

Research output: Journal article publicationJournal articleAcademic researchpeer-review

3 Citations (Scopus)

Abstract

Corrosion is one of the most pervasive degradation mechanisms of engineering infrastructure. In the petroleum industry, it is particularly challenging because crude oils contain a large amount of corrosive substances. Ultrasonic testing with permanently installed transducers is widely used for online corrosion monitoring in the field. A carefully optimized ultrasonic corrosion monitoring technique for performing measurements in the laboratory is presented. It is shown that for thickness measurements of a 10 mm steel component, a repeatability of approximately 40 nm can be maintained over the period of a day. All ultrasonic wall loss measurements reported have been validated by optical surface profile scans and, where possible, by analytical predictions based on Faraday’s law. Further analysis of the results showed that wall loss rates of the order of 0.1 mm/y to 0.2 mm/y can be detected within 1 hr to 2 hr. This state-of-the-art laboratory technique is highly accurate and responsive, and possesses the potential for becoming a powerful alternative corrosion assessment tool that is convenient to use.

Original languageEnglish
Pages (from-to)372-382
Number of pages11
JournalCorrosion
Volume74
Issue number3
DOIs
Publication statusPublished - 2018
Externally publishedYes

Keywords

  • Corrosion monitoring
  • Corrosion rate
  • Nondestructive testing
  • Piezoelectric transducer
  • Structural health monitoring
  • Ultrasonic testing

ASJC Scopus subject areas

  • Chemistry(all)
  • Chemical Engineering(all)
  • Materials Science(all)

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