Surface transient temperature inversion for hidden corrosion characterisation

Theory and applications

V. Vavilov, E. Grinzato, P. G. Bison, S. Marinetti, M. J. Bales

Research output: Contribution to journalArticle

56 Citations (Scopus)

Abstract

Corrosion in metals is simulated with variations in plate thickness which are laterally infinite in a 1D model and are represented by milled flat-bottom holes in a 2D model. Temperature contrast over corroded areas is chosen as an informative parameter, quite independent of absorbed thermal energy in the infra-red thermographic test. It is shown that, due to lower sensitivity to rear-side effects at the beginning of the thermal process and increasing 3D heat diffusion effects at the end of the process, there is an optimum time to detect corrosion. A robust inversion function is proposed and its stability against variations in tested material, heat pulse duration and observation time is analysed using numerical modelling. Corrosion in a steel specimen of 1.3 mm thickness is experimentally studied, having proved the validity of the inversion algorithm with an average accuracy of 17% for material loss ranging from 74 to 14%.

Original languageEnglish
Pages (from-to)355-371
Number of pages17
JournalInternational Journal of Heat and Mass Transfer
Volume39
Issue number2
DOIs
Publication statusPublished - Jan 1996

Fingerprint

temperature inversions
corrosion
Corrosion
inversions
heat
Steel
Thermal energy
thermal energy
Temperature
pulse duration
Metals
steels
Infrared radiation
sensitivity
metals
Hot Temperature
temperature

ASJC Scopus subject areas

  • Fluid Flow and Transfer Processes
  • Energy(all)
  • Mechanical Engineering
  • Engineering(all)

Cite this

Surface transient temperature inversion for hidden corrosion characterisation : Theory and applications. / Vavilov, V.; Grinzato, E.; Bison, P. G.; Marinetti, S.; Bales, M. J.

In: International Journal of Heat and Mass Transfer, Vol. 39, No. 2, 01.1996, p. 355-371.

Research output: Contribution to journalArticle

@article{38cf9c2aee524a2ab27c59e5e994c02f,
title = "Surface transient temperature inversion for hidden corrosion characterisation: Theory and applications",
abstract = "Corrosion in metals is simulated with variations in plate thickness which are laterally infinite in a 1D model and are represented by milled flat-bottom holes in a 2D model. Temperature contrast over corroded areas is chosen as an informative parameter, quite independent of absorbed thermal energy in the infra-red thermographic test. It is shown that, due to lower sensitivity to rear-side effects at the beginning of the thermal process and increasing 3D heat diffusion effects at the end of the process, there is an optimum time to detect corrosion. A robust inversion function is proposed and its stability against variations in tested material, heat pulse duration and observation time is analysed using numerical modelling. Corrosion in a steel specimen of 1.3 mm thickness is experimentally studied, having proved the validity of the inversion algorithm with an average accuracy of 17{\%} for material loss ranging from 74 to 14{\%}.",
author = "V. Vavilov and E. Grinzato and Bison, {P. G.} and S. Marinetti and Bales, {M. J.}",
year = "1996",
month = "1",
doi = "10.1016/0017-9310(95)00126-T",
language = "English",
volume = "39",
pages = "355--371",
journal = "International Journal of Heat and Mass Transfer",
issn = "0017-9310",
publisher = "Elsevier Limited",
number = "2",

}

TY - JOUR

T1 - Surface transient temperature inversion for hidden corrosion characterisation

T2 - Theory and applications

AU - Vavilov, V.

AU - Grinzato, E.

AU - Bison, P. G.

AU - Marinetti, S.

AU - Bales, M. J.

PY - 1996/1

Y1 - 1996/1

N2 - Corrosion in metals is simulated with variations in plate thickness which are laterally infinite in a 1D model and are represented by milled flat-bottom holes in a 2D model. Temperature contrast over corroded areas is chosen as an informative parameter, quite independent of absorbed thermal energy in the infra-red thermographic test. It is shown that, due to lower sensitivity to rear-side effects at the beginning of the thermal process and increasing 3D heat diffusion effects at the end of the process, there is an optimum time to detect corrosion. A robust inversion function is proposed and its stability against variations in tested material, heat pulse duration and observation time is analysed using numerical modelling. Corrosion in a steel specimen of 1.3 mm thickness is experimentally studied, having proved the validity of the inversion algorithm with an average accuracy of 17% for material loss ranging from 74 to 14%.

AB - Corrosion in metals is simulated with variations in plate thickness which are laterally infinite in a 1D model and are represented by milled flat-bottom holes in a 2D model. Temperature contrast over corroded areas is chosen as an informative parameter, quite independent of absorbed thermal energy in the infra-red thermographic test. It is shown that, due to lower sensitivity to rear-side effects at the beginning of the thermal process and increasing 3D heat diffusion effects at the end of the process, there is an optimum time to detect corrosion. A robust inversion function is proposed and its stability against variations in tested material, heat pulse duration and observation time is analysed using numerical modelling. Corrosion in a steel specimen of 1.3 mm thickness is experimentally studied, having proved the validity of the inversion algorithm with an average accuracy of 17% for material loss ranging from 74 to 14%.

UR - http://www.scopus.com/inward/record.url?scp=0029657318&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0029657318&partnerID=8YFLogxK

U2 - 10.1016/0017-9310(95)00126-T

DO - 10.1016/0017-9310(95)00126-T

M3 - Article

VL - 39

SP - 355

EP - 371

JO - International Journal of Heat and Mass Transfer

JF - International Journal of Heat and Mass Transfer

SN - 0017-9310

IS - 2

ER -