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Alternating Current Potential Drop Technique to Detect Pit-to-Crack Transition

Published online by Cambridge University Press:  15 April 2016

Xuejun Huang ,
Lun Yu  and
Ronald Ballinger
Xuejun Huang
Affiliation:
H.H. Uhlig Corrosion Laboratory, MIT, MA 02139, U.S.A
Lun Yu
Affiliation:
H.H. Uhlig Corrosion Laboratory, MIT, MA 02139, U.S.A
Ronald Ballinger*
Affiliation:
H.H. Uhlig Corrosion Laboratory, MIT, MA 02139, U.S.A
*
*(Email: hvymet@mit.edu)
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Abstract

Pitting and localized corrosion can occur under various conditions and accelerate the subsequent cracking and the failure of a component. Pit-to-crack transition is considered a critical transition process and has a significant impact on the total lifetime of a component. In this study, an alternating current potential drop (ACPD) system is built and applied the detection of the pit-to-crack transition. The results show that the ACPD system is capable and sensitive to crack initiation and that the sensitivity increased with increased frequency. Crack initiation sites from pits are characterized and discussed.

Keywords

corrosionsteelfatigue

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Type
Articles
Information
MRS Advances , Volume 1 , Issue 17: Mechanical Behaviour and Failure of Materials , 2016 , pp. 1241 - 1246
Copyright
Copyright © Materials Research Society 2016 

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References

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