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Title: Investigation of corrosion in aluminum/adhesive lap-splices using pulse-echo ultrasonic techniques

Abstract

In this paper we have shown that aluminum skin samples corroded in the laboratory by an electrochemical process are similar to corrosion that occurs naturally. Incorporating the corroded skins into several sets of characterized aluminum/adhesive lap-splices with first and second layer corrosion defects, we have shown qualitative agreement in PP signal amplitude between a low frequency ultrasonic model and experiment. The model suggests, and the experimental evidence agrees, that the trailing signal PP amplitude of a low frequency tri-polar pulse can be used to discriminate metal thinning in the second layer due to corrosion. Further work is in progress to address the issues of frequency selection and errors caused by layer parameter approximation. 6 refs, 7 figs.

Authors:
;
Publication Date:
Research Org.:
Iowa State Univ. of Science and Technology, Ames, IA (United States). Center for Aviation Systems Reliability
Sponsoring Org.:
USDOE, Washington, DC (United States)
OSTI Identifier:
10130950
Report Number(s):
IS-M-740; CONF-920799-5
ON: DE93008074
DOE Contract Number:  
W-7405-ENG-82
Resource Type:
Conference
Resource Relation:
Conference: Review of progress in quantitative nondestructive evaluation (NDE),La Jolla, CA (United States),19-24 Jul 1992; Other Information: PBD: [1992]
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; ALUMINIUM; ELECTROCHEMICAL CORROSION; ULTRASONIC TESTING; LAYERS; ADHESIVES; JOINTS; 360105; CORROSION AND EROSION

Citation Formats

Patton, T C, and Hsu, D K. Investigation of corrosion in aluminum/adhesive lap-splices using pulse-echo ultrasonic techniques. United States: N. p., 1992. Web.
Patton, T C, & Hsu, D K. Investigation of corrosion in aluminum/adhesive lap-splices using pulse-echo ultrasonic techniques. United States.
Patton, T C, and Hsu, D K. 1992. "Investigation of corrosion in aluminum/adhesive lap-splices using pulse-echo ultrasonic techniques". United States.
@article{osti_10130950,
title = {Investigation of corrosion in aluminum/adhesive lap-splices using pulse-echo ultrasonic techniques},
author = {Patton, T C and Hsu, D K},
abstractNote = {In this paper we have shown that aluminum skin samples corroded in the laboratory by an electrochemical process are similar to corrosion that occurs naturally. Incorporating the corroded skins into several sets of characterized aluminum/adhesive lap-splices with first and second layer corrosion defects, we have shown qualitative agreement in PP signal amplitude between a low frequency ultrasonic model and experiment. The model suggests, and the experimental evidence agrees, that the trailing signal PP amplitude of a low frequency tri-polar pulse can be used to discriminate metal thinning in the second layer due to corrosion. Further work is in progress to address the issues of frequency selection and errors caused by layer parameter approximation. 6 refs, 7 figs.},
doi = {},
url = {https://www.osti.gov/biblio/10130950}, journal = {},
number = ,
volume = ,
place = {United States},
year = {Thu Dec 31 00:00:00 EST 1992},
month = {Thu Dec 31 00:00:00 EST 1992}
}

Conference:
Other availability
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