NDLI: Life Prediction of Thin Organic Films by a Combination of Digital Shearography and Electrochemical Impedance Spectroscopy

Content Provider	Springer Nature Link
Author	Habib, Khaled
Copyright Year	2012
Abstract	A critical (steady state) value of the conductivity of different organic coatings was determined by a combination of digital shearography and electrochemical impedance spectroscopy (EIS). The behavior of organic coatings, i.e., ACE premium-gray enamel, white enamel, beige enamel (spray coatings), a yellow acrylic lacquer, and a gold nail polish on a metallic alloy, i.e., a carbon steel, was investigated over a temperature range of 20–60 °C. The value of the conductivity of coatings was determined by correlating the in-plan displacement of the coating (by shearography over a temperature range 20–60 °C) and the value of the alternating current impedance of the coating by EIS in 3% NaCl solution. The integrity of the coatings with respect to time was assessed by comparing the measured value of conductivity to the critical (steady state) or asymptotic value of conductivity. In other words, by shearography, measurement of coating properties could be performed independent of parameters such as UV exposure, humidity, presence of chemical species, and other parameters which may normally interfere with conventional methods of the assessing of the integrity of coatings. Therefore, one may measure the conductivity of coatings, regardless of the history of the coating, in order to assess the integrity of coatings. Also, the obtained shearography data were found to be in a reasonable trend with the data of EIS in 3% NaCl solution.
Starting Page	80
Ending Page	89
Page Count	10
File Format	PDF
ISSN	15477029
Journal	Journal of Failure Analysis and Prevention
Volume Number	13
Issue Number	1
e-ISSN	18641245
Language	English
Publisher	Springer US
Publisher Date	2012-12-11
Publisher Place	Boston
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Carbon steel Organic coatings Digital shearography EIS Tribology, Corrosion and Coatings Characterization and Evaluation of Materials Mechanics Structural Mechanics Quality Control, Reliability, Safety and Risk
Content Type	Text
Resource Type	Article
Subject	Mechanics of Materials Materials Science Safety, Risk, Reliability and Quality Mechanical Engineering

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