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Characterization and Quantification of Early Stages for Organic Coatings Applied on AA2024/AA7075 by Correlating Frequency Domain Approach in Real Time

Smith, Austin Gregory
http://rave.ohiolink.edu/etdc/view?acc_num=akron1399125698

Abstract Details

2014, Master of Science in Engineering, University of Akron, Chemical Engineering.
The successful performance of some aircraft structures are dependent on the corrosion control properties. One effective action to control the electrochemical process is to introduce a physical barrier (coating) between the environment and the substrate. Understanding the early stage degradation mechanisms due to environmental surroundings effects during corrosive exposure is a key factor to develop preventive actions and to extend the life and increase the reliability of the structure. Hex chrome-free coatings can be used to control and mitigate potential corrosion risks during operation conditions. This work aims to show the effects of coating based primers (Deft 02-Y-40) versus a pretreatment layer (Alodine 1600) varying corresponding dry film thickness at different pH conditions. Electrochemical Impedance Spectroscopy (EIS) is used to characterize meaningful parameters that quantify the performance for each characteristic during 120 days of exposure. Time domain modeling will support the EIS results (frequency domain) that describe the early stage mechanisms for each layering coating condition and surface analysis, such as Atomic Force Microscopy (AFM) and Infinite Focus Microscopy (IFM) will be used to validate the experimental and theoretical results developed describing the transport mechanisms occurring within the coating during early stages.
Homero Castaneda-Lopez, Dr. (Advisor)
Gang Cheng, Dr. (Committee Member)
Jie Zheng, Dr. (Committee Member)
122 p.
Chemical Engineering; Materials Science
Degradation, early time mechanisms, chrome-free coatings, primers, pretreatments, electrochemical impedance spectroscopy, time domain modeling, equivalent circuits, atomic force microscopy, infinite focus microscopy

Recommended Citations

Citations

  • Smith, A. G. (2014). Characterization and Quantification of Early Stages for Organic Coatings Applied on AA2024/AA7075 by Correlating Frequency Domain Approach in Real Time [Master's thesis, University of Akron]. OhioLINK Electronic Theses and Dissertations Center. http://rave.ohiolink.edu/etdc/view?acc_num=akron1399125698

    APA Style (7th edition)

  • Smith, Austin. Characterization and Quantification of Early Stages for Organic Coatings Applied on AA2024/AA7075 by Correlating Frequency Domain Approach in Real Time . 2014. University of Akron, Master's thesis. OhioLINK Electronic Theses and Dissertations Center, http://rave.ohiolink.edu/etdc/view?acc_num=akron1399125698.

    MLA Style (8th edition)

  • Smith, Austin. "Characterization and Quantification of Early Stages for Organic Coatings Applied on AA2024/AA7075 by Correlating Frequency Domain Approach in Real Time ." Master's thesis, University of Akron, 2014. http://rave.ohiolink.edu/etdc/view?acc_num=akron1399125698

    Chicago Manual of Style (17th edition)

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© 2014, all rights reserved.
This open access ETD is published by University of Akron and OhioLINK.