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Electrochemical Identification and Categorization of the Protective Quality of Intact and Damaged Coatings
Author(s) -
Hosbein Kathryn N.,
Swartz Natasja A.,
Clare Tami Lasseter
Publication year - 2014
Publication title -
electroanalysis
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.574
H-Index - 128
eISSN - 1521-4109
pISSN - 1040-0397
DOI - 10.1002/elan.201400253
Subject(s) - coating , categorization , dielectric spectroscopy , identification (biology) , equivalent circuit , electrochemistry , electrical impedance , biological system , materials science , quality (philosophy) , computer science , nanotechnology , chemistry , artificial intelligence , engineering , physics , voltage , electrical engineering , botany , electrode , quantum mechanics , biology
Defective polymeric coatings that are particularly relevant in the conservation of outdoor metalwork, are analyzed using electrochemical impedance spectroscopy (EIS), validated by KramersKronig transformations, and modeled using electrical equivalent circuit models (EECs). Using twenty different coated panels of five different coating types, ten mathematical methods for categorizing the protective qualities of coatings are explored as simpler and faster alternatives to circuit modeling; three methods gave a perfect correlation with the category determined by circuit modeling. Our findings highlight the need for fitting data to EECs before relying upon purely mathematical parameters for evaluating protective coating quality.