Combinatorial materials research applied to the development of new surface coatings X: a high-throughput electrochemical impedance spectroscopy method for screening organic coatings for corrosion inhibition.
The objective of the study was to develop a high-throughput electrochemical impedance spectroscopy (HT-EIS) method for rapid and quantitative evaluation of corrosion protective coatings. A 12-element, spatially addressable electrochemical platform was designed, fabricated, and validated. This platform was interfaced to a commercial EIS instrument through an automated electronic switching unit. The HT-EIS system enables four parallel EIS measurements to be run simultaneously, which significantly reduces characterization time compared to that of serial EIS measurements using a multiplexer. The performance of the HT-EIS system was validated using a series of model systems, including a Randles equivalent circuit, an electrochemical reaction (Ti/K4FeCN6, K3FeCN6), a highly uniform polymer film, and several polymer coatings. The results of the validation studies showed that the HT-EIS system enables a major reduction in characterization time and provides high quality data comparable to data obtained with conventional, single-cell EIS measurement systems.
He
Jie
J
Center for Nanoscale Science and Engineering, North Dakota State University, 1805 Research Park Drive, Fargo North Dakota 58102, USA. jie.he@ndsu.edu
Bahr
James
J
Chisholm
Bret J
BJ
Li
Jun
J
Chen
Zhigang
Z
Balbyshev
Séva N
SN
Bonitz
Verena
V
Bierwagen
Gordon P
GP
D001698:Biomedical Engineering / Q000379:methods*; D020099:Coated Materials, Biocompatible / Q000032:analysis / Q000737:chemistry; D003343:Corrosion; D017097:Electric Impedance; D004563:Electrochemistry; D005292:Ferricyanides / Q000737:chemistry; D008422:Materials Testing; D011190:Potassium Cyanide / Q000737:chemistry; D015203:Reproducibility of Results; D013057:Spectrum Analysis / Q000295:instrumentation / Q000379:methods*; D013499:Surface Properties; D014025:Titanium / Q000737:chemistry
D020099:Coated Materials, Biocompatible; D005292:Ferricyanides; D014025:Titanium; D011190:Potassium Cyanide