Another approach in analysis of paint coatings with EIS measurement: Phase angle at high frequencies

Adsorption properties and inhibition of mild steel corrosion in hydrochloric acid solution by ceftobiprole

“…Phase angle at high frequencies provides a general idea of anticorrosion performance. The more negative the phase angle the more capacitive the electrochemical behaviour [46]. Depression of phase angle at relaxation frequency occurs with decreasing ceftobiprole concentration which indicated the decrease of capacitive response with the decrease of inhibitor concentration (Fig.…”

Electrical impedance spectroscopy (EIS) for biological analysis and food characterization: a review

“…For this reason, many authors have investigated the possibility to use only raw impedance data. Mahdavian and Attar (2006) found that the phase angle at 10 kHz can be used to estimate coating resistance and capacitance; Zuo et al (2008) extended the investigations of Mahadavian and Attar and discussed how the phase angle measured at 10 Hz is correlated with the coating resistance, while the value measured at 15 kHz can be used to detect the loss of coating protection; Akbarinezhad et al (2009) suggested that the area under the Bode plot for |Z| and Arg(Z) provides a parameter for ranking the performance of organic coating; Zhang et al (2005) discussed how the breakpoint frequency (i.e., that at which the phase angle equals 45 • ) is proportional to the delaminated area and inversely proportional to coating resistivity and permittivity; Zhao et al (2007) used the changing rate of impedance in conjunction with the self-organizing feature map network for the analysis of the coating deterioration process. An handheld system for in situ corrosion monitoring, based on the microcontroller MSP430F149 and capable of measuring impedances in the range 1 k -10 G was built by Angelini et al (2006).…”

EIS and ENM as tools to evaluate inhibitive performance of second generation of phosphate-based anticorrosion pigments

“…The tendency of AC current to pass through the resistor in the circuit leads to a drop in the phase angle. Hence, the system exhibiting higher resistance can be characterized by higher phase angle [29]. Accordingly, phase angle values (h) of 4.32 and 19.82 at 10 kHz for the samples exposed to ZP and ZPA extracts, respectively, may reflect enhanced inhibitive characteristics of ZPA.…”