Electrochemical Impedance for Degraded Coated Steel Having Pores

Electrochemical and Quantum Chemical Studies of 1, 2, 3-Benzotriazole as Inhibitor for Copper and Steel in Simulated Tap Water

“…It may be due to the insuf cient inhibition of the BTAH on the steel surface. The insuf cient inhibition formed the defect such as pore in the physical barrier, so the metal substrate can be exposed to the corrosion 23) . It was therefore applied two-time equivalent circuit as shown in Fig.…”

Sol–Gel Protective Coatings for Metals

“…The electrochemical impedance spectroscopy (EIS) was revealed as one of the most useful and reliable techniques for investigating coating degradation (Hirayama 1991;Hack 1991).…”

Evaluation of blistering performance of pigmented and unpigmented alkyd coatings using electrochemical impedance spectroscopy

“…The representation of interfacial more reliable curves. Though, the design of the cell enabled evaluation of the same location of the sample impedance, Z i , has many variations [2,3], the simplest of which, as indicated in Fig. 2(a), involves as its paramfor EIS analysis, to continuously monitor the changes in the coating, experiments were conducted in triplicate and mean value of these three data was used for analysis.…”

“…The Fig. 2(a) [1][2][3]. The parameters, coating capacitance (C c ) and pore resistance (R po ), represent the basic properamplitude of the signal used was ±5 mV.…”

“…When the blisters formed, the Nyquist plots clearly reflected the presence of Warburg impedance and the Z∞ value at the intersection of the Z∞-axis of the high frequency capacitive loop obtained by manual extrapolation gave R po . Following the earlier work [3,5,6 ], the parameter break point frequency, f 45 was determined as the frequency corresponding to a phase angle (w) of 45°on the descending side of high frequency phase angle plot. These values were further verified using C c and R po by means of the following equation, which correlates f 45 to C c and R po [7] …”