Study on corrosion inhibition efficiency of some quinazoline derivatives on stainless steel 304 in hydrochloric acid solutions

Abstract

The effect of the addition of some quinazoline derivatives on the corrosion of stainless steel 304 (SS 304) in hydrochloric acid medium was investigated using electrochemical frequency modulation (EFM), electrochemical impedance spectroscopy (EIS), potentiodynamic polarization, and weight reduction measurements, The inhibition efficiency increases with increasing the inhibitor concentration, but decreases with increasing the temperature. The adsorption of these compounds on the stainless steel 304 surface follows Langmuir isotherm. Potentiodynamic polarization studies showed that these compounds are mixed-type inhibitors. The results obtained from all the measurements are in good agreement. The effect of temperature in the range 298-328 K on the corrosion of stainless steel 304 in 1 M HCl was tested and thermodynamic parameters were computed and discussed.

Electrochemical studies on the corrosion resistance of 18 K gold in artificial saliva, in the absence and presence of Gemer-2 tablet (orally taken by type 2 diabetes)

“…Electrochemical studies are used to measure the corrosion resistance of metals and alloys in various media. [12][13][14][15][16][17][18][19][20][21][22][23][24][25][26][27] The corrosion resistance of 18K gold in aritificial saliva, in the absenc and presence of Gemer-2 has been evaluated by electrochemical studies such as polarization study and AC impedance spectra.…”

Influence of some tablets on corrosion resistance of orthodontic wire made of SS 316L alloy in artificial saliva

“…The AC impedance spectra of SS 316L alloy immersed in Artificial Saliva (AS) in the absence and presence of five tablets obtained from AC impedance spectra are shown in Figures 4, 5. The AC impedance parameters namely charge transfer resistance (R t ) and double layer capacitance (C dl ) derived from Nyquist plots ( Figure 4) and Bode plots ( Figure 5) are also given in this Table 3 [17][18][19][20][21]. In the Nyquist plot the extreme point in the high frequency region corresponds to R s (solution resistance).…”

The inhibition effect of o-nitrophenol and Zn2+ system on corrosion of aluminium

“…If a protective film forms on the metal surface, the linear polarization resistance value (LPR) will increase and corrosion current value (I corr ) decrease [10][11][12][13][14]. Monitoring of LPR [15] is a rapid method of measuring corrosion rate.…”