Inhibition of copper corrosion in 3.5% NaCl solutions by a new pyrimidine derivative: electrochemical and computer simulation techniques

Experimental and quantum chemical studies of synthesized triazine derivatives as an efficient corrosion inhibitor for N80 steel in acidic medium

“…It is further evident in Table 1 that both inhibitors are good inhibitors even at concentrations as low as 20 ppm. The inhibition efficiency of APTT and MITT at a higher concentration (150 ppm) was found to be 94.1% and 92.1%, respectively, while lower concentration (20 ppm) was 77.2% and 75.0%, respectively at 303 K. The corrosion inhibition efficiency offered by APTT and MITT at lower (20 ppm) as well as higher (150 ppm) concentrations was found to be better as compared to the inhibition efficiency of most of the pyridine derivatives reported in literature [23][24][25][26][27]. The increase in inhibition efficiency with increasing concentrations of inhibitor was due to the increase in the surface coverage, resulting in retardation of metal dissolution [32,33].…”

“…Some derivatives of triazine [18][19][20], isoxazole [21,22] and pyrimidine [23][24][25][26][27] have been reported as excellent inhibitors for metals and alloys in hydrochloric acid solution, and exhibit different inhibition efficiency as a result difference in substituent groups and substituent positions on the aromatic rings. To the best of our knowledge, screened literature shows that the structural parameters, effect of temperature and corrosion inhibition of the studied compounds in the present work have not been reported.…”

Influence of Ultrasonic Excitation Sealing on the Corrosion Resistance of HVOF-Sprayed Nanostructured WC-CoCr Coatings under Different Corrosive Environments

“…According to the characteristics of Nyquist plots of the unsealed coating in both 3.5 wt % NaCl and 1 mol•L −1 HCl solutions and the sealed coating in 3.5 wt % NaCl solution, the equivalent circuit with two time constants (Figure 6a) is used to fit the EIS data, where R s , R p , R ct , Q c , and Q dl represent the resistance of electrolyte solution, the resistance of pores, the resistance of charge transfer, the capacitance of the coating, and the capacitance of the double layer, respectively. The constant phase element (CPE or Q) instead of the capacitance is related to the nonuniformity of surface and diffusion factors [35], which can be described as Z Q = Y 0 −1 (jω) −n (0 < n < 1). As for sealed coating in 1 mol•L −1 HCl solution, an additional element, Warburg impedance (Z w ), appears in the equivalent circuit as presented in Figure 6b, which corresponds to the accumulation of corrosive products in pores and the diffusion-controlled mechanism [36,37].…”

Corrosion Inhibition of Carbon Steel in 0.5 M H2SO4by Phtalocyanine Blue

“…Organic compounds containing atoms such as nitrogen, sulphur, and oxygen are commonly used to reduce the corrosion attack on steel in acidic media. These compounds adsorb on the metal surface, block the active sites on the surface, and thereby reduce the corrosion process [1][2][3][4][5][6]. The inhibiting action of such compounds is based on the adsorption ability of their molecules, where the resulting adsorption film isolates the metal from the aggressive media.…”