Expired Podocip drug as potential corrosion inhibitor for carbon steel in acid chloride solution

Abstract

The application of expired drugs as corrosion inhibitors provides a cost effective and environmentally benign alternative to otherwise tedious and costly disposal/degradation process. In this context, we have investigated the use of expired Podocip (PCIP) drug as corrosion inhibitor for carbon steel in 1 M HCl by weight loss and electrochemical methods. Polarization curves revealed that the inhibiting action of the PCIP is mixed-type. The adsorption of PCIP on carbon steel surface obeys the Langmuir isotherm. Impedance analysis showed that the presence of inhibitor considerably affects the charge transfer resistance and the double layer capacitance of carbon steel surface. SEM and AFM studies evidenced the formation of a protective film over metal surface.

Use of Cedrela odorata Linnaeus Exudate for Inhibiting Corrosion by Chlorides in Reinforced Concrete

“…For a corrosion inhibitor to be considered efficient, the change in the e corr value must range between < 85 mV and > 85 mV and represents either a mixed-type inhibitor or an anodic/cathodic-type inhibitor, respectively [49]. In the present study, the maximum changes in the e corr value are 242 mV for 0.5 % exudate and 320 mV for 0.9 %, proving that the cedar extract molecule behaves as an anodic/cathodic-type inhibitor; therefore, it can be said that the anodic and cathodic reactions that do not vary due to active metallic sites are unblocked [50].…”

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.…”

Inhibitive effect of Thymus satureioides essential oil as a green corrosion inhibitor for mild steel in an acidic medium

“…However, these techniques are often unsuitable when the metal is exposed to a corrosive medium for a long time. Therefore, the use of corrosion inhibitors is one of the most common methods applied for protecting metal or alloy surfaces in acidic environment [9][10][11][12][13][14].…”