Spectro-electrochemical studies of the corrosion inhibition of copper by mercaptobenzothiazole

SVET study of the interaction of 2-mercaptobenzothiazole corrosion inhibitor with Au, Cu and Au–Cu galvanic pair

“…It has been reported in the literature that a film of 2MBT can be adsorbed on copper corrosion layers (Cu 2 O and CuO) [42]. So, the sudden drop of electrochemical activity observed over Cu, could be due to 2MBT molecules being desorbed and resuming their tautomeric equilibrium in a very similar fashion to what is observed in the case of Au treated with 2MBT.…”

“…Namely, in the case of Au-Cu the shift was FCP = -22.4 mV, for the Au specimen was FCP = -57.7 mV, and for Cu was FCP = -131 mV. It is interesting to observe that the biggest change in FCP has occurred for copper, though 2MBT is considered to be a good corrosion inhibitor for copper [5,25,26,42], and we would expect a shift toward more positive FCP values in 2MBT treated Cu.…”

“…Though the gold wire is located approximately at the center of the scanned area, its actual shape is not distinguishable from the surrounding epoxy resin, a fact that can be attributed to the low reactivity of gold in 1 mM NaCl solution. Given that 2MBT is a tautomer, the observation of a positive ionic current in the system must be attributed to the deprotonation of 2MBT molecule [42] during its tautomeric equilibrium. Furthermore, the possible formation of a multilayer structure on gold during the pretreatment step in 2MBT solution, would lead to greater instability in the outermost molecules adsorbed on gold when the organic compound is not present in the test solution.…”

Electrochemical and XPS study of 2-merсaptobenzothiazole nanolayers on zinc and copper surface

“…It is also known as an accelerator for rubber vulcanization [8], antioxidant [9] and antiseptic [10]. Anticorrosive application of MBT and its derivatives was studied for copper and copper alloys [11][12][13][14][15][16][17][18][19][20][21], zinc and silver [19,22]. According to [23], MBT can be a good inhibitor for mild steel in a wide range of phosphoric acid concentrations.…”

Inhibition Effect of 1-Butyl-4-Methylpyridinium Tetrafluoroborate on the Corrosion of Copper in Phosphate Solutions

“…Some heterocyclic compounds containing a mercapto group have been developed as copper corrosion inhibitors. These compounds include: 2-mercaptobenzothiazole [22], 2,4-dimercaptopyrimidine [23], 2-amino-5-mercaptothiadzole, 2-mercaptothiazoline [24], potassium ethyl xanthate [25][26][27][28] and indole and derivatives [29]. Among the numerous organic compounds tested and industrially applied as corrosion inhibitors, nontoxic ones are far more strategic now than in the recent past.…”