The synthesis and characterization of benzotriazole-based cationic surfactants and the evaluation of their corrosion inhibition efficiency on copper in seawater

Abstract

Three cationic surfactants based on benzotriazole were prepared and their efficiencies as corrosion inhibitors for copper electrodes in seawater were evaluated using different electrochemical techniques (polarization methods, EIS techniques and atomic force microscopy).

Electrochemical Quantification of Corrosion Mitigation on Iron Surfaces with Gallium(III) and Zinc(II) Metallosurfactants

“…The variability of the cathodic and anodic slopes (β c and β a ) with the presence of molecular films implies that oxygen reduction and metal dissolution were affected without modifying the mechanism of corrosion. 43 Substrates with deposited films also showed more positive corrosion potentials of −468 mV Ag/AgCl and −438 mV Ag/AgCl for 1 and 2 than for bare iron substrates (−542 mV Ag/AgCl ), further confirming the inhibition efficiency of both metallosurfactants. 44 Similar results were found for corrosion tests in acid.…”

“…Inhibition efficiencies (IE imp %) from charge transfer resistance (R ct ) was calculated using eq 6. 26,43,45…”

“…Charge transfer resistance ( R ct ) values were obtained by fitting the data to an equivalent circuit (Figure S6, Table S1). Inhibition efficiencies (IE imp %) from charge transfer resistance ( R ct ) was calculated using eq . ,, where R‘ ct and R ct are the charge transfer resistance of the LB-film coated substrate and the bare substrate, respectively. In 3.5% NaCl, iron substrates coated with 1 and 2 showed a notably higher R ct than the observed for the bare substrate (825.7 and 802.8 Ω·cm 2 vs 703.0 Ω·cm 2 , respectively).…”

Synthesis and Characterization of Imidazole Based Cationic Surfactants as Disinfectants

“…They also find their applications in textile and mineral processing [9][10][11] , polymerization of emulsions, and curbing corrosion 7,8 . The biological application of these surface-active agents includes antimicrobial activity and their specific role in drugs and gene delivery agents [12][13][14][15] . Every year, an increase in annual growth rate by 3-4% has been reported for the use of surfactants in the industry.…”

“…There are still certain issues which need to be resolved. These include ease of manufacturing, cost, and related environmental issues 14,15 . Recent report shows the synthesis of new cationic surfactants based on oleic and stearic acid.…”