Chemical modification of alkanethiol monolayers for protecting iron against corrosion

Coatings against corrosion and microbial adhesion

“…Amphiphilic molecules with small ionic head group and long hydrophobic chains are suitable for preparation of ultra thin, dense, protective Langmuir-Blodgett (LB), and selfassembled molecular (SAM) layers. Mainly thiol derivatives were used for protection of metals like gold, copper [1][2][3][4][5][6][7][8], and alkanoic acids were applied in case of iron [9][10][11]. The inhibition efficiency of these layers was explained by the blocking effect of the organic films, i.e., the aggressive components of the environment are inhibited from contacting the metal surface.…”

Characterization of n-alkanethiol self-assembled monolayers on mercury by impedance spectroscopy and potentiometric measurements

“…Impedance spectroscopy (IS) is a powerful technique for characterizing thin organic films on different metal surfaces, e.g., Au, Cu, Fe etc. [5][6][7][81][82][83][84][85][86][87][88][89]. These measurements have been widely used to study defect sites, surface coverage and adsorption kinetics of alkanethiols on gold, as well as electron transfer kinetics across a monolayer [5][6][7]81,[85][86][87][88][89].…”

“…These measurements have been widely used to study defect sites, surface coverage and adsorption kinetics of alkanethiols on gold, as well as electron transfer kinetics across a monolayer [5][6][7]81,[85][86][87][88][89]. Furthermore, IS was applied for evaluating the effectiveness of self-assembled layers against corrosion [82][83][84]. However, application of IS for studying the stability, insulating properties and degree of perfection of alkanethiols SAMs on Hg, has been, to the best of our knowledge, limited to a single measurement presented by Demoz and Harrison [67].…”

Molecular layers of hydroxamic acids in copper corrosion inhibition

“…Ultrathin, dense, protective self-assembled (SAM) or LB layers on solid substrates have been studied extensively in the last decades. In the beginning mainly gold, silver and copper, later iron surfaces were modified by different organic molecules like thiol derivatives [35][36][37][38][39][40][41][42], alkanoic acids [43][44][45][46][47][48], alkyl silane derivatives [49][50][51][52] and alkyl thiosulphates [53] and some of these layers were used as metal corrosion inhibitors [54]. The inhibition efficiency of these layers depends on the materials/ molecular structure/head groups/number of monolayers.…”