Inhibition of copper corrosion by self-assembled monolayers of triazole derivative in chloride-containing solution

Adsorption of cobalt (II) 5,10,15,20-tetrakis(2-aminophenyl)-porphyrin onto copper substrates: Characterization and impedance studies for corrosion inhibition

“…The presence of the Warburg impedance in the electrochemical equivalent circuit model is also an indication of the porous nature of the modified surface [24,50]. The slope of the Nyquist plot of the bare copper sample at low frequency is −0.5, which also strongly indicates an infinite diffusion process at the electrode.…”

Comparative anti-corrosion properties of alkylthiols SAMs and mercapto functional silica sol–gel coatings on copper surface in sodium chloride solution

“…Their structures have different alky chain length (here we have three extreme cases: 3, 7 and 11) only allow for van der Waals interactions between the molecules. What is more, the -Si(OMe) 3 group of MPTMS has an extra ability to form Si-O-Si networks on copper surface to further compact the coating. The chemical compositions of as-prepared SAMs and mercapto functional silica sol-gel coatings were characterized by Fourier transform infrared spectroscopy (FTIR) and X-ray photoelectron spectrometer (XPS).…”

“…However, it has been reported that these alkylthiols SAMs go through fast degradation in their protective properties when exposed to aggressive solutions because they only allow for van der Waals interactions between the molecules [6]. Mercapto functional silane is of special structure containing both a mercapto and a hydrolyzable (-Si(OR) 3 ) group. While the mercapto groups form Cu-S bonds, the -Si(OR) 3 groups can form stable Si-O-Si three-dimensional network on copper surface by means of hydrolysis-condensation reaction to form a socalled mercapto functional silica sol-gel coating.…”

“…Copper and copper alloys have extensive applications due to their favorable electric, thermal, mechanical and antimicrobial properties [1]. Despite relatively high level of corrosion potential, they are vulnerable to be corroded when long timely exposed to humid and chlorine-rich environment [2,3]. In order to extend the service life of copper and copper alloys, surface protection is required [4].…”

“…Mercapto functional silane is of special structure containing both a mercapto and a hydrolyzable (-Si(OR) 3 ) group. While the mercapto groups form Cu-S bonds, the -Si(OR) 3 groups can form stable Si-O-Si three-dimensional network on copper surface by means of hydrolysis-condensation reaction to form a socalled mercapto functional silica sol-gel coating. A great many works have been carried out on the formation of alkylthiols SAMs and mercapto functional silica sol-gel coatings on copper surface [7][8][9][10][11][12][13][14][15].…”