Within an M-ERA.NET project named B-IMPACT, some polydentate Schiff bases were synthetized and studied as corrosion inhibitors for a copper alloy, reproducing the composition and microstructure of a Renaissance bronze. The aggressive environment consisted in a concentrated artificial acidic rain (ARX10) solution. In all cases, the substances were tested under saturated conditions (<10-3 M). Excellent inhibiting properties were exhibited by 2-(salicylideneimino)thiophenol (SITP) and good results were obtained with 2-(2-thiophenyl)imino-1,2-diphenylethanone (TPIE) and 2-(3-methoxy-salicylideneimino)thiophenol (MSITP) during 20 days of immersion, as evidenced by electrochemical impedance spectroscopy (EIS) monitoring. Surface analyses, such as Scanning Electron Microscope (SEM) observations, Raman and X-Ray Photoelectron Spectroscopy (XPS), were also performed to clarify the inhibition mechanism of the most effective substance.
Inhibiting effects of some Schiff bases on the corrosion of bronze exposed to artificial acidic rain
MONTICELLI, Cecilia;BALBO, Andrea;ZANOTTO, Federica;MARVELLI, Lorenza;
2016
Abstract
Within an M-ERA.NET project named B-IMPACT, some polydentate Schiff bases were synthetized and studied as corrosion inhibitors for a copper alloy, reproducing the composition and microstructure of a Renaissance bronze. The aggressive environment consisted in a concentrated artificial acidic rain (ARX10) solution. In all cases, the substances were tested under saturated conditions (<10-3 M). Excellent inhibiting properties were exhibited by 2-(salicylideneimino)thiophenol (SITP) and good results were obtained with 2-(2-thiophenyl)imino-1,2-diphenylethanone (TPIE) and 2-(3-methoxy-salicylideneimino)thiophenol (MSITP) during 20 days of immersion, as evidenced by electrochemical impedance spectroscopy (EIS) monitoring. Surface analyses, such as Scanning Electron Microscope (SEM) observations, Raman and X-Ray Photoelectron Spectroscopy (XPS), were also performed to clarify the inhibition mechanism of the most effective substance.I documenti in SFERA sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
