Pyrimidine and thiadiazole derivatives have been evaluated as prefilming agents and corrosion inhibitors of OFHC copper, Al-brass, 90Cu-10Ni and 70Cu-30Ni, in sodium chloride solutions. Two series of compounds have been tested: - 2-mercaptopyrimidine, 2,4-dimercaptopyrimidine, 2-mercapto,4hydroxypyrimidine, 2-mercapto,4aminopyrimidine; - 2-amino,1,3,4-thiadiazole, 2-amino,5mercapto,1,3,4-thiadiazole, 2,5-dimercapto,1,3,4-thiadiazole, 2-amino,5/ethylthio)1,3,4-thiadiazole. The elctrodes have been prefilmed by immersion in aqueous solutions of the various compounds (conc. 2x10-4M; T=80°C; t=60 min). In some cases the influence of the variation of the prefilming parameters have been evaluated. The inhibiting effect of the various additives has been studied using 1x10-3M solutions. The protective effects due to the prefilming treatments or to the presence of the additives in chloride solutions have been evaluated by recording the anodic and cathodic polarization curves and the polarization resistance values during 300-hour immersion tests in non deareated 0.1M NaCl solutions at 40°C. The nalysis of the obtained results allowed to differentiate the protectivity of the various compounds.

Pyrimidine and thiadiazole derivatives as inhibitors of copper corrosion in sodium chloride solution

ZUCCHI, Fabrizio;TRABANELLI, Giordano;
1995

Abstract

Pyrimidine and thiadiazole derivatives have been evaluated as prefilming agents and corrosion inhibitors of OFHC copper, Al-brass, 90Cu-10Ni and 70Cu-30Ni, in sodium chloride solutions. Two series of compounds have been tested: - 2-mercaptopyrimidine, 2,4-dimercaptopyrimidine, 2-mercapto,4hydroxypyrimidine, 2-mercapto,4aminopyrimidine; - 2-amino,1,3,4-thiadiazole, 2-amino,5mercapto,1,3,4-thiadiazole, 2,5-dimercapto,1,3,4-thiadiazole, 2-amino,5/ethylthio)1,3,4-thiadiazole. The elctrodes have been prefilmed by immersion in aqueous solutions of the various compounds (conc. 2x10-4M; T=80°C; t=60 min). In some cases the influence of the variation of the prefilming parameters have been evaluated. The inhibiting effect of the various additives has been studied using 1x10-3M solutions. The protective effects due to the prefilming treatments or to the presence of the additives in chloride solutions have been evaluated by recording the anodic and cathodic polarization curves and the polarization resistance values during 300-hour immersion tests in non deareated 0.1M NaCl solutions at 40°C. The nalysis of the obtained results allowed to differentiate the protectivity of the various compounds.
1995
Zucchi, Fabrizio; Trabanelli, Giordano; ALAGIA GONZALES, N.
File in questo prodotto:
Non ci sono file associati a questo prodotto.

I documenti in SFERA sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11392/1211093
 Attenzione

Attenzione! I dati visualizzati non sono stati sottoposti a validazione da parte dell'ateneo

Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus ND
  • ???jsp.display-item.citation.isi??? 38
social impact