Inhibidores de escaso impacto medioambiental. Sistemas basados en tierras raras

  1. Aballe, A. 1
  2. Bethencourt, M. 1
  3. Botana, F. J. 1
  4. Marcos, M. 2
  5. Pérez, J. 1
  6. Rodríguez, M. A. 1
  1. 1 Dpto. de Ciencia de los Materiales e Ingeniería Metalúrgica y Química Inorgánica. Facultad de Ciencias. Universidad de Cádiz
  2. 2 Dpto. de Ingeniería Mecánica y Diseño Industrial. Escuela Superior de Ingeniería. Universidad de Cádiz
Journal:
Revista de metalurgia

ISSN: 0034-8570

Year of publication: 1997

Volume: 33

Issue: 6

Pages: 363-369

Type: Article

DOI: 10.3989/REVMETALM.1997.V33.I6.770 DIALNET GOOGLE SCHOLAR lock_openOpen access editor

More publications in: Revista de metalurgia

Abstract

Lanthanum, Cerium and Samarium chlorides have been investigated as uniform and pitting corrosion inhibitors of AISI 434 and AISI 304 stainless steels and AA 5083 Al-Mg alloy in 3.5 % NaCl aerated aqueous solutions. Their inhibitor power was evaluated by using electrochemical techniques such as Linear and Cyclic Polarisation. In each case, the highest protection degree was found in the solution dopped with 500 ppm of CeCl3. Similar results were obtained for additions of 500 ppm of LaCl3. Scanning Electron Microscopy and Energy Dispersive Spectroscopy allowed us to confirm the cathodic nature of the inhibition process.

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