Corrosion of AISI4130 in différents électrolytiques solution

Auteurs :  ALLOU Djilali, MIROUD Djamel, CHENITI Bilal
Année : 2018
Domaine : Sciences et génie des matériaux
Type : Communication
Conférence: The 6th International Conference on Welding, Non Destructive Testing and Materials Industry (IC-WNDT-MI’18)
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Mots clés : AISI 4130, electrolytes H2SO4, HCl and NaCl

Résumé : 

This article discusses the electrochemical behavior of AISI 4130 alloy steel in various electrolyte solutions H2SO4, HCl and NaCl. Corrosion tests were carried out on a potentiostat / galvanostatat room temperature in the various electrolytes, under an Ag / AgCl reference electrode with .Electrochemical Impedance Spectroscopy (EIS) measurement. The results obtained through the tafel curves show that the corrosion process can be divided in two parts highlighting the aggressivity of Cl- ions. The impedance which is characterized by a large semicircle in the Nyquist graph increases under H2SO4.Equivalent circuits have been determined to represent the corrosion processes at differente ectrolytes.