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Corrosion behaviour of carbon steel coated with Zr‐based metallic glass
Author(s) -
Schneider F.,
Schwarz W.,
Eckert J.,
Gebert A.,
Raju V. R.
Publication year - 2002
Publication title -
materials and corrosion
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.487
H-Index - 55
eISSN - 1521-4176
pISSN - 0947-5117
DOI - 10.1002/1521-4176(200202)53:2<85::aid-maco85>3.0.co;2-9
Subject(s) - chemistry , corrosion , electrolyte , microstructure , metallurgy , nuclear chemistry , alloy , metal , carbon steel , analytical chemistry (journal) , materials science , electrode , chromatography
Zr 55 Cu 30 Al 10 Ni 5 glassy alloy samples were prepared by the single roller melt spinning technique in an argon atmosphere. Amorphous ribbons were coated on carbon steel by the electron beam technique. Subsequently, the coated region was remelted to study its effect on the corrosion performance. The microstructure of the ribbons and of coated steel samples was characterized by X‐ray diffraction (XRD) and optical microscopy (OM). Potentiodynamic polarization studies were carried out in 0.1 M Na 2 SO 4 electrolytes at pH = 8 and pH = 2. The coated samples showed a significant increase in corrosion resistance compared to the base carbon steel in both sulphate electrolytes. The pitting corrosion behaviour of the coated samples has been examined in 0.01 M NaCl electrolyte and was found to be poor. Furthermore, the galvanic and crevice corrosion behaviour of these alloys has been evaluated in the chloride electrolyte.