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Corrosion Behavior of Rapidly Solidified Fe-Ti-P Alloys With Cu, Cr, and B Additions

Published online by Cambridge University Press:  21 February 2011

C. R. Shastry ,
R. M. Latanision  and
H. E. Townsend
C. R. Shastry
Affiliation:
Sheet Steels and Coated Products Division, Research Department, Bethlehem Steel Corporation, Bethlehem, PA 18016;
R. M. Latanision
Affiliation:
H. H. Uhlig Corrosion Laboratory, Massachusetts Institute of Technology, Cambridge, MA 02139.
H. E. Townsend
Affiliation:
Sheet Steels and Coated Products Division, Research Department, Bethlehem Steel Corporation, Bethlehem, PA 18016;
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Abstract

Rapidly solidified ribbons of Fe67Ti13P(20-x)Bx (x= 0, 7, 20 a/o) and Fe(85-y)Ti l5Py (y=5, 10 a/o) alloys were produced by melt spinning, and their structure and anodic polarization behavior were examined by x-ray diffraction and potentio-dynamic polarization measurements in deaerated 1 N H2SO4, respectively. The only alloy that developed an amorphous structure on rapid solidification, Fe67Ti13B20, exhibited poor corrosion resistance, whereas crystalline alloys with 10 a/o or more P exhibited a tendency to passivate during anodic polarization. Substituting Cr for Ti led to significant improvement in corrosion resistance and promoted development of glassy structures in Fe67(TiCr)13P13B7 compositions. No such improvements were observed when Cu was substituted for Ti. It is concluded that alloy composition is more important than degree of crystallinity in determining corrosion resistance.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 28: Symposium F – Rapidly Solidified Metastable Materials , 1983 , 219
Copyright
Copyright © Materials Research Society 1984

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References

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