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Date: 01/21/02 at 3:15 AM
Posted by: Jostein Røyset
E-mail: Jostein.Royset@hydro.com

In Reply to: Corrosion resistance and conductivity of Sc-Al alloys posted by Mike Fewster on 01/21/02 at 1:44 AM:

Some investigations about the influence of Sc on the corrosion properties of Al and Al-alloys have been published in the technical literature. The general trend is that Sc improves the corrosion resistance somewhat. See the end of this posting for a list of references.

When it comes to electrical conductivity, the conductivity will always decrease when Sc is added to pure Al and it will normally also decrease when Sc is added to Al-alloys. However, it is probably possible to achieve improved conductivity for a given alloy strength by substituting Sc for other alloying elements. I can't recall seeing any published investigation about Sc-containing HV conductor material.

Corrosion references:

Z. Ahmad and B.J. Abdul-Aleem:
Scandium Alloyed Al 5052: A High Performance Material for Marine Environment,
Proc. EuroCorr 2000

Z. Ahmad, A. Ul-Hamid and B.J. Abdul-Aleem:
The Corrosion Behavior of Scandium Alloyed Al 5052 in Neutral Sodium Chloride Solution,
Corros. Sci. 43 (2001) 1227-1243

R. Braun, B. Lenczowski and G. Tempus:
Effect of Thermal Exposure on the Corrosion Properties of an Al-Mg-Sc Alloy Sheet,
Mater. Sci. Forum 331-337 (2000) 1647-1652

I.N. Ganiev et al.:
Anodic Behavior of Alloys in the Systems Aluminum-Scandium(Yttrium, Praseodymium, Neodymium) in a Neutral Medium,
J. Applied Chem. USSR 60 (1986) 1961-1965

I.N. Ganiev:
High-Temperature and Electrochemical Corrosion of Aluminum-Scandium Alloys,
Protection of Metals 31 (1995) 543-546

G.V. Kharina and V.P. Kochergin:
Corrosion of Alloys of Aluminum with Zinc and Rare Earth Metals in Sodium Metavanadate Solutions,
Protection of Metals 32 (1996) 134-136

G.V. Kharina and V.P. Kochergin:
Corrosion of Aluminum Alloys with Zinc and Rare-Earth Metals in Polyvanadate Solutions,
Russ. J. Applied Chem. 69 (1996) 1576-1578

G.V. Kharina, M.V. Kuznetsov and V.P. Kochergin:
Mechanism and Kinetics of Anodic Dissolution of Aluminum and its Alloys with Zinc and Rare-Earths in a Sodium Polyvanadate Solution,
Russ. J. Electrochem. 34 (1998) 482-485

V.S. Sinyavskii, V.D. Val'kov and E.V. Titkova:
The Effect of Scandium and Zirconium Additions on Corrosion Properties of Al-Mg Alloys,
Protection of Metals 34 (1998) 549-555

T. Torma et al.:
The Effect of Scandium Addition on the Mechanical Properties of Pure Aluminium and of an AlMg6 Alloy,
Mater. Sci. Forum 13/14 (1987) 497-503

N.V. Vyazovikina:
The Effect of Scandium on the Corrosion Resistance of Aluminum and its Alloys in 3% NaCl Solution,
Protection of Metals 35 (1999) 448-453

Z.F. Wang, P. Wang, C.L. Briant and K.S. Kumar:
The Effect of Microstructure on the Polarization and Stress Corrosion Cracking in Al-5Mg Alloys,
Proc. Corrosion2000, Orlando, Florida, USA 00373/1-12

Z. Wang, P. Wang, K.S. Kumar and C.L. Briant:
Stress Corrosion Cracking of Aluminum-Magnesium Alloys Containing Scandium and Silver Additions,
Proc. Chemistry and Electrochemistry of Corrosion and Stress Corrosion Cracking, ed. R.H. Jones, TMS, 2001 573-582

Y.L. Wu, F.H. Froes, C.G. Li and J. Liu:
Effects of Microalloying with Sc, Ni and Ce on the Behavior of Ingot Aluminum Alloy C912 (Al-Zn-Mg-Cu),
Synthesis/Processing of Lightweigth Metallic Materials II, Feb. 9-13 1997 Orlando, FL, USA 73-81

Y.-L. Wu, F.H. Froes, C. Li and A. Alvarez:
Microalloying of Sc, Ni and Ce in an Advanced Al-Zn-Mg-Cu Alloy,
Metall. Mater. Trans. A 30A (1999) 1017-1024

In addition, the following presentation will be made at the TMS annual meeting in February this year:

C.L. Briant, S. Kumar, P. Wang and Z. Wang:
Corrosion and Stress Corrosion Cracking of Al-Mg Alloys

Follow Ups:

  Re: Corrosion resistance and conductivity of Sc-Al alloys RICHARD CORCUERA   Posted at: 08/06/02 (2)

  Re: Corrosion resistance and conductivity of Sc-Al alloys Jostein Røyset   Posted at: 08/06/02 (1)

  Re: Corrosion resistance and conductivity of Sc-Al alloys Rob   Posted at: 11/18/02 (0)

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