Effect of Chromium on the Oxidation of a Fe-10 Al Alloy at 1000°C


Article Preview

The effect of the addition of 5 and 10 at.% Cr on the oxidation of a binary Fe-10 at.% Al alloy (Fe-10Al) was studied in 1 atm O2 at 1000°C. Fe-10Al underwent a very slow initial nearly-parabolic stage followed by a breakaway composed of two subsequent parabolic stages with a smaller rate constant for the final period. The two ternary alloys (Fe-5Cr-10Al and Fe-10Cr-10Al) presented two parabolic stages with final rate constants similar to each other and much lower than that for Fe-10Al. The alumina scale developed initially on Fe-10Al was replaced later by a layered scale containing mixtures of Fe and Al oxides plus many Fe-rich oxide nodules. Fe-5Cr-10Al was mostly covered by a thin alumina layer just above the alloy surface with some Fe-rich nodules formed in the beginning of oxidation, which later on were healed by alumina with a large decrease of the oxidation rate. A continuous alumina layer formed on the whole sample surface without any Fe-rich nodule for Fe-10Cr-10Al. Therefore, the addition of chromium is obviously beneficial for the oxidation resistance of Fe-10Al by inhibiting the formation of fast-growing Fe-containing oxides and promoting the development of an exclusive alumina layer. However, the effect of chromium is different from the classical third-element effect.



Materials Science Forum (Volumes 475-479)

Main Theme:

Edited by:

Z.Y. Zhong, H. Saka, T.H. Kim, E.A. Holm, Y.F. Han and X.S. Xie




Z.G. Zhang and Y. Niu, "Effect of Chromium on the Oxidation of a Fe-10 Al Alloy at 1000°C", Materials Science Forum, Vols. 475-479, pp. 685-688, 2005

Online since:

January 2005





[1] F.H. Stott, G.C. Wood, and J. Stringer: Oxidation of Metals Vol. 44 (1995), p.113.

[2] W.C. Hagel: Corrosion Vol. 21 (1965), p.316.

[3] F. Saegusa and L. Lee: Corrosion Vol. 22 (1966), p.168.

[4] W.E. Boggs: Journal of Electrochemistry Society Vol. 118 (1971), p.906.

[5] P. Tomaszewicz and G.R. Wallwork: Oxidation of Metals Vol. 19 (1983), p.165.

[6] P. Tomaszewicz and G.R. Wallwork: Review on High Temperature Materials Vol. 4 (1978), p.75.

[7] E.A. Gulbransen and K.F. Andrew: Journal of the Electrochemical Society Vol. 106 (1959), p.294.

[8] F.H. Stott, G.C. Wood, and M.G. Hobby: Oxidation of Metals Vol. 3 (1971), p.103.

[9] M. Lambertin, A. Stoklosa, and W.W. Smeltzer: Oxidation of Metals Vol. 15 (1981), p.355.

[10] R.G. Miner and V. Nagarajan: Oxidation of Metals Vol. 16 (1981), p.313.

[11] P. Tomaszewicz and G.R. Wallwork: Oxidation of Metals Vol. 20 (1983), p.75.

[12] S.E. Sadique, A.H. Mollah, M.S. Islam, M.M. Ali, M.H.H. Megat, and S. Basri: Oxidation of Metals Vol. 54 (2000), p.385.

DOI: https://doi.org/10.1023/a:1004682316408

[13] T. Massalski: Binary Alloys Phase Diagrams (ASM, Metals Park, USA 1990).

[14] Z.G. Zhang et al.: to be published.

[15] C. Wagner: Journal of the Electrochemical Society Vol. 99 (1952), p.369.

[16] F. Gesmundo and Y. Niu: Oxidation of Metals Vol. 50 (1998) p.1.

[17] C. Wagner: Corrosion Science Vol. 5 (1965), p.751.

[18] P. Kofstad: High Temperature Corrosion (Elsevier Applied Science, New York 1988).

Fetching data from Crossref.
This may take some time to load.