The Effect of Chromium and Manganese Addition on the Corrosion of As-cast Al-Si-Fe-Cu Alloy System in Caustic Soda

Authors

  • S.A. Yaro Department of Metallurgical and Materials Engineering, Ahmadu Bello University, Zaria P.M.B 1045, Zaria, Nigeria
  • V.S. Aigbodion Department of Metallurgical and Materials Engineering, Ahmadu Bello University, Zaria P.M.B 1045, Zaria, Nigeria

DOI:

https://doi.org/10.18321/ectj443

Abstract

The effect of chromium and manganese addition on the corrosion of Al-Si-Fe-Cu alloy system in caustic soda (NaOH) at room temperature (28 °C) was investigated using weight loss method. The alloys containing 0.1 to 0.3% Cr and Mn were produced and sand cast into cylindrical test bars at the foundry shop of the National Metallurgical Development Center, Jos. After casting the microstructures of the as- cast alloys were determined. The as-cast test bars were machined to corrosion coupons and immersed into 0.5M NaOH solution and their rate of corrosion determined using the weight loss method. It was observed that  simultaneous addition of chromium and manganese to the alloy system imparted the highest corrosion resistance to the alloy due to the formation of hard and passive phases which acted as strong protective barriers to corrosion. While addition of chromium alone to the alloy gave a better corrosion resistance than the addition of manganese alone due to the formation of passive oxide layer of chromium oxide.

References

1. Rundman, K.B., Metal Casting, Reference Book, Department of Mater. Sci. and Eng, Michigan Technical University, United States of America, 2005, p. 76-81.

2. Fontana. G.M., Corr. Eng., Third edition, McGraw book Company Publishers, Singapore, 1987, p. 120-140.

3. Rajan T.V. and Sharma C.P., Heat Treatment Principles and Techniques, Published by Prentice-Hall of India Private limited, 1988, p. 45-150.

4. Nwajagu C.O. Foundry Theory and Practice, ABC, Publishers LTD, Nigeria, 1994, p. 202-209.

5. Smithells F.G., Metal Ref. Book, Butterworth & co Publishers Ltd, 6-th edition, 1983,
p. 235-239.

6. Markandeya R. Nagarjuna S. Sarma D.S. Precipitation Hardening of Cu-Ti-Zr alloys, J. of Mater. Sci. and Tech. Vol. 20, 849:858, (2004).

7. George A.N., Corr. Data, Shell Development Company, Emeryville Cardiff, 1960, p. 102-110.

8. Avner S.H., Introduction to Phys. Metall., Second Edition, McGraw-Hill/Inc, 1974, p. 23-56.

9. Yaro S.A., Aigbodion V.S., Corr. susceptibility of As-cast locally produced Aluminum Bronze in two different acidic media, J. of Corr. Sci. and Tech., Vol. 1, 47:48, (2005).

10. Idenyi N.E., Neife S.I., The Corr. Behaviour of Aluminium Base alloys in Caustic Soda(NaOH), J. of Corr. Sci. and Tech., Vol. 1, 9:13, (2005).

11. Allen D.K. (1983): Metall. Theory and Practice American Technical Society Chicago (USA), 1983, p. 45-89.

12. Ghosh K.S., Das K., Chatterjee. U.K., Studies of the Microstructural Changes upon Retrogression and Reaging (RRA) treatment to 8090 Al-Li-Cu-Mg-Zr alloy, J. of Mater. Sci. and Tech. vol. 20, 825:834, (2004).

Downloads

Published

2008-01-15

How to Cite

Yaro, S., & Aigbodion, V. (2008). The Effect of Chromium and Manganese Addition on the Corrosion of As-cast Al-Si-Fe-Cu Alloy System in Caustic Soda. Eurasian Chemico-Technological Journal, 10(1), 79–84. https://doi.org/10.18321/ectj443

Issue

Vol. 10 No. 1 (2008)

Section

Articles

License

You are free to: Share — copy and redistribute the material in any medium or format. Adapt — remix, transform, and build upon the material for any purpose, even commercially.

Eurasian Chemico-Technological Journal applies a Creative Commons Attribution 4.0 International License to articles and other works we publish.

Subject to the acceptance of the Article for publication in the Eurasian Chemico-Technological Journal, the Author(s) agrees to grant Eurasian Chemico-Technological Journal permission to publish the unpublished and original Article and all associated supplemental material under the Creative Commons Attribution 4.0 International license (CC BY 4.0).

Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI.