Corrosion Characteristics of Ascast Ductile Iron in Lime Juice
- 1 Metallurgical and Materials Engineering Department, Federal University of Technology,Akure, Ondo State, Nigeria.
- 2 Materials Science and Engineering Department, Obafemi Awolowo University, Ile-Ife,Osun State, Nigeria
- 3 Materials Science and Engineering Department, Obafemi Awolowo University, Ile-Ife,Osun State, Nigeria.
- 4 Metallurgical and Materials Engineering Department, Federal University of Technology,Akure, Ondo State, Nigeria.
Abstract
A study on the corrosion characteristics of ascast ductile iron in lime juice was conducted using the common weight loss method. Five standard tensile samples were prepared from the ascast condition of the alloy. One of them was taken to be for control, while the others were labeled A, B, C, and D. These labeled samples were then immersed in freshly extracted lime juice for a period of four weeks, having noted their respective initial weights. A sample was withdrawn from the medium at the end of each week for microstructural and tensile properties (using INSTRON 1195 at a fixed crosshead speed of 10mm min -1 ) examination for comparison with those of the control sample. It was observed that the mechanical properties of the alloy were deteriorating due to pitting corrosion and that the corrosion rate increases with increase in the pH of the medium. It was concluded that corrosion rate can be kept to the minimum by controlling the pH of the media within the range 2.0 to 3.05.
- Aver, S.H., (1974); Introduction to physical metallurgy second edition McGraw-Hill Publishers, Londion pp: 146.
- Prasanna, N. D. (2000); Effect of processes variables on the structure mechanical properties and wear characteristics of Austempred Ductile Iron, Ph.D thesis, submitted to Bangalore University, March 2000.
- Allen, D.K., (1983); Metallurgy theory and practice, American technical society Chicago.
- Grundy, R. (1979); The development and introduction of spheroidal graphite irons into an established range of malleable irons to meet current engineering requirements, Transactions of Foundrymen, Vol.72, Part-7, p141-151, July 1979.
- ASTM Annual Book “Standard Specification for Automotive Gray Iron Casting “, A159-83, Vol. 0.1-0.2, (1986).
- Morton, F.J., 1987. In Fruits of Warm Climates, 160-168, Creative Resource Systems, Inc., Winterville, N.C.
- Chaisawadi, S., W. Methawiriyasilp, D. Thongbute and T. Chayawattana, 2005. Clean Production of Commercial Freeze-dried Lime Powder for Medicinal Herb and Nutritional Health Benefits. Acta Hort., (ISHS) 679: 29-35.
- Venugopalan D. and A. Alagarsamy, 1990. "Effects of Alloy Additions on the Microstructure and Mechanical Properties of Commercial Ductile Iron." Transactions, American Foundrymen’s Society, 98: 90-122.
- George. A.N., 1960., Corrosion data, shell development Company, Emeryville Cardiff.
- ASTM Annual Book “Standard Specification for Automotive Gray Iron Casting “, A159-83, Vol. 0.1-0.2, (1986).
- Chen X. H., Chen C. S., Xiao H. N., Cheng F. Q., Zhang G., Yi G. J., Corrosion Behaviour of Carbon Nanotubes-Ni Composite Coating, Journal of Surface and Coating Technology 191, 2005, p. 351-356.
- Ashassi-Sorkhabi H., Ghalebsaz- Jeddi N., Hashemzadeh F., Jahani H., Corrosion Inhibition of Carbon Steel in Hydrochloric Acid by Some Polyethylene Glycols, Journal of Electrochimica Acta 51, 2006, p. 3848-3854.
- Jabeera B., Shibli S. M. A., Anirudhan T. S., Synergistic Inhibitive Effect of Tartarate and Tunstate in Preventing Steel Corrosion in Aqueous Media, Journal of Surface Science 252, 2006, p. 3520-3524.
- Davies. D.J. and L.A. Oclmann,. 1983. The structures, properties and heat treatment of metals pitman books ltd, Publisher’s.
- http://practicalaction.org/docs/technical_information_service/lime_juice.pdf