Effect of Heat Treatments on Corrosion of Welded Low-Carbon Steel in Acid and Salt Environments

Saliu Ojo Seidu, Bolarinwa Johnson Kutelu

Department of Metallurgical and Materials Engineering, Federal University of Technology, Akure, Nigeria.
Department of Mineral Resources Engineering, Federal Polytechnic, Ado-Ekiti, Nigeria.

DOI: 10.4236/jmmce.2013.13018                

Abstract

Effect of heat treatment on the corrosion of welded low-carbon steel in 0.3 M and 0.5 M of hydrochloric acid and sodium chloride environments at ambient temperature (25^oC) has been investigated. Arc welded low-carbon steel sample of known composition were subjected to the corrosion reagents for 21 days (504 hours). pH and weight loss values were taken at interval of 3 days. Thereafter, weight loss method was used to measure therate of corrosion attack on the heat treated samples at ambient temperature. Results obtained showed that at low concentration, the annealed sample exhibits better corrosion characteristic as compared to the normalized and quenched samples. However, at higher concentration the normalized sample exercised better service performance over the annealed and quenched samples. Thequenched sample was found to have relatively low corrosion performance over the annealed and normalized samples at both low and high concentrations of the media.

Keywords

Low-Carbon Steel; Heat Treatments; Microstructure; pH

Conflicts of Interest

The authors declare no conflicts of interest.

References

[1]	T. Senthilkumar and T. K. Ajiboye, “Effect of Heat Treatment Processes on the Mechanical Properties of Medium Carbon Steel,” Journal of Minerals and Materials Characterization and Engineering, Vol. 11, No. 2, 2012, pp. 143-152.
[2]	P. R. Roberge, “Hand Book of Corrosion Engineering,” Mc Graw-Hill Inc., New York, 2000, pp. 65-72.
[3]	S. Nicholas, “Rust Is Risk,” Intech, USA, 2009.
[4]	J. Trevor, “More than 250 Feared Dead in Nigeria Pipeline Explosion,” WSWS, News and Analysis Africa, 2005.
[5]	M. A. Bodude, “Integrity Assessment of Locally Produced Low-Carbon Steel For Oil and Gas Transportation,” Ph.D. Thesis, Federal University of Technology, Akure, 2006.
[6]	K. R. Trethewey and P. R. Roberge, “Corrosion Management in the Twenty-First Century,” British Corrosion Journal, Vol. 30, No. 3, 1995, pp. 192-197. doi:10.1179/000705995798113925
[7]	O. O. Daramola, B. O. Adewuyi and I. O. Oladele, “Corrosion Behaviour of Heat Treated Rolled Medium Carbon Steel in Marine Environment,” Journal of Minerals and Materials Characterization and Engineering, Vol. 10, No. 10, 2011, pp. 888-903
[8]	A. V. Adedayo, S. A. Ibitoye and O. A. Oyetoyan, “Annealing Heat Treatment Effects on Steel Welds,” Journal of Minerals and Materials Characterization and Engineering, Vol. 9, No. 6, 2010, pp. 547-557.
[9]	R. A. Higgins, “Engineering Materials and Applied Physical Metallurgy Part 1,” 6th Edition, Arnold Hodder Headline Group, 1993, pp. 31-33.
[10]	Y. U. Lakhtin, “Engineering Physical Metallurgy and Heat Treatment,” MIR Publishers, Moscow, 1979, pp. 183-185.
[11]	D. T. Oloruntoba, O. O. Oluwole and E. O Oguntade, “Comparative Study of Corrosion Behaviour of Galvanized Steel and Coated Al 3103 Roofing Sheets in Carbonate and Chloride Environments,” Materials and Design, Vol. 30, 2009, pp. 1371-1376.
[12]	G. H. Aydogdu and M. K. Aydinol, “Determination of Susceptibility to Intergranular Corrosion and Electrochemical Reactivation Behaviour of AISI 316l Type Stainless Steel,” Corrosion Science, Vol. 48, 2006, pp. 3565- 3583.
[13]	F. O. Aramide, E. O. Olorunniwo, P. O. Atanda and J. O. Borode, “Corrosion Characteristics of As-Cast Ductile Iron in Lime Juice,” Journal of Minerals and Materials Characterization and Engineering, Vol. 9, No. 10, 2010, pp. 867-877.
[14]	A. S. Fouda, L. H. Madkour, A. A. El-Shafie and A. A. El-Asklany, “Inhibitory Effect of Some Carbazides on Corrosion of Aluminum in HCl and NaOH Solutions,” Materialwissenschaft und Werkstofftechnik, Vol. 26, No. 6, 1995, pp. 342-346.