In Vitro Microstructure, Mechanical Properties and Corrosion Behaviour of Low, Medium and High Carbon Steel Under Different Heat Treatments
- 15 Downloads
Corrosion is a serious problem in the oil and gas industry and corrosion of carbon steel contributes to tonnes of material wastage daily. It is believed that corrosion rate of carbon steel is affected by the carbon content and also any heat treatment carried out on the steels. To attest whether this statement is true, an investigation was conducted on carbon steels which were heat treated and contained varying amount of carbon content. This research aims to evaluate the effect of carbon content and heat treatment to the corrosion behaviour of carbon steels. The sample materials were selected from low, medium and high carbon steels. Three types of heat treatment were performed on all the steels, namely, annealing, quenching as well as quench and temper. The corrosion behaviour was determined by conducting immersion test on the non-heat-treated and heat-treated steel samples. The immersion test was done by immersing samples in 3.5% sodium chloride solution for duration of 1, 2, 4, 5 and 6 weeks. Corrosion rates were calculated using weight loss data according to ASTM G31-72 standard. Immersion test results show that steels with high carbon content and heat treated by quenching with martensitic structure display the highest corrosion resistance, while steels with lower carbon content and heat treated by annealing with large ferrite and pearlite structure display the lowest corrosion resistance. The overall results revealed that corrosion behaviour of the carbon steels was directly affected by the carbon content and heat treatment which altered the microstructures of the steels. In other words, corrosion performance of the carbon steels is very much dependent on the final microstructures formed after heat treatment.
KeywordsCorrosion behaviour Carbon steel Heat treatment Immersion test
The authors would like to thank Universiti Teknologi Malaysia (UTM) for providing the financial support under Research University Grant (No. Q.J130000.2524.18H99), School of Mechanical Engineering (SME), Faculty of Engineering, Universiti Teknologi Malaysia for the research facilities.
- 3.Arteaga MR, Rodriguez JG, Campillo B, Tiburcio CG, Patiño GD, Lezama L, Nava JGC, Flores MA, Villafañe AM (2010) An electrochemical study of the corrosion behavior of a dual phase steel in 0.5M H2SO4. Int J Electrochem Sci 5:1786–1798Google Scholar
- 5.Boyer HE, Kubbs JJ, ASM Metals Park (1982) Heat treaters guide: standard practice and procedure for steel. P.M.Unterweiser, OhioGoogle Scholar
- 8.Al-rubaiey SI, Anoon EA, Hanoon MM (2013) The influence of microstructure on the corrosion rate of carbon steels. J Eng Technol 31:1825–1836Google Scholar
- 9.Institution of Metallurgists (Great Britain) (1963) Heat treatment of Metals. Iliffe, LondonGoogle Scholar
- 10.Wright J, Colling A, Open University (2007) Seawater: its composition, properties, and behaviour. Oxford: Butterworth HeinemannGoogle Scholar
- 11.ASTM 1-03 (2004) Standard practice for laboratory immersion corrosion testing of metals. ASTM International, West ConshohockenGoogle Scholar
- 12.ASTM G31-72 (2004) Standard practice for preparing, cleaning and evaluating corrosion test of specimens. ASTM International, West ConshohockenGoogle Scholar
- 15.Jia G, Shan Wu Y, Cheng Jia S (2008) Effect of carbon content and microstructure on corrosion resistance of low alloy steels. Chin J Iron Steel 43(9):50–58Google Scholar
- 19.Ismail A, Adan NH (2014) Effect of oxygen concentration on corrosion rate of carbon steel in seawater. Am J Eng Res (AJER) 3:64–67Google Scholar
- 24.Scheuer CJ, Fraga RA, Cardoso RP, Brunatto SF (2014) Effects of heat treatment conditions on microstructure and mechanical properties of AISI 420 steel 2014. J Alloy Compd 509:5857–5867Google Scholar
- 26.Opiela M, Grajcar A, Krukiewicz W (2009) Corrosion behaviour of Fe-Mn-Si-Al austenitic steel in chloride solution. J Achiev Mater Manufact Eng 33(2):159–165Google Scholar