The effect of silicon content on the pitting corrosion of duplex stainless steel weldment

• Autorzy: Lee B.H. , Lee H.J. , Kang D.W. , Lee H.W.
• Języki publikacji: EN

Abstrakty

EN

In this study, the effect of Si content at a welded DSS on the pitting resistance was investigated. Design/methodology/approach: The δ-ferrite fraction increased due to addition of Si, and the amount of γ2 decreased. In the ferric chloride pitting test, the weight reduction range decreased due to an increase in the Si content. As to the location, pittings occurred intensively at the grain boundary or within the austenite grain due to the difference in PREN caused by the differential solid solubility in each phase. Findings: As a result of the potentiodynamic polarization test, while the Epit(Critical Pitting Potential) of all specimens depending on the temperature were observed to be similar at froom temperature up to 45°C, the reduction range of the Epit was found to be small at the temperature higher than 45°C as Si content increased. This was found to be because of formation of SiO2 in the passive film. Research limitations/implications: Higher the addition of Si, the more the number of pittings generated at the grain boundary decreased as the coherence of the passive film increased by the Si accumulated at the boundary. Originality/value: In this study, we intend to investigate the effect of Si element addition on the pitting resistance of the duplex stainless steel welding zone.

Słowa kluczowe

EN

duplex stainless steel; pitting corrosion; silicon; potentiodynamic polarization

PL

stal nierdzewna duplex; korozja wżerowa; silikon; polaryzacja potencjodynamiczna

• Wydawca: International OCSCO World Press
• Czasopismo: Archives of Materials Science and Engineering
• Rocznik: 2014
• Tom: Vol. 67, nr 2
• Strony: 60--69
• Opis fizyczny: Bibliogr. 27 poz.

Twórcy

autor

Lee B.H.

• Department of Materials Science and Engineering, Dong-A University, 840 Hadan-dong, Saha-gu, Busan 604-714, Republic of Korea

autor

Lee H.J.

• Department of Materials Science and Engineering, Dong-A University, 840 Hadan-dong, Saha-gu, Busan 604-714, Republic of Korea

autor

Kang D.W.

• Department of Materials Science and Engineering, Dong-A University, 840 Hadan-dong, Saha-gu, Busan 604-714, Republic of Korea

autor

Lee H.W.

• Department of Materials Science and Engineering, Dong-A University, 840 Hadan-dong, Saha-gu, Busan 604-714, Republic of Korea

Bibliografia

• [1] J.O. Nilsson, Super duplex stainless steels, Materials Science and Technology 8/ (1992) 685-700.
• [2] S.-K. Ahn, J.-S. Kim, K.-T. Kim, Journal of KWS 22 (2010) 22.
• [3] B. Deng, Y. Jiang, J. Gong, Ch. Zhong, J. Gao, J. Li, Critical pitting and repassivation temperatures for duplex stainless steel in chloride solutions, Electrochimica Acta 53/16 (2008) 5220-5225.
• [4] J. Chater, The Irresistible Rise of Duplex, Stainless Steel World December (2007) 48-51.
• [5] F. Eghbali, M.H. Moayed, A. Davoodi, N. Ebrahimi, Critical pitting temperature (CPT) assessment of 2205 duplex stainless steel in 0.1 M NaCl at various molybdate concentrations, Corrosion Science 53/1 (2011) 513-522.
• [6] R.N Gunn, Duplex Stainless Steel, Woodhead Publishing Ltd, Abinton, 1997.
• [7] V.M. Linton, N.J. Laycock, S.J. Thomsen, A. Klumpers, Failure of a super duplex stainless steel reaction vessel, Engineering Failure Analysis 11/2 (2004) 243-256.
• [8] ASTM Standard G48-11, Standard Test Methods for Pitting and Crevice Corrosion Resistance of Stainless Steels and Related Alloys by use of Ferric Chloride Solution, ASTM, Philadelphia, 2011.
• [9] A.J. Sedriks, Corrosion of stainless steels, Wiley & Sons, Inc., New York, 1996.
• [10] N.D. Tomashov, G.P. Chernova, O.N. Marcova, Effect of Supplementary Alloying Elements On Pitting Corrosion Susceptibility Of18Cr-14Ni Stainless Steel, Corrosion 20/5 (1964) 166t-173t.
• [11] R. Merello, F.J. Botana, J. Botella, M.V. Matres, M. Marcos, Influence of chemical composition on the pitting corrosion resistance of non-standard low-Ni high-Mn-N duplex stainless steels, Corrosion Science 45/5 (2003) 909-921.
• [12] J.H. Potgiter, P.A. Olubambi, L. Cornish, C.N. Machio, E.M. Sherif, Influence of nickel additions on the corrosion behaviour of low nitrogen 22% Cr series duplex stainless steels, Corrosion Science 50/9 (2008) 2572-2579.
• [13] I. Alvarez-Armas, S. Degallaix-Moreuil, Duplex Stainless Steel, ISTE Ltd and Wiley & Sons, Inc., London and Hoboken, 2009.
• [14] J.C. Lippold, D.J. Kotecki, Welding Metallurgy and Weldability of Stainless Steels, Wiley & Sons, Inc., Hoboken, 2005.
• [15] D.N. Lee, H.N. Han, Directed growth of ferrite in austenite and Kurdjumov-Sachs orientation relationship, Materials Science Forum 715-716 (2012) 128-133.
• [16] ASTM Standard G 46-94, Standard Guide for Examination and Evaluation of Pitting Corrosion, ASTM, Philadelphia, 2005.
• [17] Y. Jang, S. Kim, J. Lee, Effect of different mo contents on tensile and corrosion behaviors of CD4MCU cast duplex stainless steels, Metallurgical and Materials TransactionsA 36/5 (2005) 1229-1236.
• [18] S.H. Bae, H.W. Lee, Effect of Mo contents on corrosion behaviors of weldedduplex stainless steel, Metals and Materials International 19/3 (2013) 563-569.
• [19] J.S. Dunning, D.E. Alman, Oxidation and Sulfidation Resistant Alloys with Silicon Additions, NETL, Pittsburgh, 2003.
• [20] P. Baradlai, J.H. Potgieter, W.O. Barnard, L. Tomcsanyi, K. Varga, Investigation of Spontaneous Passivation of Stainless Steels Modified with Ruthenium, Materials Science Forum 185-188 (1995) 759-768.
• [21] E.M. Sherif, Effects of 2-amino-5-(ethylthio)-1,3,4-thiadiazole on copper corrosion as a corrosion inhibitor in 3% NaCl solutions, Applied Surface Science 252/24 (2006) 8615-8623.
• [22] J.E. May, C.A.C. de Sousa, S.E. Kuri, Aspects of the anodic behaviour of duplexstainless steels aged for long periods at low temperatures, Corrosion Science 45/7 (2003) 1395-1403.
• [23] M. Bojinov, G. Fabricius, T. Laitinen, T. Saario, G. Sundholm, Conduction mechanism of the anodic film on chromium in acidic sulphate solutions, Electrochimica Acta 44/2-3 (1998) 247-261.
• [24] H. Tsuchiya, S. Fujimoto, O. Chihara, T. Shibata, Semiconductive behavior of passive films formed on pure Cr and Fe-Cr alloys in sulfuric acid solution, Electrochimica Acta 47/27 (2002) 4357-4366.
• [25] A.A. Hermas, K. Ogura, S. Takagi, T. Adachi, Effects of Alloying Additions on Corrosion and Passivation Behaviors of Type 304 Stainless Steel, Corrosion 51/1 (1995) 3-10.
• [26] J.S. Armijo, B.E. Wilde, Influence of Si content on the corrosion resistance of austenitic Fe-Cr-Ni alloys in oxidizing acids, Corrosion Science 8/9 (1968) 649-664.
• [27] B.E. Wilde, Influence of Silicon on the Intergranular Corrosion Behavior of 18Cr-8Ni Stainless Steels, Corrosion 44/10 (1988) 699-704.