Alk. Apostolopoulos, A. Drakakaki, G. Konstantopoulos, Th. Matikas
Price: 50 руб.
The aim of this study is to determine the occurrence of sulfi des (MnS, FeS) in the cross section of two different reinforcing steel rebars, BSt420 and B500c Tempcore. The mechanical performance against chloride corrosion of steel bars was evaluated by means of mechanical tensile tests, before and after corrosion, and Scanning Electron Microscopy (SEM) techniques. In particular, the influence of corrosion of a set of reinforcement steels on the tensile strength of steel bars was studied. The experimental results showed that the steel type exhibiting the highest resistance, as far as chloride corrosion is concerned, was reinforcing steel BSt420. On the contrary, B500c Tempcore presents the minimal corrosion resistance, and this can be attributed to a higher sulfide content at least on the external surface of 500μm.
Keywords: corrosion of steel bars, mass loss, chloride induced corrosion, mechanical properties of steel rebars, sulfi des in steel rebars.
REFERENCES
1. Yu, L., François, R., Dang, V.H., L’Hostis, V., & Gagné, R. Structural Performance
of RC Beams Damaged by Natural Corrosion under Sustained Loading in a Chloride
Environment. Engineering Structures, 2015, Vol. 96, 30–40.
2. Williams, D.E., Kilburn, M.R., Cliff, J., & Waterhouse, G.I.N. Composition
changes around sulfide inclusions in stainless steels, and implications for the initiation
of pitting corrosion. Corrosion Science, 2010, Vol. 52, 3702–3716.
3. Kiessling, R. Nonmetallic Inclusions and their Effects on the Properties of Ferrous
Alloys. Encyclopedia of Materials: Science and Technology, 2001, 6278–6283.
4. Temmel, C., Ingesten, N.-G., & Karlsson, B. Fatigue anisotropy in cross-rolled,
hardened medium carbon steel resulting from MnS inclusions. Metallurgical and Materials Transactions A, 2006, Vol. 37, Iss. 10, 2995–3007.
5. Apostolopoulos, A., Matikas, T., Apostolopoulos, C., & Diamantogiannis, G. Pit
Corrosion Examination of Bare and Embedded Steel Bar. 10th International Confer-
ence "Advanced Metallic Materials and Technology", 2013, Saint Petersburg, Russia,
pp. 489–495.
6. Kappatos, V, & Apostolopoulos, C. Tensile Mechanical Properties Prediction
of Reinforcing B500c Steel Bars in Coastal Structures. Materials Evaluation, 2013,
71(1) , 83–89.
7. Papadopoulos, M.P., Apostolopoulos, C.A., Alexopoulos, N.D., & Pantelakis, S.G.
Effect of salt spray corrosion exposure on the mechanical performance of different
technical class reinforcing steel bars. Materials and Design, 2007, 28(8), 2318–2328.
8. ASTM B 117-94, Standard particle for operating Salt Spray (fog) apparatus,
ASTM International, West Conshohocken, Pennsylvania, 1994.
9. ASTM G1-90, Standard Guide for Developing and Selecting Wear Tests, ASTM
International, West Conshohocken, Pennsylvania, 2006.
10. ISO 15630-1, Steel for the Reinforcement and Prestressing of Concrete —Test
Methods — Part 1: Reinforced Bars, Wire Rod and Wire, International Organization
for Standardization, Geneva, Switzerland, 2010.
11. Papadopoulos, M.P., Apostolopoulos, C.A., Alexopoulos, N.D., & Pantelakis, S.G. Effect of salt spray corrosion exposure on the mechanical performance
of different technical class reinforcing steel bars. Materials and Design, 2007, 28(8),
2318–2328.
12. Ou, Y.C., Fan, H.D., & Nguyen, N.D. Long-term seismic performance of reinforced concrete bridges under steel reinforcement corrosion due to chloride attack.
Earthquake Engineering and Structural Dynamics, 2013, 42(14), pp. 2113–2127.
13. Apostolopoulos, C.A., & Diamantogiannis, G. Structural Integrity Problems in
Dual-Phase High Ductility Steel Bar. Applied Mechanical Engineering, 2012, 2:115.
doi: 10.4172/2168-9873.1000115
14. Apostolopoulos, C., Diamantogiannis, G., & Kodzhaspirov, G.E. A Micro
Mechanical Study Investigating the Failure Process in Dual-Phase Ultrafine Grained
B500c Steel Bar. Nanotechnologies of Functional Materials (nfm’2012), Saint Petersburg, 27-29 June, 2012, pp. 148–153.
15. Apostolopoulos, C., Diamantogiannis, G., & Apostolopoulos, A. Assessment
of the mechanical behavior in dual phase steel B400C, B450C and B500B in marine
environment. Journal of Materials in Civil Engineering, 2015. doi: 10.1061/(ASCE)
MT.1943-5533.0001271
