The rust layer plays an important role in the corrosion of steel in chlorinated environments. Salt spray, po- tentiodynamic polarization curve and tensile test were conducted in laboratory for the specimens after two-stage heat treatment. The influence of the alloying elements on mechanical properties and corrosion resistance of three kinds of steels was investigated by observing the microstructure and the morphologies of rust layer. The results show that the highest value (29%) of total elongation for steel A is obtained. The mechanical property of the specimen for steel C exhibits best strength ductility balance (21 384 MPa ·%) because of the presence of the multiphase microstructures after a two-stage heat treatment and the addition of the alloying elements. The corrosion products are known to be a complex mixture of Fe3O4 , Fe2O3 and α-FeOOH for steel C. The presence of the alloying elements results in the for mation of compact and dense rust layers in steel B and C. Passive film protects the substrate of TRIP (transformation induced plasticity) steel containing a complex mix of multiphase. Superior corrosion performance is exhibited for steel C with low alloying contents due to the enrichment of alloying elements within the rust layers.
参考文献
| [1] | Syed S .Atmospheric Corrosion of Carbon Steel at Marine Sites in Sandi Arabia[J].Materials and Corrosion,2010,61(03):238. |
| [2] | Os6rio W R;Peixoto L C;Garcia L R et al.Electrochemical Corrosion Response of a Low Carbon Heat Treated Steel in a NaC1 Solution[J].Materials and Corrosion,2009,60(10):804. |
| [3] | Seongho Han;Hwangoo Seong;Yeonsang Ahn .Effect of Alloying Elements and Coiling Temperature on the Recrystallization Behavior and the Bainitic Transformation in TRIP Steels[J].Metals and Materials International,2009(4):521-529. |
| [4] | LI Zhuang,WU Di,L(U) Hui-sheng.Effect of Thermomechanical Processing on Mechanical Properties of Hot Rolled Multiphase Steel[J].钢铁研究学报（英文版）,2008(01):55-60. |
| [5] | Zhuang Li;D. WU .Effects of hot deformation and subsequent austempering on the mechanical properties of Si-Mn TRIP steels[J].ISIJ International,2006(1):121-128. |
| [6] | Corrosion behavior of nickel alloyed and austempered ductile irons in 3.5% sodium chloride[J].Corrosion Science: The Journal on Environmental Degradation of Materials and its Control,2010(9):P.2945. |
| [7] | Liu C T;Wu J K .Influence of PH on the Passivation Behavior of 254SMO Stainless Steel in 3.50/00 NaC1 Solution[J].Corro-sion Science,2007,49(05):2198. |
| [8] | Keiser J T;Brown C W;Heidersbach R H .Electrochemical Reduction of Rust Films on Weathering Steel Surfaces[J].Journal of the Electrochemical Society,1982,129(12):2686. |
| [9] | He Y D;Qi H B.Corrosion and Protection of Material[M].北京:机械工业出版社,2005 |
| [10] | A. Pardo;M.C Merino;A.E. Coy;F. Viejo;R. Arrabal;E. Matykina .Pitting corrosion behaviour of austenitic stainless steels - combining effects of Mn and Mo additions[J].Corrosion Science: The Journal on Environmental Degradation of Materials and its Control,2008(6):1796-1806. |
| [11] | Zhang Q C;Ma F;Wu J S et al.Mechanical Properties o:Native Rust Layer Formed on a Low Alloy Steel Exposed inMarine Atmosphere[J].ISIJ International,2002,42(05):534. |
| [12] | Miyuki H;Yamashita M;Fujiwara M et al.Ion Selective Properties of Rust Membranes and Protective Effect of Stable Rust Layer Formed on Weathering Steel[J].Zairyo to Kankyo/Corrosion Engineering,1998,47(03):186. |
| [13] | Chen Y Y;Tzeng H J;Wei L I et al.Mechanical Properties and Corrosion Resistance of Low-Alloy Steels in Atmospheric Conditions Containing Chloride[J].MateriaIs Science and En gineering,2005,398A:47. |
| [14] | Toshiaki O;Tomohiro K .Enhancement of Electric Conduc tivity of the Rust Layer by Adsorption of Water[J].Corro sion Science,2005,47(10):2571. |
| [15] | F. Corvo;T. Perez;L.R. Dzib;Y. Martin;A. Castaneda;E. Gonzalez;J. Perez .Outdoor-indoor corrosion of metals in tropical coastal atmospheres[J].Corrosion Science: The Journal on Environmental Degradation of Materials and its Control,2008(1):220-230. |
| [16] | Hiroki Tamura .The role of rusts in corrosion and corrosion protection of iron and steel[J].Corrosion Science: The Journal on Environmental Degradation of Materials and its Control,2008(7):1872-1883. |
- 下载量()
- 访问量()
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%