Microstructure and corrosion resistance of Fe-Al intermetallic coating on 45 steel synthesized by double glow plasma surface alloying technology
| Autor: | Xue-dong Gu, Zhengjun Yao, Wei Cong, Xiao-lin Zhu, Pingze Zhang |
|---|---|
| Rok vydání: | 2009 |
| Předmět: |
Materials science
Metallurgy Metals and Alloys Intermetallic FEAL Substrate (electronics) engineering.material Geotechnical Engineering and Engineering Geology Condensed Matter Physics Microstructure Corrosion Diffusion layer Coating Materials Chemistry engineering Composite material Layer (electronics) |
| Zdroj: | Transactions of Nonferrous Metals Society of China. 19:143-148 |
| ISSN: | 1003-6326 |
| DOI: | 10.1016/s1003-6326(08)60242-3 |
| Popis: | A binary Fe-Al alloyed layer was synthesized on 45 steel by means of double glow plasma surface alloying technique. The corrosion-resisting layer prepared is composed of a sedimentary layer and a diffusion layer, with a total thickness of about 180 μm. The aluminum content of the alloyed layer shows gradual change from surface to the inside of substrate. The ideal profile is beneficial to the metallurgical bonding of the surface alloying layer with substrate materials. The microstructure of both layers consists of the Fe-Al intermetallic compound, which is FeAl with B2 structure in the sedimentary layer and Fe3Al with incompletely ordered DO3 structure in the diffusion layer. The protective film exhibits high micro-hardness. In comparison with the substrate of 45 steel, the corrosion resistance of the aluminized sample is much higher in 2.0% Na2S and 0.05 mol/L Na2SO4 + 0.5 mol/L NaCl mixed solutions. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full Text from ScienceDirect