Aluminizing Mechanism and Corrosion Resistance of Pipeline Steel X80 by Combined Pack Cementation Process under Low Temperature
| Periodical | Advanced Materials Research (Volumes 194 - 196) |
|---|---|
| Main Theme | Advanced Engineering Materials |
| Edited by | Jianmin Zeng, Taosen Li, Shaojian Ma, Zhengyi Jiang and Daoguo Yang |
| Pages | 232-236 |
| DOI | 10.4028/www.scientific.net/AMR.194-196.232 |
| Citation | Min Huang et al., 2011, Advanced Materials Research, 194-196, 232 |
| Online since | February, 2011 |
| Authors | Min Huang, Yu Wang, Xiang Hong Lv |
| Keywords | Corrosion Resistance, Low-Temperature Pack Aluminizing, Pipeline Steel X80, Surface Mechanical Attrition Treatment (SMAT) |
| Price | US$ 28,- |
In order to improve the corrosion resistance of pipeline steel X80 and maintain its good mechanical properties simultaneously, a low-temperature pack aluminizing process was carried out at 723 K on pipeline steel X80 after a surface mechanical attrition treatment (SMAT). The phase composition, microstructure and element distribution of the as-aluminized pipeline steel X80 were characterized by XRD, SEM and EDS, respectively.The results show that the as-received aluminide layer consists of Fe2Al5, which exhibits a good cohesion with SMATed pipeline steel X80 substrate with the thickness of around 90 μm. The element concentrations of Al and Fe atoms show a gradual change in the range of aluminide layer. After corrosion test processed in 3.5% NaCl solution, there is no obvious corrosion crack or uphills piled up by corrosion products on the surface of as-aluminized SMATed pipeline steel, which can conclude that pack aluminizing assisting by SMAT at low-temperature is an effective way for protecting pipeline steel X80 against corrosion.
