ALUMINIZING OIL CASING STEELN80BY A LOW-TEMPERATURE PACK PROCESSING MODIFIED WITH ZINC ADDITION

Min Huang (), Yu Wang and Xiao Yong Zhang
Additional contact information
Min Huang: School of Materials Science and Engineering, Xi'an Petroleum University, Xi'an 710065, China
Yu Wang: School of Materials Science and Engineering, Xi'an Petroleum University, Xi'an 710065, China
Xiao Yong Zhang: School of Materials Science and Engineering, Xi'an Petroleum University, Xi'an 710065, China

Surface Review and Letters (SRL), 2011, vol. 18, issue 03n04, 141-146

Abstract: Different aluminide coatings were prepared on oil casing steelN80at a relatively lower temperature of 530°C for 2 h by pack powder modified with different content of zinc (Zn). The cross-sectional microstructure, element distribution and properties of as-aluminized oil casing steelN80were investigated by SEM, EDS, micro-hardness test and electrochemical corrosion measurement. Results show that aluminide coating with around 50 μm in thickness can be successfully achieved by a low-temperature pack aluminizing processing with the addition ofZn.Znin the pack powder can enhance the uniformity and continuity of the coating layer, while it has little effect on the thickness of as-packed coating with the increasing content ofZnfrom 38.8 wt.% to 84.4 wt.%. As the content ofZnis over 58.8 wt.%, two layer coating consisting of pureZnlayer andFe–Alaluminide layer can be formed on oil casing steelN80substrate. Furthermore, oil casing steelN80with aluminizing coating shows a higher microhardness than that of original one except in the depth range of pureZnlayer, but the microhardness of oil casing steel substrate does not decrease after aluminizing which can be inferred that low-temperature aluminizing processing reported here will not bring any damages on the mechanical properties of oil casing steelN80. Additionally, a lower self-corrosion current density of oil casing steelN80with aluminizing coating also indicates that low-temperature aluminizing processing is helpful to the corrosion resistance of oil casing steelN80.

Keywords: Oil casing steelN80; low-temperature aluminizing with addition ofZn; microstructure; mircrohardness; corrosion resistance (search for similar items in EconPapers)
Date: 2011
References: View complete reference list from CitEc
Citations:

Downloads: (external link)
http://www.worldscientific.com/doi/abs/10.1142/S0218625X11014588
Access to full text is restricted to subscribers

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:wsi:srlxxx:v:18:y:2011:i:03n04:n:s0218625x11014588

Ordering information: This journal article can be ordered from

DOI: 10.1142/S0218625X11014588

Access Statistics for this article

Surface Review and Letters (SRL) is currently edited by S Y Tong

More articles in Surface Review and Letters (SRL) from World Scientific Publishing Co. Pte. Ltd.
Bibliographic data for series maintained by Tai Tone Lim ().