A One-Step Pack Cementation Method for Preparing AlN/Aluminizing Coating with Good Corrosion Resistance

Abstract:

AlN/aluminizing coating with good corrosion resistance on carbon steel was prepared by one-step powder pack method. The phase compositions were analyzed by X-Ray diffraction spectrum (XRD). The cross-sections were investigated by scanning electron microscope (SEM) equipped with an energy dispersive X-ray spectrometer (EDS). According the analysis above, the appropriate powder formula and technological parameter were determined: 40 wt.% Al + 50 wt.%Al₂O₃ + 5 wt.% NH₄Cl + 5 wt.%CeO₂, heating from 800 °C and maintaining at 900 °C for 6 hours. The corrosion resistance of specimen with AlN/aluminizing coating were measured by electrochemical test. The electrochemical measurement suggested that the corrosion resistance property of carbon steel was remarkably improved by fabricating AlN/aluminizing film. The process of pack cementation method in this fabrication is very simple, low-cost and facile, which opens a promising and effective path for industrial applications for AlN/aluminizing coating on various metallic materials.

• Periodical: Solid State Phenomena (Volume 295)
• Pages: 3-8
• DOI: https://doi.org/10.4028/www.scientific.net/SSP.295.3
• Online since: August 2019
• Authors: Xiao Yan Wang*, Jiao Jiao Du, Zhong Wei Ma
• Keywords: AlN/Aluminizing, Coating, Corrosion, One-Step Method

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