EFFECT OF DIFFUSION PROCESS ON COATING IN HOT-DIPPED ALUMINIZED STEEL

Yuwen Ding, Xiaochun Chen, Ya Liu and Xuping Su
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Yuwen Ding: Jiangsu Key Laboratory of Materials Surface Science and Technology, Changzhou University 213164 Jiangsu, P. R. China2Jiangsu Collaborative Innovation Center of Photovolatic Science and Engineering, Changzhou University 213164 Jiangsu, P. R. China
Xiaochun Chen: Jiangsu Key Laboratory of Materials Surface Science and Technology, Changzhou University 213164 Jiangsu, P. R. China2Jiangsu Collaborative Innovation Center of Photovolatic Science and Engineering, Changzhou University 213164 Jiangsu, P. R. China
Ya Liu: Jiangsu Key Laboratory of Materials Surface Science and Technology, Changzhou University 213164 Jiangsu, P. R. China2Jiangsu Collaborative Innovation Center of Photovolatic Science and Engineering, Changzhou University 213164 Jiangsu, P. R. China
Xuping Su: Jiangsu Key Laboratory of Materials Surface Science and Technology, Changzhou University 213164 Jiangsu, P. R. China2Jiangsu Collaborative Innovation Center of Photovolatic Science and Engineering, Changzhou University 213164 Jiangsu, P. R. China

Surface Review and Letters (SRL), 2019, vol. 26, issue 10, 1-9

Abstract: Aluminized steels possess excellent corrosion resistance due to the formation of Al-Fe solution phases and intermetallic compounds in coatings. Ni was added to baths to further improve the corrosion resistance of the coatings at high temperature. Here, the role of Ni in the formation of coatings and the effect of diffusion process on the developing of coatings were investigated. 45 steels were immersed in Al-Ni baths (Al-1mass% Ni, Al-3mass% Ni, and Al-5mass% Ni) and diffusion-treated at 1023 and 1123K for 20, 40 and 100min, respectively. The coatings of samples were analyzed via scanning electron microscopy (SEM) along with energy-dispersive X-ray spectroscopy (EDS). X-ray diffraction (XRD) was further used to confirm the types of phases that formed during diffusion treatment. The formations of intermetallic coating layers were also analyzed via the diffusion path. More continuous Al3Ni layer and compact coating were obtained with diffusion treatment at 1023K for 40min.

Keywords: Aluminized steel; element Ni; diffusion treatment; SEM; XRD; diffusion path (search for similar items in EconPapers)
Date: 2019
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DOI: 10.1142/S0218625X19500707

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