Documents disponibles écrits par cet auteur

Erosion–corrosion characteristic of nano-particulates reinforced Ni–Cr–Mo–Cu surface alloying layer in acidic flow and acidic slurry flow / J. Xu in Materials and corrosion, Vol. 61 N° 1 (Janvier 2010) 

Public ISBD [article]  in Materials and corrosion > Vol. 61 N° 1 (Janvier 2010) . - pp. 7–15 Titre : Erosion–corrosion characteristic of nano-particulates reinforced Ni–Cr–Mo–Cu surface alloying layer in acidic flow and acidic slurry flow Type de document : texte imprimé Auteurs : J. Xu, Auteur ; C. Zhuo, Auteur Année de publication : 2010 Article en page(s) : pp. 7–15 Note générale : Génie mécanique Langues : Anglais (eng) Mots-clés : Composite  alloying  layer;  EIS;  erosion–corrosion  behavior;  nano-particle  reinforced;  potentiodynamic  polarization Résumé : In order to improve the corrosion and erosion–corrosion resistance of 316L stainless steel in engineering application, two kinds of composite alloying layers were prepared by a duplex treatment, consisting of Ni/nano-SiC and Ni/nano-SiO2 predeposited by brush plating, respectively, and a subsequent surface alloying with Ni–Cr–Mo–Cu by double glow process. Potentiodynamic polarization and electrochemical impedance spectroscopy (EIS) were performed on the two kinds of composite alloying layer using 10 wt% HCl solution to assess the corrosion behavior. Erosion–corrosion tests were carried out by erosion–corrosion test rig in acidic flow and acidic slurry flow for test time of 20 h at four different rotational speeds. Results of electrochemical tests indicated that the corrosion resistance of composite alloying layer with brush plating Ni/nano-SiO2 particles interlayer approximated to that of single Ni-based alloying layer, whereas the corrosion resistance of the composite alloying layer with brush plating Ni/nano-SiC particles interlayer was apparently inferior to that of Ni-based alloying layer in 10 wt% HCl solution at static state. Under the conditions of acidic flow and acidic slurry flow, the mass losses of tested samples increased with increase in the time of erosion–corrosion tests and the rotational speeds of samples. The mass losses of composite alloying layer with brush plating Ni/nano-SiO2 particles interlayer were lower than that of single Ni-based alloying layer at all rotational speeds, except at 1.88 m/s in acidic flow. The mass losses of composite alloying layer with brush plating Ni/nano-SiC particles interlayer were higher than that of single Ni-based alloying layer at all rotational speeds, but were obviously lower than that of AISI 316L stainless steel. The influences of second phase on the corrosion and erosion–corrosion of the two kinds of composite alloying layer were discussed in this paper. En ligne : http://onlinelibrary.wiley.com/doi/10.1002/maco.200905235/abstract [article] Erosion–corrosion characteristic of nano-particulates reinforced Ni–Cr–Mo–Cu surface alloying layer in acidic flow and acidic slurry flow [texte imprimé] / J. Xu, Auteur ; C. Zhuo, Auteur . - 2010 . - pp. 7–15. Génie mécanique Langues : Anglais (eng) in Materials and corrosion > Vol. 61 N° 1 (Janvier 2010) . - pp. 7–15 Mots-clés : Composite  alloying  layer;  EIS;  erosion–corrosion  behavior;  nano-particle  reinforced;  potentiodynamic  polarization Résumé : In order to improve the corrosion and erosion–corrosion resistance of 316L stainless steel in engineering application, two kinds of composite alloying layers were prepared by a duplex treatment, consisting of Ni/nano-SiC and Ni/nano-SiO2 predeposited by brush plating, respectively, and a subsequent surface alloying with Ni–Cr–Mo–Cu by double glow process. Potentiodynamic polarization and electrochemical impedance spectroscopy (EIS) were performed on the two kinds of composite alloying layer using 10 wt% HCl solution to assess the corrosion behavior. Erosion–corrosion tests were carried out by erosion–corrosion test rig in acidic flow and acidic slurry flow for test time of 20 h at four different rotational speeds. Results of electrochemical tests indicated that the corrosion resistance of composite alloying layer with brush plating Ni/nano-SiO2 particles interlayer approximated to that of single Ni-based alloying layer, whereas the corrosion resistance of the composite alloying layer with brush plating Ni/nano-SiC particles interlayer was apparently inferior to that of Ni-based alloying layer in 10 wt% HCl solution at static state. Under the conditions of acidic flow and acidic slurry flow, the mass losses of tested samples increased with increase in the time of erosion–corrosion tests and the rotational speeds of samples. The mass losses of composite alloying layer with brush plating Ni/nano-SiO2 particles interlayer were lower than that of single Ni-based alloying layer at all rotational speeds, except at 1.88 m/s in acidic flow. The mass losses of composite alloying layer with brush plating Ni/nano-SiC particles interlayer were higher than that of single Ni-based alloying layer at all rotational speeds, but were obviously lower than that of AISI 316L stainless steel. The influences of second phase on the corrosion and erosion–corrosion of the two kinds of composite alloying layer were discussed in this paper. En ligne : http://onlinelibrary.wiley.com/doi/10.1002/maco.200905235/abstract