论文信息 - Na2SO4 Induced Hot Corrosion of Aluminized Low Carbon Steel at 700 °C

Na2SO4 Induced Hot Corrosion of Aluminized Low Carbon Steel at 700 °C

The oxidation kinetics of hot-dip aluminized AISI 1020 steel with Na2SO4 deposit was investigated at 700 °C for 49 h in static air. The scale morphologies were observed by means of metallograpy, scanning electron miscroscopy (SEM), electron dispersive spectroscopy (EDS) and X-ray analyses. The accelerated oxidation of aluminized steel was attributed to the formation of aluminum-sulphides which allowed the rapid diffusion of Fe ions in the aluminide layer to the formation of iron oxide. In addition, the Al-sulphides precipitations in the alumina scale causes the Al-depletion such that Al2O3 layer fails to form a protective layer. Consequently, the kinetics rate of aluminized was increased.

Mohammad Badaruddin

[1] H. Singh,et al. AN OVERVIEW OF Na 2 SO 4 AND/OR V 2 O 5 INDUCED HOT CORROSION OF Fe- AND Ni-BASED SUPERALLOYS , 2007 .

[2] Yanchun Zhou,et al. Effect of Na2SO4 and Water Vapor on the Corrosion of Ti3SiC2 , 2006 .

[3] Liangquan Shi. Accelerated oxidation of iron induced by Na2SO4 deposits in oxygen at 750°C—A new type low-temperature hot corrosion , 1993 .

[4] S. Nešić,et al. Corrosion Of Mild Steel In The Presence Of Elemental Sulfur , 2008 .

[5] Y. Niu,et al. The corrosion of Ni3Al in a combustion gas with and without Na2SO4-NaCl deposits at 600–800°C , 1994 .

[6] J. Stringer,et al. Mechanisms of Na2SO4-induced accelerated oxidation , 1975 .

[7] Y.-h. Su,et al. The Hot Corrosion of Fe-Mn-Al–C Alloy with NaCl/Na2SO4 Coating Mixtures at 750°C , 2003 .

[8] Chaur-Jeng Wang,et al. The oxidation of MAR M247 superalloy with Na2SO4 coating , 2002 .