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A new steel with good low-temperature sulfuric acid dew point corrosion resistance / X. Q. Cheng in Materials and corrosion, Vol. 63 N° 7 (Juillet 2012) 

Public ISBD [article]  in Materials and corrosion > Vol. 63 N° 7 (Juillet 2012) . - pp. 598–606 Titre : A new steel with good low-temperature sulfuric acid dew point corrosion resistance Type de document : texte imprimé Auteurs : X. Q. Cheng, Auteur ; F. L. Sun, Auteur ; S. J. Lv, Auteur Année de publication : 2012 Article en page(s) : pp. 598–606 Note générale : Génie mécanique Langues : Anglais (eng) Mots-clés : Dew  point  corrosion;  electrochemical;  ferrous  metals  and  alloys;  scanning  electron  microscopy;  sulfuric  acid Résumé : In this work, new steels (1#, 2#, and 3#) were developed for low-temperature sulfuric acid dew point corrosion. The mass loss rate, macro- and micro-morphologies and compositions of corrosion products of new steels in 10, 30, and 50% H2SO4 solutions at its corresponding dew points were investigated by immersion test, scanning electron microscopy (SEM) and energy-dispersive spectrometry (EDS). The results indicated that mass loss rate of all the tested steels first strongly increased and then decreased as H2SO4 concentration increased, which reached maximum at 30%. Corrosion resistance of 2# steel is the best among all specimens due to its fine and homogeneous morphologies of corrosion products. The electrochemical corrosion properties of new steels in 10 and 30% H2SO4 solutions at its corresponding dew points were studied by potentiodynamic polarization and electrochemical impedance spectroscopy (EIS) techniques. The results demonstrated that corrosion resistance of 2# steel is the best among all the experimental samples due to its lowest corrosion current density and highest charge transfer resistance, which is consistent with the results obtained from immersion tests. En ligne : http://onlinelibrary.wiley.com/doi/10.1002/maco.201006046/abstract [article] A new steel with good low-temperature sulfuric acid dew point corrosion resistance [texte imprimé] / X. Q. Cheng, Auteur ; F. L. Sun, Auteur ; S. J. Lv, Auteur . - 2012 . - pp. 598–606. Génie mécanique Langues : Anglais (eng) in Materials and corrosion > Vol. 63 N° 7 (Juillet 2012) . - pp. 598–606 Mots-clés : Dew  point  corrosion;  electrochemical;  ferrous  metals  and  alloys;  scanning  electron  microscopy;  sulfuric  acid Résumé : In this work, new steels (1#, 2#, and 3#) were developed for low-temperature sulfuric acid dew point corrosion. The mass loss rate, macro- and micro-morphologies and compositions of corrosion products of new steels in 10, 30, and 50% H2SO4 solutions at its corresponding dew points were investigated by immersion test, scanning electron microscopy (SEM) and energy-dispersive spectrometry (EDS). The results indicated that mass loss rate of all the tested steels first strongly increased and then decreased as H2SO4 concentration increased, which reached maximum at 30%. Corrosion resistance of 2# steel is the best among all specimens due to its fine and homogeneous morphologies of corrosion products. The electrochemical corrosion properties of new steels in 10 and 30% H2SO4 solutions at its corresponding dew points were studied by potentiodynamic polarization and electrochemical impedance spectroscopy (EIS) techniques. The results demonstrated that corrosion resistance of 2# steel is the best among all the experimental samples due to its lowest corrosion current density and highest charge transfer resistance, which is consistent with the results obtained from immersion tests. En ligne : http://onlinelibrary.wiley.com/doi/10.1002/maco.201006046/abstract