Internal sulfidation of iron

Ross F. Boland; Owen F. Devereux

doi:10.1007/bf02811749

Internal sulfidation of iron

Metallurgical Transactions A ◽

10.1007/bf02811749 ◽

1979 ◽

Vol 10 (12) ◽

pp. 1959-1961

Author(s):

Ross F. Boland ◽

Owen F. Devereux

Keyword(s):

Internal Sulfidation

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A study of the mechanism of internal sulfidation-internal oxidation during hot corrosion of Ni-base alloys

Oxidation of Metals ◽

10.1007/bf00659270 ◽

1987 ◽

Vol 27 (5-6) ◽

pp. 253-265 ◽

Cited By ~ 21

Author(s):

Zhu Rizhang ◽

Guo Manjiou ◽

Zuo Yu

Keyword(s):

Internal Oxidation ◽

Hot Corrosion ◽

Internal Sulfidation

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Study on the Corrosion Resistance Behavior of Multi-Elements Alloy CoCrFeNiTi0.5

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.541-542.61 ◽

2014 ◽

Vol 541-542 ◽

pp. 61-68

Author(s):

Sheng Jiao Pang ◽

Ping Li ◽

Ting Ju Li ◽

Jie Zhao

Keyword(s):

Corrosion Resistance ◽

Oxide Scale ◽

Oxide Layer ◽

Good Adhesion ◽

Tube Material ◽

Protective Oxide ◽

Good Thermal Stability ◽

The Matrix ◽

Internal Sulfidation ◽

Melting Point Eutectic

Multi-elements alloy with good thermal stability is expected to serve as the superheater tube material of ultra-supercritical boiler and may suffer from hot corrosion under the coal-fired atmosphere. In this study, the corrosion resistance behavior of multi-elements alloy CoCrFeNiTi0.5 coated with alkali metal sulfates at 750°C is investigated systematically. The results showed the corrosion kinetics curves of the alloy followed a parabolic growth rate. The corrosion products, which consisted of volatile Na (CrO4) (SO4), (Fe,Ni) xSy, Cr/Ti oxide as well as compound oxides with spinel structure AB2O4, were found in the oxide scale and internal attack zone of the alloy. The oxide layer had good adhesion with the matrix at the beginning of corrosion. Prolonging corrosion time, the oxide layer in thickness increased and became loose as well as porous. The micro-pores generated in the interface between the oxide scale and matrix with the occurrence of the internal oxidation and internal sulfidation. In a word, the corrosion resistance behavior of multi-elements alloy CoCrFeNiTi0.5 at 750°C can be attributed to the formation of the protective oxide layers and to the basic fluxing in molten Na4SO4 induced by low melting point eutectic.

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