Influence of H2S on degradation of 9Cr-1Mo steel in advanced stage of metal dusting process

• Autorzy: Dampc J. , Grzesik Z. , Hucińska J.
• Języki publikacji: EN

Abstrakty

EN

Samples of 9Cr-1Mo steel in an advanced stage of metal dusting after 10 years' service in CCR platforming unit have been under studies to consider a decision about dosage of a sulphur compound to the feed to stop degradation process of the steel. Effects of long-term exposure of the samples in a mixture of H2-H2S at 600°C have been examined. The examinations revealed that the exposure results in some unfavourable processes: diffusion of sulphur into the subsurface layer of the steel, formation of sulphide scale and diffusion of carbon in front of sulphur inside the steel.

Słowa kluczowe

EN

CCR platforming unit; 9Cr-1Mo steel; metal dusting; sulphur

• Wydawca: Politechnika Gdańska
• Czasopismo: Advances in Materials Science
• Rocznik: 2007
• Tom: Vol. 7, nr 2(12)
• Strony: 7--12
• Opis fizyczny: Bibliogr. 9 poz., rys., tab.

Twórcy

autor

Dampc J.

autor

Grzesik Z.

autor

Hucińska J.

• Lotos Group SA Gdańsk, Poland

Bibliografia

• [1] Grabke H.J., Krajak R., Müller-Lorenz E.M.: Metal dusting of high temperature alloys. Materials and Corrosion 44 (1993), pp. 89-97.
• [2] Grabke H.J.: Thermodynamics, mechanisms and kinetics of metal dusting. Materials and Corrosion 49 (1998), pp. 303-308.
• [3] Grabke H.J., Spiegel M.: Occurrence of metal dusting - referring to failure cases. Materials and Corrosion 54 (2003), pp. 799-804.
• [4] Hochman RF.: Catastrophic deterioration of high temperature alloys in carbonaceous atmospheres. Proc. Symp. Properties of High Temperature Alloys. The Electrochemical Society (1976), pp.715-732.
• [5] Grabke H.J., Bracho-Troconis C.B., Müller-Lorenz E.M.: Metal dusting of law alloy steels. Materials and Corrosion 45 (1994), pp.215-221.
• [6] Pippel E.,Woltersdorf J., Schneider R.: Micromechanisms of metal dusting on Fe-base and Ni-base alloys. Materials and Corrosion 49 (1998), pp. 309-316.
• [7] Chun C.M., Ramanarayanan TA.: Metal-dusting corrosion of low-chromium steels. Oxidation of Metals 62 (2004), pp. 71-92.
• [8] Grabke R.J., Gerk C.: Effects of temperature and of hydrogen sulphide and trichloroethylene additions in the metal dusting by hydrocarbons. European Corrosion Congress Eurocorr'99, Aachen, Germany, Dechema 1999.
• [9] Hucińska J., Dampc: Pylenie metalu w środowisku rafineryjnym. Materiały i Technologie 4 (1), 2006, pp.100-106.