Impact of iron powder pressing temperature on high-temperature corrosion of the obtained sinters

• Autorzy: Jaroń A. , Żurek Z. , Batys P.
• Języki publikacji: EN

Abstrakty

EN

The work presents the results of kinetic studies of the high-temperature oxidation process of metallic iron sinters obtained by a hotpressing method in an anaerobic atmosphere. The conducted studies for a model arrangement (iron) allow to determine the effect of conditions for obtaining metallic pressed materials on the course of a high-temperature corrosion process. What is more, iron oxide sinters characterized by an expanded surface disclosed by a morphological analysis of the resulting scales may be used as catalyst carriers or as input material for obtaining porous iron by reduction. Sinters intended for research were obtained in a device for one-axial hot-pressing of samples at a pressure of 8 MPa within the temperature range 600 – 900^oC in vacuum. The research into the kinetics of metallic sinters oxidation was carried out in the standard apparatus for high-temperature thermogravimetric studies using a continuous method with automatic recording of measurement within the temperature range 500 – 700^oC in synthetic air atmosphere. The dependence of oxidation kinetics of metallic sinters on a pressing temperature was determined. Morphology as well as the chemical and phase composition of the tested samples were described using the SEM/EDX and XRD methods.

Słowa kluczowe

EN

iron; porous sinters; one-axial pressing; oxidation kinetics; sinters morphology

PL

żelazo; spieki porowate; prasowanie jednoosiowe; kinetyka utleniania; morfologia spieków

• Wydawca: Komisja Odlewnictwa Polskiej Akademii Nauk Oddział w Katowicach
• Czasopismo: Archives of Foundry Engineering
• Rocznik: 2010
• Tom: Vol. 10, iss. 3 spec.
• Strony: 105--110
• Opis fizyczny: Bibliogr. 8 poz., il., wykr.

Twórcy

autor

Jaroń A.

• Cracow University of Technology, Faculty of Chemical Engineering and Technology, ul. Warszawska 24, 31-155 Krakow, Poland

autor

Żurek Z.

• Cracow University of Technology, Faculty of Chemical Engineering and Technology, ul. Warszawska 24, 31-155 Krakow, Poland

autor

Batys P.

• Cracow University of Technology, Faculty of Chemical Engineering and Technology, ul. Warszawska 24, 31-155 Krakow, Poland

Bibliografia

• [1] H. Bala, K.a Giza, I. Kukula, Determination of hydrogenation ability and exchange current of H2O/H2 system on hydrogen-absorbing metal alloys, J. of App. Electrochem. (2010) 40 791-797.
• [2] P. Los, A. Rami, A. Lasia, Hydrogen evolution reaction on Ni-Al electrodes, J. of App. Electrochem. (1993) 23 p.135-140.
• [3] Khanna A.S.: High Temperature Oxidation and corrosion, ASM International, (2002) 83.
• [4] S.D. Cramer, B.S. Covino Jr., ASM Handbook, Vol. 13 A, (2003) 93.
• [5] Jaroń A., Żurek Z., The morphology of the iron sinters obtained on the oxidation process, Czasopismo Techniczne. Chemia, z. 1-Ch/2004, Kraków 2004, 63-69 (in Polish).
• [6] Jaroń A., Żurek Z, Werber T., Receiving of porous iron sinters on the oxidation/reduction process, Ochrona przed korozją, 11s/A/2004, Szczyrk 2004, 39-42 (in Polish).
• [7] A. Jaroń, Z. Żurek, Properties of the powder electrode Fe/Ni in the process of electrochemical receiving hydrogen, WISNYK, Chmielnicki, Ukraina (2007) 131-135.
• [8] Y. Chen, W.Y.D. Yeun, Review of the High-Temperature Oxidation of Iron and Carbon Steels in Air or Oxygen, Oxidation of Metals (2009) 433-468.