Assessment of corrosion resistance in liquid media of FeAl intermetallic phase based alloys with varied aluminium content

• Autorzy: Cebulski J. , Michalik R. , Lalik S.
• Języki publikacji: EN

Abstrakty

EN

Purpose: The paper presented results of corrosion resistance investigations with FeAl intermetallic phase matrix and different aluminium content (38%, 40% and 42%). Design/methodology/approach: In the corrosion research electrolyser, potentiostat „Solartron 1285” and computer with „CorrWare 2” software were used. Results of the research were worked out with „CorrView” software. The potential’s values were determined in relation to normal hydrogen electrode (NEW). The temperature of the solutions was kept on 21ºC level. The recording of potential/density of current - time curve was conducted for 300 s. Sample polarization ranges from potential smaller by 300 mV from normal potential to 0 mV in case of the test in 0.2% HCl solution as well as to 1500 mV in case of 3% H2SO4 solution. Rate of changing the potential amounted 10 mV/min in each case. Observations of the surface state were conducted using scanning electron microscope (JSM – 35) with magnifications from 30 to 1000. Findings: The results were showed that electrochemical corrosion conducted in 0,2% HCl and 3% H2SO4solution depend on aluminium content. The best electrochemical corrosion resistance in 0.2%HCl have samples of Fe-38Al intermetallic phase based alloy and in 3% H2SO4 have Fe-40Al. It was confirmed by the lowest value of corrosion current density, low value of passive current density, pitting corrosion resistance much higher than in other samples. Research limitations/implications: The results of potentiodynamic research of alloy examined in 0.2% HCl solution are presented in table 1, these for 3% H2SO4 in table 2. Results of the potentiostatic and galvanostatic tests are presented in table 3. In figures 1, 2 the potentiodynamic curve are presented. Table 4 presents results of the surface state after corrosion tests. Figures 3 - 8 present surface state of the samples after corrosion research, which was observed using the scanning electron microscope. Originality/value: Corrosion resistance in liquid media of FeAl intermetallic phase.

Słowa kluczowe

EN

corrosion; metallic alloys; intermetallic phase

PL

korozja; stopy metali; faza międzymetaliczna

• Wydawca: International OCSCO World Press
• Czasopismo: Journal of Achievements in Materials and Manufacturing Engineering
• Rocznik: 2006
• Tom: Vol. 16, nr 1-2
• Strony: 40--45
• Opis fizyczny: Bibliogr. 17 poz., rys., tab., wykr.

Twórcy

autor

Cebulski J.

• Department of Material Science, Silesian University of Technology, ul.Krasińskiego 8, 40-019 Katowice, Poland

autor

Michalik R.

• Department of Material Science, Silesian University of Technology, ul.Krasińskiego 8, 40-019 Katowice, Poland

autor

Lalik S.

• Department of Material Science, Silesian University of Technology, ul.Krasińskiego 8, 40-019 Katowice, Poland

Bibliografia

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