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1 Journal of Achievements in Materials and Manufacturing Engineering
1 Prace Naukowe Instytutu Technologii Nieorganicznej i Nawozów Mineralnych Politechniki Wrocławskiej. Konferencje

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The kinetics of corrosion of the FeAl intermetallic phase-based alloys

Cebulski J., Fornalczyk A., Pasek D.

Journal of Achievements in Materials and Manufacturing Engineering

2015

Vol. 70, nr 2

53--59

Purpose:Purpose alloys on intermetallic phase matrix of iron and aluminium are considered the future materials for high-temperature applications as they are highly resistant to oxidation. Oxidized intermetallic alloy FeAl forms a protective alumina layer. The paper presents results of tests concerning kinetics of corrosion processes of alloy on intermetallic phase matrix FeAl of the composition Fe40Al5CrTiB after casting and plastic treatment with the use of co-extrusion method. The aim of this paper was to determine the resistance to high-temperature corrosion in atmosphere of air for alloy Fe40Al5Cr0.2TiB. Design/methodology/approach: Corrosion tests were conducted in temperatures 900, 950 and 1000°C in time 8 hours, kinetics of corrosion appointed on the thermogravimetry method. The condition of the surface of samples after tests was characterized with the use of electron scanning microscope and also the chemical composition of corrosion products was determined. Findings: Conducted tests have shown a high corrosion resistant alloy Fe40Al5CrTiB in comparison. The resulting graphs show the kinetics of corrosion processes on the parabolic character of the process of creating high-temperature corrosion products. Practical implications: The Al alloy have a high corrosion resistant with resistant conventional materials predestined to do work in high temperature in corrosion environment. Originality/value: The aim of this paper was to determine the resistance to high-temperature corrosion in atmosphere of air for alloy Fe40Al5Cr0.2TiB.

Wykorzystanie metod elektrochemicznych DC i AC do określania szybkości korozji metali w warunkach polaryzacji katodowej

Jankowski J.

Prace Naukowe Instytutu Technologii Nieorganicznej i Nawozów Mineralnych Politechniki Wrocławskiej. Konferencje

1998

Vol. 46, nr 27

155-166

Przedstawiono przegląd dotychczasowych badań w zakresie wykorzystywania metod elektrochemicznych DC i AC do kontroli szybkości korozji układów polaryzowanych katodowo prezentując jednocześnie na tym tle prace prowadzone ostatnio w Politechnice Gdańskiej. Opisano próby wykorzystania metod zmiennoprądowych - elektrochemicznej spektroskopii impedancyjnej (EIS) i analizy harmonicznej (HA) do wyznaczania cząstkowego prądu anodowego chronionej katodowo stali w środowisku wody i gruntu.

A review of the investigations which have been done up to the present for application of DC and AC electrochemical methods for measurements of corrosion rate in cathodically polarized systems is described. The methods elaborated recently in the Technical University of Gdańsk are presented. The attempts of using AC methods electrochemical impedance spectroscopy (EIS) and harmonic analysis are described for determination of the partial anodic current of cathodically protected steel in water and soil.