2015-Sustainable Industrial Processing Summit
SIPS 2015 Volume 8: Composite & Ceramic, Quasi-crystals and Nanomaterials
| Editors: | Kongoli F, Pech-Canul M, Kalemtas A, Werheit H |
| Publisher: | Flogen Star OUTREACH |
| Publication Year: | 2015 |
| Pages: | 300 pages |
| ISBN: | 978-1-987820-31-7 |
| ISSN: | 2291-1227 (Metals and Materials Processing in a Clean Environment Series) |
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Peculiarities of the Corrosion Properties and Magnetic Characteristics of Stainless Steels
Kazimir Yanushkevich1; Olga Demidenko1; Ana-Maria Julieta Popescu2; Virgil Constantin3; Elena Ionela Neacsu3; Cristina Donath2;1SCIENTIFIC-PRACTICAL MATERIALS RESEARCH CENTER NAS OF BELARUS, Minsk, Belarus; 2ILIE MURGULESCU INSTITUTE OF PHYSICAL CHEMISTRY, LABORATORY OF MOLTEN SALTS, Bucharest, Romania; 3ILIE MURGULESCU INSTITUTE OF PHYSICAL CHEMISTRY, Bucharest, Romania;
Type of Paper: Regular
Id Paper: 125
Topic: 8
Abstract:
The aim of this paper is to study the corrosion action processes on the surface morphology, crystal structure and magnetic characteristics changes of various grades of stainless steel. Corrosion studies were carried out on inox (W1.4783) and inocorr (W1.4781) steels by potentiodynamic method in solutions of CHCl-Urea, ChCl-EG and ChCl-AOx at T ~ 380 K. The crystal structure was studied in CuK(alfa) - radiation in the 3 <= 2Tetta <=150 angles range at room temperature. The specific magnetization was investigated by ponderomotive method in non-destructive regime in the 80 - 1100 K temperature range. The elemental composition, elements distribution maps, coatings surface images are obtained using X-ray microanalyzer JXA 8100 with energy-prefix INCA, a scanning electron microscope of high resolution Hitachi S5500. It is found that when we use corrosive action, it generally does not affect the crystal structure of the stainless steel. The structure and magnetic properties changes of the surface steel layers are determined not only by the characteristics of corrosion media. The surface of W1.4873 steel is relatively resistant to composition ChCl-EG but weak-stable to the expose of ChCl-urea ionic liquid and especially to ChCl-AOx. Corrosive action to W.14781 steel has practically no effect on the specific magnetization value and Curie temperature, while greatly reducing the magnetization of W.14783 steel at a temperature ~ 80 K from 12 A*m2*kg-1 to 5 A*m2*kg-1 and the Curie temperature by 30 K. The images obtained using an electron microscope show that in the initial state a steel surface comprises defects, which become corrosion centers. The results of the study of the specific magnetization temperature dependences indicate that the magnetic properties of steels with a high content of nickel are more resistant to corrosion.
Keywords:
Alloys; Magnetism; Materials;References:
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