Corrosion of Nd-Fe-B permanent magnets

• Autorzy: Drak, M. , Dobrzański, L. A.
• Konferencja: 12th International Scientific Conference CAM3S'2006, 27-30th November 2006, Gliwice-Zakopane
• Języki publikacji: EN

Abstrakty

EN

Purpose: purpose of the paper is to presents results of corrosion wear of bonded and sintered hard magnetic materials Nd-Fe-B and magnets covered by protective polymer, lacquer and metal coatings. Design/methodology/approach: Corrosion tests were made in two corrosive environments in water and in 5% NaCl solution. Findings: It was found that the bonded magnets with the polymer matrix demonstrate better corrosion resistance than the sintered magnets. Employment of the protective coatings on the Nd-Fe-B bonded magnets surfaces may feature the effective protection of the substrate material from the corrosive action of the aggressive agent. Practical implications: Magnets covered by protective polymer, lacquer or metal coating are less susceptible to corrosion so employment of these coatings can lower the losses caused by the corrosion of magnets. Corrosion protection of Nd-Fe-B magnets needs further investigations. Originality/value: Analysis of the surface topography of the deposited protective coatings makes it possible to determine coating defects resulting from the action of the aggressive agent. The obtained results can be use in practice to decrease the corrosion wear of these materials.

Słowa kluczowe

PL

korozja; kompozyty; materiały magnetyczne

EN

corrosion; composites; magnetic materials

• Czasopismo: Journal of Achievements in Materials and Manufacturing Engineering
• Rocznik: 2007
• Tom: Vol. 20, nr 1-2
• Strony: 239-242
• Opis fizyczny: Bibliogr. 15 poz., fot., tab.

Twórcy

autor

Drak, M.

autor

Dobrzański, L. A.

• Division of Materials Processing Technology, Management and Computer Techniques in Materials Science, Institute of Engineering Materials and Biomaterials, Silesian University of Technology, ul. Konarskiego 18 a, 44-100 Gliwice, Poland

Bibliografia

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• [3] B. Ślusarek, Dielektromagnets NdFeB, Wrocław, 2001 (in Polish).
• [4] C. Gaona-Tiburcio, F. Almeraya-Carderon, J.G. Chacon-Nava, J.A. Matutes-Aquino, A. Martinez-Villafane, Electrochemical response of permanent magnets in different solutions, Journal of Alloys and Compounds, 369 (2004) 78-80.
• [5] A.A. El-Moneim, Passivity and its breakdown of sintered NdFeB-based magnets in chloride containing solution, Corrosion Science, 46 (2004) 2517-2532.
• [6] A. Costa, M.C.L. Oliveira, H. Takiishi, M. Saiki, R.N. Faria, Key Engineering Materials, 189-191 (2001) 340-344.
• [7] L.A. Dobrzański, M. Drak, Structure and properties of composite materials with polymer matrix reinforced NdFeB hard magnetic nanostructured particles, Journal of Materials Processing and Technology, 157-158 (2004) 650-657.
• [8] L.A. Dobrzański, M. Drak, Corrosion resistance of the polymer matrix hard magnetic composite materials Nd-Fe-B, Journal of Materials Processing and Technology, 164-165 (2005) 795-804.
• [9] M. Drak, Structure and application properties of polymer matrix hard magnetic composite materials reinforced with Nd-Fe-B nanocrystalline particles with metal addition, PhD thesis - unpublished, Main Library of the Silesian University of Technology, Gliwice 2004 (in Polish).
• [10] L.A. Dobrzański, M. Drak, Permanent magnets Nd-Fe-B, 11th International Scientific Conference on the Contemporary Achievements in Mechanics, Manufacturing and Materials Science CAM3S'2005, Gliwice-Zakopane, (2005) 193-201.
• [11] L.A. Dobrzański, M. Drak, Properties of composite materials with polymer matrix reinforced with Nd-Fe-B hard magnetic particles, Journal of Materials Processing Technology 175 (2006) 149-156.
• [12] L.A. Dobrzański, M. Drak, Corrosion resistance of hard magnetic composite materials Nd-Fe-B, Materials Engineering, 3 (2005) 95-99.
• [13] L.A. Dobrzański, M. Drak, Protective coatings deposited on hard magnetic composite materials Nd-Fe-B, nanoSMat 2005 International Conference on Surfaces, Coatings and Nanostructured Materials Portugal, (2005) 100-102.
• [14] L.A. Dobrzański, M. Drak, B. Ziębowicz, New possibilities of composite materials application - materials of specific magnetic properties, Proceedings of Advances in Materials and Processing Technologies (AMPT), (2006) 186- 198.
• [15] L.A. Dobrzański, M. Drak, B. Ziębowicz, Materials with specific magnetic properties, Journal of Achievements in Materials and Manufacturing Engineering, 17 (2006) 37-40.