Structural and Corrosion Properties of Al-Zn Protective Coating for Nd-Fe-B Permanent Magnets

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61989100%3A27360%2F11%3A86081144" target="_blank" >RIV/61989100:27360/11:86081144 - isvavai.cz</a>

Result on the web

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DOI - Digital Object Identifier

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Result language

angličtina

Original language name

Structural and Corrosion Properties of Al-Zn Protective Coating for Nd-Fe-B Permanent Magnets

Original language description

The low corrosion resistance of Nd-Fe-B magnets in humid environments determines the necessity for their protection with anticorrosive coatings. In the present work, the microstructure and compositions of Nd-Fe-B-based magnet produced by powder-metallurgy and Al-Zn protective coating applied by cold gas-dynamic sputtering on the magnet surface were studied by optical and electron microscopy and EDS microanalysis. The base material was formed by sintered (polyhedron) grains of the principal Nd2Fe14B phase and it contains pores and minority phases. The fractographic analysis confirmed intercrystalline brittle fracture. The distribution of elements along the coating thickness was studied by glow-discharge spectroscopy. On the basis of potentiodynamic polarization method, the corrosion parameters of stated materials, commercially zinc-coated steel, zinc and aluminium were determined and compared, especially with respect to pitting corrosion in NaCl water solution. Protective coatings were

Czech name

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Czech description

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Type

J_x - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)

CEP classification

JG - Metallurgy, metal materials

OECD FORD branch

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Project

<a href="/en/project/ED0040%2F01%2F01" target="_blank" >ED0040/01/01: Regional materials science and technology centre</a><br>

Continuities

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year

2011

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Hutnické listy

ISSN

0018-8069

e-ISSN

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Volume of the periodical

64

Issue of the periodical within the volume

3

Country of publishing house

CZ - CZECH REPUBLIC

Number of pages

7

Pages from-to

59-65

UT code for WoS article

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EID of the result in the Scopus database

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