Electroless Ni-Co-P Coatings on Sintered Nd-Fe-B Magnets with Improved Corrosion Resistance

Tian Yu Ma; Hua Gen Ying; Mi Yan

doi:10.4028/www.scientific.net/AMR.75.53

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Electroless Ni-Co-P Coatings on Sintered Nd-Fe-B Magnets with Improved Corrosion Resistance
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Study on the Pretreatment Process for Nickel Coating on Microspheres
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HomeAdvanced Materials ResearchAdvanced Materials Research Vol. 75Electroless Ni-Co-P Coatings on Sintered Nd-Fe-B...

Electroless Ni-Co-P Coatings on Sintered Nd-Fe-B Magnets with Improved Corrosion Resistance

Abstract:

Electroless Ni-Co-P coatings have been deposited on sintered Nd-Fe-B permanent magnets by optimizing the bath composition and operating conditions. The corrosion resistance of coated Nd-Fe-B magnets was significantly improved and corresponding corrosion current density Icorr in 3.5 wt. % NaCl solution decreased by two orders of magnitude. Coated with 12μm-thick Ni-Co-P, Nd-Fe-B magnets possessed slight reduction in magnetic properties, with a modest loss of remanence (Br) by 3.9 % and coercivity (iHC) by 4.5 %.

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Periodical:

Advanced Materials Research (Volume 75)

Pages:

53-56

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.75.53

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Online since:

June 2009

Authors:

Tian Yu Ma, Hua Gen Ying, Mi Yan

Keywords:

Corrosion Resistance, Electroless Plating (EP), NdFeB, Ni-Co-P

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