POWDER MAGNETIC CORE, ELECTROMAGNETIC COMPONENT, AND MANUFACTURING METHOD OF POWDER MAGNETIC CORE

摘要

PROBLEM TO BE SOLVED: To provide a powder magnetic core including soft magnetic particles and exhibiting excellent corrosion resistance.SOLUTION: A powder magnetic core comprises: a compact containing multiple coated soft magnetic particles produced by coating the surface of soft magnetic particles with an insulating layer; and a rustproof layer for rustproofing the compact by covering the entire surface thereof. The rustproof layer contains a resin, and multiple metal pieces dispersed into the resin. The powder magnetic core has excellent corrosion resistance because it includes a rustproof layer. Since the metal pieces themselves in the resin divide a pinhole extending in the thickness direction of the rustproof layer, a rustproof layer having very small number of pinholes or not having any pinhole can be obtained.