| 摘要 |
PURPOSE: A surface treatment method of ferrite based fastening member is provided to carry out surface treatment of a ferrite based fastening member by using a principle of sping that is capable of preventing corrosion phenomenon semi-permanently by basically inhibiting the corrosion phenomenon caused by electrical potential difference of ferrite materials. CONSTITUTION: A surface treatment method of ferrite based fastening members is characterized in that: composite ceramic of 1 to 60 weight percent, which is comprised of at least one element selected from a group of a typical polymer resin and silicon oxide, magnesium oxide, zinc oxide, talc, silver compounds, carbon black, pigment, ethyl acetate, sodium athyl sulfonate, and compounds thereof is mixed into coating liquid; a ferrite based fastening member is dipped into the coating liquid one or more times by using a sping coating machine(10); and then the fastening member is coated with multi-layered thin film. Any ferrite based fastening members such as a bolt, a nut, a piece, a rivet, and the like treated according to the method may have improved corrosion resistance, electrical corrosion preventive capability, chemical resistance, and heat resistance.
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