Metal based nano composite electric plating method for Nd-Fe-B material antisepsis

Abstract

The invention discloses a metal based nanometer composite plating method of corrosion resistance Nd-Fe-B material, which is characterized by the following: removing oil for Nd-Fe-B working piece through ultrasound; brightening through dilute HNO3 solution; bleaching through clear water; placing in the composite nanometer plating groove to plate semi-light nickel; stripping film through electrolyzing; proceeding bright plating.

Description

technical field

[0001] The invention belongs to the technical field of chemical surface treatment, and in particular relates to a nanocomposite electroplating method using metals such as nickel, zinc, copper, and nickel-cobalt alloys, nickel-iron alloys, and nickel-phosphorus alloys as metal bases. Background technique

[0002] Neodymium in Nd-Fe-B permanent magnets is a rare earth element with strong chemical activity. It is easily oxidized in the air and has poor corrosion resistance. In particular, Nd-Fe-B magnets have neodymium-rich phases, which are prone to intergranular Corrosion, when it is serious, a large amount of neodymium oxides and hydrides are formed to pulverize the material; secondly, most of these magnetic materials are prepared by sintering method, the surface is porous, brittle and loose in structure, so this kind of material must be specially treated Surface anti-corrosion treatment.

[0003] So far, for the surface treatment method of Nd-Fe-B permanent...