Neodymium iron boron magnet with good corrosion resistance

Abstract

The invention discloses a neodymium iron boron magnet with good corrosion resistance, comprising a base, wherein a supporting column is fixedly connected to an upper surface of the base, fixing platesare fixedly connected to left and right side faces of the supporting column, through holes are formed in the upper surfaces of the fixing plates, a fixing hole is formed in the upper surface of the base, a fixing rod is arranged in the fixing hole, the fixing rod is clamped in the fixing hole, the fixing rod passes through the through holes and extends into the fixing hole, a first magnet block is fixedly connected to an inner bottom wall of the fixing hole, a second magnet block is fixedly connected to a bottom surface of the fixing rod, a neodymium iron boron magnet is placed on the upper surface of the supporting column, and a galvanized layer is arranged on an outer surface of the neodymium iron boron magnet. The neodymium iron boron magnet disclosed by the invention has a reasonabledesign structure, an anti-corrosion effect of the neodymium iron boron magnet can be achieved by electroplating a nickeled layer and the galvanized layer, so that the protectiveness of the neodymium iron boron magnet is improved, and the galvanized layer improves the corrosion resistance of the neodymium iron boron magnet.

Description

technical field [0001] The invention relates to the technical field of neodymium-iron-boron magnets, in particular to a neodymium-iron-boron magnet with good corrosion resistance. Background technique [0002] NdFeB is divided into sintered NdFeB and bonded NdFeB. Bonded NdFeB magnets are magnetic in all directions and corrosion-resistant, while sintered NdFeB magnets are easy to corrode, and the surface needs to be coated. NdFeB magnets are Tetragonal crystals formed by neodymium, iron and boron. The magnetic energy product of this magnet is greater than that of samarium-cobalt magnets, and it was the material with the largest magnetic energy product in the world at that time. Later, Sumitomo Special Metals successfully developed powder metallurgy, and General Motors successfully developed The spin spray smelting method can produce NdFeB magnets, which are permanent magnets second only to absolute zero holmium magnets, and are also the most commonly used rare earth magnets....

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Problems solved by technology

[0003] At present, in order to avoid the corrosion damage of sintered NdFeB, it is necessary to do protective treatment on the surface of permanent magnet materials during use, such as electroplating with gold, nickel, zinc and tin, and spraying epoxy resin on the surface. Iron-boron magnets, but the existing corrosion fixation of NdFeB magnets is not up to the standard, which is easy to cause corrosion damage to NdFeB magnets and waste resources. Therefore, we propose a NdFeB magnet with good corrosion resistance magnet

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