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An anti-corrosion surface treatment process

A surface treatment and anti-corrosion technology, which is applied in the coating process and coating of metal materials, can solve the problems of nano-sized particles that cannot be stabilized for a long time, the price of nano-sized particles is expensive, and the deposition of nano-sized particles, so as to facilitate continuous operation , reduce industrial costs, and achieve low particle size requirements

Active Publication Date: 2018-07-31
FUJIAN CHANGJIANG GOLDEN DRAGON RARE EARTH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] However, the above-mentioned method has the following defects: 1) the nano-sized particles need to be dispersed in the treatment liquid by means of a dispersant and physical stirring; 2) the dispersed nano-sized particles cannot be stable for a long time, and after a period of time, the nano-sized particles will 3) Nanoscale particles are expensive and difficult to promote in large quantities in industrial applications

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Examples

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Embodiment 1

[0033]Example 1 is the application of the technical solution of the present invention to the phosphating treatment of sintered NdFeB magnets. Since the methods of passivation treatment and sealing treatment are similar to those of phosphating treatment, those skilled in the art can refer to the following specific instructions for process adjustment, therefore, examples for passivation treatment and sealing treatment will not be given separately.

[0034] The pre-processing includes the following steps: 1) the volume of a × b × c (mm) to be processed is abc / 1000cm 3 Soak the sintered NdFeB magnet in the degreasing solution for 3-10 minutes, and then rinse it with water for 1-2 minutes; 2) Soak the sintered NdFeB magnet in the derusting solution for 30-180 seconds, and then rinse it with water for 3 times; The sintered NdFeB magnet is washed with ultrasonic water for 10s, then washed with deionized water for 3 times, and then placed in a surface conditioner for 30-120s; 4) Sieve...

Embodiment 2

[0040] Embodiment 2 is the application of the technical solution of the present invention to the phosphating treatment of sintered NdFeB magnets. The processing steps are basically the same as those in Embodiment 1, and only the differences will be described below.

[0041] Prepare nabc / 200cm in pre-processing 3 The zirconia granules are ready for use. At this time, the volume ratio of the zirconia granules to the magnet is 5:1.

[0042] as attached Figure 5 As shown, it is a schematic diagram of embodiment 2, and the phosphating treatment includes the following steps: 1) putting the sintered NdFeB magnet 41 into the bottom of the reaction tank 1; 2) putting the prepared zirconia granules 32 into the reaction tank 1 3) Slowly pour in the phosphating solution 21 to submerge the zirconia granules 32 and the sintered NdFeB magnet 41; 4) Place the reaction tank 1 on the vibration table 52 and start The vibrating table 52 vibrates, and the vibration frequency is set to 8 Hz; 5) ...

Embodiment 3

[0045] Embodiment 3 is the technical solution of the present invention applied to the phosphating treatment of sintered NdFeB magnets. The processing steps are basically the same as those in Embodiment 2, and only the differences will be described below.

[0046] Prepare nabc / 1000cm in pre-processing 3 The titanium nitride granules are ready for use. At this time, the volume ratio of the titanium nitride granules to the magnet is 1:1.

[0047] as attached Figure 6 As shown, it is a schematic diagram of embodiment 3, and the phosphating treatment includes the following steps: 1) putting the sintered NdFeB magnet 41 into the bottom of the reaction tank 1; 2) putting the prepared titanium nitride granules 33 into the reaction tank 1, and cover the sintered NdFeB magnet 41; 3) Slowly pour the phosphating solution 21 to submerge the titanium nitride particles 33 and the sintered NdFeB magnet 41; 4) Connect the reaction tank 1 to the ultrasonic vibration device 53 , and start the...

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Abstract

The invention provides a corrosion-resistant surface treatment technology. The corrosion-resistant surface treatment technology comprises the following steps: 1), placing non-conductive particles and a to-be-treated component in treating fluid, and wrapping at least one part of the to-be-treated component by the non-conductive particles deposited, wherein the non-conductive particles at least comprise one part of non-conductive particles of which the particle size is lower than 5mm; 2), enabling the non-conductive particles to move relative to the to-be-treated component; and 3), taking out the to-be-treated component when a film layer on the surface of the to-be-treated component reaches required average thickness. First, the non-conductive particles are directly put and do not need to be scattered, so that the technology is simple. Secondly, the non-conductive particles are deposited in the treating fluid, the state is stable, and continuous operation is easy to carry out. Thirdly, the requirement on the particle size of the non-conductive particles is low, and industrial cost can be greatly reduced.

Description

technical field [0001] The invention relates to a surface treatment process, in particular to a surface treatment process for forming a corrosion-resistant film layer on the surface of a workpiece to be treated. Background technique [0002] The surface treatment process involved in the present invention refers to a surface treatment process that applies the principle of chemical deposition, electrochemical deposition or physical deposition to form a corrosion-resistant film on the surface of the workpiece to be treated, such as electroless plating, electroplating, phosphating, etc. Studies have shown that mixing nano-sized particles into the treatment liquid of the above-mentioned surface treatment process can improve the film structure and thus improve the corrosion resistance. [0003] For example, as disclosed in Chinese patent document CN101665937B, as attached figure 1 As shown, in the basic phosphating solution 1' of the zinc-nickel-manganese system, a nano-scale fun...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23C24/00
Inventor 翁松青永田浩傅东辉
Owner FUJIAN CHANGJIANG GOLDEN DRAGON RARE EARTH CO LTD
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