CN218642854U - Neodymium iron boron black zinc plating and graphene enclosed plating structure - Google Patents
Neodymium iron boron black zinc plating and graphene enclosed plating structure Download PDFInfo
- Publication number
- CN218642854U CN218642854U CN202221790600.9U CN202221790600U CN218642854U CN 218642854 U CN218642854 U CN 218642854U CN 202221790600 U CN202221790600 U CN 202221790600U CN 218642854 U CN218642854 U CN 218642854U
- Authority
- CN
- China
- Prior art keywords
- plating
- iron boron
- neodymium iron
- layer
- graphene
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Abstract
The utility model discloses a neodymium iron boron black zinc plating and graphite alkene confined cladding material structure, including the neodymium iron boron base member and the citrate that prepares in proper order from inside to outside on the neodymium iron boron base member nickel coating in advance, pyrophosphate copper plate, galvanizing coat, trivalent chromium black passivation layer and graphite alkene sealing layer. The utility model discloses a black zinc is plated to neodymium iron boron and graphite alkene confined cladding material structure carries out neutral salt fog test 192h according to GB/T10125-2012 "artificial atmosphere corrosion test salt fog test" and plates a surface and do not have the white corrosive substance and generate. The coating structure has high corrosion resistance, and the preparation technology has good market prospect.
Description
Technical Field
The utility model belongs to the technical field of metal surface treatment, concretely relates to neodymium iron boron black zinc plating and graphite alkene confined cladding material structure.
Background
Neodymium iron boron materials have been widely used for preparing high magnetic magnets. The surface of the neodymium iron boron substrate is porous, and the material has high chemical activity. In the prior art, protective layers such as a zinc coating, a nickel coating, a copper-nickel-chromium composite coating, a nickel-copper-nickel composite coating and the like are prepared on the surface of the neodymium iron boron, but the coatings cannot effectively protect the neodymium iron boron matrix from being corroded. At present, after the neodymium iron boron magnets sold in the market are placed indoors for two years, the phenomena of pitting corrosion, bubbling and even coating falling can occur on the surfaces of some products.
Disclosure of Invention
In order to solve the relatively poor problem of neodymium iron boron plating piece corrosion resistance, the utility model provides a neodymium iron boron black zinc plating and graphite alkene confined cladding material structure. In order to achieve the purpose, the utility model adopts the following technical scheme:
the utility model provides a neodymium iron boron black zinc plating and graphite alkene confined plating layer structure, includes the neodymium iron boron base member and the citrate nickel precoating layer, pyrophosphate copperization layer, galvanizing coat, trivalent chromium black passivation layer and the graphite alkene confined layer that prepare in proper order from inside to outside on the neodymium iron boron base member.
Preferably, the thickness of the citrate pre-plated nickel layer is 2-7 μm.
Preferably, the pyrophosphate copper plating layer has a thickness of 4 to 11 μm.
Preferably, the thickness of the zinc plating layer is 6 to 13 μm.
Preferably, the thickness of the graphene sealing layer is 0.7-1.2 μm.
The surface of the neodymium iron boron substrate has more pores, the substrate is directly galvanized, and the plating solution can be immersed into the pores on the surface of the substrate. When the acid galvanizing process is adopted for galvanizing, the acid galvanizing solution can slowly corrode the substrate and the plating layer, and finally, bubbling or pitting corrosion occurs at the position of a pore. When the alkaline galvanizing process is adopted for galvanizing, the alkaline plating solution can corrode a galvanizing layer, so that pitting corrosion occurs at the position of a pore. The utility model discloses a nickel coating is preplated in citrate nickel plating technology preparation, and neutral citrate nickel plating solution is very little to the corrosive action of neodymium iron boron base member and galvanizing coat, can not destroy base member and cladding material. The citrate nickel plating solution has higher deep plating capability, and the adoption of the citrate nickel plating process for nickel pre-plating is also beneficial to hole sealing of the neodymium iron boron matrix. The pH value of the pyrophosphate copper plating solution is 8.6-9.0, the pyrophosphate copper plating solution has no corrosion effect on the neodymium iron boron matrix, and the pyrophosphate copper plating on the pre-plated nickel layer can finally seal the pores on the surface of the neodymium iron boron matrix. The pyrophosphate copper plating layer is galvanized, the galvanized layer is an anode plating layer, a higher potential difference exists between the two plating layers, and the pyrophosphate copper plating layer can effectively prevent corrosive media from corroding towards the direction of the substrate.
Compared with the prior art, the utility model discloses following beneficial effect has:
1. the utility model discloses a neodymium iron boron black zinc plating and graphene closed plating structure, which can effectively overcome the technical defects that the zinc coating prepared on the surface of a neodymium iron boron matrix in the prior art is easy to blister and has point corrosion;
2. the utility model discloses an adopt the black passive film of trivalent chromium on the graphite alkene sealant closed galvanizing coat, can overcome the technical defect that trivalent chromium passive film does not possess self-repairability, show the corrosion resistance and the life that improve the piece of plating.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, do not constitute a limitation of the invention, and in which:
FIG. 1 is a schematic diagram of the structure of the plating layer in examples 1 and 2 of the present invention.
Detailed Description
The invention will be described in detail with reference to the drawings and specific embodiments, which are used to explain the invention, but not as a limitation thereof.
The utility model provides a black zinc of neodymium iron boron plating and graphite alkene confined cladding structure, includes the neodymium iron boron base member and the citrate nickel precoating layer, pyrophosphate copper-plated layer, galvanizing coat, trivalent chromium black passivation layer and the graphite alkene confined layer that prepare in proper order from inside to outside on the neodymium iron boron base member.
Carrying out oil removal, rust removal and activation treatment on a neodymium iron boron workpiece substrate according to the existing pretreatment process, and then sequentially preparing a citrate pre-plated nickel layer, a pyrophosphate copper-plated layer, a zinc-plated layer, a trivalent chromium black passivation layer and a graphene sealing layer.
The thickness of the citrate pre-plated nickel layer is 2-7 mu m, and the citrate pre-plated nickel layer is prepared by adopting the existing citrate nickel plating process.
Preferably, the citrate nickel plating process comprises the following steps: 180-250 g/L of nickel sulfate hexahydrate, 10-12 g/L of sodium chloride, 30-35 g/L of boric acid, 30-40 g/L of magnesium sulfate, 7.0-7.2 of pH value, 50-60 ℃ of temperature and 1-1.5A/dm of cathode current density 2 The cathode moves 4-6 m/min.
The pyrophosphate copper plating layer is 4-11 mu m thick and is prepared by adopting the existing pyrophosphate copper plating process.
The thickness of the zinc coating is 6-13 μm, and the zinc coating is prepared by adopting the existing zinc coating process.
Preferably, the galvanizing process adopts a DETRONZIN 401 potassium chloride galvanizing process developed by Guangzhou ultra-Pont chemical industry Co., ltd: 50-70 g/L of zinc chloride, 180-220 g/L of potassium chloride, 25-35 g/L of boric acid, 0.8-1.5 mL/L of DETRONZIN 401 brightener, 25-35 mL/L of DETRONZIN 401 softener, 15-30 ℃, 4.8-5.6 of pH value and 1-4A/dm of cathode current density 2 The cathode moves 3-5 m/min.
Preferably, the galvanizing process adopts a DETRONZIN 2699 alkaline galvanizing process in ultra-high chemical industry: 8 to 12g/L of zinc ions, 100 to 130g/L of sodium hydroxide, 6 to 12mL/L of Detronzin 2699 Base auxiliary agent, 0.5 to 2mL/L of Detronzin 2699 Bri main light agent, 3 to 6mL/L of Detronzin purifying agent M, 4 to 7mL/L of Detronzin purifying agent W, 20 to 35 ℃ of plating bath temperature and 1.5 to 4.5A/dm of cathode current density 2 The cathode is moved 3-4 m/min.
The trivalent chromium black passivation layer is prepared by adopting the existing trivalent chromium black passivator.
Preferably, the trivalent chromium black passivation layer is prepared by using TRIROS BP-889 trivalent chromium black passivator in the ultra-bonding chemical industry, and the passivation process is as follows: TRIROS BP-889A passivator 100-140 mL/L, TRIROS BP-889B passivator 50-70 mL/L, pH range 1.6-2.4, operating temperature 20-30 ℃, passivating time 30-90 s, and air or mechanical stirring.
The thickness of the graphene sealing layer is 0.7-1.2 mu m, and the graphene sealing layer is prepared by adopting a graphene modified coating sealing agent.
Preferably, the hydroxyl graphene modified plating sealant is prepared by using PRODICO 430 hydroxyl graphene modified sealant developed by Nippon chemical industry: the volume fraction of the PRODICO 430 hydroxyl graphene modified sealing agent is 30-40%, the operation is carried out at room temperature, the dipping time is 5-20 s, the sealing agent is drained after being taken out of a tank, the sealing agent remained on a plated part is blown off by high-pressure air, and the sealing agent is dried and cured for 20-35 min at 70-100 ℃.
Example 1:
as shown in fig. 1, a neodymium iron boron black zinc plating and graphene enclosed plating structure comprises a neodymium iron boron base body 1, and a citrate pre-nickel plating layer 2, a pyrophosphate copper plating layer 3, a zinc plating layer 4, a trivalent chromium black passivation layer 5 and a graphene enclosed layer 6 which are sequentially prepared on the neodymium iron boron base body 1 from inside to outside.
The base body of the neodymium iron boron workpiece is subjected to oil removal, rust removal and activation treatment according to the existing pretreatment process.
Pre-plating nickel after pretreatment of a workpiece, wherein the thickness of a plating layer is 3 mu m, and the coating is prepared by adopting the existing citrate nickel plating process.
200g/L of nickel sulfate hexahydrate, 10g/L of sodium chloride, 30g/L of boric acid, 32g/L of magnesium sulfate, 7.0 of pH value, 55 ℃ of temperature and 1.2A/dm of cathode current density 2 The cathode was moved 5m/min.
The workpiece is plated with the taro after being pre-plated with nickel, the thickness of a plating layer is 8 mu m, and the workpiece is prepared by adopting the existing pyrophosphate copper plating process.
The workpiece is galvanized after being plated with the pyrocopper, the thickness of the plating layer is 10 mu m, and the workpiece is prepared by adopting the DETRONZIN 401 potassium chloride galvanizing process of Guangzhou ultra-Bonder chemical engineering.
60g/L of zinc chloride, 200g/L of potassium chloride, 30g/L of boric acid, 1mL/L of DETRONZIN 401 brightener, 30mL/L of DETRONZIN 401 softener, 25 ℃ of temperature, 5.2 of pH value and 2A/dm of cathode current density 2 The cathode was moved 4m/min.
After galvanizing, the workpiece is passivated with trivalent chromium black, and is prepared by TRIROS BP-889 trivalent chromium black passivator in Guangzhou ultra-Pond chemical industry.
TRIROS BP-889A passivator 110mL/L, TRIROS BP-889B passivator 55mL/L, pH =2.0, operating temperature 25 ℃, passivating time 60s, air or mechanical stirring.
Carrying out graphene sealing after black passivation of trivalent chromium of a workpiece, wherein the thickness of a sealing layer is 1.0 mu m, and the sealing layer is prepared by PRODICO 430 hydroxyl graphene modified sealing agent developed by Guangzhou Chaobang chemical industry.
The volume fraction of the PRODICO 430 hydroxyl graphene modified sealing agent is 32%, the operation is carried out at room temperature, the dipping time is 10s, and the drying and curing are carried out for 30min at 80 ℃.
The operation of the embodiment is divided into the following steps:
1. pretreatment: the workpiece base 1 is subjected to a pretreatment process of "alkaline chemical degreasing → water washing → rust removal → water washing → ultrasonic degreasing → water washing → acid salt activation → water washing".
2. Pre-plating nickel: and preparing a nickel pre-plating layer 2 after pretreatment of the workpiece.
3. Pyrophosphate copper plating: and (3) preparing a pyrophosphate copper plating layer 3 after pre-plating nickel on the workpiece.
4. And (3) potassium chloride galvanization: after the workpiece is plated with the coke copper, a zinc coating 4 is prepared according to a potassium chloride zinc coating process.
5. And (3) passivating trivalent chromium black: after the workpiece is galvanized, the trivalent chromium black passivation layer 5 is prepared by 'light extraction by dilute nitric acid with volume fraction of 1% >, water washing → passivation of trivalent chromium black → water washing'.
6. After the black passivation of the trivalent chromium of the workpiece, preparing a graphene sealing layer 6 by 'dipping hydroxyl graphene sealing liquid → draining from a groove → blowing off the residual sealing liquid on the workpiece by high-pressure air → drying and curing'.
Example 2:
as shown in fig. 1, a neodymium iron boron black zinc plating and graphene enclosed plating structure comprises a neodymium iron boron base body 1, and a citrate pre-nickel plating layer 2, a pyrophosphate copper plating layer 3, a zinc plating layer 4, a trivalent chromium black passivation layer 5 and a graphene enclosed layer 6 which are sequentially prepared from inside to outside on the neodymium iron boron base body 1.
The base body of the neodymium iron boron workpiece is subjected to oil removal, rust removal and activation treatment according to the existing pretreatment process.
Pre-plating nickel after pretreatment of a workpiece, wherein the thickness of a plating layer is 5 mu m, and the coating is prepared by adopting the existing citrate nickel plating process.
230g/L nickel sulfate hexahydrate, 12g/L sodium chloride, 35g/L boric acid, 38g/L magnesium sulfate, 7.2 pH value, 55 ℃ temperature and 1.2A/dm cathode current density 2 The cathode was moved 5m/min.
The workpiece is plated with the taro after being pre-plated with nickel, the thickness of a plating layer is 6 mu m, and the workpiece is prepared by adopting the existing pyrophosphate copper plating process.
The workpiece is galvanized after being plated with the copper coke, the thickness of the plating layer is 12 mu m, and the workpiece is prepared by adopting a DETRONZIN 2699 alkaline galvanizing process in ultra-high chemical engineering.
10g/L of zinc ions, 110g/L of sodium hydroxide, 8mL/L of Detrozin 2699 Base auxiliary agent, 1.5mL/L of Detrozin 2699 Bri main light agent, 3mL/L of Detrozin purificant M, 6mL/L of Detrozin purificant W, the temperature of a plating bath is 30 ℃, and the cathode current density is 3A/dm 2 The cathode was moved 3m/min.
After galvanizing, the workpiece is passivated with trivalent chromium black, and is prepared by TRIROS BP-889 trivalent chromium black passivator in Guangzhou ultra-Pond chemical industry.
130mL/L TRIROS BP-889A passivator, 65mL/L TRIROS BP-889B passivator, pH =2.0, operating temperature 25 ℃, passivating time 60s, air or mechanical stirring.
And carrying out graphene sealing after black passivation of trivalent chromium of the workpiece, wherein the thickness of a sealing layer is 1.2 mu m, and the sealing layer is prepared by PRODICO 430 hydroxy graphene modified sealing agent developed by Chaobang chemical industry.
The volume fraction of the PRODICO 430 hydroxyl graphene modified sealing agent is 38%, the operation is carried out at room temperature, the dipping time is 10s, and the drying and curing are carried out for 20min at 90 ℃.
The operation of the embodiment is divided into the following steps:
1. pretreatment: the workpiece base 1 is subjected to a pretreatment process of "alkaline chemical degreasing → water washing → rust removal → water washing → ultrasonic degreasing → water washing → acid salt activation → water washing".
2. Pre-nickel plating: and preparing a nickel pre-plating layer 2 after pretreatment of the workpiece.
3. Pyrophosphate copper plating: and (3) preparing a pyrophosphate copper plating layer 3 after pre-plating nickel on the workpiece.
4. And (3) potassium chloride galvanization: after the workpiece is plated with the pyrocopper, a zinc coating 4 is prepared according to a cyanide-free alkaline zinc plating process.
5. Black passivation of trivalent chromium: after the workpiece is galvanized, the trivalent chromium black passivation layer 5 is prepared by 'light extraction by dilute nitric acid with volume fraction of 1% >, water washing → passivation of trivalent chromium black → water washing'.
6. After the black passivation of the trivalent chromium of the workpiece, preparing a graphene sealing layer 6 by 'dipping hydroxyl graphene sealing liquid → draining from a groove → blowing off the residual sealing liquid on the workpiece by high-pressure air → drying and curing'.
The neodymium iron boron black zinc plating and graphene closed plating layer structure prepared in the embodiment 1 and the embodiment 2 is subjected to a neutral salt spray test 192h according to GB/T10125-2012 salt spray test for artificial atmosphere corrosion test, and no white rust is generated on the surface of a plated part. The utility model discloses the neodymium iron boron black zinc plating and graphite alkene confined cladding material structure of preparation carries out the time that neutral salt fog does not produce white rust and is 4 times higher than GB/T34491-2017 "sintered neodymium iron boron surface coating" standard regulation through the time that the neutral salt fog of colored passivation's galvanizing coat neutral salt fog test 48h begins the corrosion.
The technical solutions provided by the embodiments of the present invention are introduced in detail, and the principles and embodiments of the present invention are explained by using specific examples, and the explanations of the above embodiments are only applicable to help understanding the principles of the embodiments of the present invention; meanwhile, for a person skilled in the art, according to the embodiments of the present invention, there are variations in the specific implementation and application ranges. In general, nothing in this specification should be construed as limiting the invention.
Claims (5)
1. The utility model provides a black zinc is plated to neodymium iron boron and graphite alkene confined cladding material structure which characterized in that: the neodymium iron boron base body is sequentially provided with a citrate pre-nickel-plating layer, a pyrophosphate copper-plating layer, a zinc-plating layer, a trivalent chromium black passivation layer and a graphene sealing layer from inside to outside.
2. The neodymium-iron-boron black-plated zinc and graphene enclosed plating structure of claim 1, wherein: the thickness of the citrate pre-plated nickel layer is 2-7 mu m.
3. The neodymium-iron-boron black-plated zinc and graphene enclosed plating structure of claim 1, wherein: the pyrophosphate copper plating layer has a thickness of 4 to 11 μm.
4. The neodymium-iron-boron black-plated zinc and graphene enclosed plating structure of claim 1, wherein: the thickness of the zinc coating is 6-13 μm.
5. The neodymium-iron-boron black-zinc-plated and graphene-enclosed plating structure according to claim 1, characterized in that: the thickness of the graphene sealing layer is 0.7-1.2 mu m.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221790600.9U CN218642854U (en) | 2022-07-13 | 2022-07-13 | Neodymium iron boron black zinc plating and graphene enclosed plating structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221790600.9U CN218642854U (en) | 2022-07-13 | 2022-07-13 | Neodymium iron boron black zinc plating and graphene enclosed plating structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218642854U true CN218642854U (en) | 2023-03-17 |
Family
ID=85489332
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221790600.9U Active CN218642854U (en) | 2022-07-13 | 2022-07-13 | Neodymium iron boron black zinc plating and graphene enclosed plating structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218642854U (en) |
-
2022
- 2022-07-13 CN CN202221790600.9U patent/CN218642854U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN210065926U (en) | High corrosion resistance potassium chloride zinc coating structure suitable for aerospace parts | |
| CN218642854U (en) | Neodymium iron boron black zinc plating and graphene enclosed plating structure | |
| CN101550570A (en) | Non-cyanide electro cooper plating bath of EDTA system and use method thereof | |
| CN210176975U (en) | Cadmium-cobalt alloy and trivalent chromium passivated coating structure | |
| CN218666353U (en) | Protective layer structure of neodymium iron boron application graphite alkene electrophoresis lacquer | |
| CN215103561U (en) | High corrosion resistance coating structure of iron casting galvanized iron alloy | |
| CN115433980A (en) | Trivalent chromium plating method for neodymium iron boron workpiece | |
| CN217351575U (en) | Coating structure of neodymium iron boron zinc-plating chromium-free passivation | |
| CN218786672U (en) | Neodymium iron boron zinc-nickel plating alloy and graphene enclosed plating layer structure | |
| CN211170931U (en) | Iron casting zinc-plating and hydroxyl graphene closed plating structure | |
| CN218666341U (en) | Coating structure of neodymium iron boron zinc-nickel plating alloy and silane chromium-free passivation | |
| CN205115644U (en) | High corrosion resistance's trivalent chromium chromium -plated layer structure | |
| CN113174617B (en) | Method for preparing super-hydrophobic Zn-Fe alloy coating in eutectic ionic liquid through electrodeposition | |
| CN218666344U (en) | Plating layer structure for electroplating trivalent chromium and rare earth electrolytic protection on surface of neodymium iron boron | |
| CN217361286U (en) | Coating structure of sintered neodymium iron boron zinc-nickel alloy | |
| CN211170932U (en) | Barrel-plating shallow black nickel and nano graphene closed plating layer structure | |
| CN219586209U (en) | Plating layer structure of zinc alloy die casting gold-plated palladium alloy | |
| CN220724348U (en) | Galvanized nickel alloy of aerospace aluminum alloy part and graphene-enclosed plating structure | |
| CN218666343U (en) | Coating structure for neodymium iron boron cadmium plating suitable for aerospace | |
| CN218710934U (en) | Coating structure for plating zinc alloy die casting trivalent chromium with pearl chromium | |
| CN220450331U (en) | Plating layer structure of cyanide-free cadmium plating of zinc alloy die casting | |
| CN218786671U (en) | Neodymium iron boron plates trivalent black chromium and graphite alkene confined cladding layer structure | |
| CN219886209U (en) | Plating layer structure of cyanide-free gold-plated palladium alloy | |
| CN218642830U (en) | Coating structure for passivation of zinc-plated trivalent chromium and silane chromium-free passivation | |
| CN217351579U (en) | Coating structure for gold plating on surface of neodymium iron boron |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |