CN211689265U - High corrosion resistance composite coating structure for black chromium electroplating of trivalent chromium - Google Patents
High corrosion resistance composite coating structure for black chromium electroplating of trivalent chromium Download PDFInfo
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- CN211689265U CN211689265U CN201921968597.3U CN201921968597U CN211689265U CN 211689265 U CN211689265 U CN 211689265U CN 201921968597 U CN201921968597 U CN 201921968597U CN 211689265 U CN211689265 U CN 211689265U
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Abstract
The utility model relates to a high corrosion resistance trivalent chromium electroplates compound cladding material structure of black chromium, including the metal matrix, the metal matrix top is equipped with the nickel coating in advance, nickel coating in advance top is equipped with the copper coating, copper coating top is equipped with no space trivalent chromium cladding material, no space trivalent chromium cladding material top is equipped with high corrosion resistance cladding material, high corrosion resistance cladding material comprises high corrosion resistance trivalent chromium white chromium cladding material, hard chrome plating, trivalent chromium black chromium cladding material that set gradually from top to bottom, high corrosion resistance cladding material top is equipped with the galvanizing coat, nickel coating in advance, copper coating, no space trivalent chromium cladding material, high corrosion resistance cladding material, galvanizing coat electroplate in proper order at the metal matrix top, effectively solved the lower problem of trivalent chromium black chromium cladding material corrosion resistance, can play the guard action to trivalent chromium black chromium cladding material, can effectively play long-time protection to the metal matrix, the service life of the composite coating is prolonged.
Description
Technical Field
The utility model relates to a black chromium composite coating structure is electroplated to high corrosion resistance trivalent chromium belongs to the electroplating field.
Background
The trivalent chromium black chromium electroplating layer has high wear resistance and beautiful appearance, has wide application prospect in the field of electronic and hardware electroplating, can generate hydrogen in the chromium plating process, releases stress, has pores in the trivalent chromium black chromium plating layer, contains elements such as sulfur, cobalt, iron and the like, is influenced by the factors, has low corrosion resistance, and can not meet the technical requirements of high-end products, so the trivalent chromium black chromium electroplating process and the plating layer structure are still to be further researched and improved, at present, the plating layer structure of the trivalent chromium black chromium electroplating layer is generally a cyanide copper plating layer, a pyrophosphate copper plating layer, a bright copper plating layer, a semi-bright copper plating layer, a bright nickel plating layer and a trivalent chromium black chromium plating layer from the bottom layer to the outer layer, the neutral salt spray test shows that white corrosive substances are generally generated on the surface of the black chromium plating layer after 48 hours of the salt spray test, the bright nickel plating layer is seriously corroded after the black chromium plating layer is removed, the corrosion resistance of the nickel plating layer is much lower than that of the chromium plating layer, the surface of the nickel plating layer which is not subjected to protection treatment is corroded after 24 hours of the neutral salt spray test, and in the composite plating layer structure of the nickel plating layer and the trivalent chromium plating layer, the corrosive substances firstly corrode the nickel plating layer through the pores of the chromium plating layer generally, so that long-time corrosion resistance protection can not be realized on a base body at the bottom.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model overcomes current defect, provides a black chromium's composite coating structure is electroplated to high corrosion resistance trivalent chromium, has effectively solved the lower problem of trivalent chromium black chrome plating corrosion resistance, can play the guard action to trivalent chromium black chrome plating, can effectively play long-time protection to metal substrate, can effectively solve the problem in the background art.
In order to solve the technical problem, the utility model provides a following technical scheme:
the utility model provides a black chrome's composite coating structure is electroplated to high corrosion resistance trivalent chromium, includes metal matrix, the metal matrix top is equipped with the nickel coating in advance, the nickel coating top of preplating is equipped with the copper facing, the copper coating top is equipped with no space trivalent chromium cladding material, no space trivalent chromium cladding material top is equipped with high corrosion resistance cladding material, high corrosion resistance cladding material comprises high corrosion resistance trivalent chromium white chrome plating, hard chrome plating, trivalent chromium black chrome plating that from the top down set gradually, high corrosion resistance cladding material top is equipped with the galvanizing coat, nickel coating in advance, copper coating, no space trivalent chromium plating, high corrosion resistance cladding material, galvanizing coat are electroplated at the metal matrix top in proper order.
Further, the metal matrix is provided as a steel matrix.
Further, the metal substrate is provided as a stainless steel substrate.
Further, the thickness of the nickel pre-plating layer is set to be 0.5-1.5 μm.
Further, the thickness of the copper plating layer is set to 10 to 20 μm.
Further, the thickness of the void-free trivalent chromium plating layer is set to be 6-10 μm.
Further, the thickness of the high corrosion resistance plating layer is set to be 1 to 3 μm.
The utility model discloses beneficial effect: the utility model provides a black chrome's composite coating structure is electroplated to high corrosion resistance trivalent chromium, adopt the characteristic that no space of no space trivalent chromium cladding material remedies the defect of hexavalent chromium cladding material, through increase a layer of high corrosion resistance trivalent chromium white chrome coating at trivalent chromium black chrome cladding material top, the lower problem of trivalent chromium black chrome cladding material corrosion resistance has effectively been solved, the hard chrome coating that sets up simultaneously can play the guard action to trivalent chromium black chrome coating, through set up the better galvanizing coat of corrosion resistance at top, the corrosion resistance at composite coating top has further been improved, the life of composite coating has been improved, can effectively play long-time protection to metal matrix.
Drawings
The accompanying drawings are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention, and together with the description serve to explain the invention and not to limit the invention.
FIG. 1 is a perspective view of the composite coating structure of the high corrosion resistance trivalent chromium electroplating black chromium of the present invention.
FIG. 2 is a front view of the composite coating structure of the high corrosion resistance trivalent chromium electroplating black chromium of the utility model.
FIG. 3 is a high corrosion resistance coating structure diagram of the composite coating structure of the high corrosion resistance trivalent chromium electroplating black chromium of the utility model.
Reference numbers in the figures: 1. a metal substrate; 2. pre-plating a nickel layer; 3. plating a copper layer; 4. a void-free trivalent chromium plating layer; 5. a high corrosion resistance plating layer; 6. trivalent chromium black chromium plating; 7. hard chromium plating; 8. a high corrosion resistance trivalent chromium white chromium coating; 9. and (4) a zinc coating.
Detailed Description
The present invention will be further described with reference to the following embodiments, wherein the drawings are for illustrative purposes only and are not intended to be limiting, and in order to better illustrate the embodiments of the present invention, some components of the drawings may be omitted, enlarged or reduced and do not represent the size of an actual product.
Example 1
As shown in fig. 1-3, a high corrosion resistance trivalent chromium black chromium electroplating composite coating structure includes a metal substrate 1, a pre-nickel plating layer 2 is disposed on the top of the metal substrate 1, a copper plating layer 3 is disposed on the top of the pre-nickel plating layer 2, a void-free trivalent chromium plating layer 4 is disposed on the top of the copper plating layer 3, a high corrosion resistance plating layer 5 is disposed on the top of the void-free trivalent chromium plating layer 4, the high corrosion resistance plating layer 5 is composed of a high corrosion resistance trivalent chromium white chromium plating layer 8, a hard chromium plating layer 7 and a trivalent chromium black chromium plating layer 6 which are sequentially disposed from top to bottom, a zinc plating layer 9 is disposed on the top of the high corrosion resistance plating layer 5, and the pre-nickel plating layer 2, the copper plating layer 3, the void-free trivalent chromium plating layer 4, the high corrosion resistance plating layer 5 and the zinc plating layer 9 are.
In this embodiment, the metal base 1 is configured as a steel base.
In this embodiment, the thickness of the nickel pre-plating layer 2 is set to 0.5 to 1.5 μm.
In the present embodiment, the thickness of the copper plating layer 3 is set to 10 to 20 μm.
In the embodiment, the thickness of the void-free trivalent chromium plating layer 4 is set to be 6-10 μm.
In the present embodiment, the thickness of the high corrosion resistance plating layer 5 is set to 1 to 3 μm.
Example 2
In this embodiment, the metal substrate 1 is configured as a stainless steel substrate, which can effectively protect the stainless steel substrate from corrosion.
The utility model discloses improve in: the utility model provides a high corrosion resistance trivalent chromium electroplates compound cladding material structure of black chromium, adopt the characteristic of no space trivalent chromium cladding material 4 to compensate the defect of hexavalent chromium cladding material, through increase one deck high corrosion resistance trivalent chromium white chromium cladding material 8 at trivalent chromium black chromium cladding material 6 tops, the lower problem of trivalent chromium black chromium cladding material corrosion resistance has effectively been solved, the hard chrome plating layer 7 that sets up simultaneously can play the guard action to trivalent chromium black chromium cladding material 6, through set up better galvanized layer of corrosion resistance 9 at top, the corrosion resistance at compound cladding material top has further been improved, the life of compound cladding material has been improved, can effectively play long-time protection to metal substrate.
The foregoing is an embodiment of the preferred embodiment of the present invention, showing and describing the basic principles and main features of the present invention and the advantages of the present invention, it should be understood by those skilled in the art that the present invention is not limited by the foregoing embodiments, and the foregoing embodiments and descriptions are only illustrative of the principles of the present invention, and various changes and modifications may be made without departing from the spirit and scope of the present invention, which fall within the scope of the present invention as claimed, and the scope of the present invention is defined by the appended claims and their equivalents.
Claims (7)
1. The utility model provides a black chromium's composite coating structure is electroplated to high corrosion resistance trivalent chromium, includes metal matrix (1), its characterized in that: the high-corrosion-resistance metal base plate is characterized in that a pre-nickel-plated layer (2) is arranged at the top of the metal base body (1), a copper-plated layer (3) is arranged at the top of the pre-nickel-plated layer (2), a gapless trivalent chromium plating layer (4) is arranged at the top of the copper-plated layer (3), a high-corrosion-resistance plating layer (5) is arranged at the top of the gapless trivalent chromium plating layer (4), the high-corrosion-resistance plating layer (5) is composed of a high-corrosion-resistance trivalent chromium white chromium plating layer (8), a hard chromium plating layer (7) and a trivalent chromium black chromium plating layer (6) which are sequentially arranged from top to bottom, a zinc plating layer (9) is arranged at the top of the metal base body (1) at the top of the pre-nickel-plated layer (2), the copper-plated layer (3), the gapless trivalent.
2. The composite plating structure of high corrosion resistance trivalent chromium electroplating black chromium according to claim 1, characterized in that: the metal matrix (1) is a steel matrix.
3. The high corrosion resistance trivalent chromium black chromium electroplated composite coating structure as set forth in claim 1 or 2, characterized in that: the metal substrate (1) is a stainless steel substrate.
4. The composite plating structure of high corrosion resistance trivalent chromium electroplating black chromium according to claim 1, characterized in that: the thickness of the pre-plated nickel layer (2) is set to be 0.5-1.5 mu m.
5. The composite plating structure of high corrosion resistance trivalent chromium electroplating black chromium according to claim 1, characterized in that: the thickness of the copper plating layer (3) is set to be 10-20 mu m.
6. The composite plating structure of high corrosion resistance trivalent chromium electroplating black chromium according to claim 1, characterized in that: the thickness of the void-free trivalent chromium plating layer (4) is set to be 6-10 mu m.
7. The composite plating structure of high corrosion resistance trivalent chromium electroplating black chromium according to claim 1, characterized in that: the thickness of the high-corrosion-resistance coating (5) is set to be 1-3 mu m.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921968597.3U CN211689265U (en) | 2019-11-14 | 2019-11-14 | High corrosion resistance composite coating structure for black chromium electroplating of trivalent chromium |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921968597.3U CN211689265U (en) | 2019-11-14 | 2019-11-14 | High corrosion resistance composite coating structure for black chromium electroplating of trivalent chromium |
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| CN211689265U true CN211689265U (en) | 2020-10-16 |
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| CN201921968597.3U Active CN211689265U (en) | 2019-11-14 | 2019-11-14 | High corrosion resistance composite coating structure for black chromium electroplating of trivalent chromium |
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