CN210420165U - Potassium chloride cyanide-free cadmium-titanium alloy plating and army green passivated plating layer structure - Google Patents
Potassium chloride cyanide-free cadmium-titanium alloy plating and army green passivated plating layer structure Download PDFInfo
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- CN210420165U CN210420165U CN201920685615.0U CN201920685615U CN210420165U CN 210420165 U CN210420165 U CN 210420165U CN 201920685615 U CN201920685615 U CN 201920685615U CN 210420165 U CN210420165 U CN 210420165U
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Abstract
The utility model discloses a potassium chloride does not have cyanogen plating cadmium titanium alloy and army green passivation's cladding material structure, including metal substrate, the potassium chloride that prepares on metal substrate does not have cyanogen cadmium titanium alloy cladding material, and forms army green passivation layer on the potassium chloride does not have cyanogen cadmium titanium alloy cladding material. The utility model has the advantages that: compared with the traditional cadmium-titanium alloy plating layer, the potassium chloride cyanide-free cadmium-titanium alloy plating layer has high compactness and excellent corrosion resistance, and is suitable for preparing high corrosion resistance plating layers in various strong corrosion environments; the army green passivation layer has higher corrosion resistance than a hexavalent chromium color passivation layer, and the army green passivation layer is prepared on the potassium chloride cyanide-free cadmium titanium alloy plating layer, so that the corrosion resistance of the plating layer can be further improved, and the application range of the plating layer is expanded.
Description
Technical Field
The utility model relates to a metal plating field, concretely relates to potassium chloride cyanide-free cadmium-plated titanium alloy and army green passivation's cladding material structure.
Background
The cadmium-titanium alloy coating has the characteristic of low hydrogen brittleness, and is prepared by a cyanide cadmium-titanium alloy electroplating process and a nitrilotriacetic acid-ammonium salt cyanide-free cadmium-titanium alloy electroplating process at present. The cadmium titanium alloy plating layers prepared by the two processes are not compact enough and have not high enough corrosion resistance, so the cadmium titanium alloy plating layers have narrow application range and are only used for preparing the protective layers of aerospace high-strength structural steel parts at present; and the post-treatment of the cadmium-titanium alloy coating adopts a high chromic acid color passivation process to prepare a color passivation layer, and the applied passivation process is not environment-friendly.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a potassium chloride does not have cyanogen plating layer structure of cadmium titanium alloy and army's green passivation to it is fine and close inadequately to solve among the prior art cladding material, and its corrosion resistance is not enough high, and cadmium titanium alloy cladding material range of application is narrow, and cladding material preparation technology is to the not good scheduling problem of environmental impact.
In order to achieve the purpose, the utility model adopts the following technical scheme:
a potassium chloride cyanide-free cadmium-titanium alloy plating and army green passivated plating layer structure comprises a metal matrix, a potassium chloride cyanide-free cadmium-titanium alloy plating layer prepared on the metal matrix, and an army green passivated layer formed on the potassium chloride cyanide-free cadmium-titanium alloy plating layer.
Further, the thickness of the potassium chloride cyanide-free cadmium titanium alloy plating layer is 6-24 mu m.
Further, the thickness of the potassium chloride cyanide-free cadmium titanium alloy plating layer is 8-12 mu m.
Further, the potassium chloride cyanide-free cadmium titanium alloy plating layer is prepared by adopting a potassium chloride cyanide-free cadmium titanium alloy electroplating process; the plating solution used in the potassium chloride cyanide-free cadmium titanium alloy electroplating process comprises the following components: cadmium chloride, potassium chloride, a coordination agent, sodium fluoride, a titanium salt supply agent, a brightening agent, an auxiliary agent and a displacement agent.
Furthermore, the thickness of the army green passivation layer is 0.3-1.0 μm.
Further, the army green passivation layer is prepared by adopting a chromic acid army green passivation process.
Further, the metal matrix is a steel matrix or an aluminum alloy matrix.
Further, the metal matrix is an aluminum alloy matrix.
Furthermore, a zinc dipping layer formed on the aluminum alloy substrate, a chemical pre-plated nickel layer plated on the zinc dipping layer and a chemical nickel plating layer plated on the chemical pre-plated nickel layer are also included between the aluminum alloy substrate and the potassium chloride cyanide-free cadmium-titanium alloy plating layer.
Further, the zinc dipping layer is prepared by a zinc dipping process.
Further, the chemical nickel pre-plating layer is prepared by adopting an alkaline chemical nickel plating process, and the thickness of the plating layer is 1-5 mu m.
Further, the chemical nickel plating layer is prepared by adopting a low-phosphorus chemical nickel plating process, and the thickness of the plating layer is 3-10 mu m.
The utility model has the advantages that:
1. compared with the traditional cadmium-titanium alloy plating layer, the potassium chloride cyanide-free cadmium-titanium alloy plating layer has high compactness and excellent corrosion resistance, and is suitable for preparing high corrosion resistance plating layers in various strong corrosion environments;
2. the army green passivation layer has higher corrosion resistance than the hexavalent chromium color passivation layer, and the army green passivation layer is prepared on the potassium chloride cyanide-free cadmium titanium alloy plating layer, so that the corrosion resistance of the plating layer can be further improved, and the application range of the plating layer is expanded;
3. after the aluminum alloy matrix is subjected to zinc dipping and chemical nickel preplating, the chemical nickel plating layer prepared by adopting the low-phosphorus chemical nickel plating process has low phosphorus content and is difficult to passivate, and good bonding force can be formed between the chemical nickel plating layer and the potassium chloride cyanide-free cadmium-titanium alloy plating layer.
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 view of a structure of a plating layer according to embodiment 1 of the present invention;
FIG. 2 is a schematic view of the structure of the coating layer in embodiment 2 of the present invention.
Detailed Description
The present invention will be described in detail with reference to the drawings and specific embodiments, and the exemplary embodiments and descriptions of the present invention are used to explain the present invention, but not to limit the present invention.
Example 1:
as shown in figure 1, the potassium chloride cyanide-free cadmium-free titanium alloy and army green passivated coating structure comprises a steel substrate 1, a potassium chloride cyanide-free cadmium-free titanium alloy coating 2 electroplated on the steel substrate 1 and an army green passivated layer 3 formed on the potassium chloride cyanide-free cadmium-free titanium alloy coating 2.
The thickness of the potassium chloride cyanide-free cadmium titanium alloy plating layer 2 is 10-12 mu m; the alloy is prepared by adopting a potassium chloride cyanide-free cadmium titanium alloy electroplating process. The components and the operating conditions of the potassium chloride cyanide-free cadmium titanium alloy electroplating process are as follows: 25-35 g/L of cadmium chloride, 2-5 g/L of NCC-617 titanium salt replenishing agent, 90-140 g/L of NCC-617 complexing agent, 5-15 g/L of NCC-617 migration agent, 140-180 g/L of potassium chloride, 1.5-2.5 mL/L of NCC-617 brightener, 25-35 mL/L of NCC-617 auxiliary agent, 6.5-7.5 pH, 20-35 ℃ of temperature and 0.5-2.0A/dm of cathode current density2The area ratio of the cathode to the anode is 1: 1, and the anode is a cadmium plate with the cadmium content being more than or equal to 99.97 percent.
The army green passivation layer 3 is prepared from OVG-31 high-corrosion-resistance army green passivator in ultra-high-bonding chemical industry, and the thickness of the army green passivation layer is 0.5-0.7 mu m.
The operation of the embodiment is divided into the following steps:
1. pretreatment: the iron and steel component 1 is subjected to the steps of "alkaline chemical degreasing → water washing → alkaline anodic electrolytic degreasing → water washing → acid washing → water washing → cathodic electrolytic degreasing → water washing → activation → water washing".
2. Cadmium-titanium alloy plating layer: after the steel part 1 is pretreated, a cadmium-titanium alloy plating layer 2 is prepared by adopting potassium chloride cyanide-free cadmium-titanium alloy plating, and then the plated piece is subjected to dehydrogenation treatment for 10 hours at 190 ℃.
3. Passivation layer: the cadmium-titanium alloy plating layer 2 is subjected to the working procedures of '2% nitric acid light extraction → water washing → army green passivation → water washing → drying → aging at 65 ℃ for 15 min' to obtain the passivation layer 3.
Example 2:
as shown in figure 2, the potassium chloride cyanide-free cadmium-free titanium alloy and army green passivated coating structure comprises an aluminum alloy substrate 1A, a zinc dipping layer 4 on the aluminum alloy substrate 1A, a chemical pre-plated nickel layer 5 plated on the zinc dipping layer 4, a chemical nickel plating layer 6 plated on the chemical pre-plated nickel layer 5, a potassium chloride cyanide-free cadmium titanium alloy coating 2 plated on the chemical nickel plating layer 6 and an army green passivated layer 3 formed on the potassium chloride cyanide-free cadmium titanium alloy coating 2.
The zinc dipping layer 4 is a transition coating, is dipped in zinc by using a common zinc dipping solution and is prepared by adopting the existing zinc dipping process.
The chemical pre-nickel plating layer 5 is a transition plating layer and is formed in an alkaline chemical nickel plating solution, and the thickness of the chemical pre-nickel plating layer is 2-3 mu m.
The chemical nickel-plating layer 6 is an intermediate plating layer and is prepared by a low-phosphorus chemical nickel-plating process, and the thickness of the chemical nickel-plating layer is 6-8 mu m.
The thickness of the potassium chloride cyanide-free cadmium titanium alloy plating layer 2 is 10-12 mu m.
The thickness of the army green passivation layer 3 is 0.5-0.7 mu m.
The operation of the embodiment is divided into the following steps:
1. pretreatment: the aluminum alloy part 1A is subjected to the steps of "chemical degreasing → water washing → etching → water washing → light extraction → water washing".
2. Zinc dipping layer: the aluminum alloy part 1A subjected to the pretreatment is subjected to the steps of "first zincing → water washing → zinc annealing → water washing → second zincing → water washing" to obtain the zinced layer 4.
3. Chemical pre-plating of nickel layer: the zinc-dipped aluminum alloy part 1A is prepared into a chemical pre-plating nickel layer 5 by using an alkaline chemical nickel plating solution.
4. Chemical nickel plating layer: the aluminum alloy part 1A after chemical nickel preplating is subjected to low-phosphorus chemical nickel plating solution to obtain a chemical nickel plating layer 6.
5. The potassium chloride cyanide-free cadmium titanium alloy plating layer: after the chemical nickel plating of the parts, the cadmium-titanium alloy plating layer 2 is prepared by adopting the same potassium chloride cyanide-free cadmium-titanium alloy electroplating process as the embodiment 1.
6. An army green passivation layer: the potassium chloride cyanide-free cadmium titanium alloy plating layer 2 is subjected to the working procedures of 1-2% nitric acid light extraction → water washing → army green passivation → water washing → drying → aging at 65 ℃ for 15min to obtain the passivation layer 3.
The electroplated parts prepared in the embodiments 1 and 2 are subjected to a neutral salt spray test for 4000h according to GB/T10125-.
The technical solutions provided by the embodiments of the present invention are described in detail above, and the principles and embodiments of the present invention are explained herein by using specific examples, and the descriptions of the above embodiments are only applicable to help understand 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 may be variations in the specific implementation manners and application ranges, and in summary, the content of the description should not be construed as a limitation to the present invention.
Claims (10)
1. A potassium chloride cyanide-free cadmium titanium alloy and army green passivated plating layer structure is characterized in that:
the potassium chloride cyanide-free cadmium titanium alloy passivation layer comprises a metal substrate, a potassium chloride cyanide-free cadmium titanium alloy plating layer prepared on the metal substrate, and a military green passivation layer formed on the potassium chloride cyanide-free cadmium titanium alloy plating layer.
2. The plating layer structure of potassium chloride cyanide-free cadmium titanium alloy and army green passivation according to claim 1, characterized in that:
the thickness of the potassium chloride cyanide-free cadmium titanium alloy coating is 6-24 mu m.
3. The potassium chloride cyanide-free cadmium titanium alloy and army green passivated coating structure according to claim 1 or 2, characterized in that:
the potassium chloride cyanide-free cadmium titanium alloy plating layer is prepared by adopting a potassium chloride cyanide-free cadmium titanium alloy electroplating process.
4. The plating layer structure of potassium chloride cyanide-free cadmium titanium alloy and army green passivation according to claim 1, characterized in that:
the thickness of the army green passivation layer is 0.3-1.0 mu m.
5. The potassium chloride cyanide-free cadmium titanium alloy and army green passivated coating structure according to claim 1 or 4, characterized in that:
the army green passivation layer is prepared by adopting a chromic acid army green passivation process.
6. The plating layer structure of potassium chloride cyanide-free cadmium titanium alloy and army green passivation according to claim 1, characterized in that:
the metal matrix is a steel matrix or an aluminum alloy matrix.
7. The potassium chloride cyanide-free cadmium titanium alloy and army green passivated coating structure according to claim 6, characterized in that:
the metal matrix is an aluminum alloy matrix.
8. The plating layer structure of potassium chloride cyanide-free cadmium titanium alloy and army green passivation according to claim 7, characterized in that:
the aluminum alloy substrate and the potassium chloride cyanide-free cadmium titanium alloy coating also comprise a zinc dipping layer formed on the aluminum alloy substrate, a chemical pre-plated nickel layer plated on the zinc dipping layer and a chemical nickel plating layer plated on the chemical pre-plated nickel layer.
9. The plating layer structure of potassium chloride cyanide-free cadmium titanium alloy and army green passivation as claimed in claim 8, wherein:
the chemical pre-plated nickel layer is prepared by adopting an alkaline chemical nickel plating process, and the thickness of the plating layer is 1-5 mu m.
10. The plating layer structure of potassium chloride cyanide-free cadmium titanium alloy and army green passivation as claimed in claim 8, wherein:
the chemical nickel plating layer is prepared by adopting a low-phosphorus chemical nickel plating process, and the thickness of the plating layer is 3-10 mu m.
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