CN210711778U - Cadmium-cobalt alloy and army green passivation coating structure - Google Patents
Cadmium-cobalt alloy and army green passivation coating structure Download PDFInfo
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- CN210711778U CN210711778U CN201920909191.1U CN201920909191U CN210711778U CN 210711778 U CN210711778 U CN 210711778U CN 201920909191 U CN201920909191 U CN 201920909191U CN 210711778 U CN210711778 U CN 210711778U
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Abstract
The utility model discloses a cadmium cobalt alloy and army green passivation's cladding material structure, including metal substrate the last cadmium cobalt alloy cladding material of preparing of metal substrate, and form and be in army green passivation layer on the cadmium cobalt alloy cladding material. The utility model has the advantages that: the cadmium-cobalt 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 the hexavalent chromium color passivation layer, and the army green passivation layer is prepared on the cadmium-cobalt alloy plating layer, so that the corrosion resistance of the plating layer can be further improved, and the problem of strong corrosion of warships and offshore petroleum equipment in China in the marine environment is solved.
Description
Technical Field
The utility model relates to a metal plating field, concretely relates to cadmium cobalt alloy and army green passivation's cladding material structure.
Background
With the advance of our country from the major manufacturing countries to the major manufacturing countries, the existing plating protection technology cannot meet the increasing technical requirements of the manufacturing industry, so the work of researching and developing new electroplating technology and high-corrosion-resistance plating is imperative.
At present, the marine parts are generally prepared into high-corrosion-resistance protective layers by adopting cadmium plating and zinc-plated nickel alloy processes, but the traditional protection technology cannot solve the problem of strong corrosion of tropical oceans in China warship butylene bay aviation protection work.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a cladding material structure of cadmium cobalt alloy and army's green passivation to solve current cladding material protection technology and can not keep up with the problem of manufacturing development demand.
In order to achieve the purpose, the utility model adopts the following technical scheme:
a cadmium-cobalt alloy and army green passivated coating structure comprises a metal matrix, a cadmium-cobalt alloy coating prepared on the metal matrix, and an army green passivated layer formed on the cadmium-cobalt alloy coating;
the cadmium cobalt alloy plating layer is prepared by adopting a potassium chloride cadmium cobalt alloy electroplating process developed by Guangzhou ultra-Pont chemical industry Co.
In some embodiments, the thickness of the cadmium cobalt alloy coating is 6-24 μm.
In some embodiments, the thickness of the army green passivation layer is 0.3-0.8 μm.
In some of these embodiments, the army green passivation layer is prepared using a chromic acid army green passivation process.
In some of these embodiments, the metal substrate is a steel substrate or an aluminum alloy substrate.
In some of these embodiments, the metal substrate is an aluminum alloy substrate.
In some embodiments, a zinc dipping layer formed on the aluminum alloy substrate and an electroless nickel plating layer plated on the zinc dipping layer are further included between the aluminum alloy substrate and the cadmium cobalt alloy plating layer.
In some of the embodiments, the zinc-dipped layer is prepared by using an acid aluminum zinc-depositing agent, and the zinc-dipped layer contains two components of zinc and nickel.
In some embodiments, the electroless nickel layer has a thickness of 3 to 10 μm,
in some of these embodiments, the electroless nickel layer is prepared using a low or medium phosphorous electroless nickel process.
The plug of the electrical switch on the aerospace and navigation equipment needs to be plated with gold, and the non-gold-plated surface of the electrical switch needs to be plated with nickel chemically or watt nickel electrically to prevent the non-gold-plated surface of the electrical switch plug from generating gold displacement reaction during gold plating.
The utility model has the advantages that:
1. the cadmium-cobalt 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 cadmium-cobalt alloy plating layer, so that the corrosion resistance of the plating layer can be further improved;
3. the acidic aluminum zinc-plating agent is adopted to prepare the zinc-dipped layer on the aluminum alloy substrate, the zinc-dipped layer contains two components of zinc and nickel, the corrosion capability of the chemical nickel plating solution to the zinc-dipped layer can be increased, the acidic chemical nickel plating solution can be directly adopted to prepare the chemical nickel-plated layer, and meanwhile, the binding force between the zinc-dipped layer and the chemical nickel-plated layer can also be increased.
4. Cadmium cobalt alloy and army green passivation's cladding material structure, according to GB/T10125 + 2012 "artificial atmosphere corrosion test salt fog experiment" carry out neutral salt fog test 4500h, plate a surface and do not have the white corrosives and generate, salt fog resistance than former space industry ministry of academic or vocational study standard QJ 453 + 1988 "cadmium plating layer technical condition" neutral salt fog experiment 96h does not appear the requirement of white corrosives 48 times.
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 cadmium-cobalt alloy and army green passivated coating structure comprises a steel substrate 1, a cadmium-cobalt alloy coating 2 electroplated on the steel substrate 1 and an army green passivated layer 3 formed on the cadmium-cobalt alloy coating 2.
The thickness of the cadmium cobalt alloy plating layer 2 is 10-12 mu m, and the cadmium cobalt alloy plating layer is prepared by adopting a potassium chloride cadmium cobalt alloy electroplating process developed by Guangzhou ultra-Pont chemical industry Co.
The components and the operating conditions of the electroplating process of the potassium chloride cadmium cobalt alloy are as follows: 20-40 g/L of cadmium chloride, 2-15 g/L of cobalt chloride, 90-160 g/L of NCC-617 complexing agent, 120-200 g/L of potassium chloride, 1-3 mL/L of NCC-617 brightener, 20-40 mL/L of NCC-617 auxiliary agent, 5-15 g/L of NCC-617 migration agent, pH of 6.5-7.5, temperature of 20-35 ℃, and cathode current density of 0.5-2.0A/dm2The area ratio of the cathode to the anode is 2: 1-3, and the anode is a cadmium plate with the cadmium content being more than or equal to 99.97%.
The army green passivation layer 3 is prepared from OVG-31 high-corrosion-resistance army green passivator in ultra-high-level chemical industry:
OVG-31 army green passivator: 80-120 mL/L;
pH of the passivation solution: 1.0 to 1.6;
passivation temperature: 20-30 DEG C
Stirring: stirring or swinging the plated part by air;
immersion time: 30-90 s;
thickness of the passivation layer: 0.5 to 0.7 μm.
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 → acid washing → water washing → alkaline anodic electrolytic degreasing → water washing → activation → water washing".
2. Electroplating cadmium cobalt alloy: after the steel part 1 is pretreated, a cadmium cobalt alloy plating layer 2 is prepared by adopting a potassium chloride cadmium cobalt alloy electroplating process, and then the plated part is subjected to dehydrogenation treatment for 10 hours at 190 ℃.
3. Passivation: the cadmium cobalt alloy plating layer 2 is subjected to the working procedures of nitric acid light extraction with volume fraction of 1.5 percent → water washing → army green passivation → water washing → drying at 70-80 ℃ to obtain an army green passivation layer 3.
Example 2:
as shown in figure 2, the cadmium cobalt alloy and army green passivated coating structure comprises an aluminum alloy substrate 1, a zinc dipping layer 2 formed on the aluminum alloy substrate 1, a chemical nickel plating layer 3 plated on the zinc dipping layer 2, a cadmium cobalt alloy coating 4 plated on the chemical nickel plating layer 3 and an army green passivated layer 5 formed on the cadmium cobalt alloy coating 4.
The zinc dipping layer 2 is prepared by adopting AZIN-113 acid aluminum zinc-depositing agent produced by ultra-high chemical industry:
AZIN-113 acid aluminum zinc deposition agent: 150-250 mL/L;
working temperature: 15-30 ℃;
the pH value of the zinc precipitation solution is as follows: 3.4 to 4.2;
and (3) zinc precipitation time: 20-80 s.
The chemical nickel-plating layer 3 is prepared by adopting a GG-155 medium-phosphorus chemical nickel-plating process in the ultra-high chemical industry:
GG-155A：60mL/L；
GG-155B：150mL/L；
pH of the plating solution: 4.8 to 5.4;
working temperature: 82-96 ℃.
The thickness of the prepared medium-phosphorus chemical nickel-plating layer is 8-10 mu m.
The preparation process of the cadmium-cobalt alloy plating layer 4 is the same as that of the embodiment 1, and the thickness is 9-11 mu m.
The preparation process of the army green passivation layer 5 is the same as that of the embodiment 1, 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 aluminum alloy part 1 is subjected to the steps of "chemical degreasing → water washing → etching → water washing → light extraction → water washing".
2. Zinc dipping: the pretreated aluminum alloy part 1 is subjected to the process of "first zincing → water washing → zinc annealing → water washing → second zincing → water washing" to obtain the zinced layer 2.
3. Chemical nickel plating: and (3) carrying out chemical nickel plating → water washing on the zinc-impregnated aluminum alloy part 1 to prepare a chemical nickel plating layer 3.
4. Electroplating cadmium cobalt alloy: after chemical nickel plating, the aluminum alloy part 1 is subjected to 'cadmium cobalt alloy plating → water washing' to prepare a cadmium cobalt alloy plating layer 4.
6. Passivation: the cadmium-cobalt alloy plating layer 4 is subjected to' nitric acid light extraction with volume fraction of 1% → water washing → army green passivation → water washing → drying at 70-80 ℃ to obtain an army green passivation layer 5.
The electroplated parts prepared in the embodiments 1 and 2 are subjected to a neutral salt spray test 4500h according to GB/T10125-2012 salt spray test for artificial atmosphere corrosion test, and no white corrosive is generated on the surfaces of the electroplated parts.
The plated articles prepared in examples 1 and 2 were tested for plating adhesion by thermal shock test according to JB 2111-. And (3) heating the plated part to 190 ℃ in a heating furnace, taking out the plated part, placing the plated part into water at room temperature, and cooling the plated part suddenly, wherein the plated layer does not foam or fall off, and the cadmium plating layer has good bonding force.
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 (7)
1. A cadmium cobalt alloy and army green passivated coating structure is characterized in that:
the cadmium-cobalt alloy passivation layer is formed on the cadmium-cobalt alloy plating layer.
2. The cadmium cobalt alloy and army green passivated coating structure of claim 1 wherein:
the thickness of the cadmium-cobalt alloy plating layer is 6-24 mu m.
3. The cadmium cobalt alloy and army green passivated coating structure of claim 1 wherein:
the thickness of the army green passivation layer is 0.3-0.8 mu m.
4. The cadmium cobalt alloy and army green passivated coating structure of claim 1 wherein:
the metal matrix is a steel matrix or an aluminum alloy matrix.
5. The cadmium cobalt alloy and army green passivated coating structure of claim 1 wherein:
the metal matrix is an aluminum alloy matrix.
6. The cadmium cobalt alloy and army green passivated coating structure of claim 5, wherein:
and a zinc dipping layer formed on the aluminum alloy substrate and a chemical nickel plating layer plated on the zinc dipping layer are also arranged between the aluminum alloy substrate and the cadmium-cobalt alloy plating layer.
7. The cadmium cobalt alloy and army green passivated coating structure of claim 6 further comprising:
the thickness of the chemical nickel-plating layer is 3-10 mu m.
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| CN201920909191.1U CN210711778U (en) | 2019-06-17 | 2019-06-17 | Cadmium-cobalt alloy and army green passivation coating structure |
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