CN111118563A - Pretreatment method for nickel electroplating of titanium alloy and nickel electroplating method of titanium alloy - Google Patents
Pretreatment method for nickel electroplating of titanium alloy and nickel electroplating method of titanium alloy Download PDFInfo
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- CN111118563A CN111118563A CN202010016583.2A CN202010016583A CN111118563A CN 111118563 A CN111118563 A CN 111118563A CN 202010016583 A CN202010016583 A CN 202010016583A CN 111118563 A CN111118563 A CN 111118563A
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- Prior art keywords
- titanium alloy
- solution
- fluorination
- nickel
- nickel electroplating
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- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D5/00—Electroplating characterised by the process; Pretreatment or after-treatment of workpieces
- C25D5/34—Pretreatment of metallic surfaces to be electroplated
- C25D5/38—Pretreatment of metallic surfaces to be electroplated of refractory metals or nickel
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D3/00—Electroplating: Baths therefor
- C25D3/02—Electroplating: Baths therefor from solutions
- C25D3/12—Electroplating: Baths therefor from solutions of nickel or cobalt
Abstract
The invention provides a pretreatment method for nickel electroplating of a titanium alloy, which comprises the following steps: (1) carrying out chemical degreasing and acid washing on the titanium alloy; and (2) subjecting the titanium alloy treated in the step (1) to a fluorination treatment under the following fluorination solution and conditions and an activation treatment under the following activation solution and conditions, the fluorination solution:
activating solution: h2SO4(ρ 1.84 g/ml): temperature of 100-150 g/L: room temperature time: 50-70 s; the invention also provides a titanium alloy nickel electroplating method comprising the pretreatment step.
Description
Technical Field
The invention relates to a pretreatment method for nickel electroplating of a titanium alloy, and relates to a method for nickel electroplating of a titanium alloy, which comprises the pretreatment step, and belongs to the field of surface treatment of metal materials.
Background
Titanium is an important structural metal, and because titanium and titanium alloy have various excellent properties such as small density, good heat resistance, excellent corrosion resistance, high strength-to-weight ratio and the like, the titanium alloy is widely applied to various fields such as aviation, aerospace, weapons, chemical industry, metallurgy, ships and warships and the like. However, titanium alloys also have many disadvantages, such as poor wear resistance, easy surface friction, poor lubricity, poor electrical and thermal conductivity, susceptibility to stress corrosion, and susceptibility to adhesion and seizure at high temperature or under high load, which limits the application range to some extent. In order to compensate for the above-mentioned disadvantages of titanium alloys, the surface properties thereof may be modified by subjecting them to surface treatment. The nickel electroplating is one of mature surface treatment technologies, is a simple and practical technical means, and can endow titanium alloy with some physicochemical characteristics which the titanium alloy does not have so as to meet the requirements of practical application.
Titanium has a very strong affinity for oxygen, and a dense oxide film is quickly formed on the surface of titanium. This oxide film seriously hinders the strong bonding of the metal plating to the titanium alloy substrate. Therefore, a proper pretreatment process is found to ensure the binding force of the metal coating and the titanium alloy substrate, and the method has great significance for expanding the application of the titanium alloy.
Disclosure of Invention
Therefore, aiming at the defects of the prior art, the invention provides a pretreatment method for nickel electroplating of titanium alloy, which aims to solve the problems that the titanium alloy is very easy to oxidize, and an oxide film is quickly formed on the surface of the titanium alloy, so that the subsequent electroplating is difficult or the binding force of a plating layer after electroplating is poor. Based on the pretreatment step, the invention also provides a method for electroplating nickel on the titanium alloy. According to the method of the present invention, a strong nickel metal plating layer can be formed on the surface of the titanium alloy.
Specifically, the inventors of the present invention have unexpectedly found that when a titanium alloy part is subjected to a general chemical degreasing and pickling treatment, a nickel metal plating layer strongly bonded to the titanium alloy part can be obtained by performing nickel preplating and nickel electroplating after performing a fluorination treatment under the following fluorination solution and conditions of the present invention and performing an activation treatment under the following activation solution and conditions of the present invention. Further, the inventors of the present invention have also found that the effect of the present invention, that is, the firm bonding of the titanium alloy substrate and the nickel metal plating layer, can be achieved only when the fluorination treatment and the activation treatment are combined.
Fluorination solution:
activating solution:
H2SO4(ρ＝1.84g/ml)： 100～150g/L
temperature: at room temperature
Time: 50 to 70s
Preferably, the fluorination solution and conditions for the fluorination treatment are:
fluorination solution:
preferably, the activation solution and conditions of the activation treatment are as follows:
activating solution:
H2SO4(ρ＝1.84g/ml)： 120g/L
temperature: at room temperature
Time: 60s
The method is particularly suitable for the pretreatment of the BT20 titanium alloy nickel electroplating.
Therefore, the titanium alloy electronickelling treatment of the invention comprises the following steps:
step 1: chemical degreasing
Chemical degreasing is well known to those skilled in the art, and generally, a titanium alloy part is immersed in a chemical degreasing solution at the temperature of 70-90 ℃, and after 10-30 min, the part is taken out and cleaned in clear water;
step 2: acid pickling
Pickling is well known to those skilled in the art, and generally, a titanium alloy part is immersed in a pickling solution at room temperature, and after 3-10 seconds, the part is taken out and cleaned in clear water;
and step 3: fluorination treatment
Immersing the titanium alloy part in a fluorinated solution at 70-80 ℃, taking out the part after 5-6 min, and cleaning the part in ultrasonic clear water for 20-30 s;
and 4, step 4: activation of
Immersing the titanium alloy part in an acid pickling solution at room temperature, taking out the part after 50-70 s, and cleaning the part in clear water;
and 5: pre-nickel plating
The nickel preplating is well known to those skilled in the art, and generally, a part is immersed in a nickel preplating solution at room temperature, and after 2-3 min, the part is taken out and cleaned in clear water;
step 6: electroplating of nickel
Electroplating nickel is well known to those skilled in the art, and generally, a part is immersed in an electroplating nickel solution at room temperature, and after a certain period of time, the part is taken out and cleaned in clean water.
Compared with the prior art, the titanium alloy is pretreated by the titanium alloy nickel electroplating pretreatment method, so that the binding force between the electroplated nickel coating and the titanium alloy substrate can be effectively improved.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail with reference to specific embodiments below.
Example 1
The BT20 titanium alloy was electroplated with nickel as follows.
First, BT20 titanium alloy was chemically degreased and pickled using a process well known to those skilled in the art, and then was subjected to a fluorination treatment under the following fluorination solution and conditions and an activation treatment under the following activation solution and conditions:
fluorination solution:
activating solution:
H2SO4(ρ＝1.84g/ml)： 100g/L
temperature: at room temperature
Time: 50s
Finally, nickel preplating and nickel electroplating are performed using processes well known to those skilled in the art.
After 1h of nickel electroplating, a lattice test is carried out according to 2.8 in GB/T5270-2005, test methods for metal coating on metal substrate-electrodeposition and chemical deposition-adhesion strength, and the result shows that the bonding force is good.
Example 2
BT20 titanium alloy electroplating with nickel was performed in the same manner as in example 1 except that the fluorination treatment and the activation treatment were performed under the following fluorination/activation solutions and conditions:
fluorination solution:
activating solution:
H2SO4(ρ＝1.84g/ml)： 100g/L
temperature: at room temperature
Time: 50s
After 1h of nickel electroplating, a lattice test is carried out according to 2.8 in GB/T5270-2005, test methods for metal coating on metal substrate-electrodeposition and chemical deposition-adhesion strength, and the result shows that the bonding force is good.
Example 3
BT20 titanium alloy electroplating with nickel was performed in the same manner as in example 1 except that the fluorination treatment and the activation treatment were performed under the following fluorination/activation solutions and conditions:
fluorination solution:
activating solution:
H2SO4(ρ＝1.84g/ml)： 100g/L
temperature: at room temperature
Time: 50s
After 1h of nickel electroplating, a lattice test is carried out according to 2.8 in GB/T5270-2005, test methods for metal coating on metal substrate-electrodeposition and chemical deposition-adhesion strength, and the result shows that the bonding force is good.
Example 4
BT20 titanium alloy electroplating with nickel was performed in the same manner as in example 1 except that the fluorination treatment and the activation treatment were performed under the following fluorination/activation solutions and conditions:
fluorination solution:
activating solution:
H2SO4(ρ＝1.84g/ml)： 100g/L
temperature: at room temperature
Time: 70s
After 1h of nickel electroplating, a lattice test is carried out according to 2.8 in GB/T5270-2005, test methods for metal coating on metal substrate-electrodeposition and chemical deposition-adhesion strength, and the result shows that the bonding force is good.
Example 5
BT20 titanium alloy electroplating with nickel was performed in the same manner as in example 1 except that the fluorination treatment and the activation treatment were performed under the following fluorination/activation solutions and conditions:
fluorination solution:
activating solution:
H2SO4(ρ＝1.84g/ml)： 150g/L
temperature: at room temperature
Time: 70s
After 1h of nickel electroplating, a lattice test is carried out according to 2.8 in GB/T5270-2005, test methods for metal coating on metal substrate-electrodeposition and chemical deposition-adhesion strength, and the result shows that the bonding force is good.
Example 6
BT20 titanium alloy electroplating with nickel was performed in the same manner as in example 1 except that the fluorination treatment and the activation treatment were performed under the following fluorination/activation solutions and conditions:
fluorination solution:
activating solution:
H2SO4(ρ＝1.84g/ml)： 150g/L
temperature: at room temperature
Time: 70s
After 1h of nickel electroplating, a lattice test is carried out according to 2.8 in GB/T5270-2005, test methods for metal coating on metal substrate-electrodeposition and chemical deposition-adhesion strength, and the result shows that the bonding force is good.
Example 7
BT20 titanium alloy electroplating with nickel was performed in the same manner as in example 1 except that the fluorination treatment and the activation treatment were performed under the following fluorination/activation solutions and conditions:
fluorination solution:
activating solution:
H2SO4(ρ＝1.84g/ml)： 150g/L
temperature: at room temperature
Time: 70s
After 1h of nickel electroplating, a lattice test is carried out according to 2.8 in GB/T5270-2005, test methods for metal coating on metal substrate-electrodeposition and chemical deposition-adhesion strength, and the result shows that the bonding force is good.
Example 8
BT20 titanium alloy electroplating with nickel was performed in the same manner as in example 1 except that the fluorination treatment and the activation treatment were performed under the following fluorination/activation solutions and conditions:
fluorination solution:
activating solution:
H2SO4(ρ＝1.84g/ml)： 150g/L
temperature: at room temperature
Time: 70s
After 1h of nickel electroplating, a lattice test is carried out according to 2.8 in GB/T5270-2005, test methods for metal coating on metal substrate-electrodeposition and chemical deposition-adhesion strength, and the result shows that the bonding force is good.
Comparative example
BT20 titanium alloy was electroplated with nickel in the same manner as in example 1, except that the fluorination and activation treatments according to the present invention were not performed. After 1 hour of nickel electroplating, a lattice test is carried out according to 2.8 in GB/T5270-2005, test methods for metal coating on metal substrate-electrodeposition and chemical deposition-adhesion strength, and the result shows that the metal coating and the titanium alloy part are poorly bonded.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention. The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, several modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be regarded as the protection scope of the present invention.
Claims (6)
1. A pretreatment method for nickel electroplating of a titanium alloy comprises the following steps:
(1) carrying out chemical degreasing and acid washing on the titanium alloy; and
(2) subjecting the titanium alloy treated in step (1) to a fluorination treatment under the following fluorination solution and conditions and an activation treatment under the following activation solution and conditions,
fluorination solution:
activating solution:
H2SO4(ρ＝1.84g/ml)： 100～150g/L
temperature: at room temperature
Time: 50-70 s.
2. The pretreatment method according to claim 1, wherein the titanium alloy is a BT20 titanium alloy.
3. The pretreatment method according to claim 1, wherein the fluorination treatment and the activation treatment are performed under the following conditions:
fluorination solution:
activating solution:
H2SO4(ρ＝1.84g/ml)： 120g/L
temperature: at room temperature
Time: for 60 s.
4. A method of nickel electroplating of a titanium alloy, the method comprising the steps of:
(1) carrying out chemical degreasing and acid washing on the titanium alloy;
(2) subjecting the titanium alloy treated in step (1) to a fluorination treatment under the following fluorination solution and conditions and an activation treatment under the following activation solution and conditions,
fluorination solution:
activating solution:
H2SO4(ρ＝1.84g/ml)： 100～150g/L
temperature: at room temperature
Time: 50-70 s; and
(3) and (3) carrying out nickel pre-plating and nickel electroplating on the titanium alloy treated in the step (2), so as to form a nickel metal plating layer on the surface of the titanium alloy.
5. The method of claim 4, wherein the titanium alloy is BT20 titanium alloy.
6. The method according to claim 4, wherein the fluorination treatment and the activation treatment are performed under the following conditions:
fluorination solution:
activating solution:
H2SO4(ρ＝1.84g/ml)： 120g/L
temperature: at room temperature
Time: for 60 s.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010016583.2A CN111118563A (en) | 2020-01-08 | 2020-01-08 | Pretreatment method for nickel electroplating of titanium alloy and nickel electroplating method of titanium alloy |
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| CN202010016583.2A CN111118563A (en) | 2020-01-08 | 2020-01-08 | Pretreatment method for nickel electroplating of titanium alloy and nickel electroplating method of titanium alloy |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113463148A (en) * | 2021-06-29 | 2021-10-01 | 惠州市安泰普表面处理科技有限公司 | Method for electroplating gold on surface of titanium or titanium alloy substrate |
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| US3676224A (en) * | 1970-10-16 | 1972-07-11 | Lubrizol Corp | Phosphating solution with scale suppressing characteristics |
| CN103757676A (en) * | 2013-12-11 | 2014-04-30 | 中国航空工业标准件制造有限责任公司 | Pyrophosphate electrocoppering method of titanium alloy |
| CN106567057A (en) * | 2016-11-14 | 2017-04-19 | 南昌航空大学 | Method for adopting fluoride-phosphate conversion as titanium alloy chemical nickel plating pretreatment |
-
2020
- 2020-01-08 CN CN202010016583.2A patent/CN111118563A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3676224A (en) * | 1970-10-16 | 1972-07-11 | Lubrizol Corp | Phosphating solution with scale suppressing characteristics |
| CN103757676A (en) * | 2013-12-11 | 2014-04-30 | 中国航空工业标准件制造有限责任公司 | Pyrophosphate electrocoppering method of titanium alloy |
| CN106567057A (en) * | 2016-11-14 | 2017-04-19 | 南昌航空大学 | Method for adopting fluoride-phosphate conversion as titanium alloy chemical nickel plating pretreatment |
Non-Patent Citations (2)
| Title |
|---|
| 夏益祥 等: "钛合金表面电镀的预处理工艺探讨", 《腐蚀科学与防腐蚀工程技术新进展 中国腐蚀与防护学会成立20周年论文集》 * |
| 夏益祥: "钛合金电镀工艺的研究", 《万方数据库 学位论文》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113463148A (en) * | 2021-06-29 | 2021-10-01 | 惠州市安泰普表面处理科技有限公司 | Method for electroplating gold on surface of titanium or titanium alloy substrate |
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Application publication date: 20200508 |