CN103849865A - Plating activation pretreatment method of titanium alloy fastener - Google Patents
Plating activation pretreatment method of titanium alloy fastener Download PDFInfo
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- CN103849865A CN103849865A CN201410116380.5A CN201410116380A CN103849865A CN 103849865 A CN103849865 A CN 103849865A CN 201410116380 A CN201410116380 A CN 201410116380A CN 103849865 A CN103849865 A CN 103849865A
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Abstract
The invention provides a plating activation pretreatment method of a titanium alloy fastener. The plating activation pretreatment method comprises the following steps: by taking 20g/L-100g/L ammonium bifluoride aqueous liquor as activation liquor, soaking the fastener with a completely exposed surface in prepared activation liquor after completing oil removal operation of the fastener, preserving heat of the activation liquor between 15 DEG C and 30 DEG C, and carrying out surface activation for 30S-120S on the fastener to realize the plating activation pretreatment of the surface of the titanium alloy fastener. Compared with the existing plating activation pretreatment method, the plating activation pretreatment method disclosed by the invention has the advantages of simple operation process, low equipment investment, safe material application, low price and the like; moreover, after the fastener treated by the placing activation pretreatment method is electrically plated or chemically plated, performances of a clad layer satisfy standard requirements of HB5036, HB5051 and HB/Z5071.
Description
Technical field
The invention relates to a kind of surface treatment method, relates in particular to a kind of surface treatment method of titanium alloy fastener.
Background technology
Titanium or titanium alloy has good mechanical property and mechanical property, and its intensity is high, density is low, nonmagnetic, high temperature resistance, thermal expansivity are little, all has good solidity to corrosion to biologically inert and in various media, is therefore widely applied.
But the standard potential of titanium or titanium alloy is very low, chemical property is very active, surface is easy to generate one deck thin film of titanium oxide, this layer film can hinder the further surface treatment procedure of titanium or titanium alloy, especially, when plating, electroless plating etc. are processed, fastener surface is difficult to the coating of the upper expection of deposition, though local deposits coating, it is also on duty mutually with the bonding force of matrix, and fastening piece is difficult to meet relevant criterion requirement.As HB5036 " cadmium coater quality test ", HB5051 " silvering quality test ", HB/Z5071 " nickel chemical plating technology and quality test ".
At present, in order to realize the surface treatment mode such as plating, electroless plating of titanium alloy surface, the method generally adopting is plating front activating, mainly contain anode activation method, chemical corrosion method, sand-blast etc., the soak time of these methods is long, activates required equipment many and complicated, has taken too much resource.A kind of new plating pretreatment activating method has been developed in the invention, before several method have that operating process is simple, low cost and other advantages.
Summary of the invention
The problem that the invention will solve is to provide a kind of titanium alloy fastener plating front activating treatment process, fastening piece is electroplated or electroless plating before it is carried out to activation treatment, to form evenly and the strong coating of bonding force, make the performance such as performance, outward appearance, bonding force, solidity to corrosion of the fastening piece after plating all can meet standard-required.
For solving the problems of the technologies described above, the technical scheme that the invention adopts is: a kind of titanium alloy fastener plating front activating treatment process, comprises the following steps:
S1. oil removing: fastening piece is put into degreasing fluid and soak 2min～4min, then take out washing, to clear water complete wetting fastener surface;
S2. prepare activated solution: described activated solution is the ammonium bifluoride aqueous solution, the concentration of ammonium bifluoride is 20g/L～100g/L, first in container, adding volume is the water of wish preparation treatment solution volume 1/3～1/2, calculate the quality of ammonium bifluoride to be added according to the wish preparation volume for the treatment of solution and the densitometer of ammonium bifluoride, and add in the water in container by the ammonium bifluoride of this quality, stirred solution to ammonium bifluoride dissolves completely, make up water, to the volume of wish preparation treatment solution, is again stirred to solution and mixes again;
S3. activation treatment: the fastening piece after S1 is cleaned is submerged in the activated solution in S2, keeps the temperature of activated solution between 15 DEG C～30 DEG C, and fastening piece activates 30S～120S in activated solution, then takes out washing 60S～90S;
S4. drying treatment: first the fastening piece after washing in S3 is carried out predryingly, then fastening piece is put into the air dry oven of 60 DEG C～70 DEG C dry 20min～30min.
Wherein, in order to strengthen deoiling effect, in S1, fastening piece is immersed in the process of oil removing in degreasing fluid and adds ultrasonic wave, oil removing process is removed at greasy dirts such as processing, the grease, oil and the lubricants that use in manufacturing processed titanium alloy fastener, ensures that the surface of fastening piece in the process of follow-up activation treatment is completely exposed in activated solution.
Wherein, described degreasing fluid is alkaline aqueous solution, the mixed solution that the solution that described degreasing fluid is independent alkali solute or multiple alkali solute are mixed.
Wherein, the washing in S3 adopts the mode of adverse current washing, and the mode of adverse current washing can rinse out the ammonium hydrogen fluoride solution that is attached to fastener surface better.
Wherein, the predrying mode in S4 is: dry with the hot blast drying of 50 DEG C～60 DEG C or with the drier of 40 DEG C～50 DEG C.Predryingly the moisture film of fastener surface can be destroyed and most of moisture is dispelled, after can ensure that the water molecules of fastener surface is dispelled completely in the process of drying in gas blower loft drier.
The invention is plated front activating processing by ammonium hydrogen fluoride solution to fastening piece, operating process is simple, equipment investment is low, and starting material use safe, cheap, there is good economic worth, in table 1, the present invention is done to detailed comparison from different plating front activating treatment processs, can clearly find out the advantage of the invention.
The application comparison of the different plating of table 1 front activating treatment process
Embodiment
Below in conjunction with embodiment, the invention is elaborated.
Embodiment 1
By titanium alloy fastener ultrasonic wave oil removing 3min and clean up, reach water-break-free, then be submerged in ammonium hydrogen fluoride solution, in this ammonium hydrogen fluoride solution per unit volume (every liter), contain ammonium bifluoride 40g, keep the temperature of ammonium hydrogen fluoride solution between 20 DEG C～30 DEG C, fastening piece activates 110S in ammonium hydrogen fluoride solution, then takes out adverse current washing 60S, use afterwards 50 DEG C～60 DEG C hot blast dryings, then put into 60 DEG C～70 DEG C air dry ovens and dry 20～30min.
Embodiment 2
By titanium alloy fastener ultrasonic wave oil removing 3min and clean up, reach water-break-free, then immerse in ammonium hydrogen fluoride solution, in this ammonium hydrogen fluoride solution per unit volume (every liter), contain ammonium bifluoride 80g, keep the temperature of ammonium hydrogen fluoride solution between 20 DEG C～30 DEG C, fastening piece activates 110S in ammonium hydrogen fluoride solution, then take out adverse current washing 90S, afterwards with drying 3～5min in 40 DEG C～50 DEG C driers, then put into 60 DEG C～70 DEG C air dry ovens and dry 20～30min.
For the effect of checking technical solution of the present invention, choose respectively each 3～5 of the titanium alloy bolt of different size and model, method according to embodiment 1 and embodiment 2 is plated front activating processing, then electroplate or electroless plating, through plating aftertreatment, whether coating performance is met to HB5036, HB5051, HB/Z5071 standard-required is verified, as shown in table 2.
Wherein, the technical process of different types of plating or electroless plating is as follows:
Cadmium plating technical process: oil removing → washing → plating front activating → washing → dry → nickel preplating → washing → cadmium plating → bright dipping → dehydrogenation → passivation → washing → dry;
Electrosilvering technical process: the bright water → washing of oil removing → washing → plating front activating → washing → dry → nickel preplating → washing → silver-plated → washing → electrosilvering → dehydrogenation in advance → soak → be dried;
Nickel chemical plating technology flow process: oil removing → washing → plating front activating → washing → dry → chemical nickel plating → washing → dehydrogenation → dry.
The standard test result of the fastening piece of table 2 differing materials and specification
Wherein, in above-mentioned proof procedure, the titanium alloy bolt of different size and model is judged to " meeting " HB5036, HB5051, the index request of HB/Z5071 standard is as shown in table 3 below.
Table 3 judgement meets HB5036, HB5051, the index request of HB/Z5071 standard
Above the embodiment of the invention is had been described in detail, but described content is only for the preferred embodiment of the invention, can not be considered to for limiting practical range of the present invention.All equalization variation and improvement etc. of doing according to the invention scope, within all should still belonging to this patent covering scope.
Claims (7)
1. a titanium alloy fastener plating front activating treatment process, is characterized in that: comprise the following steps:
S1. oil removing: fastening piece is put into degreasing fluid and soak 2min～4min, then take out washing, to clear water complete wetting fastener surface;
S2. prepare activated solution: described activated solution is the ammonium bifluoride aqueous solution, the concentration of ammonium bifluoride is 20g/L～100g/L, first in container, adding volume is the water of the volume 1/3～1/2 of wish preparation treatment solution, calculate the quality of ammonium bifluoride to be added according to the wish preparation volume for the treatment of solution and the densitometer of ammonium bifluoride, and add in the water in container by the ammonium bifluoride of this quality, stirred solution to ammonium bifluoride dissolves completely, make up water, to the volume of wish preparation treatment solution, is again stirred to solution and mixes again;
S3. activation treatment: the fastening piece after S1 is cleaned is submerged in the activated solution in S2, keeps the temperature of activated solution between 15 DEG C～30 DEG C, and fastening piece activates 30S～120S in activated solution, then takes out washing 60S～90S;
S4. drying treatment: first the fastening piece after washing in S3 is carried out predryingly, then fastening piece is put into the air dry oven of 60 DEG C～70 DEG C dry 20min～30min.
2. titanium alloy fastener according to claim 1 plating front activating treatment process, is characterized in that: in S1, fastening piece is immersed in the process of oil removing in degreasing fluid and adds intensified by ultrasonic wave deoiling effect.
3. titanium alloy fastener plating front activating treatment process according to claim 1, is characterized in that: described degreasing fluid is alkaline aqueous solution.
4. titanium alloy fastener plating front activating treatment process according to claim 1, is characterized in that: the washing in S3 adopts the mode of adverse current washing.
5. titanium alloy fastener according to claim 1 plating front activating treatment process, is characterized in that: the predrying mode in S4 is: with the hot blast drying of 50 DEG C～60 DEG C or with the drier drying of 40 DEG C～50 DEG C.
6. titanium alloy fastener plating front activating treatment process according to claim 1, is characterized in that: comprise the following steps:
S1. oil removing: fastening piece is put into degreasing fluid ultrasonic wave oil removing 3min, then take out washing, to clear water complete wetting fastener surface;
S2. prepare activated solution: described activated solution is the ammonium bifluoride aqueous solution, the concentration of ammonium bifluoride is 40g/L, first in container, add 1/2L water, then 40g ammonium bifluoride is added in the water in container, stirred solution to ammonium bifluoride dissolves completely, make up water to liquor capacity reaches 1L again, is again stirred to solution and mixes;
S3. activation treatment: the fastening piece after S1 is cleaned is submerged in the activated solution in S2, keeps the temperature of activated solution between 20 DEG C～30 DEG C, and fastening piece activates 110S in activated solution, then takes out adverse current washing 60S;
S4. drying treatment: first use the hot blast drying fastening piece of 50 DEG C～60 DEG C, then fastening piece is put into the air dry oven of 60 DEG C～70 DEG C dry 20min～30min.
7. titanium alloy fastener plating front activating treatment process according to claim 1, is characterized in that: comprise the following steps:
S1. oil removing: fastening piece is put into degreasing fluid ultrasonic wave oil removing 3min, then take out washing, to clear water complete wetting fastener surface;
S2. prepare activated solution: described activated solution is the ammonium bifluoride aqueous solution, the concentration of ammonium bifluoride is 80g/L, first in container, add 1/2L water, then 80g ammonium bifluoride is added in the water in container, stirred solution to ammonium bifluoride dissolves completely, make up water to liquor capacity reaches 1L again, is again stirred to solution and mixes;
S3. activation treatment: the fastening piece after S1 is cleaned is submerged in the activated solution in S2, keeps the temperature of activated solution between 20 DEG C～30 DEG C, and fastening piece activates 30S in activated solution, then takes out adverse current washing 90S;
S4. drying treatment: first dry 3min～5min with 40 DEG C～50 DEG C driers, then fastening piece is put into the air dry oven of 60 DEG C～70 DEG C dry 20min～30min.
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| CN201410116380.5A CN103849865A (en) | 2014-03-26 | 2014-03-26 | Plating activation pretreatment method of titanium alloy fastener |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107119296A (en) * | 2017-06-27 | 2017-09-01 | 中国人民解放军第五七九工厂 | A kind of method of anode activation titanium alloy electro-coppering |
| CN109295485A (en) * | 2018-09-28 | 2019-02-01 | 江苏永昊高强度螺栓有限公司 | A kind of electroplating technology of high-strength bolt |
Citations (6)
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|---|---|---|---|---|
| JPH06248489A (en) * | 1993-02-22 | 1994-09-06 | Tanaka Kikinzoku Kogyo Kk | Method for treatment before plating for corrosion resistant material |
| JPH0832965B2 (en) * | 1992-10-02 | 1996-03-29 | 株式会社日本アルミ | Pretreatment method for plating titanium material |
| US20040188261A1 (en) * | 2003-03-27 | 2004-09-30 | Scimed Life Systems, Inc. | Methods of forming medical devices |
| CN101760714A (en) * | 2009-12-28 | 2010-06-30 | 无锡麟龙铝业有限公司 | Method for immersion-plating titanium alloy parts |
| CN101768747A (en) * | 2009-12-28 | 2010-07-07 | 无锡麟龙铝业有限公司 | Method for carrying out surface activating treatment on surface of titanium alloy |
| JP2013216940A (en) * | 2012-04-09 | 2013-10-24 | Mitsubishi Electric Corp | Method for plating metallic material, and composite electrode of solid polyelectrolyte membrane and catalytic metal |
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2014
- 2014-03-26 CN CN201410116380.5A patent/CN103849865A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0832965B2 (en) * | 1992-10-02 | 1996-03-29 | 株式会社日本アルミ | Pretreatment method for plating titanium material |
| JPH06248489A (en) * | 1993-02-22 | 1994-09-06 | Tanaka Kikinzoku Kogyo Kk | Method for treatment before plating for corrosion resistant material |
| US20040188261A1 (en) * | 2003-03-27 | 2004-09-30 | Scimed Life Systems, Inc. | Methods of forming medical devices |
| CN101760714A (en) * | 2009-12-28 | 2010-06-30 | 无锡麟龙铝业有限公司 | Method for immersion-plating titanium alloy parts |
| CN101768747A (en) * | 2009-12-28 | 2010-07-07 | 无锡麟龙铝业有限公司 | Method for carrying out surface activating treatment on surface of titanium alloy |
| JP2013216940A (en) * | 2012-04-09 | 2013-10-24 | Mitsubishi Electric Corp | Method for plating metallic material, and composite electrode of solid polyelectrolyte membrane and catalytic metal |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107119296A (en) * | 2017-06-27 | 2017-09-01 | 中国人民解放军第五七九工厂 | A kind of method of anode activation titanium alloy electro-coppering |
| CN109295485A (en) * | 2018-09-28 | 2019-02-01 | 江苏永昊高强度螺栓有限公司 | A kind of electroplating technology of high-strength bolt |
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Application publication date: 20140611 |