CN105220195A - The husky nickel electroplating technology of a kind of arrangements for automotive doors handle - Google Patents

Abstract

The invention provides the husky nickel electroplating technology of a kind of arrangements for automotive doors handle, comprise the steps: 1) oil removing; 2) expand; 3) alligatoring; 4) reduce; 5) preimpregnation; 6) activate; 7) dispergation; 8) electroplate.Described technique is improved plastic basis material electroplating pretreatment process, whole technological process environmental protection, toxicological harmless, adopt special sand nickel plating solution, without the need to using electroless plating, operation is more prone to, and technology stability improves, wastewater treatment is simple, substantially reduce the production time, produce midway without the need to changing hanger, productivity improves greatly.

Description

The husky nickel electroplating technology of a kind of arrangements for automotive doors handle

Technical field

The present invention relates to the husky nickel electroplating technology of a kind of arrangements for automotive doors handle.

Background technology

Plating (Electroplating) is exactly the process utilizing electrolysis principle to plate other metal or alloy of skim on substrate material surface, be utilize electrolytic action to make the technique of the surface attachment layer of metal film of metal or other material thus play to prevent burning (as corrosion), improve the effects such as wear resistance, electroconductibility, reflective, erosion resistance (copper sulfate etc.) and having improved aesthetic appearance.

Wherein, the body material of plating, except the cast iron of iron-based, steel and stainless steel, also has non-ferrous metal, or ABS plastic, polypropylene, polysulfones and phenoplast, electroplates, be namely referred to as plastic electroplating on plastic basis material surface.Plastic electroplating product has the advantages such as lightweight, easily processing, surface luster property and Surface flat are good, applies widely in automobile, motorcycle, five metals and daily houseware.

Plastic electroplating conventional process comprises two kinds: water power plating and vacuum plating.

Wherein, water power plates because technique is comparatively simple, and slave unit must be asked to environment does not all have vacuum ion plating harsh, thus is widely used.

Husky nickel also claims pearl nickel, forging face nickel and pitted skin nickel, and this technique just grew up in recent years.Due to, the product no-reflection that this technique electroplates out, produces slow reflection during high light direct projection, dazzle-free, feel lubrication is comfortable, again without fingerprint, firmly gets user's welcome.

According to the difference of husky agent used, the product plated out, husky thin have sub dued lustre as pearl, and husky thick tool sandblasts shape effect, and naked-eye observation has uniform and delicate, smoothly intensive grains of sand shape.

Husky nickel can plate the metal of various color and luster, common are the platings such as chromium, gold and silver, rifle look, imitative gold, make its decorative effect stronger.Above-mentioned metal is coated with electrocoating paint desert again, and obtain direct-view outward appearance smoothly bright, have again the sand-like of exquisiteness through paint film, effect is better.At present, this plating has been widely used in the industries such as automobile decoration, electronic product appearance component, haberdashery and hardware, cultural goods.

Obtain husky nickel or husky pearl nickel, be adopt solid non-conductive particulate in the past, under plating solution strong stirring, particulate and nickel dam codeposition are embedded in coating.The husky nickel obtained in this way, can according to the thickness of particulate, and the length of electroplating time obtains the Shamian Island effect that thickness is different.But Shamian Island is uneven sometimes, the particularly product of complex geometry, and production technique is numerous, requires also high to coating bath peripheral equipment.

Other method carries out sandblasting on matrix after process electroplating again.The method also can obtain various Shamian Island effect according to the thickness of sandblasting time institute sandblasting grain.If adopt glass ball to spray without silicon carbide, then the product gloss electroplating out is quite soft, and decorative effect is better, and shortcoming can only be constructed, as brass, zinc alloy etc. to softer base material; The workpiece higher to hardness, as steel part effect is then poor.Another shortcoming of sandblasting is that labour intensity is large, and speed is slow, then has the product after sandblasting can not have slight friction, collision, otherwise the workpiece plated out also has vestige.The additive of part in electronickelling that sandblast preferably adopts the intermediate without strong Surface flat.

But husky nickel (or pearl nickel) electroplating technology common is at present electroplate on metal base surface mostly, and the husky nickel electroplating technology for the plastic basis material surface in injection moulding is less.

At present, the husky nickel (or pearl nickel) for plastic basis material is electroplated, the following patent documentation of domestic existence:

China Patent Publication No.: 104178794A, disclose a kind of pearl nickel handlebar process of surface treatment, the plastic component after half bright nickel is plated pearl nickel after acid activation, described pearl nickel bath concentration is 430g/L-530g/L, temperature 40-60 degree, the PH of pearl nickel plating solution is 3.5-5.0; The surface treatment time 2-15 minute of plastic component.Wherein the composition of pearl nickel plating solution comprises: single nickel salt, nickelous chloride, boric acid, pearl nickel P1, pearl nickel P2 and sand agent LS-2.This patent is adjusted by the tank liquor concentration of effects on surface process line pearl nickel and surface treatment time parameter, uses sand agent of the same race, produces various product, improves quality level, has saved production cost simultaneously.But the treatment process that this patent provides, pearl nickel solution composition is simple, and do not add any brightening agent or emulsifying agent, the brightness effect of pearl nickel coating is bad, not soft.

Summary of the invention

For solving above-mentioned Problems existing, the object of the present invention is to provide the husky nickel electroplating technology of a kind of arrangements for automotive doors handle, described technique is improved plastic basis material electroplating pretreatment process, whole technological process environmental protection, toxicological harmless, adopt special sand nickel plating solution, without the need to using electroless plating, operation is more prone to, and technology stability improves, wastewater treatment is simple, substantially reduce the production time, produce midway without the need to changing hanger, productivity improves greatly.

For achieving the above object, technical scheme of the present invention is:

The husky nickel electroplating technology of a kind of arrangements for automotive doors handle, comprises the steps:

1) oil removing

Oil removing, dust removal process are carried out to the arrangements for automotive doors handle plastic basis material surface of injection moulding, then puts into rinse bath water and rinse clean;

2) alligatoring

Plastic basis material is sent into alligatoring liquid bath and carry out roughening treatment, then put into rinse bath clear water water and rinse clean, Coarsening Temperature 70 ~ 75 DEG C, coarsening time 3 ~ 7min, in described alligatoring liquid bath, coarsening solution is high chromic acid content type coarsening solution, by 600 ~ 800g/LH ₂sO ₄, 50 ~ 100g/L CrO ₃and the Pd of 10 ~ 20mg/L ²⁺add water to 1L to be mixed to form;

3) reduce

Plastic basis material after alligatoring is sent in reducing bath and carries out reduction treatment, put into rinse bath clear water after process to rinse, comprise the agent of 40 ~ 50g/L hydrazine hydrate reduction in reducing bath, the hydrochloric acid of 40 ~ 60g/L and the adjustment agent of 1g/L, reduction temperature is room temperature, recovery time 1 ~ 3min;

4) preimpregnation

Sent in pre-immersion trough by plastic basis material after reduction treatment and carry out preimpregnation, put into rinse bath clear water after preimpregnation and rinse, the presoak in pre-immersion trough is the hydrochloric acid of 200 ~ 250g/L, and temperature is room temperature, preimpregnation time 0.5 ~ 1min;

5) activate

Plastic basis material after preimpregnation is sent into activated bath activate, the activation solution in activated bath is Pd-Sn activation solution, and temperature is room temperature, soak time 10 ~ 15min;

6) dispergation

Plastic basis material after activation treatment is sent into dispergation groove and carries out dispergation, the solution glue in dispergation groove is the hydrochloric acid of 80 ~ 100g/L, temperature 30 ~ 40 DEG C, time 5 ~ 10min;

7) electroplate

With the plastic basis material after dispergation process for negative electrode, with nickel plate for anode, put into husky nickel plating solution, electroplate, form the husky nickel dam of one deck on described plastic basis material surface, described husky nickel plating solution concentration is 450 ~ 500g/L, current density 3 ~ 8A/dm ², electroplating time 5 ~ 8min, bath pH values is 4.5 ~ 5.5, temperature 40 ~ 50 DEG C.

Further, described plastic basis material is Plating grade ABS plastic.

Separately, described adjustment agent is the NoviganthPA adjustment agent that Atotech Chemical Co., Ltd. produces.

Separately have, described husky nickel plating solution comprises single nickel salt 300 ~ 350g/L, nickelous chloride 20 ~ 30g/L, boric acid 30 ~ 40g/L, brightening agent 5 ~ 10g/L, and play husky agent 1 ~ 5g/L, walk agent 5 ~ 10g/L.

Preferably, described husky nickel plating solution comprises single nickel salt 300g/L, nickelous chloride 20g/L, boric acid 35g/L, brightening agent 10g/L, and play husky agent 1g/L, walk agent 5g/L.

And, described in the agent that walks be any one or any several composition in polyoxyethylene aliphatic alcohol ether class or polyxyethylated alkylphenol class or high molecular polyether.

Separately, described husky agent comprises the dioctyl amber acid ester of 1 ~ 1.5g/L and the higher fatty acid sodium of 0.5 ~ 1.5g/L.

Further, described brightening agent comprises the composition of following mass percent: asccharin: 30 ~ 40wt%, sodium allyl sulfonate: 10 ~ 20wt%, propargyl sodium sulfonate: 10 ~ 15wt%, sodium vinyl sulfonate: 1 ~ 5wt%, surplus is water.

And described Pd-Sn activation solution comprises:

Component A:

PdCl ₂: 1 ~ 5g/L, SnCl ₂2H ₂o:2 ~ 3g/L, distilled water 200 ~ 300g/L, hydrochloric acid 50 ~ 100g/L;

B component:

SnCl ₂2H ₂o:60 ~ 80g/L, Na ₂snO ₃3H ₂o:5 ~ 10g/L, hydrochloric acid: 150 ~ 200g/L.

Separately, the preparation of described Pd-Sn activation solution comprises the steps:

A) component A preparation

By solid PdCl ₂be dissolved in the mixed solution of hydrochloric acid and distilled water, under the condition of 25 ~ 35 DEG C, add SnCl ₂2H ₂o, stirring reaction 10 ~ 15min;

B) B component preparation

By SnCl ₂2H ₂o is added in hydrochloric acid, is stirred to and dissolves completely, then adds Na ₂snO ₃3H ₂o, makes white emulsion;

C) mix

By the B component prepared under continuous stirring, slowly pour in component A, rare to 1L, just obtain auburn sensitization activation solution, at 40 ~ 45 DEG C, be incubated 3h, obtain described Pd-Sn activation solution.

Beneficial effect of the present invention is:

Design special coarsening solution, coarsening solution is long for duration of service, the roughening treatment time is short, do not need frequent adjustment, have stronger alligatoring ability to Plating grade ABS plastic, chromic acid Main Function is the divinyl in oxidation ABS, forms anchor chalaza, frosting is made to generate more hydrophilic polar group, as=C=O ,-OH ,-SO ₃h and-COOH etc., the existence of these groups, drastically increases the wetting ability of frosting, is conducive to Chemical bond, thus improves the bonding force of coating.And sulfuric acid can react with vinylbenzene, increase the bonding force of palladium;

Reduction operation mainly reduces the sexavalent chrome of frosting, prevent the plating solution of subsequent handling by hexavalent chromium polluted and cause degradation, particularly activate plating solution, add special adjustment agent, microetch is carried out to plastic basis material surface, make frosting charged, increase palladium adsorptive power, be conducive to the heavy palladium effect of subsequent activation operation palladium, make to be difficult to ABS or the PC plastics electroplated containing PC and be easy to plating, and after described NoviganthPA adjustment agent rinse water sodium hydroxide or calcium hydroxide neutralization precipitation, directly can be disposed to waste water treatment plant's process;

Adopt special Pd-Sn activation solution, make sensitization, activate and carry out in a step, use colloidal pd activation solution gained plating piece, in smooth finish, bonding force etc., not second to the situation of sensitization activation proceed step by step.Good stability, safeguard, use all more convenient, required operation simplifies greatly;

Adopt special, special husky nickel plating solution, special husky agent and brightening agent is designed in electroplate liquid, rise husky agent and brightening agent coordinated good, ensure that sand evenly can be played in plastic basis material surface, rise husky effective, and the husky nickel coating white appearance obtained, luminosity is soft, be smooth to the touch, and glossy, good brightness.Control suitable electroplating temperature, when temperature is too low, the product not having husky sense plates out; Temperature height then rises husky fast.But temperature is too high, emulsion droplet easily condenses, and tank liquor is easily aging, and life cycle can shorten.

Embodiment

Following examples for illustration of the present invention, but can not be used for limiting the scope of the invention.The implementation condition adopted in embodiment can be for further adjustments according to the condition of producer, and unaccounted implementation condition is generally conventional laboratory conditions.

The husky nickel electroplating technology of a kind of arrangements for automotive doors handle of the present invention, comprises the steps:

1) oil removing

Oil removing, dust removal process are carried out to the arrangements for automotive doors handle plastic basis material surface of injection moulding, then puts into rinse bath water and rinse clean;

2) alligatoring

Plastic basis material is sent into alligatoring liquid bath and carry out roughening treatment, then put into rinse bath clear water water and rinse clean, Coarsening Temperature 70 ~ 75 DEG C, coarsening time 3 ~ 7min, in described alligatoring liquid bath, coarsening solution is high chromic acid content type coarsening solution, by 600 ~ 800g/LH ₂sO ₄, 50 ~ 100g/L CrO ₃and the Pd of 10 ~ 20mg/L ²⁺add water to 1L to be mixed to form;

3) reduce

Plastic basis material after alligatoring is sent in reducing bath and carries out reduction treatment, put into rinse bath clear water after process to rinse, comprise the agent of 40 ~ 50g/L hydrazine hydrate reduction in reducing bath, the hydrochloric acid of 40 ~ 60g/L and the adjustment agent of 1g/L, reduction temperature is room temperature, recovery time 1 ~ 3min;

4) preimpregnation

Sent in pre-immersion trough by plastic basis material after reduction treatment and carry out preimpregnation, put into rinse bath clear water after preimpregnation and rinse, the presoak in pre-immersion trough is the hydrochloric acid of 200 ~ 250g/L, and temperature is room temperature, preimpregnation time 0.5 ~ 1min;

5) activate

Plastic basis material after preimpregnation is sent into activated bath activate, the activation solution in activated bath is Pd-Sn activation solution, and temperature is room temperature, soak time 10 ~ 15min;

6) dispergation

Plastic basis material after activation treatment is sent into dispergation groove and carries out dispergation, the solution glue in dispergation groove is the hydrochloric acid of 80 ~ 100g/L, temperature 30 ~ 40 DEG C, time 5 ~ 10min;

7) electroplate

With the plastic basis material after dispergation process for negative electrode, with nickel plate for anode, put into husky nickel plating solution, electroplate, form the husky nickel dam of one deck on described plastic basis material surface, described husky nickel plating solution concentration is 450 ~ 500g/L, current density 3 ~ 8A/dm ², electroplating time 5 ~ 8min, bath pH values is 4.5 ~ 5.5, temperature 40 ~ 50 DEG C.

Further, described plastic basis material is Plating grade ABS plastic.

Separately, described adjustment agent is the NoviganthPA adjustment agent that Atotech Chemical Co., Ltd. produces.

And described Pd-Sn activation solution comprises:

Component A:

PdCl ₂: 1 ~ 5g/L, SnCl ₂2H ₂o:2 ~ 3g/L, distilled water 200 ~ 300g/L, hydrochloric acid 50 ~ 100g/L;

B component:

SnCl ₂2H ₂o:60 ~ 80g/L, Na ₂snO ₃3H ₂o:5 ~ 10g/L, hydrochloric acid: 150 ~ 200g/L.

Separately, the preparation of described Pd-Sn activation solution comprises the steps:

A) component A preparation

By solid PdCl ₂be dissolved in the mixed solution of hydrochloric acid and distilled water, under the condition of 25 ~ 35 DEG C, add SnCl ₂2H ₂o, stirring reaction 10 ~ 15min;

B) B component preparation

By SnCl ₂2H ₂o is added in hydrochloric acid, is stirred to and dissolves completely, then adds Na ₂snO ₃3H ₂o, makes white emulsion;

C) mix

By the B component prepared under continuous stirring, slowly pour in component A, rare to 1L, just obtain auburn sensitization activation solution, at 40 ~ 45 DEG C, be incubated 3h, obtain described Pd-Sn activation solution.

Wherein, the husky nickel electroplating technology of arrangements for automotive doors handle of the present invention each embodiment medium sand nickel plating solution ingredient lists is as shown in table 1.Play husky agent in each embodiment and the list of brightening agent each composition component is as shown in table 2, in described each embodiment brightening agent moiety, surplus is water.

Separately have, described husky nickel plating solution comprises single nickel salt 300 ~ 350g/L, nickelous chloride 20 ~ 30g/L, boric acid 30 ~ 40g/L, brightening agent 5 ~ 10g/L, and play husky agent 1 ~ 5g/L, walk agent 5 ~ 10g/L.

Table 1. (unit: g/L)

	Embodiment 1	Embodiment 2	Embodiment 3	Embodiment 4	Embodiment 5
						Single nickel salt	300	350	330	320	310
Nickelous chloride	20	25	28	30	23
						Boric acid	35	40	38	30	33

Brightening agent	10	8	6	5	7
						Play husky agent	1	3	4	5	2
Walk agent	5	8	10	7	6

Wherein, the agent that walks described in table 1 is any one or any several composition in polyoxyethylene aliphatic alcohol ether class or polyxyethylated alkylphenol class or high molecular polyether.

Table 2.

It should be noted that, above embodiment is only in order to illustrate technical scheme of the present invention and unrestricted.Although with reference to preferred embodiment to invention has been detailed description, those of ordinary skill in the art is to be understood that, can modify to the technical scheme of invention or equivalent replacement, and not depart from the scope of technical solution of the present invention, it all should be encompassed in right of the present invention.

Claims (10)

1. the husky nickel electroplating technology of arrangements for automotive doors handle, is characterized in that, comprise the steps:

1) oil removing

Oil removing, dust removal process are carried out to the arrangements for automotive doors handle plastic basis material surface of injection moulding, then puts into rinse bath water and rinse clean;

2) alligatoring

Plastic basis material is sent into alligatoring liquid bath and carry out roughening treatment, then put into rinse bath clear water water and rinse clean, Coarsening Temperature 70 ~ 75 DEG C, coarsening time 3 ~ 7min, in described alligatoring liquid bath, coarsening solution is high chromic acid content type coarsening solution, by 600 ~ 800g/LH ₂sO ₄, 50 ~ 100g/L CrO ₃and the Pd of 10 ~ 20mg/L ²⁺add water to 1L to be mixed to form;

3) reduce

Plastic basis material after alligatoring is sent in reducing bath and carries out reduction treatment, put into rinse bath clear water after process to rinse, comprise the agent of 40 ~ 50g/L hydrazine hydrate reduction in reducing bath, the hydrochloric acid of 40 ~ 60g/L and the adjustment agent of 1g/L, reduction temperature is room temperature, recovery time 1 ~ 3min;

4) preimpregnation

Sent in pre-immersion trough by plastic basis material after reduction treatment and carry out preimpregnation, put into rinse bath clear water after preimpregnation and rinse, the presoak in pre-immersion trough is the hydrochloric acid of 200 ~ 250g/L, and temperature is room temperature, preimpregnation time 0.5 ~ 1min;

5) activate

Plastic basis material after preimpregnation is sent into activated bath activate, the activation solution in activated bath is Pd-Sn activation solution, and temperature is room temperature, soak time 10 ~ 15min;

6) dispergation

Plastic basis material after activation treatment is sent into dispergation groove and carries out dispergation, the solution glue in dispergation groove is the hydrochloric acid of 80 ~ 100g/L, temperature 30 ~ 40 DEG C, time 5 ~ 10min;

7) electroplate

With the plastic basis material after dispergation process for negative electrode, with nickel plate for anode, put into husky nickel plating solution, electroplate, form the husky nickel dam of one deck on described plastic basis material surface, described husky nickel plating solution concentration is 450 ~ 500g/L, current density 3 ~ 8A/dm ², electroplating time 5 ~ 8min, bath pH values is 4.5 ~ 5.5, temperature 40 ~ 50 DEG C.

2. the husky nickel electroplating technology of a kind of arrangements for automotive doors handle according to claim 1, it is characterized in that, described plastic basis material is Plating grade ABS plastic.

3. the husky nickel electroplating technology of a kind of arrangements for automotive doors handle according to claim 1, is characterized in that, described adjustment agent is the NoviganthPA adjustment agent that Atotech Chemical Co., Ltd. produces.

4. the husky nickel electroplating technology of a kind of arrangements for automotive doors handle according to claim 1, it is characterized in that, described husky nickel plating solution comprises single nickel salt 300 ~ 350g/L, nickelous chloride 20 ~ 30g/L, boric acid 30 ~ 40g/L, brightening agent 5 ~ 10g/L, play husky agent 1 ~ 5g/L, walk agent 5 ~ 10g/L.

5. the husky nickel electroplating technology of a kind of arrangements for automotive doors handle according to claim 4, it is characterized in that, described husky nickel plating solution comprises single nickel salt 300g/L, nickelous chloride 20g/L, boric acid 35g/L, brightening agent 10g/L, and play husky agent 1g/L, walk agent 5g/L.

6. the husky nickel electroplating technology of a kind of arrangements for automotive doors handle according to claim 4 or 5, is characterized in that, described in the agent that walks be any one or any several composition in polyoxyethylene aliphatic alcohol ether class or polyxyethylated alkylphenol class or high molecular polyether.

7. the husky nickel electroplating technology of a kind of arrangements for automotive doors handle according to claim 4 or 5, it is characterized in that, described husky agent comprises the dioctyl amber acid ester of 1 ~ 1.5g/L and the higher fatty acid sodium of 0.5 ~ 1.5g/L.

8. the husky nickel electroplating technology of a kind of arrangements for automotive doors handle according to claim 4 or 5, it is characterized in that, described brightening agent comprises the composition of following mass percent: asccharin: 30 ~ 40wt%, sodium allyl sulfonate: 10 ~ 20wt%, propargyl sodium sulfonate: 10 ~ 15wt%, sodium vinyl sulfonate: 1 ~ 5wt%, surplus is water.

9. the husky nickel electroplating technology of a kind of arrangements for automotive doors handle according to claim 1, it is characterized in that, described Pd-Sn activation solution comprises:

Component A:

PdCl ₂: 1 ~ 5g/L, SnCl ₂2H ₂o:2 ~ 3g/L, distilled water 200 ~ 300g/L, hydrochloric acid 50 ~ 100g/L;

B component:

SnCl ₂2H ₂o:60 ~ 80g/L, Na ₂snO ₃3H ₂o:5 ~ 10g/L, hydrochloric acid: 150 ~ 200g/L.

10. the husky nickel electroplating technology of a kind of arrangements for automotive doors handle according to claim 9, it is characterized in that, the preparation of described Pd-Sn activation solution comprises the steps:

Component A prepares

By solid PdCl ₂be dissolved in the mixed solution of hydrochloric acid and distilled water, under the condition of 25 ~ 35 DEG C, add SnCl ₂2H ₂o, stirring reaction 10 ~ 15min;

B component is prepared

By SnCl ₂2H ₂o is added in hydrochloric acid, is stirred to and dissolves completely, then adds Na ₂snO ₃3H ₂o, makes white emulsion;

Mixing

By the B component prepared under continuous stirring, slowly pour in component A, rare to 1L, just obtain auburn sensitization activation solution, at 40 ~ 45 DEG C, be incubated 3h, obtain described Pd-Sn activation solution.