CN105297035A - Aluminum material surface treatment process of vehicle damping part - Google Patents
Aluminum material surface treatment process of vehicle damping part Download PDFInfo
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- CN105297035A CN105297035A CN201510575431.5A CN201510575431A CN105297035A CN 105297035 A CN105297035 A CN 105297035A CN 201510575431 A CN201510575431 A CN 201510575431A CN 105297035 A CN105297035 A CN 105297035A
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Abstract
The invention discloses an aluminum material surface treatment process of a vehicle damping part. The process comprises a degreasing step, a primary water washing step, a primary hot water washing step, a passivating step, a secondary water washing step, a secondary hot water washing step and a drying step. The process has the following technical effects: an aluminum product can obtain higher bonding force compared with a rubber material under the condition of not damaging a thread hole through shot blasting and sand blasting; and meanwhile, the process adopts the chromate-free passivation treatment to form a transparent chromate-free film on the surface of the aluminum product, so that the protection of environment and human safety is facilitated when the corrosion resistance of the aluminum product of the vehicle damping part and the bonding rubber performance are improved.
Description
Technical field
The present invention relates to a kind of automobile shock part aluminium material surface treatment process, be specially adapted to containing threaded hole and need with the aluminium of rubber bound.
Background technology
At present, the automobile shock part containing threaded hole is owing to assembling simple and direct, positioning stablity and more and more general.And the automobile shock part that aluminium and the rubber bound containing threaded hole is produced, can either be convenient to assembling also can alleviate tare, improves energy consumption service efficiency, reduction carbon emission.This kind of aluminium, be generally by do not have the aluminum component of threaded hole after surface treatment with rubber bound, then on lathe, attack auger shell pit, the cutting coolant used when attacking hole has shock absorber part and pollutes and corrosion, therefore also will be cleaned up.And the process of cleaning also to a certain extent can corrosion failure shock absorber part.This technical process is more loaded down with trivial details, efficiency is lower, the energy and human cost higher, and there is cutting coolant and deal with improperly, to the disadvantageous effect of the performance of shock absorber part.
Summary of the invention
The object of the invention is to overcome the deficiencies in the prior art, a kind of automobile shock part aluminium material surface treatment process is provided, to environment and the harm of person nothing, make the aluminium material surface containing threaded hole formed a kind of containing heavy metal chromium, corrosion-resistantly possess again the film having stronger cohesive force with rubber, and technical process is simple and direct, comprehensive cost is low, have no adverse effect to part performance.
A kind of technical scheme realizing above-mentioned purpose is: a kind of automobile shock part aluminium material surface treatment process, comprises the following steps:
S1, defatting step: add degreasing tank liquor in groove cylinder skimming treatment is carried out to aluminium material surface, described degreasing tank liquor adopts concentration to be the cleaning solution of 0.5%-2%, aluminium scavenging period in this degreasing tank liquor is 540 ± 5s, the temperature of degreasing tank liquor is 65 ± 5 DEG C, and ensures that the concentration of cleaning solution in degreasing tank liquor is 0.5%-2% by acid base titration;
S2, water-washing step for the first time: adopt twice normal-temperature water washing trough liquid to carry out first time to the aluminium through skimming treatment and wash process, remove the degreasing tank liquor that aluminium material surface is residual, the washing time of per pass normal-temperature water washing trough liquid is 120 ± 5s, and normal-temperature water washing trough liquid is changed once every three working dayss;
S3, hot water wash step for the first time: use hot water wash tank liquor to carry out first time hot water wash process to the aluminium through washing process, the degreasing tank liquor that further process is residual and normal-temperature water washing trough liquid, described hot water wash tank liquor adopts deionized water, the hot water wash treatment time of hot water wash tank liquor is 120 ± 5s, the temperature of hot water wash tank liquor is 65 ± 5 DEG C, spillway discharge 200-500 l/h, and specific conductivity is less than 1000 μ S/cm;
S4, passivation step: adding in groove cylinder containing mass percent is the passivation tank liquor of the chrome-free tanning agent of 5%-8%, Passivation Treatment is carried out to the aluminium material surface through first time hot water wash process, Passivation Treatment temperature is 20 DEG C-40 DEG C, the Passivation Treatment time is 240 ± 5s, and ensures that the concentration of chrome-free tanning agent in passivation tank liquor is between 5%-8% by acid base titration;
S5, second time water-washing step: adopt twice deionized water at normal temperature tank liquor to carry out second time to the aluminium through Passivation Treatment and wash process, remove the passivation tank liquor that aluminium material surface is residual, the washing treatment time of front one deionized water at normal temperature tank liquor is 70 ± 5s, and the pH value of controlling water kick flow Shi Gai road deionized water at normal temperature tank liquor is between 2.0-7.0; The washing treatment time of rear one deionized water at normal temperature tank liquor is 60 ± 5s, and the conductivity value of controlling water kick flow Shi Gai road deionized water at normal temperature tank liquor is less than 200 μ S/cm;
S6, second time hot water wash step: use hot water wash tank liquor to carry out the process of second time hot water wash to the aluminium through second time washing process, described hot water wash tank liquor adopts deionized water, the passivation tank liquor that further process is residual and deionized water at normal temperature tank liquor, the time of second time hot water wash process is 60 ± 5s, the temperature of this hot water wash tank liquor is 65 ± 5 DEG C, spillway discharge 100-160 l/h, and conductivity value is less than 50 μ S/cm;
S7, baking step: use circulating air to dry the aluminium through the process of second time hot water wash, the temperature of circulating air is 80-100 DEG C, and drying time is 600 ± 5s.
Above-mentioned a kind of automobile shock part aluminium material surface treatment process, in described defatting step, described cleaning solution comprises the component of following weight percent:
The weight percent sum of above-mentioned all components is 100%.
Have employed the technical scheme of a kind of automobile shock part aluminium material surface treatment process of the present invention, can when not ball blast sandblasting destroys threaded hole, aluminium is made to obtain the cohesive force higher with elastomeric material, this technique adopts chromium-free deactivation process simultaneously, Passivation Treatment first can remove the zone of oxidation of aluminium material surface, carry out chromium-free deactivation simultaneously, make the formation speed of new aluminium oxide layers drop to Schwellenwert, and the chromium-free deactivation film corrosion resistant performance and stronger with rubber bonding force formed; Aluminium material surface is formed transparent in chromium thin film, while the Corrosion Protection improving automobile shock part aluminium and sticking rubber performance, be conducive to protection of the environment and personnel safety.
Accompanying drawing explanation
Fig. 1 is the result figure that the automobile rubber metal shock absorber part normal temperature state pressure-off glue after aluminium uses process of surface treatment process of the present invention is tested.
Embodiment
The present inventor, in order to understand technical scheme of the present invention better, is described in detail below by embodiment particularly:
Embodiments of the invention, a kind of automobile shock part aluminium material surface treatment process, comprises the following steps:
S1, defatting step: add degreasing tank liquor in groove cylinder skimming treatment is carried out to aluminium material surface, degreasing tank liquor adopts concentration to be the cleaning solution of 0.5%-2%, aluminium scavenging period in this degreasing tank liquor is 540 ± 5s, the temperature of degreasing tank liquor is 65 ± 5 DEG C, and ensures that the concentration of cleaning solution in degreasing tank liquor is 0.5%-2% by acid base titration;
In defatting step, cleaning solution comprises the component of following weight percent:
The weight percent sum of above-mentioned all components is 100%.
S2, water-washing step for the first time: adopt twice normal-temperature water washing trough liquid to carry out first time to the aluminium through skimming treatment and wash process, remove the degreasing tank liquor that aluminium material surface is residual, the washing time of per pass normal-temperature water washing trough liquid is 120 ± 5s, and normal-temperature water washing trough liquid is changed once every three working dayss;
S3, hot water wash step for the first time: use hot water wash tank liquor to carry out first time hot water wash process to the aluminium through washing process, the degreasing tank liquor that further process is residual and normal-temperature water washing trough liquid, described hot water wash tank liquor adopts deionized water, the hot water wash treatment time of hot water wash tank liquor is 120 ± 5s, the temperature of hot water wash tank liquor is 65 ± 5 DEG C, spillway discharge 200-500 l/h, and specific conductivity is less than 1000 μ S/cm;
S4, passivation step: adding in groove cylinder containing mass percent is the passivation tank liquor of the chrome-free tanning agent of 5%-8%, Passivation Treatment is carried out to the aluminium material surface through first time hot water wash process, Passivation Treatment temperature is 20 DEG C-40 DEG C, the Passivation Treatment time is 240 ± 5s, and ensures that the concentration of chrome-free tanning agent in passivation tank liquor is between 5%-8% by acid base titration; Passivation Treatment first can remove the zone of oxidation of aluminium material surface, carries out chromium-free deactivation simultaneously, makes the formation speed of new aluminium oxide layers drop to Schwellenwert, and the chromium-free deactivation film corrosion resistant performance and stronger with rubber bonding force formed;
S5, second time water-washing step: adopt twice deionized water at normal temperature tank liquor to carry out second time to the aluminium through Passivation Treatment and wash process, remove the passivation tank liquor that aluminium material surface is residual, the washing treatment time of front one deionized water at normal temperature tank liquor is 70 ± 5s, and the pH value of controlling water kick flow Shi Gai road deionized water at normal temperature tank liquor is between 2.0-7.0; The washing treatment time of rear one deionized water at normal temperature tank liquor is 60 ± 5s, and the conductivity value of controlling water kick flow Shi Gai road deionized water at normal temperature tank liquor is less than 200 μ S/cm;
S6, second time hot water wash step: use hot water wash tank liquor to carry out the process of second time hot water wash to the aluminium through second time washing process, described hot water wash tank liquor adopts deionized water, the passivation tank liquor that further process is residual and deionized water at normal temperature tank liquor, the time of second time hot water wash process is 60 ± 5s, the temperature of this hot water wash tank liquor is 65 ± 5 DEG C, spillway discharge 100-160 l/h, and conductivity value is less than 50 μ S/cm;
S7, baking step: use circulating air to dry the aluminium through the process of second time hot water wash, the temperature of circulating air is 80-100 DEG C, and drying time is 600 ± 5s.
Daimler automobile chassis traditional rubber metalwork is chosen in this experiment, metal-coating is aluminium, choose five parts, i.e. part 1-5, be enclosed within ball blast outside each aluminum and after polluting, continue process according to aluminium material surface treatment process of the present invention, the experiment of normal temperature state pressure-off glue implemented by each part after sulfuration, test speed is 100mm/min, test result as shown in figure 1 and table 1:
| Part sequence number | Ultimate load (kN) | Displacement (mm) | To come unstuck mode |
| 1 | 21.90 | 40.61 | 100% rubber failure |
| 2 | 20.27 | 39.01 | 100% rubber failure |
| 3 | 23.18 | 41.31 | 100% rubber failure |
| 4 | 20.25 | 40.18 | 100% rubber failure |
| 5 | 24.84 | 42.25 | 100% rubber failure |
Table 1
Result shows, according to the aluminum component of aluminium material surface treatment process of the present invention process, after boning with the vulcanization of rubber, when part loading demands can be met, there is not the destruction between aluminum overcoat and binding agent, be rubber place to destroy, therefore this technique be a kind of to environment and the person without harm, the aluminium material surface containing threaded hole formed a kind ofly do not contain heavy metal chromium, corrosion-resistantly possess again the film having stronger cohesive force with rubber, and technical process is simple and direct, comprehensive cost is low, the aluminium material surface treatment process that has no adverse effect to part performance.
Those of ordinary skill in the art will be appreciated that, above embodiment is only used to the present invention is described, and be not used as limitation of the invention, as long as in spirit of the present invention, all will drop in Claims scope of the present invention the change of the above embodiment, modification.
Claims (2)
1. an automobile shock part aluminium material surface treatment process, is characterized in that, comprise the following steps:
S1, defatting step: add degreasing tank liquor in groove cylinder skimming treatment is carried out to aluminium material surface, described degreasing tank liquor adopts concentration to be the cleaning solution of 0.5%-2%, aluminium scavenging period in this degreasing tank liquor is 540 ± 5s, the temperature of degreasing tank liquor is 65 ± 5 DEG C, and ensures that the concentration of cleaning solution in degreasing tank liquor is 0.5%-2% by acid base titration;
S2, water-washing step for the first time: adopt twice normal-temperature water washing trough liquid to carry out first time to the aluminium through skimming treatment and wash process, remove the degreasing tank liquor that aluminium material surface is residual, the washing time of per pass normal-temperature water washing trough liquid is 120 ± 5s, and normal-temperature water washing trough liquid is changed once every three working dayss;
S3, hot water wash step for the first time: use hot water wash tank liquor to carry out first time hot water wash process to the aluminium through washing process, the degreasing tank liquor that further process is residual and normal-temperature water washing trough liquid, described hot water wash tank liquor adopts deionized water, the hot water wash treatment time of hot water wash tank liquor is 120 ± 5s, the temperature of hot water wash tank liquor is 65 ± 5 DEG C, spillway discharge 200-500 l/h, and specific conductivity is less than 1000 μ S/cm;
S4, passivation step: adding in groove cylinder containing mass percent is the passivation tank liquor of the chrome-free tanning agent of 5%-8%, Passivation Treatment is carried out to the aluminium material surface through first time hot water wash process, Passivation Treatment temperature is 20 DEG C-40 DEG C, the Passivation Treatment time is 240 ± 5s, and ensures that the concentration of chrome-free tanning agent in passivation tank liquor is between 5%-8% by acid base titration;
S5, second time water-washing step: adopt twice deionized water at normal temperature tank liquor to carry out second time to the aluminium through Passivation Treatment and wash process, remove the passivation tank liquor that aluminium material surface is residual, the washing treatment time of front one deionized water at normal temperature tank liquor is 70 ± 5s, and the pH value of controlling water kick flow Shi Gai road deionized water at normal temperature tank liquor is between 2.0-7.0; The washing treatment time of rear one deionized water at normal temperature tank liquor is 60 ± 5s, and the conductivity value of controlling water kick flow Shi Gai road deionized water at normal temperature tank liquor is less than 200 μ S/cm;
S6, second time hot water wash step: use hot water wash tank liquor to carry out the process of second time hot water wash to the aluminium through second time washing process, described hot water wash tank liquor adopts deionized water, the passivation tank liquor that further process is residual and deionized water at normal temperature tank liquor, the time of second time hot water wash process is 60 ± 5s, the temperature of this hot water wash tank liquor is 65 ± 5 DEG C, spillway discharge 100-160 l/h, and conductivity value is less than 50 μ S/cm;
S7, baking step: use circulating air to dry the aluminium through the process of second time hot water wash, the temperature of circulating air is 80-100 DEG C, and drying time is 600 ± 5s.
2. a kind of automobile shock part aluminium material surface treatment process as claimed in claim 1, it is characterized in that, in described defatting step, described cleaning solution comprises the component of following weight percent:
The weight percent sum of above-mentioned all components is 100%.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106345746A (en) * | 2016-09-29 | 2017-01-25 | 张家港市港威超声电子有限公司 | Energy-saving and environmentally friendly production line for automatically cleaning and drying composite copper-aluminum bars and cleaning and drying method thereof |
| CN107626669A (en) * | 2017-09-19 | 2018-01-26 | 南通市中京机械有限公司 | Surface of aluminum plate processing method |
| CN109576693A (en) * | 2018-12-05 | 2019-04-05 | 嘉兴金信铝容器有限公司 | A kind of chromaking treatment process of food-grade aluminium foil |
| CN114075672A (en) * | 2020-08-19 | 2022-02-22 | 幸立高车辆配件(常州)有限公司 | Chemical surface treatment process for improving binding force of metal surface and adhesive |
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| CN102059207A (en) * | 2010-12-31 | 2011-05-18 | 天津戴卡轮毂制造有限公司 | Aluminum alloy wheel coating process |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106345746A (en) * | 2016-09-29 | 2017-01-25 | 张家港市港威超声电子有限公司 | Energy-saving and environmentally friendly production line for automatically cleaning and drying composite copper-aluminum bars and cleaning and drying method thereof |
| CN107626669A (en) * | 2017-09-19 | 2018-01-26 | 南通市中京机械有限公司 | Surface of aluminum plate processing method |
| CN109576693A (en) * | 2018-12-05 | 2019-04-05 | 嘉兴金信铝容器有限公司 | A kind of chromaking treatment process of food-grade aluminium foil |
| CN114075672A (en) * | 2020-08-19 | 2022-02-22 | 幸立高车辆配件(常州)有限公司 | Chemical surface treatment process for improving binding force of metal surface and adhesive |
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Inventor after: Yang Lin Inventor after: Xie Min Inventor after: Li Xiaowu Inventor before: Yang Lin |
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Application publication date: 20160203 |