CN103834939A - Aluminum alloy surface passivation liquid and processing method thereof - Google Patents
Aluminum alloy surface passivation liquid and processing method thereof Download PDFInfo
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- CN103834939A CN103834939A CN201210492364.7A CN201210492364A CN103834939A CN 103834939 A CN103834939 A CN 103834939A CN 201210492364 A CN201210492364 A CN 201210492364A CN 103834939 A CN103834939 A CN 103834939A
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Abstract
The invention relates to an aluminum alloy surface passivation liquid and a processing method thereof. The aluminum alloy surface passivation liquid comprises the following components: 0.1-10.0g/L potassium fluosilicate, 0.1-5.0g/L sodium fluoride, 0.1-5.0g/L potassium fluozirconate, 0.1-10.0g/L nitric acid and 0.1-10.0g/L phytic acid. The processing method comprises the step of contacting an aluminum alloy with the passivation liquid, wherein the passivation liquid is the aluminum alloy surface passivation liquid. Compared with the prior art, the passivation liquid has the advantages that the passivation liquid does not contact heavy metal ions especially chromium ions, the burden of the wastewater treatment is alleviated, the harms to the environment and the human health are reduced, the passivation treatment time is short, and the heating is omitted in a passivation process; the processing method is simple in step, and an obtained aluminum alloy product is strong in corrosion resistance.
Description
[technical field]
The present invention relates to a kind of aluminum alloy surface treatment solution and treatment process thereof, be specifically related to a kind of aluminum alloy surface passivating solution and treatment process thereof.
[background technology]
Aluminium alloy is used widely in the industry such as automobile, motorcycle, aircraft and boats and ships.But, the resistance to corrosion of aluminium a little less than, it is essential technique that anti-corrosive treatment is carried out in its surface.And passivation be use the most extensively, one of the most effective anti-corrosive treatment method.
Traditional sexavalent chrome passivation technology, from the viewpoint of technology maturity and cost-saving etc., has mostly been selected by the most of enterprise of Present Domestic.Although sexavalent chrome passive film anti-corrosion performance is good and outward appearance is beautiful, sexavalent chrome is the extremely strong material of a kind of toxicity, is acknowledged as carcinogenic substance and dangerous air pollutant.Sexavalent chrome can not be degraded at occurring in nature, and it,, in biological and human body inner accumulated, can cause the harm of chronicity.
The enterprise of domestic product exported product must stop using sexavalent chrome passivation technology after August 13 in 2004.Therefore, the application of sexavalent chrome passivating solution has been subject to serious restriction, and each state has not all forwarded developing focus to or not even do not contained on the environment-friendly type passivation liquid of chromium element containing sexavalent chrome.
In view of this, be necessary to provide a kind for the treatment of solution and treatment process thereof in fact, make alloy product after treatment there is erosion resistance, can not produce environment and the harmful pollutent of human body simultaneously.
[summary of the invention]
Therefore, the invention provides a kind of aluminum alloy surface passivating solution and treatment process thereof, the method alloy product after treatment can keep surperficial erosion resistance, can not produce again environment and the harmful pollutent of human body.
In order to achieve the above object, the invention provides a kind of aluminum alloy surface passivating solution, described aluminium alloy passivating solution is for containing potassium silicofluoride, Sodium Fluoride, potassium fluozirconate, nitric acid and planting aqueous acid.
Preferably, in described passivating solution, the concentration of potassium silicofluoride is 0.1～10.0g/L; The concentration of Sodium Fluoride is 0.1～5.0g/L; The concentration of potassium fluozirconate is 0.1～5.0g/L; Nitric acid 0.1～10.0g/L; Phytic acid concentration is 0.1～10.0g/L.
The present invention also provides a kind of aluminum alloy surface passivating solution treatment process, and this treatment process comprises aluminium alloy is contacted with passivating solution, and described passivating solution is above-mentioned aluminum alloy surface passivating solution.
Preferably, described treatment process also comprises carries out pre-treatment to aluminium alloy, and described pre-treatment comprises the following steps:
(1) in grease-removing agent, alloy product is carried out to degreasing;
(2) alloy product after degreasing is carried out to alkali and sting processing;
(3) alkali is stung to alloy product after treatment and carried out neutralizing treatment.
Preferably, the grease-removing agent in described step (1) comprises that concentration is the OP-10 that the sodium phosphate of 20g/L, water glass that concentration is 10g/L and concentration are 1g/L; The temperature of grease-removing agent is 55 DEG C; Degreasing time is 3min.
Preferably, the alkali in described step (2) is stung liquid and is comprised that mass percent is 2～10% NaOH; The temperature that alkali is stung liquid is 55 DEG C; The time that alkali is stung is 5～60s.
Preferably, the neutralizing treatment liquid in described step (3) comprises that mass percent is 10～30% nitric acid; The temperature of neutralizing treatment liquid is room temperature; The time of neutralizing treatment is 1～5min.
Preferably, afterwards, step (2) has been carried out 2 washings to alloy product to described step (1) before.
Preferably, afterwards, step (3) has been carried out 2 washings to alloy product to described step (2) before.
Preferably, described step (3) has been carried out 2 washings to alloy product afterwards.
Compared to prior art, aluminum alloy surface passivating solution of the present invention and treatment process thereof, wherein this passivating solution has the following advantages: especially do not contain chromium ion containing heavy metal ion, alleviate the burden of wastewater treatment, reduced the harm to environment and human health, the Passivation Treatment time is short, and passivating process is without heating, the step of this treatment process is simple, and the alloy product erosion resistance obtaining is strong.
[embodiment]
For object of the present invention, method steps and function are had to further understanding, and be described in detail as follows:
Embodiment 1:
Aluminum alloy surface passivating solution provided by the invention, described aluminium alloy passivating solution is for containing potassium silicofluoride, Sodium Fluoride, potassium fluozirconate, nitric acid and planting aqueous acid.
In the present embodiment, the concentration of the potassium silicofluoride in described passivating solution is 8.0g/L; The concentration of Sodium Fluoride is 2.0g/L; The concentration of potassium fluozirconate is 3.0g/L; Nitric acid 5.0g/L; Phytic acid concentration is 1.0g/L.
In addition, the present invention also provides a kind of aluminum alloy surface passivating solution treatment process, and this treatment process comprises aluminium alloy is contacted with passivating solution, and described passivating solution is above-mentioned aluminum alloy surface passivating solution.
Wherein, described treatment process also comprises carries out pre-treatment to aluminium alloy, and described pre-treatment comprises the following steps:
Step 101: in grease-removing agent, alloy product is carried out to degreasing;
Step 102: the alloy product after degreasing is carried out to alkali and sting processing;
Step 103: alkali is stung to alloy product after treatment and carry out neutralizing treatment.
Wherein, the grease-removing agent in described step 101 comprises that concentration is the OP-10 that the sodium phosphate of 20g/L, water glass that concentration is 10g/L and concentration are 1g/L; The temperature of grease-removing agent is 55 DEG C; Degreasing time is 3min.
Wherein, the alkali in described step 102 is stung liquid and is comprised that mass percent is 2～10% NaOH; The temperature that alkali is stung liquid is 55 DEG C; The time that alkali is stung is 30s.
Wherein, the neutralizing treatment liquid in described step 103 comprises that mass percent is 10～30% nitric acid; The temperature of neutralizing treatment liquid is room temperature; The time of neutralizing treatment is 1min.
Wherein, after described step 101, before step 102, alloy product has been carried out to 2 washings.
Wherein, after described step 102, before step 103, alloy product has been carried out to 2 washings.
Wherein, after described step 103, alloy product has been carried out to 2 washings.
Embodiment 2:
Aluminum alloy surface passivating solution provided by the invention, described aluminium alloy passivating solution is for containing potassium silicofluoride, Sodium Fluoride, potassium fluozirconate, nitric acid and planting aqueous acid.
In the present embodiment, the concentration of the potassium silicofluoride in described passivating solution is 9.0g/L; The concentration of Sodium Fluoride is 3.0g/L; The concentration of potassium fluozirconate is 2.0g/L; Nitric acid 4.0g/L; Phytic acid concentration is 3.0g/L.
In addition, the present invention also provides a kind of aluminum alloy surface passivating solution treatment process, and this treatment process comprises aluminium alloy is contacted with passivating solution, and described passivating solution is above-mentioned aluminum alloy surface passivating solution.
Wherein, described treatment process also comprises carries out pre-treatment to aluminium alloy, and described pre-treatment comprises the following steps:
Step 201: in grease-removing agent, alloy product is carried out to degreasing;
Step 202: the alloy product after degreasing is carried out to alkali and sting processing;
Step 203: alkali is stung to alloy product after treatment and carry out neutralizing treatment.
Wherein, the grease-removing agent in described step 201 comprises that concentration is the OP-10 that the sodium phosphate of 20g/L, water glass that concentration is 10g/L and concentration are 1g/L; The temperature of grease-removing agent is 55 DEG C; Degreasing time is 3min.
Wherein, the alkali in described step 202 is stung liquid and is comprised that mass percent is 2～10% NaOH; The temperature that alkali is stung liquid is 55 DEG C; The time that alkali is stung is 30s.
Wherein, the neutralizing treatment liquid in described step 203 comprises that mass percent is 10～30% nitric acid; The temperature of neutralizing treatment liquid is room temperature; The time of neutralizing treatment is 1min.
Wherein, after described step 201, before step 202, alloy product has been carried out to 2 washings.
Wherein, after described step 202, before step 203, alloy product has been carried out to 2 washings.
Wherein, after described step 203, alloy product has been carried out to 2 washings.
Embodiment 3:
Aluminum alloy surface passivating solution provided by the invention, described aluminium alloy passivating solution is for containing potassium silicofluoride, Sodium Fluoride, potassium fluozirconate, nitric acid and planting aqueous acid.
In the present embodiment, the concentration of the potassium silicofluoride in described passivating solution is 5.0g/L; The concentration of Sodium Fluoride is 2.0g/L; The concentration of potassium fluozirconate is 1.0g/L; Nitric acid 3.0g/L; Phytic acid concentration is 5.0g/L.
In addition, the present invention also provides a kind of aluminum alloy surface passivating solution treatment process, and this treatment process comprises aluminium alloy is contacted with passivating solution, and described passivating solution is above-mentioned aluminum alloy surface passivating solution.
Wherein, described treatment process also comprises carries out pre-treatment to aluminium alloy, and described pre-treatment comprises the following steps:
Step 301: in grease-removing agent, alloy product is carried out to degreasing;
Step 302: the alloy product after degreasing is carried out to alkali and sting processing;
Step 303: alkali is stung to alloy product after treatment and carry out neutralizing treatment.
Wherein, the grease-removing agent in described step 301 comprises that concentration is the OP-10 that the sodium phosphate of 20g/L, water glass that concentration is 10g/L and concentration are 1g/L; The temperature of grease-removing agent is 55 DEG C; Degreasing time is 3min.
Wherein, the alkali in described step 302 is stung liquid and is comprised that mass percent is 2～10% NaOH; The temperature that alkali is stung liquid is 55 DEG C; The time that alkali is stung is 30s.
Wherein, the neutralizing treatment liquid in described step 303 comprises that mass percent is 10～30% nitric acid; The temperature of neutralizing treatment liquid is room temperature; The time of neutralizing treatment is 1min.
Wherein, after described step 301, before step 302, alloy product has been carried out to 2 washings.
Wherein, after described step 302, before step 303, alloy product has been carried out to 2 washings.
Wherein, after described step 303, alloy product has been carried out to 2 washings.
By in above-described embodiment, aluminum alloy sample after aluminum alloy surface passivating solution and disposal methods in embodiment, be placed on respectively under neutral salt spray and test (testing standard ASTM B117-2011) after 96h, corresponding aluminum alloy sample surface is all without obvious corrosion phenomenon.Aluminum alloy sample in above-described embodiment is sprayed respectively to one deck epoxy resin-based paint, and this aluminum alloy sample after spraying paint first carries out environmental testing, by the testing standard of ASTM D3359, the sample after test is carried out to the test of sticking power, and test result is as following table:
Aluminum alloy sample test result after upper table sprays paint is all without the phenomenon of bubbling.
Compared to prior art, aluminum alloy surface passivating solution of the present invention, treatment process and products thereof, wherein this passivating solution has the following advantages: especially do not contain chromium ion containing heavy metal ion, alleviate the burden of wastewater treatment, reduced the harm to environment and human health, the Passivation Treatment time is short, and passivating process is without heating, the step of this treatment process is simple, and the alloy product erosion resistance obtaining is strong.
Be pointed out that, the invention is not restricted to above-mentioned embodiment, any simple modification, equivalent variations and modification that any those skilled in the art do above-described embodiment based on technical solution of the present invention, all fall within the scope of protection of the present invention.
Claims (10)
1. an aluminum alloy surface passivating solution, is characterized in that, described aluminium alloy passivating solution is for containing potassium silicofluoride, Sodium Fluoride, potassium fluozirconate, nitric acid and planting aqueous acid.
2. aluminum alloy surface passivating solution according to claim 1, is characterized in that, in described passivating solution, the concentration of potassium silicofluoride is 0.1～10.0g/L; The concentration of Sodium Fluoride is 0.1～5.0g/L; The concentration of potassium fluozirconate is 0.1～5.0g/L; Nitric acid 0.1～10.0g/L; Phytic acid concentration is 0.1～10.0g/L.
3. an aluminum alloy surface passivating solution treatment process, this treatment process comprises aluminium alloy is contacted with passivating solution, it is characterized in that, described passivating solution is the aluminum alloy surface passivating solution described in any one in claim 1 to 2.
4. aluminum alloy surface passivating solution treatment process according to claim 3, is characterized in that, described treatment process also comprises carries out pre-treatment to aluminium alloy, and described pre-treatment comprises the following steps:
(1) in grease-removing agent, alloy product is carried out to degreasing;
(2) alloy product after degreasing is carried out to alkali and sting processing;
(3) alkali is stung to alloy product after treatment and carried out neutralizing treatment.
5. aluminum alloy surface passivating solution treatment process according to claim 4, is characterized in that, the grease-removing agent in described step (1) comprises that concentration is the OP-10 that the sodium phosphate of 20g/L, water glass that concentration is 10g/L and concentration are 1g/L; The temperature of grease-removing agent is 55 DEG C; Degreasing time is 3min.
6. aluminum alloy surface passivating solution treatment process according to claim 4, is characterized in that, the alkali in described step (2) is stung liquid and comprised that mass percent is 2～10% NaOH; The temperature that alkali is stung liquid is 55 DEG C; The time that alkali is stung is 5～60s.
7. aluminum alloy surface passivating solution treatment process according to claim 4, is characterized in that, the neutralizing treatment liquid in described step (3) comprises that mass percent is 10～30% nitric acid; The temperature of neutralizing treatment liquid is room temperature; The time of neutralizing treatment is 1～5min.
8. aluminum alloy surface passivating solution treatment process according to claim 4, is characterized in that, afterwards, step (2) has been carried out 2 washings to alloy product to described step (1) before.
9. aluminum alloy surface passivating solution treatment process according to claim 4, is characterized in that, afterwards, step (3) has been carried out 2 washings to alloy product to described step (2) before.
10. aluminum alloy surface passivating solution treatment process according to claim 4, is characterized in that, described step (3) has been carried out 2 washings to alloy product afterwards.
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Cited By (5)
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| CN104152884A (en) * | 2014-06-11 | 2014-11-19 | 张家港沙龙精密管业有限公司 | Passivation formula for surface passivation of aluminum alloy product |
| CN104451632A (en) * | 2014-11-14 | 2015-03-25 | 无锡伊佩克科技有限公司 | Low-temperature passivating agent for galvanized steel sheet and preparation method of low-temperature passivating agent |
| CN105039949A (en) * | 2015-07-21 | 2015-11-11 | 安徽江威精密制造有限公司 | Aluminum piece passivator and preparation method thereof |
| CN107034471A (en) * | 2017-06-16 | 2017-08-11 | 哈尔滨哈船新材料科技有限公司 | A kind of aluminum or aluminum alloy surface preparation photochemical treatment fluid and the method for Chemical cleaning |
| CN107829081A (en) * | 2017-11-07 | 2018-03-23 | 北京安邦之星科技有限公司 | A kind of special passivation film agent of aluminum products and preparation method thereof |
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| CN107034471A (en) * | 2017-06-16 | 2017-08-11 | 哈尔滨哈船新材料科技有限公司 | A kind of aluminum or aluminum alloy surface preparation photochemical treatment fluid and the method for Chemical cleaning |
| CN107829081A (en) * | 2017-11-07 | 2018-03-23 | 北京安邦之星科技有限公司 | A kind of special passivation film agent of aluminum products and preparation method thereof |
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