CN103590043B - The pretreated method of aluminum alloy surface - Google Patents
The pretreated method of aluminum alloy surface Download PDFInfo
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Abstract
The present invention relates to a kind of low pollution, low water consumption, the pretreated methods of alkaline etching oil removing integration aluminum alloy surface.It the described method comprises the following steps: 1) aluminium alloy being put into progress alkaline etching oil removal treatment in alkaline etching agent solution；2) it washes；3) it is put into neutralizer and is neutralized；4) it washes；5) it dries up.The present invention is compared with traditional acid etching process, and without fluorine and ammonia and nitrogen pollution, aluminium consumption is close, considerably reduces water consume.With traditional alkaline etching technics comparing, aluminium consumption is low, and water consume is low, and process flow is short, high-efficient.The invention not only eliminates fluorine and ammonia and nitrogen pollution from technique source, also there is aluminium to consume the advantage that low, water consume is low, process is short, high-efficient, has both environmental-friendly, resource-effective feature.
Description
Technical field
The present invention relates to aluminum alloy surface process fields, locate in advance more particularly to a kind of low pollution low water consumption aluminum alloy surface
The method of reason.
Background technique
Aluminium alloy is using aluminium as the alloy general name of base, and main alloy element has copper, silicon, magnesium, zinc, manganese, and secondary alloying element has
Nickel, iron, titanium, chromium, lithium etc..Aluminium alloy is the current maximum of yield in the world, most widely used non-ferrous metal.Because of its excellent physics
Chemical property is widely applied in fields such as building, communications and transportation, machine-building, electronics, packaging material, electric power, daily necessities.I
State is alloy product manufacture and consumption big country, and China's aluminium yield increases by 15.87% on a year-on-year basis up to 3037.3 ten thousand tons within 2012.So
And aluminium alloy it is moist, containing easily corroding when being used in the environment such as industrial gasses, fuel gas, salinity and dust atmosphere
It destroys, shortens its service life.To improve aluminum alloy surface corrosion resisting property, improve that its is decorative and functional, aluminium alloy is going out
It must be surface-treated before factory.Aluminum alloy surface pretreatment is the critical process of its surface treatment, it directly determines aluminium profiles
The quality on material surface.
The processing technique of aluminium and its alloy surface usually has: the technologies such as anodic oxidation, chemical oxidation, phosphorating treatment.Wherein
Anodizing technology is aluminium and its pretreated major technique of alloy surface.And the surface in anode oxidation process and processing are to sun
The effect of pole oxidation plays a crucial role.In anode oxidation process, pre-processes the technique generallyd use and be divided into acid etching
Technique and alkaline etching technique, the main distinction are the differences of medicament bulk composition.
It if CN 101215694A discloses a kind of high pure aluminum alloy chemical nickel-plating activating solution, takes water as a solvent, every liter should
Contain in solution: phosphatase 11 0-40G, boric acid 2-10G, acetic acid 5-30G, thiocarbamide 2-6G, ammonium sulfate 10-25G, tertiary sodium phosphate 10-
30G, ammonium acid fluoride 15-40G；The technique side for carrying out aluminum alloy surface processing using the high pure aluminum alloy chemical nickel-plating activating solution
Method.CN 101619448A discloses a kind of preprocessing solution for electroless nickel-phosphorus alloy plating layer on surface of aluminum alloy, forms and contains
Amount are as follows: sodium molybdate 5-40G/L；Sodium hydroxide 5-30G/L or ammonium hydroxide 10-40ML/L；Deionized water is surplus.
Acid etching process using ammonium acid fluoride as pre-treatment medicaments main component, generated in production process a large amount of Waste Hydrogen Fluoride Gas,
Fluorine-containing and high ammonia-nitrogen wastewater and waste residue seriously pollute environment, damage enterprise employee health.Alkaline etching technique Chinese medicine bulk composition is hydrogen-oxygen
Change sodium, technique aluminium consumption is high, and production efficiency is low.And no matter acid etching process (see figure 1) or alkaline etching technique (see figure 2), all deposit
In multistep water-washing step.Wherein acid etching process needs 8 rinsing bowls, 6 rinsing bowls of alkaline etching process requirement.Therefore water consume is high, and
And these the fluorine-containing overwhelming majority of industrial wastewater containing ammonium direct emissions in technique production, cause serious environmental pollution.
Summary of the invention
Serious, the defect of high water consume for pollutant emission in existing aluminum alloy surface pretreating process, the present invention provide
A kind of pretreated method of low pollution low water consumption aluminum alloy surface is reduced dirty with reaching under the premise of guaranteeing that aluminium consumption is not increased
Object discharge is contaminated, the purpose of the consumption of water is reduced.
In order to achieve the above object, the present invention adopts the following technical scheme:
A kind of pretreated method of aluminum alloy surface, comprising the following steps: 1) by aluminium alloy be put into alkaline etching agent solution into
Row alkaline etching oil removing integrated treatment, this operates the effect that can reach oil removing while alkaline etching, i.e., described alkaline etching oil removing one
Change processing；2) it washes；3) it is put into neutralizer and is neutralized；4) it washes；5) it dries up.
Preferably, aluminium alloy is put into alkaline etching agent solution and washes with water before progress alkaline etching oil removing integrated treatment.
Preferably, the aluminium alloy is architectural aluminum section, the aluminium of preferably 1050,1100,3003,5005,5052 or 6063
Alloy.
For the present invention, it is preferable that step 1) the alkaline etching agent contains NaCO3、NaOH、Na3PO4And Na2SO4, preferred alkali
Lose agent in every kind of ingredient concentration be 5g/L~60g/L, for example, 8g/L, 12g/L, 15g/L, 20g/L, 23g/L, 29g/L,
35g/L, 42g/L, 48g/L, 55g/L, 59g/L etc., preferably 10g/L~50g/L.
Preferably, the alkaline etching agent also contains nitrite, sodium metasilicate, dodecyl sodium sulfate, gum arabic, paste
One kind or two or more mixture in essence, glycerol, sorbitol, sodium citrate or urea, the additions of these additives can be with
So that alkaline etching agent reaches better using effect, the concentration of preferably every kind ingredient is 0.5g/L~20g/L, for example, 0.8g/L,
1.2g/L, 2.5g/L, 5g/L, 8g/L, 11g/L, 15g/L, 18g/L, 19.5g/L etc., preferably 1g/L~10g/L.
Preferably, the temperature of step 1) the alkaline etching oil removing integrated treatment is 30 DEG C~60 DEG C, for example, 33 DEG C, 36
DEG C, 41 DEG C, 48 DEG C, 55 DEG C, 59 DEG C etc., preferably 40 DEG C~55 DEG C；The time of the alkaline etching oil removing integrated treatment is 5min
~20min, for example, 7min, 12min, 16min, 18min etc., preferably 10min~15min.
For the present invention, it is preferable that the step 2) washing is at 1 time or more, and preferably 2 times；
Preferably, the time of the washing is 1min~5min every time, for example, 1min5s, 1min45s, 2min,
2.5min, 3.1min, 4min4.5min etc., preferably 1min~3min.
For the present invention, it is preferable that the temperature of the step 3) neutralisation treatment is 15 DEG C~40 DEG C, for example, 18 DEG C, 22
DEG C, 26 DEG C, 30 DEG C, 34 DEG C, 38 DEG C etc., preferably 20 DEG C~35 DEG C；The time of the neutralisation treatment is 1min~10min, example
For example 3min, 4min, 6min, 8min, 9min etc., preferably 1min~5min.
Preferably, the step 3) neutralizer contains sulfuric acid, nitric acid and iron chloride；
Preferably, the concentration of the sulfuric acid be 50g/L~200g/L, for example, 70g/L, 90g/L, 110g/L, 150g/L,
180g/L, 195g/L etc., preferably 100g/L~120g/L；The concentration of the nitric acid is 50g/L~200g/L, for example, 70g/
L, 90g/L, 110g/L, 150g/L, 180g/L, 195g/L etc., preferably 50g/L~100g/L；The concentration of the iron chloride is
2g/L~10g/L, for example, 3g/L, 4.5g/L, 6g/L, 7.5g/L, 9g/L etc..
For the present invention, it is preferable that the number of the step 4) washing is at 1 time or more, and preferably 2 times；
Preferably, the time of the washing is 1min~5min every time, for example, 1min5s, 1min45s, 2min,
2.5min, 3.1min, 4min4.5min etc..
For the present invention, it is preferable that drying described in step 5) is dried up using cold wind.
As optimal technical scheme, method of the present invention includes the following steps:
1) aluminum alloy surface is washed with water；
2) aluminium alloy cleaned is put into the alkaline etching agent solution of 5g/L~60g/L, carries out alkaline etching at 30 DEG C~60 DEG C
Oil removing integrated treatment 5min~20min；
3) after alkaline etching oil removing integrated treatment, deionized water washes aluminium alloy twice；
4) aluminium alloy after washing is put into neutralizer, is neutralized 1min~10min at 15 DEG C~40 DEG C；
5) after neutralisation treatment, deionized water washes aluminium alloy twice；
6) cold wind dries up the remaining moisture of aluminum alloy surface.
The present invention is compared with traditional acid etching process, and without fluorine and ammonia and nitrogen pollution, aluminium consumption is close, considerably reduces water consume.
Compared with traditional alkaline etching technique, aluminium consumption is low, and water consume is low, and process flow is short, high-efficient.The invention is not only eliminated from technique source
Fluorine and ammonia and nitrogen pollution also there is aluminium to consume the advantage that low, water consume is low, process is short, high-efficient, have both environmental-friendly, resource-effective
Feature.
Detailed description of the invention
Fig. 1 is sour etching technique；
Fig. 2 is caustic corrosion technique；
Fig. 3 is process flow chart of the invention.
Specific embodiment
Of the invention for ease of understanding, it is as follows that the present invention enumerates embodiment.Those skilled in the art are it will be clearly understood that the implementation
Example is only to aid in the understanding present invention, should not be regarded as a specific limitation of the invention.
Fig. 1 is process flow chart of the invention.
Embodiment 1
1) 6063 aluminium alloy of specification is taken, clear water rinses；
2) it is put into progress alkaline etching oil removing integrated treatment in alkaline etching agent solution, alkaline etching agent ingredient is Na2CO3, NaOH,
Na3PO4, Na2SO4, dodecyl sodium sulfate, glycerol and sodium citrate, the concentration of every kind of ingredient are 10g/L, alkaline etching agent solution temperature
Degree is 40 DEG C, alkaline etching oil removing integrated treatment time 10min；
3) after alkaline etching oil removing integrated treatment, deionized water is washed twice, and each time is 1min；
4) aluminum profile after washing is neutralized, and the main component and concentration of neutralizer are respectively as follows: sulfuric acid
100g/L, nitric acid 100g/L, neutralization temperature are 25 DEG C, and the neutralization time is 2min；
5) after neutralisation treatment, deionized water washes aluminium alloy twice, and each washing time is respectively 1min；
6) the remaining moisture of last cold wind drying aluminum alloy surface.
Aluminum alloy surface that treated in embodiment leveling effect is obvious, and dusting effect is general, and dust situation improves bright
It is aobvious.
Embodiment 2
1) 6063 aluminium alloy of specification is taken, clear water rinses；
2) it is put into progress alkaline etching oil removing integrated treatment in alkaline etching agent solution, alkaline etching agent main component is Na2CO3, NaOH,
Na3PO4, Na2SO4, dodecyl sodium sulfate, glycerol and sodium citrate, the concentration of every kind of ingredient are 15g/L, alkaline etching agent solution temperature
Degree is 55 DEG C, alkaline etching oil removing integrated treatment time 8min；
3) after alkaline etching oil removing integrated treatment, deionized water is washed twice, and each time is 2min；
4) aluminum profile after washing is neutralized, and the main component and concentration of neutralizer are respectively as follows: sulfuric acid
120g/L, nitric acid 120g/L, neutralization temperature are 25 DEG C, and the neutralization time is 1min；
5) after neutralisation treatment, deionized water washes aluminium alloy twice, and the time is respectively 2min twice；
6) the remaining moisture of last cold wind drying aluminum alloy surface.
The aluminum alloy surface leveling obtained in the embodiment works well, and dusting effect is moderate, and dust situation makes moderate progress.
Embodiment 3
1) 3003 aluminium alloy of specification is taken, clear water rinses；
2) it is put into progress alkaline etching oil removing integrated treatment in alkaline etching agent solution, alkaline etching agent main component is Na2CO3, NaOH,
Na3PO4, Na2SO4, the concentration of every kind of ingredient is 20g/L, and alkaline etching agent solution temperature is 50 DEG C, when alkaline etching oil removing integrated treatment
Between 15min；
3) after alkaline etching oil removing integrated treatment, deionized water is washed twice, and each time is 2min；
4) aluminum profile after washing is neutralized, and the main component and concentration of neutralizer are respectively as follows: sulfuric acid
100g/L, nitric acid 100g/L, neutralization temperature are 25 DEG C, and the neutralization time is 1min；
5) after neutralisation treatment, deionized water washes aluminium alloy twice, and the time is respectively 2min twice；
6) the remaining moisture of last cold wind drying aluminum alloy surface.
The aluminum alloy surface leveling effect obtained in the embodiment is general, and dusting effect is preferable, and dust situation improves obvious.
Embodiment 4
1) 6063 aluminium alloy of specification is taken, clear water rinses；
2) being put into progress alkaline etching oil removing integrated treatment, alkaline etching agent main component agent concentration in alkaline etching agent solution is respectively
Na2CO3, NaOH, Na3PO4, Na2SO4, dodecyl sodium sulfate, glycerol, sodium citrate, the concentration of every kind of ingredient is 30g/L, alkali
Losing agent solution temperature is 60 DEG C, alkaline etching oil removing integrated treatment time 10min；
3) after alkaline etching oil removing integrated treatment, deionized water is washed twice, and each time is 2min；
4) aluminum profile after washing is neutralized, and the main component and concentration of neutralizer are respectively as follows: sulfuric acid
100g/L, nitric acid 100g/L, FeCl36g/L, neutralization temperature are 25 DEG C, and the neutralization time is 2min；
5) after neutralisation treatment, deionized water washes aluminium alloy twice, and the time is respectively 2min twice；
6) the remaining moisture of last cold wind drying aluminum alloy surface.
The aluminum alloy surface leveling effect obtained in the embodiment is preferable, and dusting effect is moderate, and dust situation improves less
Obviously.
Table 1 is that above-mentioned 4 embodiments carry out pretreated measurement result to aluminium shape surface.
Table 1
The Applicant declares that the present invention is explained by the above embodiments detailed process equipment and process flow of the invention,
But the present invention is not limited to the above detailed process equipment and process flow, that is, it is above-mentioned detailed not mean that the present invention must rely on
Process equipment and process flow could be implemented.It should be clear to those skilled in the art, any improvement in the present invention,
Addition, selection of concrete mode of equivalence replacement and auxiliary element to each raw material of product of the present invention etc., all fall within of the invention
Within protection scope and the open scope.
Claims (18)
1. a kind of pretreated method of aluminum alloy surface, comprising the following steps: 1) aluminium alloy is put into alkaline etching agent solution and is carried out
Alkaline etching oil removing integrated treatment；2) it washes；3) it is put into neutralizer and is neutralized；4) it washes；5) it dries up；
Step 1) the alkaline etching agent contains NaCO3、NaOH、Na3PO4And Na2SO4；The concentration of every kind of ingredient is 5g/L in alkaline etching agent
~35g/L；
Step 3) the neutralizer contains sulfuric acid, nitric acid and iron chloride；The concentration of the sulfuric acid is 50g/L~200g/L；It is described
The concentration of nitric acid is 50g/L~200g/L；The concentration of the iron chloride is 2g/L~10g/L.
2. the method according to claim 1, wherein aluminium alloy is put into progress alkaline etching oil removing one in alkaline etching agent solution
It is washed with water before bodyization processing.
3. the method according to claim 1, wherein the aluminium alloy is architectural aluminum section.
4. the method according to claim 1, wherein the aluminium alloy is 1050,1100,3003,5005,5052
Or 6063 aluminium alloy.
5. the method according to claim 1, wherein the alkaline etching agent also contains nitrite, sodium metasilicate, ten
It is one kind or two or more mixed in dialkyl sulfonates, gum arabic, dextrin, glycerol, sorbitol, sodium citrate or urea
Close object.
6. the method according to claim 1, wherein the temperature of step 1) the alkaline etching oil removing integrated treatment is
30 DEG C~60 DEG C；The time of the alkaline etching oil removing integrated treatment is 5min~20min.
7. the method according to claim 1, wherein the temperature of step 1) the alkaline etching oil removing integrated treatment is
40 DEG C~55 DEG C；The time of the alkaline etching oil removing integrated treatment is 10min~15min.
8. the method according to claim 1, wherein the step 2) washing is at 1 time or more.
9. the method according to claim 1, wherein the step 2) washing is 2 times.
10. the method according to claim 1, wherein the time of the step 2) washing be every time 1min~
5min。
11. the method according to claim 1, wherein the time of the step 2) washing be every time 1min~
3min。
12. the method according to claim 1, wherein the temperature of the step 3) neutralisation treatment is 15 DEG C~40
℃；The time of the neutralisation treatment is 1min~10min.
13. the method according to claim 1, wherein the temperature of the step 3) neutralisation treatment is 20 DEG C~35
℃；The time of the neutralisation treatment is 1min~5min.
14. the method according to claim 1, wherein the concentration of the sulfuric acid is 100g/L~120g/L；It is described
The concentration of nitric acid is 50g/L~100g/L；The concentration of the iron chloride is 2g/L~10g/L.
15. the method according to claim 1, wherein the number of the step 4) washing is at 1 time or more.
16. the method according to claim 1, wherein the number of the step 4) washing is 2 times.
17. the method according to claim 1, wherein the time of the step 4) washing be every time 1min~
5min。
18. the method according to claim 1, wherein drying described in step 5) is dried up using cold wind.
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Families Citing this family (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104313582A (en) * | 2014-10-31 | 2015-01-28 | 湖州织里天荣铝材添加剂厂 | Novel aluminum alloy alkaline etching additive and preparation method thereof |
| CN104878390A (en) * | 2015-05-28 | 2015-09-02 | 湖州巨力铝型材有限公司 | Rapid and efficient sanding process for aluminium profile |
| CN105803506B (en) * | 2016-03-28 | 2018-10-02 | 佛山市三水雄鹰铝表面技术创新中心有限公司 | Aluminium alloy free-floride is without treatment agent recovery system in face of ammonium four-in-one sand |
| CN105821463B (en) * | 2016-03-28 | 2018-10-02 | 佛山市三水雄鹰铝表面技术创新中心有限公司 | Free-floride is without treatment agent and its use in face of ammonium four-in-one sand |
| CN107510915B (en) * | 2016-06-16 | 2020-10-16 | 中石化石油工程技术服务有限公司 | Oil-based drilling cutting destabilizing agent and preparation method thereof |
| CN110079848B (en) * | 2019-04-28 | 2021-02-23 | 安徽华淮新材料有限公司 | Aluminum alloy chemical coarse sand surface treatment method |
| CN110387546A (en) * | 2019-07-12 | 2019-10-29 | 国家电网有限公司 | A kind of cleaning method of aluminum hardware |
| CN110629226A (en) * | 2019-09-17 | 2019-12-31 | 佛山市海化表面处理科技有限公司 | Alkaline bright sand surface agent and preparation method thereof |
| CN111157313A (en) * | 2020-01-09 | 2020-05-15 | 广东凤铝铝业有限公司 | Process liquid tank for online detection of aluminum material head and online detection method thereof |
| CN112760647A (en) * | 2020-12-04 | 2021-05-07 | 马鞍山市华冶铝业有限责任公司 | Scale-inhibiting brightening aluminum alloy alkaline etching solution and preparation method thereof |
| CN112941526A (en) * | 2021-01-20 | 2021-06-11 | 浙江乔老爷铝业有限公司 | Aluminum profile surface treatment process with low aluminum consumption |
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