CN101736336A - Aluminum non-chromium surface treatment technology - Google Patents
Aluminum non-chromium surface treatment technology Download PDFInfo
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- CN101736336A CN101736336A CN200910255834A CN200910255834A CN101736336A CN 101736336 A CN101736336 A CN 101736336A CN 200910255834 A CN200910255834 A CN 200910255834A CN 200910255834 A CN200910255834 A CN 200910255834A CN 101736336 A CN101736336 A CN 101736336A
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Abstract
The invention relates to an aluminum non-chromium surface treatment technology which is particularly suitable for a product packing industry, belonging to the technical field of surface treatment technology. The aluminum non-chromium surface treatment technology comprises the following technical process: 1. alkaline washing; 2. water scrubbing; 3. film forming; 4. water scrubbing; and 5. supplementary film forming. The aluminum non-chromium surface treatment technology is low in cost and simple in operation, and adopts non-chromium treated bath solution so as to lead a treating film generated on the surface of aluminum not to contain heavy metal chromium, thus being suitable for packaging material for food and being good for environmental protection and human health.
Description
Technical field
The present invention relates to a kind of aluminum non-chromium surface treatment technology, be specially adapted to the production of the aluminium pop can cover aluminium of packing of product industry, belong to the process of surface treatment technical field.
Background technology
At present, what domestic known cover aluminium material surface adopted is the process of surface treatment that chromaking is arranged, and chromium passivating technology has surface adhesion force and the corrosion resistance that satisfies the metal coated requirement, but sexavalent chrome is a carcinogens, and there are very big hazardness in environment and HUMAN HEALTH.
Summary of the invention
The objective of the invention is to solve the weak point that above-mentioned prior art exists, providing a kind of does not have harm, does not contain heavy metal chromium in the processing film that aluminium material surface is generated environment and HUMAN HEALTH, make the rete and the aluminium sticking power and strong of Chrome-free with coating adhesion, and it is corrosion-resistant, easy handling, technical process is simple and direct, the aluminum non-chromium surface treatment technology that Stability of Bath Solution is high.
The present invention is achieved through the following technical solutions:
A kind of aluminum non-chromium surface treatment technology, its special character is to comprise following technical process:
1, alkali cleaning
The detergent solution that adds concentration and be 2%-4% in stainless steel tank is as tank liquor, effective cleaning composition of clean-out system by the defoamer of the tensio-active agent that accounts for potassium hydroxide that the detergent solution mass percent is 10%-30%, 5%-15%, 0.5%-1.5%, all the other form for deionized water, aluminium is carried out alkali cleaning by this tank liquor continuously, reaction times is controlled at 3-5 second, and controlling tank liquor concentration by acid base titration simultaneously is 2%-4%;
2, washing
Aluminium after alkali cleaning finishes by with the stainless steel tank of pure water as tank liquor, sprays washing continuously, and the reaction times is controlled at 1-3 second, washes 2 times, and the specific conductivity that makes 2 washing bath tank liquors is less than 100 μ s, and the aluminium material surface oil removal rate reaches more than 95% simultaneously;
3, film forming
The chemical agent that adds concentration and be 2%-4% in another stainless steel tank is as tank liquor, this chemical agent is mainly by accounting for the hydrofluoric acid that the chemical agent mass percent is 1%-5%, the fluorine carbonic acid of 0.1%-0.8%, the fluorine zirconic acid of 0.1%-0.8%, the organic-molybdenum salt of 0.8%-1.5%, organic zirconates of 0.1%-0.8%, the organic titanium salt of 0.1%-0.8%, all the other are formed for deionized water, aluminium after washing finished is continuously by this tank liquor, spray reaction, reaction times is controlled at 3-5 second, aluminium material surface is formed contain titanium simultaneously, molybdenum, the organic film of three kinds of elements of zirconium, this organic membrane is the individual layer reaction film, this rete and aluminium have surface adhesion force and the erosion resistance that satisfies the metal coated requirement, titanium wherein, molybdenum, zirconium exists with organic form, in the production process, tank liquor was carried out an acid base titration to be detected every 2 hours, too high if count, need add water, continue to replenish tank liquor if spend low the needs, the free acid of tank liquor is controlled in the 1.5-3.5ml scope;
4, washing
Aluminium after pickling finished is by with the stainless steel tank of pure water as tank liquor, carry out washed reaction, the reaction times is controlled at 1-3 second, washes 2 times, the specific conductivity that makes 2 washing bath tank liquors is less than 100 μ s, and makes the aluminium material surface after the washing not contain acidic component substantially;
5, replenish film forming
For the position that does not form complete film in the film forming groove is replenished film forming, aluminium after the washing is in the stainless steel tank of chemical agent as tank liquor of 0.1%-0.2% by concentration, the main component of this chemical agent is phosphoric acid and organism, wherein phosphoric acid accounts for the 1%-5% of chemical agent mass percent, organism accounts for 0.5-1.5%, and all the other are deionized water; The turbidity of tank liquor is controlled to be 0.1%-0.4%;
Described organism is an organic-molybdenum salt;
The use temperature of tank liquor described in the technical process 1-5 is controlled at 50-60 degree centigrade.
A kind of aluminum non-chromium surface treatment technology of the present invention, the technology cost is low, effective, can remove the greasy dirt and the natural oxide film of aluminium material surface by alkali cleaning and washing process, film-forming process makes aluminium material surface formation contain titanium, molybdenum, the organic film of zirconium, this rete and aluminium have surface adhesion force and the erosion resistance that satisfies the metal coated requirement, this technology easy handling, flow process is simple and direct, the Stability of Bath Solution height, whole process flow is to carry out in the processing tank liquor of no chromaking, do not contain heavy metal chromium in the processing film that aluminium material surface is generated, thereby be suitable for packaging material for food, be of value to environmental protection and HUMAN HEALTH.
Embodiment
Below for the embodiment of a kind of aluminum non-chromium surface treatment technology of the present invention.
Embodiment 1
A kind of aluminum non-chromium surface treatment technology of present embodiment comprises following technical process:
1, alkali cleaning
The detergent solution that adds concentration and be 2%-4% in stainless steel tank is as tank liquor, effective cleaning composition of clean-out system by the defoamer of the tensio-active agent that accounts for potassium hydroxide that the detergent solution mass percent is 10%-30%, 5%-15%, 0.5%-1.5%, all the other form for deionized water, aluminium is carried out alkali cleaning by this tank liquor continuously, reaction times is controlled at 3-5 second, and controlling tank liquor concentration by acid base titration simultaneously is 2%-4%;
Tensio-active agent adopts sodium lauryl sulphate, and defoamer adopts soap salt defoamer;
2, washing
Aluminium after alkali cleaning finishes by with the stainless steel tank of pure water as tank liquor, sprays washing continuously, and the reaction times is controlled at 1-3 second, washes 2 times, and the specific conductivity that makes 2 washing bath tank liquors is less than 100 μ s, and the aluminium material surface oil removal rate reaches more than 95% simultaneously;
3, film forming
The chemical agent that adds concentration and be 2%-4% in another stainless steel tank is as tank liquor, this chemical agent is mainly by accounting for the hydrofluoric acid that the chemical agent mass percent is 1%-5%, the fluorine carbonic acid of 0.1%-0.8%, the fluorine zirconic acid of 0.1%-0.8%, the organic-molybdenum salt of 0.8%-1.5%, organic zirconates of 0.1%-0.8%, the organic titanium salt of 0.1%-0.8%, all the other are formed for deionized water, aluminium after washing finished is continuously by this tank liquor, spray reaction, reaction times is controlled at 3-5 second, aluminium material surface is formed contain titanium simultaneously, molybdenum, the organic film of three kinds of elements of zirconium, this organic membrane is the individual layer reaction film, this rete and aluminium have surface adhesion force and the erosion resistance that satisfies the metal coated requirement, titanium wherein, molybdenum, zirconium exists with organic form, in the production process, tank liquor was carried out an acid base titration to be detected every 2 hours, too high if count, need add water, continue to replenish tank liquor if spend low the needs, the free acid of tank liquor is controlled in the 1.5-3.5ml scope;
4, washing
Aluminium after pickling finished is by with the stainless steel tank of pure water as tank liquor, carry out washed reaction, the reaction times is controlled at 1-3 second, washes 2 times, the specific conductivity that makes 2 washing bath tank liquors is less than 100 μ s, and makes the aluminium material surface after the washing not contain acidic component substantially;
5, replenish film forming
For the position that does not form complete film in the film forming groove is replenished film forming, aluminium after the washing is in the stainless steel tank of chemical solution as tank liquor of 0.1%-0.2% by concentration, the main component of this chemical agent is phosphoric acid and organism, wherein phosphoric acid accounts for the 1%-5% of chemical agent mass percent, organism accounts for 0.5-1.5%, and all the other are deionized water; The turbidity of tank liquor is controlled to be 0.1%-0.4%;
Described organism is an organic-molybdenum salt;
The use temperature of tank liquor described in the technical process 1-5 is controlled at 50-60 degree centigrade.
The detection method of aluminium rete was as follows after film-forming process was finished:
Prepare the metal sheet of 2 two sides treated 4 " * 6 ".Sample must not have fingerprint, surface no-pollution thing, and not japanning.When the sensitization pallet that uses 5 " * 7 " immerses, first block of plate is placed in the sensitization pallet, the acid stripping solution of 60-65 milliliter is poured on the metal sheet, shake pallet gently, so acid stripping solution embathes the metallic surface, after 30 seconds kinds, with carefully overturn metal testing plate and repeat to shake gently the sensitization pallet of plastic clamp, with clamp testing plate is lifted from acid stripping solution, use deionized water the acid stripping solution of remnants to be cleaned in 100 milliliters the volumetric flask.Second block of plate repeats these steps, and it is immersed in the sensitization pallet that first block of plate use in the same acid stripping solution, acidic stripping liquid transferred to from the sensitization pallet in 100 milliliters the plastics volumetric flask.Putting a plastic funnel on volumetric flask helps all sour stripping solutions are poured in the volumetric flask, with deionized water residual acid stripping solution is washed in the volumetric flask, at last, with deionized water the acid stripping solution in the volumetric flask is modulated to 100 milliliters and covers volumetric flask and mixing.Carry out the spectrophotometer flow process afterwards, unit type is DR2010.
The spectrophotometer flow process:
1, presses: 0ENTER.Display screen will show fast: Zero Sample
2, rotation wavelength scale card shows up to small display: 465nm.Press: ENTER
3, measuring 20 milliliters peels off test solution and pours in the clean cuvette.Put into spectrophotometer, eclipser on the closure.
4, press ZERO, indicating meter will show Zeroing ... then show: 0.000Absorbance
5, use 10 milliliters of syringes to add 6 milliliters of HCl (50%) solution in same cuvette.Rock and make it mixed.
6, the standard iron that adds 5 1000ppm is in same cuvette, and mixes.
7, use a plastics dipper to add one spoonful of ammonium thiocyanate in same cuvette, with it mixing.
8, add one spoonful of inferior tin reagent in cuvette with another dipper.
9, opened timing register immediately 3 minutes, in 2 minutes of beginning, rock with solubilising reagent energetically.Afterwards, rapping all bubbles that stick on the cuvette wall to remove on the experiment table.To see that the black that generates in the 7th step has disappeared, a kind of yellowish-orange compound has produced simultaneously.
10, when the timing register buzzing (after 3 minutes) put into cell rack and closed eclipser with cuvette.
11, pressing the READ indicating meter will show: READING ... light absorption ratio reading (ABS) will show like this.Absorbancy should be between 0.12 and 1.10.If be lower than this lower limit, abandon this sour stripping solution and restart, use the bigger metal testing plate of a slice (for example, use the plate of four 4 " * 6 ", rather than two).If be higher than this upper limit, can dilute this acidic stripping liquid 50% and replication.
12, molybdenum rete weight can use following formula to calculate: Mo mg ft2 0 69 ABS-0.02 processing parameter explanations
| Operation | The tank liquor composition | Configuration concentration % | Reaction times s | Controlling valu |
| Alkali cleaning | ??4086A | ??3％ | ??4 | ??2％-4％ |
| Alkali cleaning | ??4086A | ??2％ | ??4 | ??2％-3％ |
| Washing | Pure water | ??- | ??2 | Specific conductivity＜300 |
| Washing | Pure water | ??- | ??2 | Specific conductivity＜100 |
| Film forming | ??1903 | ??3％ | ??3.5-4.5 | Free acid 2-2.5 |
| Washing | Pure water | ??- | ??2 | Specific conductivity＜300 |
| Washing | Pure water | ??- | ??2 | Specific conductivity＜100 |
| Sealing | ??SG7602 | ??0.15％ | ??2 | Turbidity 0.1%-0.3% |
A kind of aluminum non-chromium surface treatment technology of present embodiment, with low cost, simple to operation, adopt the processing tank liquor of no chromaking, do not contain heavy metal chromium in the processing film that aluminium material surface is generated, thereby be suitable for packaging material for food, be of value to environmental protection and HUMAN HEALTH.
Claims (3)
1. aluminum non-chromium surface treatment technology comprises following technical process:
1), alkali cleaning
The detergent solution that adds concentration and be 2%-4% in stainless steel tank is as tank liquor, effective cleaning composition of clean-out system by the defoamer of the tensio-active agent that accounts for potassium hydroxide that the detergent solution mass percent is 10%-30%, 5%-15%, 0.5%-1.5%, all the other form for deionized water, aluminium is carried out alkali cleaning by this tank liquor continuously, reaction times is controlled at 3-5 second, and controlling tank liquor concentration by acid base titration simultaneously is 2%-4%;
2), washing
Aluminium after alkali cleaning finishes by with the stainless steel tank of pure water as tank liquor, sprays washing continuously, and the reaction times is controlled at 1-3 second, washes 2 times, and the specific conductivity that makes 2 washing bath tank liquors is less than 100 μ s, and the aluminium material surface oil removal rate reaches more than 95% simultaneously;
3), film forming
The chemical agent that adds concentration and be 2%-4% in another stainless steel tank is as tank liquor, this chemical agent is mainly by accounting for the hydrofluoric acid that the chemical agent mass percent is 1%-5%, the fluorine carbonic acid of 0.1%-0.8%, the fluorine zirconic acid of 0.1%-0.8%, the organic-molybdenum salt of 0.8%-1.5%, organic zirconates of 0.1%-0.8%, the organic titanium salt of 0.1%-0.8%, all the other are formed for deionized water, aluminium after washing finished is continuously by this tank liquor, spray reaction, reaction times is controlled at 3-5 second, aluminium material surface is formed contain titanium simultaneously, molybdenum, the organic film of three kinds of elements of zirconium, this organic membrane is the individual layer reaction film, this rete and aluminium have surface adhesion force and the erosion resistance that satisfies the metal coated requirement, titanium wherein, molybdenum, zirconium exists with organic form, in the production process, tank liquor was carried out an acid base titration to be detected every 2 hours, too high if count, need add water, continue to replenish tank liquor if spend low the needs, the free acid of tank liquor is controlled in the 1.5-3.5ml scope;
4), washing
Aluminium after pickling finished is by with the stainless steel tank of pure water as tank liquor, carry out washed reaction, the reaction times is controlled at 1-3 second, washes 2 times, the specific conductivity that makes 2 washing bath tank liquors is less than 100 μ s, and makes the aluminium material surface after the washing not contain acidic component substantially;
5), replenish film forming
For the position that does not form complete film in the film forming groove is replenished film forming, aluminium after the washing is in the stainless steel tank of chemical agent as tank liquor of 0.1%-0.2% by concentration, the main component of this chemical agent is phosphoric acid and organism, wherein phosphoric acid accounts for the 1%-5% of chemical agent mass percent, organism accounts for 0.5-1.5%, and all the other are deionized water; The turbidity of tank liquor is controlled to be 0.1%-0.4%.
2. according to the described a kind of aluminum non-chromium surface treatment technology of claim 1, it is characterized in that the organism in the described step 5 is an organic-molybdenum salt.
3. according to the described a kind of aluminum non-chromium surface treatment technology of claim 1, it is characterized in that the use temperature of tank liquor among the described step 1-5 is controlled at 50-60 degree centigrade.
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| CN200910255834A CN101736336A (en) | 2009-12-31 | 2009-12-31 | Aluminum non-chromium surface treatment technology |
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| CN200910255834A CN101736336A (en) | 2009-12-31 | 2009-12-31 | Aluminum non-chromium surface treatment technology |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102321881A (en) * | 2011-10-17 | 2012-01-18 | 湖南创高铝业集团有限公司 | Chromium-free passivation surface treatment process of aluminium material |
| CN102330128A (en) * | 2011-07-25 | 2012-01-25 | 太仓市金鹿电镀有限公司 | Plated workpiece surface pretreatment method |
| CN107138362A (en) * | 2017-05-18 | 2017-09-08 | 佛山宝润金属制品有限公司 | A kind of application process of easy open cover |
| CN108723235A (en) * | 2018-04-29 | 2018-11-02 | 温州博德科技有限公司 | The idiosome moulding process of aluminum bottle |
| US10125424B2 (en) | 2012-08-29 | 2018-11-13 | Ppg Industries Ohio, Inc. | Zirconium pretreatment compositions containing molybdenum, associated methods for treating metal substrates, and related coated metal substrates |
| CN108866526A (en) * | 2018-08-06 | 2018-11-23 | 广州和力表面处理技术有限公司 | A kind of cover packaging material pre-treatment chromium-free environment-friendly passivator and preparation method thereof |
| CN108941109A (en) * | 2018-07-03 | 2018-12-07 | 佛山市瑞丰恒业机械有限公司 | Pop can tank washing equipment |
| 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 |
| US10400337B2 (en) | 2012-08-29 | 2019-09-03 | Ppg Industries Ohio, Inc. | Zirconium pretreatment compositions containing lithium, associated methods for treating metal substrates, and related coated metal substrates |
| US11518960B2 (en) | 2016-08-24 | 2022-12-06 | Ppg Industries Ohio, Inc. | Alkaline molybdenum cation and phosphonate-containing cleaning composition |
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2009
- 2009-12-31 CN CN200910255834A patent/CN101736336A/en active Pending
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102330128A (en) * | 2011-07-25 | 2012-01-25 | 太仓市金鹿电镀有限公司 | Plated workpiece surface pretreatment method |
| CN102321881A (en) * | 2011-10-17 | 2012-01-18 | 湖南创高铝业集团有限公司 | Chromium-free passivation surface treatment process of aluminium material |
| US10125424B2 (en) | 2012-08-29 | 2018-11-13 | Ppg Industries Ohio, Inc. | Zirconium pretreatment compositions containing molybdenum, associated methods for treating metal substrates, and related coated metal substrates |
| US10400337B2 (en) | 2012-08-29 | 2019-09-03 | Ppg Industries Ohio, Inc. | Zirconium pretreatment compositions containing lithium, associated methods for treating metal substrates, and related coated metal substrates |
| US10920324B2 (en) | 2012-08-29 | 2021-02-16 | Ppg Industries Ohio, Inc. | Zirconium pretreatment compositions containing molybdenum, associated methods for treating metal substrates, and related coated metal substrates |
| US11518960B2 (en) | 2016-08-24 | 2022-12-06 | Ppg Industries Ohio, Inc. | Alkaline molybdenum cation and phosphonate-containing cleaning composition |
| CN107138362A (en) * | 2017-05-18 | 2017-09-08 | 佛山宝润金属制品有限公司 | A kind of application process of easy open cover |
| CN108723235A (en) * | 2018-04-29 | 2018-11-02 | 温州博德科技有限公司 | The idiosome moulding process of aluminum bottle |
| CN108941109A (en) * | 2018-07-03 | 2018-12-07 | 佛山市瑞丰恒业机械有限公司 | Pop can tank washing equipment |
| CN108866526A (en) * | 2018-08-06 | 2018-11-23 | 广州和力表面处理技术有限公司 | A kind of cover packaging material pre-treatment chromium-free environment-friendly passivator and preparation method thereof |
| 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 |
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Open date: 20100616 |