CN101358341B - Environment protection type processing method of chromium-free chemistry conversion film on aluminum and aluminum alloy surface - Google Patents
Environment protection type processing method of chromium-free chemistry conversion film on aluminum and aluminum alloy surface Download PDFInfo
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- CN101358341B CN101358341B CN2008101960135A CN200810196013A CN101358341B CN 101358341 B CN101358341 B CN 101358341B CN 2008101960135 A CN2008101960135 A CN 2008101960135A CN 200810196013 A CN200810196013 A CN 200810196013A CN 101358341 B CN101358341 B CN 101358341B
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Abstract
The invention discloses a treatment method of environment protecting aluminum and aluminum alloy surface non-chromium chemical conversion film, which comprises the following steps: first, commonly used cleaning agent is used to remove oil; second, the film is washed by water to be neutral after chemical oil removal, wherein, each liter of chemical oil removal agent is mixed with 30g of sodium carbonate, 30g of trisodium carbonic acid, 4g of sodium hydroxide and 0.5ml of OP-10 emulsifier, the oil removing temperature is 65 DEG C to 75 DEG C, and the oil removing time is 10s to 20s; after chemical oil removal, the product is bleached in salpeter solution with 25 percent of volume concentration for 10s to 20s at room temperature, and then washed by water to be neutral; finally, the product is treated in non-chromium chemical conversion film solution with the volume concentration of 30ml/L to 50ml/L, the pH value is 2 to 4, the time is 30min to 10min, the temperature is 20 DEG C to 35 DEGC; after film facing, the product is washed in water of 60 DEG C to 70 DEG C to be neutral, and then dried under 70 DEG C to 90 DEG C, cooled or transferred to the painting procedure. The method meets the aluminum and aluminum alloy surface protection requirements, has low cost, stable product quality and is environment friendly.
Description
Technical field
The present invention relates to the metallochemistry passivating method, be specifically related to aluminium and Chrome-free Chemical Conversion Film on Aluminium Alloy treatment process.
Background technology
Aluminium has suitable strong electronegativity, and oxygen is had the intensive avidity, generates in atmosphere than thin oxide film, can not satisfy industrial protection needs on the one hand, influences the stable of quality product on the other hand.Chromate film is present most widely used aluminium and aluminum alloy chemically conversion film.Chromating is easy to use, and solidity to corrosion and decorate properties are good, but chromic salt toxicity height, environmental pollution is bigger, and easily carcinogenic.Coming into force of European Union (ROHS) instruction makes and uses chromating technology finally to be under an embargo in the world in metal treatment.
At present; the chromium-free deactivation technology of aluminium and aluminium alloy is mainly grasped in developed country's hand; this outlet to China's metal correlated product is very unfavorable; so non-chromium inactivating technique of research and development aluminium and aluminium alloy; it is the key research items that electroplating industry must be tackled key problems; to protection China ecotope, have remarkable economic efficiency and far-reaching social benefit.
Summary of the invention
The objective of the invention is to: a kind of aluminium and Chrome-free Chemical Conversion Film on Aluminium Alloy treatment process are provided, and solving the protection of aluminium and aluminum alloy surface needs, and cost is low, constant product quality, and environmental protection again.
Technical solution of the present invention is that this treatment process may further comprise the steps: clean-out system oil removing at first commonly used; Secondly electrochemical deoiling after washing is to neutral, and wherein every liter of electrochemical deoiling agent is made into by yellow soda ash 30g, sodium sesquicarbonate 30g, sodium hydroxide 4, OP-10 emulsifying agent 0.5ml, removes oil temperature 65-75 ℃, oil removing time 10-20 second; Room temperature bleaching 1020 seconds in volumetric concentration 25% salpeter solution behind the electrochemical deoiling then, the bleaching after washing is to neutral; Handle in the last volumetric concentration 30-50ml/L Chrome-free chemical conversion coating solution, 3-10 minute nitre acid for adjusting pH value 2-4 overlay film time, 20-35 ℃ of overlay film temperature, 60-70 ℃ of water cleans to neutral behind the overlay film, and 70-90 ℃ of oven dry cooled off or changed coating process over to; Wherein every liter of Chrome-free chemical conversion film is made into by phosphoric acid 0.5-2.00ml, titanium potassium oxalate(T.P.O.) 0.5-8.00g, fluorine zirconic acid 0.5-3.50g, Sodium Fluoride 0.5-2.50g, disodium ethylene diamine tetraacetate or citric acid 0.5-5.00g, nitric acid 0.5-3ml, peregal 0.5-4.00g; Wherein, the Chrome-free chemical conversion coating solution of volumetric concentration 30-50ml/L is formed by the dilution of Chrome-free chemistry commentaries on classics film.
The present invention has the following advantages: low processing cost, nontoxic, pollution-free, rete corrosion protection ability meets or exceeds chromic salt rete quality, and with organic coating good sticking power is arranged.
Embodiment
Below in conjunction with specific embodiment, the present invention is described in further detail.Should be understood that these embodiment just in order to demonstrate the invention, but not limit the scope of the invention by any way.
Example 1: adopt following steps overlay film aluminium alloy wheel hub: clean-out system oil removing at first commonly used; Secondly the electrochemical deoiling after washing is to neutral, and wherein every liter of electrochemical deoiling agent is made into by yellow soda ash 30g, sodium sesquicarbonate 30g, sodium hydroxide 4, OP-10 emulsifying agent 0.5ml, removes 65 ℃ of oil temperatures, 10 seconds oil removing time; Room temperature bleaching 10 seconds in volumetric concentration 25% salpeter solution behind the electrochemical deoiling then, the bleaching after washing is to neutral; Handle in the last volumetric concentration 30ml/L Chrome-free chemical conversion coating solution, 3 minutes 2 overlay film times of nitre acid for adjusting pH value, 20 ℃ of overlay film temperature, 60 ℃ of water clean to neutral behind the overlay film, and 70 ℃ of oven dry are cooled off or are changed coating process over to; Wherein every liter of Chrome-free chemical conversion film is made into by phosphoric acid 0.5ml, titanium potassium oxalate(T.P.O.) 0.5g, fluorine zirconic acid 0.5g, Sodium Fluoride 0.5g, disodium ethylene diamine tetraacetate 0.5g, nitric acid 0.5ml, peregal 0.5g; Wherein, the Chrome-free chemical conversion coating solution of volumetric concentration 30ml/L is formed by the dilution of Chrome-free chemistry commentaries on classics film.Again through application, the bonding force of film and aluminum substrate improved greatly after aluminium alloy wheel hub Chrome-free conversion film was handled, and protective capacities has improved 30%.
Example 2: adopt following steps overlay film aluminium alloy wheel hub: clean-out system oil removing at first commonly used; Secondly the electrochemical deoiling after washing is to neutral, and wherein every liter of electrochemical deoiling agent is made into by yellow soda ash 30g, sodium sesquicarbonate 30g, sodium hydroxide 4, OP-10 emulsifying agent 0.5ml, removes 70 ℃ of oil temperatures, 15 seconds oil removing time; Room temperature bleaching 15 seconds in volumetric concentration 25% salpeter solution behind the electrochemical deoiling then, the bleaching after washing is to neutral; Handle in the last volumetric concentration 40ml/L Chrome-free chemical conversion coating solution, 7 minutes 3 overlay film times of nitre acid for adjusting pH value, 28 ℃ of overlay film temperature, 65 ℃ of water clean to neutral behind the overlay film, and 80 ℃ of oven dry are cooled off or are changed coating process over to; Wherein every liter of Chrome-free chemical conversion film is made into by phosphatase 11 .20ml, titanium potassium oxalate(T.P.O.) 3.80g, fluorine zirconic acid 2.00g, Sodium Fluoride 1.50g, disodium ethylene diamine tetraacetate 2.80g, nitric acid 1.80ml, peregal 2.20g; Wherein, the Chrome-free chemical conversion coating solution of volumetric concentration 40ml/L is formed by the dilution of Chrome-free chemistry commentaries on classics film.
Example 3: adopt following steps overlay film aluminium alloy wheel hub: clean-out system oil removing at first commonly used; Secondly the electrochemical deoiling after washing is to neutral, and wherein every liter of electrochemical deoiling agent is made into by yellow soda ash 30g, sodium sesquicarbonate 30g, sodium hydroxide 4, OP-10 emulsifying agent 0.5ml, removes 75 ℃ of oil temperatures, 20 seconds oil removing time; Room temperature bleaching 20 seconds in volumetric concentration 25% salpeter solution behind the electrochemical deoiling then, the bleaching after washing is to neutral; Handle in the last volumetric concentration 50ml/L Chrome-free chemical conversion coating solution, 10 minutes 4 overlay film times of nitre acid for adjusting pH value, 35 ℃ of overlay film temperature, 70 ℃ of water clean to neutral behind the overlay film, and 90 ℃ of oven dry are cooled off or are changed coating process over to; Wherein every liter of Chrome-free chemical conversion film is made into by phosphoric acid 2.00ml, titanium potassium oxalate(T.P.O.) 8.00g, fluorine zirconic acid 3.50g, Sodium Fluoride 2.50g, disodium ethylene diamine tetraacetate 5.00g, nitric acid 3ml, peregal 4.00g; Wherein, the Chrome-free chemical conversion coating solution of volumetric concentration 50ml/L is formed by the dilution of Chrome-free chemistry commentaries on classics film.
Example 4: adopt following steps overlay film aluminium alloy wheel hub: clean-out system oil removing at first commonly used; Secondly the electrochemical deoiling after washing is to neutral, and wherein every liter of electrochemical deoiling agent is made into by yellow soda ash 30g, sodium sesquicarbonate 30g, sodium hydroxide 4, OP-10 emulsifying agent 0.5ml, removes 65 ℃ of oil temperatures, 10 seconds oil removing time; Room temperature bleaching 10 seconds in volumetric concentration 25% salpeter solution behind the electrochemical deoiling then, the bleaching after washing is to neutral; Handle in the last volumetric concentration 30ml/L Chrome-free chemical conversion coating solution, 3 minutes 2 overlay film times of nitre acid for adjusting pH value, 20 ℃ of overlay film temperature, 60 ℃ of water clean to neutral behind the overlay film, and 70 ℃ of oven dry are cooled off or are changed coating process over to; Wherein every liter of Chrome-free chemical conversion film is made into by phosphoric acid 0.5ml, titanium potassium oxalate(T.P.O.) 0.5g, fluorine zirconic acid 0.5g, Sodium Fluoride 0.5g, citric acid 0.5g, nitric acid 0.5ml, peregal 0.5g; Wherein, the Chrome-free chemical conversion coating solution of volumetric concentration 30ml/L is formed by the dilution of Chrome-free chemistry commentaries on classics film.Again through application, the bonding force of film and aluminum substrate improved greatly after aluminium alloy wheel hub Chrome-free conversion film was handled, and protective capacities has improved 30%.
Example 5: adopt following steps overlay film aluminium alloy wheel hub: clean-out system oil removing at first commonly used; Secondly the electrochemical deoiling after washing is to neutral, and wherein every liter of electrochemical deoiling agent is made into by yellow soda ash 30g, sodium sesquicarbonate 30g, sodium hydroxide 4, OP-10 emulsifying agent 0.5ml, removes 70 ℃ of oil temperatures, 15 seconds oil removing time; Room temperature bleaching 15 seconds in volumetric concentration 25% salpeter solution behind the electrochemical deoiling then, the bleaching after washing is to neutral; Handle in the last volumetric concentration 40ml/L Chrome-free chemical conversion coating solution, 7 minutes 3 overlay film times of nitre acid for adjusting pH value, 28 ℃ of overlay film temperature, 65 ℃ of water clean to neutral behind the overlay film, and 80 ℃ of oven dry are cooled off or are changed coating process over to; Wherein every liter of Chrome-free chemical conversion film is made into by phosphatase 11 .20ml, titanium potassium oxalate(T.P.O.) 3.80g, fluorine zirconic acid 2.00g, Sodium Fluoride 1.50g, citric acid 2.80g, nitric acid 1.80ml, peregal 2.20g; Wherein, the Chrome-free chemical conversion coating solution of volumetric concentration 40ml/L is formed by the dilution of Chrome-free chemistry commentaries on classics film.
Example 6: adopt following steps overlay film aluminium alloy wheel hub: clean-out system oil removing at first commonly used; Secondly the electrochemical deoiling after washing is to neutral, and wherein every liter of electrochemical deoiling agent is made into by yellow soda ash 30g, sodium sesquicarbonate 30g, sodium hydroxide 4, OP-10 emulsifying agent 0.5ml, removes 75 ℃ of oil temperatures, 20 seconds oil removing time; Room temperature bleaching 20 seconds in volumetric concentration 25% salpeter solution behind the electrochemical deoiling then, the bleaching after washing is to neutral; Handle in the last volumetric concentration 50ml/L Chrome-free chemical conversion coating solution, 10 minutes 4 overlay film times of nitre acid for adjusting pH value, 35 ℃ of overlay film temperature, 70 ℃ of water clean to neutral behind the overlay film, and 90 ℃ of oven dry are cooled off or are changed coating process over to; Wherein every liter of Chrome-free chemical conversion film is made into by phosphoric acid 2.00ml, titanium potassium oxalate(T.P.O.) 8.00g, fluorine zirconic acid 3.50g, Sodium Fluoride 2.50g, citric acid 5.00g, nitric acid 3ml, peregal 4.00g; Wherein, the Chrome-free chemical conversion coating solution of volumetric concentration 50ml/L is formed by the dilution of Chrome-free chemistry commentaries on classics film.
Claims (1)
1. aluminium and Chrome-free Chemical Conversion Film on Aluminium Alloy treatment process is characterized in that this treatment process may further comprise the steps: clean-out system oil removing at first commonly used; Secondly electrochemical deoiling after washing is to neutral, and wherein every liter of electrochemical deoiling agent is made into by yellow soda ash 30g, sodium sesquicarbonate 30g, sodium hydroxide 4, OP-10 emulsifying agent 0.5ml, removes oil temperature 65-75 ℃, oil removing time 10-20 second; Then behind the electrochemical deoiling in volumetric concentration 25% salpeter solution room temperature bleaching 10-20 second, the bleaching after washing is to neutral; Handle in the last volumetric concentration 30-50ml/L Chrome-free chemical conversion coating solution, 3-10 minute nitre acid for adjusting pH value 2-4 overlay film time, 20-35 ℃ of overlay film temperature, 60-70 ℃ of water cleans to neutral behind the overlay film, and 70-90 ℃ of oven dry cooled off or changed coating process over to; Wherein every liter of Chrome-free chemical conversion film is made into by phosphoric acid 0.5-2.00ml, titanium potassium oxalate(T.P.O.) 0.5-8.00g, fluorine zirconic acid 0.5-3.50g, Sodium Fluoride 0.5-2.50g, disodium ethylene diamine tetraacetate or citric acid 0.5-5.00g, nitric acid 0.5-3ml, peregal 0.5-4.00g; Wherein, the Chrome-free chemical conversion coating solution of volumetric concentration 30-50ml/L is formed by the dilution of Chrome-free chemistry commentaries on classics film.
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| CN101985750A (en) * | 2010-11-11 | 2011-03-16 | 华南理工大学 | Treating fluid for preparing zirconium-containing coloring passive film on surface of aluminum alloy and treating method thereof |
| CN102242358B (en) * | 2011-07-15 | 2013-02-13 | 华南理工大学 | Treatment solution and treatment method for preparing golden cryolite conversion film on surface of aluminum alloy |
| 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 |
| CN102433559B (en) * | 2011-10-24 | 2013-09-04 | 宁波科苑鑫泰表面处理新技术有限公司 | Rare earth cerium-containing metal treatment fluid and production method thereof |
| CN102433560A (en) * | 2011-10-24 | 2012-05-02 | 宁波科苑鑫泰表面处理新技术有限公司 | Rare earth lanthanum-containing metal treatment fluid and production method thereof |
| CN105603407A (en) * | 2016-03-08 | 2016-05-25 | 湖南金裕环保科技有限公司 | Functional protective film |
| CN105734598B (en) * | 2016-03-29 | 2018-11-27 | 浙江道明光电科技有限公司 | The environment protection chemical surface treatment method of aluminium foil in lithium battery flexible packaging aluminum plastic film |
| CN106521472A (en) * | 2016-12-09 | 2017-03-22 | 江美丽 | Aluminium alloy passivating reagent and passivating process |
| CN106868484A (en) * | 2017-01-20 | 2017-06-20 | 深圳市天合兴五金塑胶有限公司 | High heat conduction aluminum alloy material surface processing method |
| CN110936113A (en) * | 2019-12-19 | 2020-03-31 | 秦皇岛戴卡兴龙轮毂有限公司 | Manufacturing method of long-life forged aluminum alloy wheel |
| CN111041390A (en) * | 2019-12-27 | 2020-04-21 | 宁波吉胜铸业有限公司 | Automobile-used aluminium casting pump body |
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Owner name: JSZHY PLATING CO., LTD. Free format text: FORMER OWNER: HONGZE COUNTY YUNFEI ELECTROPLATING FACTORY Effective date: 20121025 |
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Effective date of registration: 20121025 Address after: 223100 Huaian City, Jiangsu Province town of Hongze County Zhu Huashan Road East Patentee after: Jiangsu Zengqiuyun Surface Treatment Co., Ltd. Address before: 223100 Huaian City, Jiangsu Province town of Hongze County Zhu Huashan Road No. 1 Patentee before: Hongze County Yunfei Electroplating Factory |