CN103160824B - A kind of preparation method of aluminium alloy organic amine phenol compound closure film and film forming liquid thereof - Google Patents
A kind of preparation method of aluminium alloy organic amine phenol compound closure film and film forming liquid thereof Download PDFInfo
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Abstract
The invention discloses a kind of preparation method and film forming liquid thereof of aluminium alloy organic amine phenol compound closure film, inhibiter O-Phenylene Diamine, pyrocatechol organism is added in this film forming liquid, use this confining liquid process aluminum or aluminum alloy workpiece, a kind of organic closing membrane can be formed in aluminum alloy surface.Compared with simple hot water closing membrane, adopt the present invention can improve the Corrosion Protection of aluminium alloy, the anticorrosion ability of trivalent and sexavalent chrome conversion film can be reached.
Description
Technical field
The present invention relates to aluminum alloy surface process, especially a kind of preparation method of aluminium alloy organic amine phenol compound closure film and film forming liquid thereof.
Background technology
For improving aluminium with other its metals as the Corrosion Protection of zinc, iron and steel, traditional method adopts sexavalent chrome or hot water directly to close method.But, sexavalent chrome is poisonous, in electrical equipment and electronic industry, European Union RoHS regulation (RestrictionofHazardousSubstances, " about being limited in electronic and electrical equipment the instruction using some objectionable constituent ") prohibits the use hexavalent chromium compound.In order to meet the demand of environmentally friendly technology, be developed various non-hexavalent chromium conversion film.Nearest research relates to the new conversion films such as titanium, tungsten, tin, zinc and rare-earth salts, because their Corrosion Protection and sexavalent chrome also have certain gap, therefore also fails to enter practical application; It is nontoxic that hot water directly closes method, but Corrosion Protection is poor, in practical application, particularly in rugged environment, can run into the etching problem being difficult to overcome.Organic closing membrane meets RoHS regulation, cheap, produces workable, so domestic and international many to the research of aluminium alloy anode oxide closing membrane at present., as everyone knows, ground performance is different, and treatment process is also different, and therefore the technique of aluminium alloy anode oxide closing membrane can not be directly used in the surface treatment after aluminium alloy polishing.At present about the report of aluminum alloy surface film, as the Chinese patent " normal temperature fast filming fluid for aluminium alloy surface and using method thereof " (application number 200710017506.3 applying date 2007-03-15) of Xi'an University of Architecture and Technology, and the Chinese patent that contriver is early stage " preparation method of aluminum or aluminum alloy trivalent chromium chemical conversion film " (application number 200710034656.5 applying date 2007-03-30), these are all mineral membranes, aluminium alloy organic closing membrane report is less, particularly carry out composite membrane-forming with organism amine phenol, have not been reported.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of preparation method and film forming liquid thereof of aluminium alloy organic amine phenol compound closure film, improves the Corrosion Protection of aluminum current alloy hot water closing membrane.
For solving the problems of the technologies described above the present invention by the following technical solutions: a kind of film forming liquid of aluminium alloy organic amine phenol block film, this film forming liquid contains:
O-Phenylene Diamine 0.1 ~ 20g/L
Pyrocatechol 0.1 ~ 25g/L is formulated.
The pH value of this film forming liquid is 7.0 ~ 10.0, and temperature is 85 ~ 95 DEG C.
Use the preparation method of the aluminium alloy organic amine phenol compound closure film of above-mentioned confining liquid, the method comprises the following steps:
<1> oil removing: the grease of aluminum or aluminum alloy workpiece surface is removed, and clean by washed with de-ionized water;
<2> polishing: be sulfuric acid at sulfuric acid and nitric acid proportioning by the aluminum or aluminum alloy workpiece after step <1> process: nitric acid: water=1 ~ 6: 1 ~ 6: 0.1 ~ 1, temperature is polishing 20 seconds ~ 6 minutes in the nitration mixture of 50 ~ 90 DEG C, and clean by washed with de-ionized water;
<3> closes: the aluminum or aluminum alloy workpiece after step <2> process is closed 4 ~ 15 minutes in confining liquid, and clean by washed with de-ionized water, then be drying to obtain organic amine phenol block film.
Drying temperature is 65 ~ 85 DEG C.
The present invention adds inhibiter O-Phenylene Diamine, pyrocatechol organism in lock solution, uses this confining liquid process aluminum or aluminum alloy workpiece, can form the organic closing membrane of one deck in aluminum alloy surface.Compared with closing with traditional hot water, closing membrane of the present invention is adopted to improve the Corrosion Protection of aluminium alloy, can close to the anticorrosion ability of sexavalent chrome closing membrane (inventive closure film 3.5% NaCl salt fog more than 8 days not cast alumin(i)um rust), and working concentration is low, cost is low, easy and simple to handle, be convenient to production control.In addition, the present invention does not use sexavalent chrome, and technological process and product all meet environmental requirement.
Accompanying drawing explanation
Fig. 1 is preparation method's process flow sheet of aluminium alloy organic amine phenol compound closure film of the present invention.
Embodiment
Fig. 1 shows preparation method's technical process of aluminium alloy organic amine phenol compound closure film of the present invention, wherein sets up except the step water used such as oil bath, polishing bath, closed bath and cleaning are deionized water.
Embodiment 12024 aluminium alloy is closed
A. 450L is built except oil bath: please thoroughly cleaned up by container before building bath, for new container or new production line, first clean with 10% sulphuric acid soln 50L, use washed with de-ionized water again 2 times, each water 100L, then adds the degreaser 9KGRidoline212 of Henkel, then is diluted to 450L with deionized water, PH controls, in 7 ~ 9 scopes, to stir.
B. 450L polishing bath is built: please thoroughly cleaned up by container before building bath, for new container or new production line, first with 10% sulphuric acid soln cleaning, and then clean by washed with de-ionized water.Add required deionized water 25KG, 210KG nitric acid, 210KG sulfuric acid after cleaning up, stir.Degree of intensification is to 90 DEG C again.
C. build 450L and close bath: please container is thoroughly cleaned up before building bath, for new container or new production line, first with 10% sulphuric acid soln cleaning, and then it is clean by washed with de-ionized water, add 45 grams of O-Phenylene Diamines, 11.2KG pyrocatechol, be diluted to 450L with deionized water, with 20% sodium hydroxide or 16% sulfuric acid adjust ph to 10.0, then be warming up to 95 DEG C, stir and obtain confining liquid.
D. closing membrane is prepared:
<1> oil removing: aluminum or aluminum alloy workpiece is put into basket or hangs on hanger, through removing workpiece surface grease except oil bath 8 minutes, and by washed with de-ionized water 2 minutes to totally;
<2> polishing: by the polishing 20 seconds in polishing bath of the workpiece after step <1> process, and by washed with de-ionized water 2 minutes to clean;
<3> closes: the workpiece after step <2> process is closed 15 minutes in closed bath, and by washed with de-ionized water 2 minutes to clean, drylier at 65 DEG C within 30 minutes, namely obtain closing membrane.
Embodiment 23003 aluminium alloy is closed
A. 450L is built except oil bath: please thoroughly cleaned up by container before building bath, for new container or new production line, first clean with 10% sulphuric acid soln 50L, use washed with de-ionized water again 2 times, each water 100L, then adds the degreaser 8KGRidoline212 of Henkel, then is diluted to 450L with deionized water, PH controls, in 7 ~ 9 scopes, to stir.
B. polishing bath is built: please thoroughly cleaned up by container before building bath, for new container or new production line, first with 10% sulphuric acid soln cleaning, and then clean up with water, add required deionized water 35KG, 207KG nitric acid, 208KG sulfuric acid after cleaning up, stir.Degree of intensification is to 50 DEG C again.
C. build 450L and close bath: please container is thoroughly cleaned up before building bath, for new container or new production line, first with 10% sulphuric acid soln cleaning, and then it is clean by washed with de-ionized water, add 100 grams of O-Phenylene Diamines, 10KG pyrocatechol, be diluted to 450L with deionized water, with 20% sodium hydroxide or 16% sulfuric acid adjust ph to 7.0, then be warming up to 85 DEG C, stir to obtain confining liquid.
D. closing membrane is prepared:
<1> oil removing: aluminum or aluminum alloy workpiece is put into basket or hangs on hanger, through removing workpiece surface grease except oil bath 8 minutes, and by washed with de-ionized water 2 minutes to totally;
<2> polishing: the workpiece after step <1> process is put into polishing bath polishing 6 minutes, and by washed with de-ionized water 2 minutes to clean;
<3> closes: the workpiece after step <2> process is closed 6 minutes in closed bath, and by washed with de-ionized water 2 minutes to clean, drylier at 85 DEG C within 30 minutes, namely obtain closing membrane.
Embodiment 34032 aluminium alloy is closed
A. 450L is built except oil bath: please thoroughly cleaned up by container before building bath, for new container or new production line, first clean with 10% sulphuric acid soln 50L, use washed with de-ionized water again 2 times, each water 100L, then adds the degreaser 9KGRidoline212 of Henkel, then is diluted to 450L with deionized water, PH controls, in 7 ~ 9 scopes, to stir.
B. build 450L polishing bath: please thoroughly cleaned up by container before building bath, for new container or new production line, first with 10% sulphuric acid soln cleaning, and then clean up with water.Add required deionized water 4KG, 223KG nitric acid, 223KG sulfuric acid after cleaning up, stir.Degree of intensification is to 60 DEG C again.
C. build 450L and close bath: please container is thoroughly cleaned up before building bath, for new container or new production line, first with 10% sulphuric acid soln cleaning, and then it is clean by washed with de-ionized water, add 9KG O-Phenylene Diamine, 200 grams of pyrocatechols, be diluted to 450L with deionized water, with 20% sodium hydroxide or 16% sulfuric acid adjust ph to 8.0, then be warming up to 90 DEG C, stir and obtain confining liquid.
D. closing membrane is prepared:
<1> oil removing: aluminum or aluminum alloy workpiece is put into basket or hangs on hanger, through removing workpiece surface grease except oil bath 8 minutes, and by washed with de-ionized water 2 minutes to totally;
<2> polishing: by the polishing 1 minute in polishing bath of the workpiece after step <1> process, and by washed with de-ionized water 2 minutes to clean;
<3> closes: the workpiece after step <2> process is closed 4 minutes in closed bath, and by washed with de-ionized water 2 minutes to clean, drylier at 85 DEG C within 30 minutes, namely obtain closing membrane.
Embodiment 45052 aluminium alloy is closed
A. 450L is built except oil bath: please thoroughly cleaned up by container before building bath, for new container or new production line, first clean with 10% sulphuric acid soln 50L, use washed with de-ionized water again 2 times, each water 100L, then adds the degreaser 8KGRidoline212 of Henkel, then is diluted to 450L with deionized water, PH controls, in 7 ~ 9 scopes, to stir.
B. 450L polishing bath is built: please thoroughly cleaned up by container before building bath, for new container or new production line, first with 10% sulphuric acid soln cleaning, and then clean by washed with de-ionized water.Add required deionized water 10KG, 220KG nitric acid, 220KG sulfuric acid after cleaning up, stir.Degree of intensification is to 70 DEG C again.
C. build 450L and close bath: please container is thoroughly cleaned up before building bath, for new container or new production line, first with 10% sulphuric acid soln cleaning, and then clean up with water, add 400 grams of O-Phenylene Diamines, 8KG pyrocatechol, be diluted to 450L with deionized water, with 20% sodium hydroxide or 16% sulfuric acid adjust ph to 8.0, then be warming up to 85 DEG C, stir and obtain confining liquid.
D. closing membrane is prepared:
<1> oil removing: aluminum or aluminum alloy workpiece is put into basket or hangs on hanger, through removing workpiece surface grease except oil bath 8 minutes, and by washed with de-ionized water 2 minutes to totally;
<2> polishing: by the polishing 2 minutes in polishing bath of the workpiece after step <1> process, and by washed with de-ionized water 2 minutes to clean;
<3> closes: the workpiece after step <2> process is closed 8 minutes in closed bath, and by washed with de-ionized water 2 minutes to clean, drylier at 65 DEG C within 30 minutes, namely obtain closing membrane.
Embodiment 56061 aluminium alloy is closed
A. 450L is built except oil bath: please thoroughly cleaned up by container before building bath, for new container or new production line, first clean with 10% sulphuric acid soln 50L, use washed with de-ionized water again 2 times, each water 100L, then adds the degreaser 12KGRidoline212 of Henkel, then is diluted to 500L with deionized water, PH controls, in 7 ~ 9 scopes, to stir.
B. build 450L polishing bath: please thoroughly cleaned up by container before building bath, for new container or new production line, first with 10% sulphuric acid soln cleaning, and then clean up with water.Add required deionized water 50KG, 200KG nitric acid, 200KG sulfuric acid after cleaning up, stir.Degree of intensification is to 80 DEG C again.
C. build 450L and close bath: please container is thoroughly cleaned up before building bath, for new container or new production line, first with 10% sulphuric acid soln cleaning, and then it is clean by washed with de-ionized water, add 6KG O-Phenylene Diamine, 1000 grams of pyrocatechols, be diluted to 450L with deionized water, with 20% sodium hydroxide or 16% sulfuric acid adjust ph to 9.0, then be warming up to 90 DEG C, stir and obtain confining liquid.
D. closing membrane is prepared:
<1> oil removing: aluminum or aluminum alloy workpiece is put into basket or hangs on hanger, through removing workpiece surface grease except oil bath 8 minutes, and by washed with de-ionized water 2 minutes to totally;
<2> polishing: by the polishing 4 minutes in polishing bath of the workpiece after step <1> process, and by washed with de-ionized water 2 minutes to clean;
<3> closes: the workpiece after step <2> process is closed 12 minutes in closed bath, and by washed with de-ionized water 2 minutes to clean, then drying 30 minutes and get final product at 70 DEG C.
Embodiment 66063 aluminium alloy is closed
A. 450L is built except oil bath: please thoroughly cleaned up by container before building bath, for new container or new production line, first clean with 10% sulphuric acid soln 50L, use washed with de-ionized water again 2 times, each water 100L, then adds the degreaser 10KGRidoline212 of Henkel, then is diluted to 450L with deionized water, PH controls, in 7 ~ 9 scopes, to stir.
B. build 450L polishing bath: please thoroughly cleaned up by container before building bath, for new container or new production line, first with 10% sulphuric acid soln cleaning, and then clean up with water.Add required deionized water 90KG, 180KG nitric acid, 180KG sulfuric acid after cleaning up, stir.Degree of intensification is to 90 DEG C again.
C. build 450L and close bath: please container is thoroughly cleaned up before building bath, for new container or new production line, first with 10% sulphuric acid soln cleaning, and then it is clean by washed with de-ionized water, add 2KG O-Phenylene Diamine, 2KG pyrocatechol, be diluted to 450L with deionized water, with 20% sodium hydroxide or 16% sulfuric acid adjust ph to 8.0, then be warming up to 90 DEG C, stir and obtain confining liquid.
D. closing membrane is prepared:
<1> oil removing: aluminum or aluminum alloy workpiece is put into basket or hangs on hanger, through removing workpiece surface grease except oil bath 8 minutes, and by washed with de-ionized water 2 minutes to totally;
<2> polishing: by the polishing 4 minutes in polishing bath of the workpiece after step <1> process, and by washed with de-ionized water 1 minute to clean;
<3> closes: the workpiece after step <2> process is closed 12 minutes in closed bath, and by washed with de-ionized water 2 minutes to clean, then drying 30 minutes and get final product at 80 DEG C.
Embodiment 77075 aluminium alloy is closed
A. 450L is built except oil bath: please thoroughly cleaned up by container before building bath, for new container or new production line, first clean with 10% sulphuric acid soln 50L, use washed with de-ionized water again 2 times, each water 100L, then adds the degreaser 10KGRidoline212 of Henkel, then is diluted to 450L with deionized water, PH controls, in 7 ~ 9 scopes, to stir.
B. 450L polishing bath is built: please thoroughly cleaned up by container before building bath, for new container or new production line, first with 10% sulphuric acid soln cleaning, and then clean by washed with de-ionized water.Add required deionized water 150KG, 150KG nitric acid, 150KG sulfuric acid after cleaning up, stir.Degree of intensification is to 60 DEG C again.
C. build 450L and close bath: please container is thoroughly cleaned up before building bath, for new container or new production line, first with 10% sulphuric acid soln cleaning, and then it is clean by washed with de-ionized water, add 1KG O-Phenylene Diamine, 8KG pyrocatechol, be diluted to 450L with deionized water, with 20% sodium hydroxide or 16% sulfuric acid adjust ph to 9.0, then be warming up to 90 DEG C, stir and obtain confining liquid.
D. closing membrane is prepared:
<1> oil removing: aluminum or aluminum alloy workpiece is put into basket or hangs on hanger, through removing workpiece surface grease except oil bath 8 minutes, and by washed with de-ionized water 2 minutes to totally;
<2> polishing: by the polishing 2 minutes in polishing bath of the workpiece after step <1> process, and by washed with de-ionized water 2 minutes to clean;
<3> closes: the workpiece after step <2> process is closed 10 minutes in closed bath, and by washed with de-ionized water 2 minutes to clean, then drying 30 minutes and get final product at 70 DEG C.
Embodiment 8 aluminum alloy die casting is closed
A. 300L is built except oil bath: please thoroughly cleaned up by container before building bath, for new container or new production line, first clean with 10% sulphuric acid soln 50L, use washed with de-ionized water again 2 times, each water 60L, the degreasing powder Ridoline2126KG then adding Henkel releases 300L, and redilution is to 300L, PH controls in 7 ~ 9 scopes, mixes evenly.
B. 300L polishing bath is built: please thoroughly cleaned up by container before building bath, for new container or new production line, first with 10% sulphuric acid soln cleaning, and then clean by washed with de-ionized water.Add required deionized water 2KG, 149KG nitric acid, 149KG sulfuric acid after cleaning up, stir, then degree of intensification is to 80 DEG C.
C. build 300L and close bath: please container is thoroughly cleaned up before building bath, for new container or new production line, first with 10% sulphuric acid soln cleaning, and then it is clean by washed with de-ionized water, add 2KG O-Phenylene Diamine, 5KG pyrocatechol, be diluted to 300L with deionized water, with 20% sodium hydroxide or 16% sulfuric acid adjust ph to 8.0, then be warming up to 90 DEG C, stir and obtain confining liquid.
D. closing membrane is prepared:
<1> oil removing: aluminum or aluminum alloy workpiece is put into basket or hangs on hanger, through removing workpiece surface grease except oil bath 8 minutes, and by washed with de-ionized water 2 minutes to totally;
<2> polishing: by the polishing 6 minutes in polishing bath of the workpiece after step <1> process, and by washed with de-ionized water 2 minutes to clean;
<3> closes: the workpiece after step <2> process is closed 9 minutes in closed bath, and by washed with de-ionized water 2 minutes to clean, drylier at 80 DEG C within 30 minutes, namely obtain closing membrane.
Reference examples 1 conventional aluminum alloys hot water is closed and is implemented
6063 aluminium alloy conventional hot water close
2.1) 400L is built except oil bath: please thoroughly cleaned up by container before building bath, for new container or new production line, first clean with 10% sulphuric acid soln 40L, use washed with de-ionized water again 2 times, each water 80L, then the degreasing powder Ridoline2128KG adding Henkel releases 400L, then is diluted to 400L with deionized water, and PH controls in 7 ~ 9 scopes.
2.2) 400L polishing bath is built:: please container is thoroughly cleaned up before building bath, for new container or new production line, first with 10% sulphuric acid soln cleaning, and then it is clean by washed with de-ionized water, add required deionized water 4KG, 198KG nitric acid, 198KG sulfuric acid after cleaning up, stir.Degree of intensification is to 80 DEG C again.
2.3) build 400L hot water and close bath: please container is thoroughly cleaned up before building bath, for new container or new production line, first with 10% sulphuric acid soln cleaning, and then it is clean by washed with de-ionized water, add 400L deionized water, measure its pH value, if pH value is not within the scope of 6-11.0, be then adjusted to the sulfuric acid of 20% sodium hydroxide or 16% in scope.Then be warming up to 80 degrees Celsius, stir and obtain hot water confining liquid.
2.4) after above-mentioned Job readiness is good, again workpiece is put into basket or hangs on hanger, through oil removing 6 minutes, cleaning 2 minutes, polishing 2 minutes, cleans 2 minutes, and hot water closes 15 minutes, finally clean 2 minutes, under 80 degrees Celsius, drying 30 minutes, namely obtains hot water closing membrane.
Reference examples 2 aluminum alloy trivalent chromium chromaking is implemented by patent 200710034656.5
6063 aluminum alloy trivalent chromiums are closed
2.1) 400L is built except oil bath: please thoroughly cleaned up by container before building bath, for new container or new production line, first clean with 10% sulphuric acid soln 40L, use washed with de-ionized water again 2 times, each water 80L, then the degreasing powder Ridoline2128KG adding Henkel releases 400L, then is diluted to 400L with deionized water, and PH controls in 7 ~ 9 scopes.
2.2) 400L polishing bath is built:: please container is thoroughly cleaned up before building bath, for new container or new production line, first with 10% sulphuric acid soln cleaning, and then it is clean by washed with de-ionized water, add required deionized water 4KG, 198KG nitric acid, 198KG sulfuric acid after cleaning up, stir.Degree of intensification is to 80 DEG C again.
2.3) build 400L trivalent chromium and close bath: please container is thoroughly cleaned up before building bath, for new container or new production line, first with 10% sulphuric acid soln cleaning, and then clean by washed with de-ionized water, add 15KGCr
2(SO
4)
3and phosphoric acid 6KG, with deionized water dissolving, then add deionized water to 400L, stir, measure its pH value, if pH value is not within the scope of 1.8-4.0, be then adjusted to the sulfuric acid of 20% sodium hydroxide or 16% in scope.Then be warming up to 40-50 degree Celsius, stir and obtain confining liquid.
2.4) after above-mentioned Job readiness is good, again workpiece is put into basket or hangs on hanger, through oil removing 6 minutes, cleaning 2 minutes, activate 2 minutes, clean 2 minutes, chromaking 6 minutes, finally clean 2 minutes, under 90 degrees Celsius, drying 30 minutes, namely obtains absinthe-green trivalent chromium closing membrane.
Reference examples 3 conventional aluminum alloys sexavalent chrome chromaking
6063 aluminium alloy sexavalent chromes are closed
2.1) 400L is built except oil bath: please thoroughly cleaned up by container before building bath, for new container or new production line, first clean with 10% sulphuric acid soln 40L, use washed with de-ionized water again 2 times, each water 80L, then the degreasing powder Ridoline2128KG adding Henkel releases 400L, then is diluted to 400L with deionized water, and PH controls in 7 ~ 9 scopes.
2.2) 400L polishing bath is built:: please container is thoroughly cleaned up before building bath, for new container or new production line, first with 10% sulphuric acid soln cleaning, and then it is clean by washed with de-ionized water, add required deionized water 4KG, 198KG nitric acid, 198KG sulfuric acid after cleaning up, stir.Degree of intensification is to 80 DEG C again.
2.3) build 400L sexavalent chrome and close bath: please container is thoroughly cleaned up before building bath, for new container or new production line, first with 10% sulphuric acid soln cleaning, and then clean by washed with de-ionized water, add 20KGK
2cr
2o
7and phosphoric acid 8KG, with deionized water dissolving, then add deionized water to 400L, measure its pH value, if pH value is not within the scope of 1.8-4.0, be then adjusted to the sulfuric acid of 20% sodium hydroxide or 16% in scope.Then be warming up to 50-60 degree Celsius, stir and obtain sexavalent chrome and close bath.
2.4) after above-mentioned Job readiness is good, again workpiece is put into basket or hangs on hanger, through oil removing 6 minutes, cleaning 2 minutes, activate 2 minutes, clean 2 minutes, chromaking 6 minutes, finally clean 2 minutes, under 90 degrees Celsius, drying 30 minutes, namely obtains flavous sexavalent chrome closing membrane.
Carry out quality examination to above-mentioned through embodiment 1 to 8 and reference examples 1 to 3 process gained Al alloy parts, its Corrosion Protection technical indicator result is as shown in table 1.
Table 1: Corrosion Protection technical indicator comparison sheet
Conclusion: the antiseptic property of organic amine phenol compound closure film of the present invention is considerably beyond the aluminum alloy heat water seal film of the routine in past, suitable with trivalent chromium, sexavalent chrome conversion film.
Claims (2)
1. a film forming liquid for aluminium alloy organic amine phenol compound closure film, is characterized in that this film forming liquid contains:
O-Phenylene Diamine 0.1 ~ 20g/L
Pyrocatechol 0.1 ~ 25g/L is formulated;
Film forming liquid pH value is 7.0 ~ 10.0, and closure temperature is 85 ~ 95 DEG C;
The preparation method of the aluminium alloy organic amine phenol block film of above-mentioned film forming liquid is used to comprise the following steps:
< 1 > oil removing: the grease on Al alloy parts surface is removed, and clean by washed with de-ionized water;
< 2 > polishing: be sulfuric acid at sulfuric acid and nitric acid proportioning by the Al alloy parts after step < 1 > process: nitric acid: water=1 ~ 6: 1 ~ 6: 0.1 ~ 1, temperature is polishing 20 seconds ~ 6 minutes in the nitration mixture of 50 ~ 90 DEG C, and clean by washed with de-ionized water;
< 3 > closes: the Al alloy parts after step < 2 > process is closed 4 ~ 15 minutes in film forming liquid, and clean by washed with de-ionized water, then be drying to obtain organic amine phenol compound closure film.
2. the film forming liquid of a kind of aluminium alloy organic amine phenol compound closure film according to claim 1, is characterized in that: described drying temperature is 65 ~ 85 DEG C.
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| US11891534B2 (en) | 2016-12-22 | 2024-02-06 | Henkel Ag & Co. Kgaa | Treatment of conversion-coated metal substrates with preformed reaction products of catechol compounds and functionalized co-reactant compounds |
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| EP3559312B1 (en) | 2016-12-22 | 2024-04-24 | Henkel AG & Co. KGaA | Reaction products of catechol compounds and functionalized co-reactant compounds for metal pretreatment applications |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US11891534B2 (en) | 2016-12-22 | 2024-02-06 | Henkel Ag & Co. Kgaa | Treatment of conversion-coated metal substrates with preformed reaction products of catechol compounds and functionalized co-reactant compounds |
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