US3920488A - Process for coloring aluminum black - Google Patents
Process for coloring aluminum black Download PDFInfo
- Publication number
- US3920488A US3920488A US464328A US46432874A US3920488A US 3920488 A US3920488 A US 3920488A US 464328 A US464328 A US 464328A US 46432874 A US46432874 A US 46432874A US 3920488 A US3920488 A US 3920488A
- Authority
- US
- United States
- Prior art keywords
- per liter
- grams per
- coloring
- temperature
- bath
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 238000000034 method Methods 0.000 title claims abstract description 44
- 229910052782 aluminium Inorganic materials 0.000 title claims abstract description 21
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 title claims abstract description 21
- 238000004040 coloring Methods 0.000 title claims description 21
- 230000007797 corrosion Effects 0.000 claims abstract description 14
- 238000005260 corrosion Methods 0.000 claims abstract description 14
- 229910045601 alloy Inorganic materials 0.000 claims abstract description 13
- 239000000956 alloy Substances 0.000 claims abstract description 13
- VSCWAEJMTAWNJL-UHFFFAOYSA-K aluminium trichloride Chemical compound Cl[Al](Cl)Cl VSCWAEJMTAWNJL-UHFFFAOYSA-K 0.000 claims abstract description 13
- FBAFATDZDUQKNH-UHFFFAOYSA-M iron chloride Chemical compound [Cl-].[Fe] FBAFATDZDUQKNH-UHFFFAOYSA-M 0.000 claims abstract description 12
- 239000007864 aqueous solution Substances 0.000 claims abstract description 11
- 238000007739 conversion coating Methods 0.000 claims abstract description 11
- 239000000243 solution Substances 0.000 claims abstract description 11
- 239000012670 alkaline solution Substances 0.000 claims abstract description 6
- 229910052751 metal Inorganic materials 0.000 claims abstract description 6
- 239000002184 metal Substances 0.000 claims abstract description 6
- 238000000576 coating method Methods 0.000 claims description 16
- 239000011248 coating agent Substances 0.000 claims description 13
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 claims description 10
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 claims description 8
- 238000005530 etching Methods 0.000 claims description 8
- QGAVSDVURUSLQK-UHFFFAOYSA-N ammonium heptamolybdate Chemical compound N.N.N.N.N.N.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.[Mo].[Mo].[Mo].[Mo].[Mo].[Mo].[Mo] QGAVSDVURUSLQK-UHFFFAOYSA-N 0.000 claims description 7
- OAKJQQAXSVQMHS-UHFFFAOYSA-N hydrazine group Chemical group NN OAKJQQAXSVQMHS-UHFFFAOYSA-N 0.000 claims description 6
- 229910000029 sodium carbonate Inorganic materials 0.000 claims description 5
- PXLIDIMHPNPGMH-UHFFFAOYSA-N sodium chromate Chemical compound [Na+].[Na+].[O-][Cr]([O-])(=O)=O PXLIDIMHPNPGMH-UHFFFAOYSA-N 0.000 claims description 5
- AVXURJPOCDRRFD-UHFFFAOYSA-N Hydroxylamine Chemical compound ON AVXURJPOCDRRFD-UHFFFAOYSA-N 0.000 claims description 2
- 229910021529 ammonia Inorganic materials 0.000 claims description 2
- 239000004411 aluminium Substances 0.000 abstract description 11
- 230000002378 acidificating effect Effects 0.000 abstract description 3
- 235000018660 ammonium molybdate Nutrition 0.000 abstract description 3
- APUPEJJSWDHEBO-UHFFFAOYSA-P ammonium molybdate Chemical compound [NH4+].[NH4+].[O-][Mo]([O-])(=O)=O APUPEJJSWDHEBO-UHFFFAOYSA-P 0.000 abstract description 2
- 239000011609 ammonium molybdate Substances 0.000 abstract description 2
- 229940010552 ammonium molybdate Drugs 0.000 abstract description 2
- 235000019646 color tone Nutrition 0.000 description 12
- 239000004922 lacquer Substances 0.000 description 6
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- 229910000838 Al alloy Inorganic materials 0.000 description 3
- 229910052742 iron Inorganic materials 0.000 description 3
- NLXLAEXVIDQMFP-UHFFFAOYSA-N Ammonia chloride Chemical compound [NH4+].[Cl-] NLXLAEXVIDQMFP-UHFFFAOYSA-N 0.000 description 2
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 2
- 241000519995 Stachys sylvatica Species 0.000 description 2
- 230000006378 damage Effects 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- MEFBJEMVZONFCJ-UHFFFAOYSA-N molybdate Chemical compound [O-][Mo]([O-])(=O)=O MEFBJEMVZONFCJ-UHFFFAOYSA-N 0.000 description 2
- 150000003839 salts Chemical class 0.000 description 2
- 239000007921 spray Substances 0.000 description 2
- 239000008399 tap water Substances 0.000 description 2
- 235000020679 tap water Nutrition 0.000 description 2
- 241000237519 Bivalvia Species 0.000 description 1
- 241000255969 Pieris brassicae Species 0.000 description 1
- 102220491117 Putative postmeiotic segregation increased 2-like protein 1_C23F_mutation Human genes 0.000 description 1
- 241000872198 Serjania polyphylla Species 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 235000019270 ammonium chloride Nutrition 0.000 description 1
- 239000002585 base Substances 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 235000020639 clam Nutrition 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 238000005238 degreasing Methods 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000002203 pretreatment Methods 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 239000011780 sodium chloride Substances 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 230000004580 weight loss Effects 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C22/00—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
- C23C22/05—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions
- C23C22/06—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions using aqueous acidic solutions with pH less than 6
- C23C22/40—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions using aqueous acidic solutions with pH less than 6 containing molybdates, tungstates or vanadates
Definitions
- the object of the invention presented here is to produce in a simple way on aluminium and its alloys, black conversion coatings which bond well to the substrate,
- the object is fulfilled in terms of the invention in that the metal surface is etched in an iron chloride solution, then coloring in an acidic, aqueous solution of ammonium molybdate and aluminum chloride and finally is
- the subject of the invention is a processfor coloring 5 centrationof l 20 g/l.
- EXAMPLE 1 Sheets of aluminium alloy'containing 4.3 Cu, 1 l Mg, 0.6% Mn, 0.4% Fe and 0.3% Si, and 100 X 70 x 1 mm in dimension, are after degreasing, suspended in a 5% iron chloride solution at 91c for 3 minutes. After given an after-treatment with an alkaline aqueous solution.
- v I v Black conversion coatings produced .in accordance with this process are especially suitable for graphical reproduction processes:
- An aluminium sheet which bears a conversion coating or an A1 0 coating after any desired process is covered with a photo lacquer.
- Those places, which'should later be colored black, are covered with a negative.
- the lacquer can be removed easily fromthese places, whilst the otherplaceswhich are covered with the polymerised lacquer after develop! ment and the oxide underneath are prevented from being colored black in the process.
- Tlhusthe black areas in contrast to thosenot attacked in'the process, can be sharply delineated from areas-which are white or which have another color. This is for example desireable with lettering, scanning or line-structured pictures.
- the degreased articles which are made of aluminium or an aluminium alloy are first of all etched f6? '1 4 minutes in a :2 '15 aqueous iron chloride solution which is at a temperature of 70F 95C.
- the articles are then si'uspended for05 10 min in ajcolouri ng-bathat at)" 9 '2 ?c, containing 25 70 g/l, preferably '40 60 g/l ammonium-hepta-molybdate ((NH M6 O .4- H 0) and 10 100 g/l, preferably 4 80 g/l aluminium trichloride.
- a bath temperature of 90C the treatment time in the molybdate solution lies preferably between rinsing with cold tapwater the sheets are treated for 3 min in a solution of 5% ammonium hepta molybdate 'and6% aluminium chloride at 91C.
- the sheets obtain a grey-black coating, With the process in accordance wlth'the' nvention After rinsing in cold tap-water the aluminium sheets are given a l min after-treatment with an aqueous solution of 1.5% sodium chromate and 5% sodium carbonate at a temperature of C.
- the coatings obtained are smooth and black and exhibit a particularly good bonding base forthe lacquer.
- sheets of total surface area equal to 1.03 m can be treated without being able to determine a change in colour tone and layer thickness. After 1.05 m however the sheets are no longer black but begin to become increasingly gray and spotty.
- EXAMPLE 2 shows the influence of the after-treatment on the corrosion resistance. Aluminium sheets containing 1.1% Mn, 0.5% Fe, 0.3% Si and 0.1% Cu are part D is anodised and colored black. The corrosion re-' sistance of the treated samples A, B, C and D is tested in the salt spray test (3% NaCl at 35C), the Kestemich test (artificial industrial atmosphere containing 0.66 vol of both S0 and CO and the alkaline test (2% Na PO The results are presented in tables 1 to 3.
- Tables 1 and 2 show that sample A, with regard to corrosion resistance in the salt spray and Kesternich test, does not differ basically from sample C (classical alkaline chromatizing process) and D (anodised and then colored black in; accordance with the usual process), although these are among the best known processes.
- anodised sheets (as for example D) have a low resistance to alkalis and, compared with sample A, suffer a large weight loss.
- the process in accordance with the invention is therefore with respect to corrosion resistance at least the equal of other processes, but has the advantage over these, that it can be used without problem and without large expenditure for graphical reproduction purposes.
- green reflection 4,37 Cu 3 30 5 I5 dark brown bonded well and uniform 1.5% Mg (L671 Mn 0.4% Fe 4 2 min L8 dark brown to conded well and uniform black 5 3 min 2 black bonded well, treatment temperature not above 92C otherwise bluish coating 6 4 min 2 blue-black layer did not bond as well as in the case of No 5 With a treatment time of more than 4 min, the coating becomes dark blue and does not bond well.
- etching said surface with an aqueous iron chloride solution subsequently coloring the etched surface in a coloring bath comprising an aqueous solution containing from about grams to about grams per liter ammoniumhepta-molybdate and from about 10 grams to bath comprising an aqueous alkaline solution at a I 7 grams per liter sodium chromate and from about 30 to about 70 grams per liter sodium carbonate.
- saidaftertreatment bath contains from about to about 20 grams per liter ammonia or an ammonia derivative.
- ammonia derivative is hydrazine or hydroxyl amine.
Landscapes
- Chemical & Material Sciences (AREA)
- General Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Chemical Treatment Of Metals (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CH703573A CH584762A5 (enrdf_load_stackoverflow) | 1973-05-17 | 1973-05-17 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US3920488A true US3920488A (en) | 1975-11-18 |
Family
ID=4318919
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US464328A Expired - Lifetime US3920488A (en) | 1973-05-17 | 1974-04-25 | Process for coloring aluminum black |
Country Status (14)
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1994025640A1 (en) * | 1993-04-28 | 1994-11-10 | Henkel Corporation | Composition and process for imparting a bright blue color to zinc/aluminum alloy |
| WO2004108407A1 (en) * | 2003-06-05 | 2004-12-16 | Metal Coatings International Inc. | Compositions and methods for darkening and imparting corrosion-resistant properties to zinc or other active metals |
| US8793878B2 (en) | 2012-03-20 | 2014-08-05 | Aktiebolaget Skf | Method for manufacturing a rolling element bearing |
| US9322074B2 (en) | 2013-01-28 | 2016-04-26 | Aktiebolaget Skf | Rolling-element bearing and method of manufacturing thereof |
| CN106383048A (zh) * | 2016-09-07 | 2017-02-08 | 济南大学 | 一种用于岩相检验识别磷铝酸盐矿物浸蚀剂的制备 |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2959683B2 (ja) * | 1991-04-30 | 1999-10-06 | 三井鉱山株式会社 | 高純度アルミナ繊維成形体の製造方法 |
| DE29912766U1 (de) | 1999-07-21 | 1999-12-23 | Frank, Thomas, 55120 Mainz | Dunkle Metallfolie zur Erhöhung des Absorptions- und Emissionsgrades von Wärmestrahlung |
| DE102011080750A1 (de) * | 2011-08-10 | 2013-02-14 | Aktiebolaget Skf | Verfahren zur Steigerung der Widerstandskraft einer Brünierschicht und Bauteil mit Brünierschicht |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2285468A (en) * | 1941-07-08 | 1942-06-09 | Aluminum Co Of America | Surface treatment for aluminum |
| US2554256A (en) * | 1948-05-15 | 1951-05-22 | Westinghouse Electric Corp | Process for treating aluminum to provide selective coloration of portions thereof |
| US3326728A (en) * | 1963-08-06 | 1967-06-20 | Olin Mathieson | Colored aluminum and process therefor |
| US3391032A (en) * | 1963-06-27 | 1968-07-02 | Hooker Chemical Corp | Alkaline rinse for chromatized aluminum |
| US3799815A (en) * | 1971-12-15 | 1974-03-26 | C Subramaniam | Coloring of aluminum and its alloys |
| US3833374A (en) * | 1970-07-14 | 1974-09-03 | Metalphoto Corp | Coloring of anodized aluminum |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE480995C (de) * | 1926-04-16 | 1929-08-13 | Aladar Pacz Dr | Verfahren zum UEberziehen und Faerben von Metallen |
| DE712877C (de) * | 1939-03-11 | 1941-10-27 | Bosch Gmbh Robert | Verfahren zur Herstellung von schwarz gefaerbten korrosionsbestaendigen Schutzschichten auf der Oberflaeche von Gegenstaenden aus Aluminium oder Aluminiumlegierungen |
| DE762459C (de) * | 1942-07-17 | 1953-01-26 | Bosch Gmbh Robert | Verfahren zum Schwarzfaerben von Aluminium und dessen Legierungen |
-
1973
- 1973-05-17 CH CH703573A patent/CH584762A5/xx not_active IP Right Cessation
-
1974
- 1974-04-24 DE DE2419819A patent/DE2419819C2/de not_active Expired
- 1974-04-25 US US464328A patent/US3920488A/en not_active Expired - Lifetime
- 1974-05-10 GB GB2083874A patent/GB1416417A/en not_active Expired
- 1974-05-10 ES ES426179A patent/ES426179A1/es not_active Expired
- 1974-05-15 NO NO741762A patent/NO135032C/no unknown
- 1974-05-15 BE BE144336A patent/BE815058A/xx unknown
- 1974-05-16 SE SE7406541A patent/SE397968B/xx unknown
- 1974-05-16 BR BR3995/74A patent/BR7403995D0/pt unknown
- 1974-05-16 CA CA200,146A patent/CA1030409A/en not_active Expired
- 1974-05-16 AT AT406074A patent/AT328246B/de not_active IP Right Cessation
- 1974-05-17 IT IT22896/74A patent/IT1012497B/it active
- 1974-05-17 NL NL7406676A patent/NL7406676A/xx not_active Application Discontinuation
- 1974-05-17 FR FR7417376A patent/FR2229786B1/fr not_active Expired
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2285468A (en) * | 1941-07-08 | 1942-06-09 | Aluminum Co Of America | Surface treatment for aluminum |
| US2554256A (en) * | 1948-05-15 | 1951-05-22 | Westinghouse Electric Corp | Process for treating aluminum to provide selective coloration of portions thereof |
| US3391032A (en) * | 1963-06-27 | 1968-07-02 | Hooker Chemical Corp | Alkaline rinse for chromatized aluminum |
| US3326728A (en) * | 1963-08-06 | 1967-06-20 | Olin Mathieson | Colored aluminum and process therefor |
| US3833374A (en) * | 1970-07-14 | 1974-09-03 | Metalphoto Corp | Coloring of anodized aluminum |
| US3799815A (en) * | 1971-12-15 | 1974-03-26 | C Subramaniam | Coloring of aluminum and its alloys |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1994025640A1 (en) * | 1993-04-28 | 1994-11-10 | Henkel Corporation | Composition and process for imparting a bright blue color to zinc/aluminum alloy |
| WO2004108407A1 (en) * | 2003-06-05 | 2004-12-16 | Metal Coatings International Inc. | Compositions and methods for darkening and imparting corrosion-resistant properties to zinc or other active metals |
| US20060213389A1 (en) * | 2003-06-05 | 2006-09-28 | Pearce Michelle R | Compositions and methods for darkening and imparting corrosion-resistant properties to zinc or other active metals |
| EA008802B1 (ru) * | 2003-06-05 | 2007-08-31 | Метал Коутингс Интернэшнл Инк. | Композиции и способы чернения и придания коррозионно-стойких свойств цинку или другим активным металлам |
| US7641743B2 (en) * | 2003-06-05 | 2010-01-05 | Metal Coatings International Inc. | Compositions and methods for darkening and imparting corrosion-resistant properties to zinc or other active metals |
| US20100297354A1 (en) * | 2003-06-05 | 2010-11-25 | Metal Coatings International Inc. | Compositions and methods for darkening and imparting corrosion-resistant properties to zinc or other active metals |
| US8793878B2 (en) | 2012-03-20 | 2014-08-05 | Aktiebolaget Skf | Method for manufacturing a rolling element bearing |
| US9322074B2 (en) | 2013-01-28 | 2016-04-26 | Aktiebolaget Skf | Rolling-element bearing and method of manufacturing thereof |
| CN106383048A (zh) * | 2016-09-07 | 2017-02-08 | 济南大学 | 一种用于岩相检验识别磷铝酸盐矿物浸蚀剂的制备 |
| CN106383048B (zh) * | 2016-09-07 | 2018-09-11 | 济南大学 | 一种用于岩相检验识别磷铝酸盐矿物浸蚀剂的制备 |
Also Published As
| Publication number | Publication date |
|---|---|
| IT1012497B (it) | 1977-03-10 |
| BR7403995D0 (pt) | 1974-12-03 |
| ATA406074A (de) | 1975-05-15 |
| NO135032C (enrdf_load_stackoverflow) | 1977-01-26 |
| AT328246B (de) | 1976-03-10 |
| NL7406676A (enrdf_load_stackoverflow) | 1974-11-19 |
| NO135032B (enrdf_load_stackoverflow) | 1976-10-18 |
| SE397968B (sv) | 1977-11-28 |
| GB1416417A (en) | 1975-12-03 |
| FR2229786A1 (enrdf_load_stackoverflow) | 1974-12-13 |
| DE2419819C2 (de) | 1984-05-24 |
| CH584762A5 (enrdf_load_stackoverflow) | 1977-02-15 |
| CA1030409A (en) | 1978-05-02 |
| BE815058A (fr) | 1974-09-02 |
| DE2419819A1 (de) | 1974-12-05 |
| FR2229786B1 (enrdf_load_stackoverflow) | 1979-05-11 |
| ES426179A1 (es) | 1976-07-01 |
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