EP1574601A1 - Verfahren zur galvanischen Abscheidung von Zinkphosphat oder Zink-Calcium-Phosphat - Google Patents
Verfahren zur galvanischen Abscheidung von Zinkphosphat oder Zink-Calcium-Phosphat Download PDFInfo
- Publication number
- EP1574601A1 EP1574601A1 EP04006023A EP04006023A EP1574601A1 EP 1574601 A1 EP1574601 A1 EP 1574601A1 EP 04006023 A EP04006023 A EP 04006023A EP 04006023 A EP04006023 A EP 04006023A EP 1574601 A1 EP1574601 A1 EP 1574601A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- zinc
- phosphate
- calcium
- electrolyte
- phosphating
- 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.)
- Granted
Links
- 229910000165 zinc phosphate Inorganic materials 0.000 title claims abstract description 18
- LRXTYHSAJDENHV-UHFFFAOYSA-H zinc phosphate Chemical group [Zn+2].[Zn+2].[Zn+2].[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O LRXTYHSAJDENHV-UHFFFAOYSA-H 0.000 title claims abstract description 16
- IQBJFLXHQFMQRP-UHFFFAOYSA-K calcium;zinc;phosphate Chemical compound [Ca+2].[Zn+2].[O-]P([O-])([O-])=O IQBJFLXHQFMQRP-UHFFFAOYSA-K 0.000 title claims abstract description 13
- 238000000034 method Methods 0.000 title claims description 20
- 230000008021 deposition Effects 0.000 title claims description 8
- 239000003792 electrolyte Substances 0.000 claims abstract description 21
- 239000011701 zinc Substances 0.000 claims abstract description 15
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 claims abstract description 14
- 229910052725 zinc Inorganic materials 0.000 claims abstract description 9
- 239000000758 substrate Substances 0.000 claims abstract description 8
- 230000002378 acidificating effect Effects 0.000 claims abstract description 7
- 238000004070 electrodeposition Methods 0.000 claims abstract description 5
- BHPQYMZQTOCNFJ-UHFFFAOYSA-N Calcium cation Chemical compound [Ca+2] BHPQYMZQTOCNFJ-UHFFFAOYSA-N 0.000 claims abstract 2
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 claims abstract 2
- 229910001424 calcium ion Inorganic materials 0.000 claims abstract 2
- 238000000151 deposition Methods 0.000 claims description 7
- 150000004649 carbonic acid derivatives Chemical class 0.000 claims description 5
- 239000011575 calcium Substances 0.000 claims description 4
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 claims description 3
- 229960005069 calcium Drugs 0.000 claims description 3
- 229910052791 calcium Inorganic materials 0.000 claims description 3
- 230000004913 activation Effects 0.000 claims description 2
- 239000004020 conductor Substances 0.000 claims description 2
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 abstract description 9
- 229910052751 metal Inorganic materials 0.000 abstract description 8
- 239000002184 metal Substances 0.000 abstract description 8
- 229910000019 calcium carbonate Inorganic materials 0.000 abstract description 4
- 235000004416 zinc carbonate Nutrition 0.000 abstract description 3
- 239000011667 zinc carbonate Substances 0.000 abstract description 3
- 229910000010 zinc carbonate Inorganic materials 0.000 abstract description 3
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 description 13
- 238000000576 coating method Methods 0.000 description 9
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 8
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 description 7
- 229910019142 PO4 Inorganic materials 0.000 description 6
- 229910000147 aluminium phosphate Inorganic materials 0.000 description 6
- 239000010452 phosphate Substances 0.000 description 6
- 229910052742 iron Inorganic materials 0.000 description 5
- 230000015572 biosynthetic process Effects 0.000 description 4
- 235000010216 calcium carbonate Nutrition 0.000 description 4
- -1 iron ion Chemical class 0.000 description 4
- 239000000126 substance Substances 0.000 description 4
- 239000010802 sludge Substances 0.000 description 3
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 2
- 239000001506 calcium phosphate Substances 0.000 description 2
- 229960001714 calcium phosphate Drugs 0.000 description 2
- 229910000389 calcium phosphate Inorganic materials 0.000 description 2
- 235000011010 calcium phosphates Nutrition 0.000 description 2
- BVKZGUZCCUSVTD-UHFFFAOYSA-N carbonic acid Chemical compound OC(O)=O BVKZGUZCCUSVTD-UHFFFAOYSA-N 0.000 description 2
- 238000001311 chemical methods and process Methods 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- QORWJWZARLRLPR-UHFFFAOYSA-H tricalcium bis(phosphate) Chemical compound [Ca+2].[Ca+2].[Ca+2].[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O QORWJWZARLRLPR-UHFFFAOYSA-H 0.000 description 2
- FMRLDPWIRHBCCC-UHFFFAOYSA-L Zinc carbonate Chemical compound [Zn+2].[O-]C([O-])=O FMRLDPWIRHBCCC-UHFFFAOYSA-L 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 229910052783 alkali metal Inorganic materials 0.000 description 1
- 150000001340 alkali metals Chemical class 0.000 description 1
- LFVGISIMTYGQHF-UHFFFAOYSA-N ammonium dihydrogen phosphate Chemical compound [NH4+].OP(O)([O-])=O LFVGISIMTYGQHF-UHFFFAOYSA-N 0.000 description 1
- 239000002585 base Substances 0.000 description 1
- 230000003139 buffering effect Effects 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 150000001768 cations Chemical class 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000009713 electroplating Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- GPRLSGONYQIRFK-UHFFFAOYSA-N hydron Chemical compound [H+] GPRLSGONYQIRFK-UHFFFAOYSA-N 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 229910000398 iron phosphate Inorganic materials 0.000 description 1
- WBJZTOZJJYAKHQ-UHFFFAOYSA-K iron(3+) phosphate Chemical compound [Fe+3].[O-]P([O-])([O-])=O WBJZTOZJJYAKHQ-UHFFFAOYSA-K 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
- 125000002467 phosphate group Chemical group [H]OP(=O)(O[H])O[*] 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 238000005491 wire drawing Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D9/00—Electrolytic coating other than with metals
- C25D9/04—Electrolytic coating other than with metals with inorganic materials
- C25D9/08—Electrolytic coating other than with metals with inorganic materials by cathodic processes
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D11/00—Electrolytic coating by surface reaction, i.e. forming conversion layers
- C25D11/36—Phosphatising
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D9/00—Electrolytic coating other than with metals
- C25D9/04—Electrolytic coating other than with metals with inorganic materials
- C25D9/08—Electrolytic coating other than with metals with inorganic materials by cathodic processes
- C25D9/10—Electrolytic coating other than with metals with inorganic materials by cathodic processes on iron or steel
Definitions
- the present invention relates to a process for the electrodeposition of Zinc phosphate or zinc-calcium phosphate on metallic substrates of acidic Electrolyte.
- the protection of metallic surfaces, especially the protection of iron and Steel surfaces, by phosphate-containing coatings has been known for a long time.
- layer-forming phosphating is the use of alkali metal and / or ammonium orthophosphate solution for producing iron phosphate layers, in which the iron ion from the metallic to be coated Surface comes from.
- Layer-forming phosphatings are those in which the metal surface using zinc or zinc / calcium phosphate solutions Zinc phosphate coatings or zinc-calcium phosphate coatings be formed.
- Such phosphate coatings not only improve the corrosion protection of the Metal surfaces, but also increase liability for any later Coatings such.
- zinc phosphate or Zinc / calcium phosphate layers the properties of the coated substrates in the cold forming such. B. improve the wire drawing. Especially such layers lead to a reduction of the friction coefficients.
- European Patent Application EP 0 972 862 describes a method and a device for the electrodeposition of phosphate films Steel wires.
- European patent application EP 0 987 350 also discloses Method for electroplating a phosphate coating on workpieces with great length.
- the phosphate ions originate from the phosphoric acid H 3 PO 4 used , which dissociates to 3 H + and PO 4 3 , above all in the area of the diffusion layer.
- the phosphate ions participate in zinc phosphate layer formation and are deprived of chemical equilibrium.
- the protons originating from the acid remain in the reaction solution and lead to a shift in the equilibrium of the electrolyte.
- iron originating from the substrate to be coated reacts due to the high hydrogen ion concentration in the course of the process with forming hydrophosphations to iron hypophosphates, which precipitates as so-called phosphating and leads to impurities in the bath, this reaction is usually not found in electrolytically guided process instead of.
- the carbonates used dissociate to the metal cations and carbonate anions.
- the carbonate anions can react with the protons originating from the phosphoric acid to carbonic acid, which according to Henry's law as a function of pressure and temperature as carbonic acid (H 2 CO 3 ) remain in solution or can outgas as carbon dioxide (CO 2 ).
- zinc and / or calcium in the form of zinc and / or Calcium carbonate can be used.
- the further addition of carbonates leads to quantitative extension of the electrolyte.
- the galvanic phosphating can be started with a zinc-containing electrolyte to which calcium carbonate is added in the course of the process.
- the deposited layer changes in the course of the process from a zinc phosphate layer (Zn 3 (PO 4 ) 2 ) to a zinc calcium phosphate layer (Zn 2 Ca (PO 4 ) 2 ).
- This zinc-calcium phosphate layer has finer structures, which in cold forming processes such. B. the wire provides more favorable results.
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Electroplating Methods And Accessories (AREA)
Abstract
Description
Claims (3)
- Verfahren zur galvanischen Abscheidung von Zinkphosphat oder Zink-Calcium-Phosphat auf metallischen Substraten aus sauren Elektrolyten, dadurch gekennzeichnet, daß dem Elektrolyten Zink und/oder Calcium zumindest in Form ihrer Carbonate zugesetzt wird.
- Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß nach dem Mittelleiterverfahren die Aktivierung anodisch und die Phosphatierung katodisch betrieben werden.
- Saurer Elektrolyt zur galvanischen Abscheidung von Zinkphosphat oder Zink-Calcium-Phosphat auf metallischen Substraten, dadurch gekennzeichnet, daß der Elektrolyt neben Zink und/oder Calciumionen Carbonationen aufweist.
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP04006023A EP1574601B1 (de) | 2004-03-13 | 2004-03-13 | Verfahren zur galvanischen Abscheidung von Zinkphosphat oder Zink-Calcium-Phosphat |
DE502004010850T DE502004010850D1 (de) | 2004-03-13 | 2004-03-13 | Verfahren zur galvanischen Abscheidung von Zinkphosphat oder Zink-Calcium-Phosphat |
PL04006023T PL1574601T3 (pl) | 2004-03-13 | 2004-03-13 | Sposób galwanicznego osadzania fosforanu cynku lub fosforanu cynkowo-wapniowego |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP04006023A EP1574601B1 (de) | 2004-03-13 | 2004-03-13 | Verfahren zur galvanischen Abscheidung von Zinkphosphat oder Zink-Calcium-Phosphat |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1574601A1 true EP1574601A1 (de) | 2005-09-14 |
EP1574601B1 EP1574601B1 (de) | 2010-03-03 |
Family
ID=34814328
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP04006023A Expired - Lifetime EP1574601B1 (de) | 2004-03-13 | 2004-03-13 | Verfahren zur galvanischen Abscheidung von Zinkphosphat oder Zink-Calcium-Phosphat |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP1574601B1 (de) |
DE (1) | DE502004010850D1 (de) |
PL (1) | PL1574601T3 (de) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2015055335A1 (de) * | 2013-10-15 | 2015-04-23 | Elringklinger Ag | Metallische flachdichtung |
Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1856261A (en) * | 1929-01-26 | 1932-05-03 | Gen Motors Corp | Coating surfaces of iron or steel |
US4639295A (en) * | 1984-08-14 | 1987-01-27 | Amchem Products, Inc. | Zinc phosphating method |
US4874480A (en) | 1987-04-20 | 1989-10-17 | Henkel Corporation | Process for treatment of titanium and titanium alloys |
WO1991019836A1 (en) | 1990-06-01 | 1991-12-26 | Henkel Corporation | Method for treating the surface of steel |
US5525431A (en) | 1989-12-12 | 1996-06-11 | Nippon Steel Corporation | Zinc-base galvanized sheet steel excellent in press-formability, phosphatability, etc. and process for producing the same |
JPH10317190A (ja) * | 1997-05-19 | 1998-12-02 | Nippon Steel Corp | 鋼材の表面処理方法およびその装置 |
WO2000052227A1 (en) | 1999-03-02 | 2000-09-08 | Henkel Corporation | Nonsludging zinc phosphating composition and process |
-
2004
- 2004-03-13 PL PL04006023T patent/PL1574601T3/pl unknown
- 2004-03-13 EP EP04006023A patent/EP1574601B1/de not_active Expired - Lifetime
- 2004-03-13 DE DE502004010850T patent/DE502004010850D1/de not_active Expired - Lifetime
Patent Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1856261A (en) * | 1929-01-26 | 1932-05-03 | Gen Motors Corp | Coating surfaces of iron or steel |
US4639295A (en) * | 1984-08-14 | 1987-01-27 | Amchem Products, Inc. | Zinc phosphating method |
US4874480A (en) | 1987-04-20 | 1989-10-17 | Henkel Corporation | Process for treatment of titanium and titanium alloys |
US5525431A (en) | 1989-12-12 | 1996-06-11 | Nippon Steel Corporation | Zinc-base galvanized sheet steel excellent in press-formability, phosphatability, etc. and process for producing the same |
WO1991019836A1 (en) | 1990-06-01 | 1991-12-26 | Henkel Corporation | Method for treating the surface of steel |
JPH10317190A (ja) * | 1997-05-19 | 1998-12-02 | Nippon Steel Corp | 鋼材の表面処理方法およびその装置 |
WO2000052227A1 (en) | 1999-03-02 | 2000-09-08 | Henkel Corporation | Nonsludging zinc phosphating composition and process |
Non-Patent Citations (1)
Title |
---|
PATENT ABSTRACTS OF JAPAN vol. 1999, no. 03 31 March 1999 (1999-03-31) * |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2015055335A1 (de) * | 2013-10-15 | 2015-04-23 | Elringklinger Ag | Metallische flachdichtung |
Also Published As
Publication number | Publication date |
---|---|
DE502004010850D1 (de) | 2010-04-15 |
PL1574601T3 (pl) | 2010-08-31 |
EP1574601B1 (de) | 2010-03-03 |
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