US3625777A - Process for phosphate conversion coating - Google Patents
Process for phosphate conversion coating Download PDFInfo
- Publication number
- US3625777A US3625777A US872022A US3625777DA US3625777A US 3625777 A US3625777 A US 3625777A US 872022 A US872022 A US 872022A US 3625777D A US3625777D A US 3625777DA US 3625777 A US3625777 A US 3625777A
- Authority
- US
- United States
- Prior art keywords
- starch
- coating
- zinc
- paint
- panels
- 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 24
- 238000007746 phosphate conversion coating Methods 0.000 title claims abstract description 8
- 230000008569 process Effects 0.000 title abstract description 7
- 229920002472 Starch Polymers 0.000 claims abstract description 36
- 239000008107 starch Substances 0.000 claims abstract description 36
- 235000019698 starch Nutrition 0.000 claims abstract description 35
- 239000002184 metal Substances 0.000 claims abstract description 26
- 229910052751 metal Inorganic materials 0.000 claims abstract description 26
- LRXTYHSAJDENHV-UHFFFAOYSA-H zinc phosphate Chemical compound [Zn+2].[Zn+2].[Zn+2].[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O LRXTYHSAJDENHV-UHFFFAOYSA-H 0.000 claims abstract description 21
- 229910000165 zinc phosphate Inorganic materials 0.000 claims abstract description 21
- 239000011701 zinc Substances 0.000 claims abstract description 13
- 239000002253 acid Substances 0.000 claims abstract description 11
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 10
- 229920000881 Modified starch Polymers 0.000 claims abstract description 10
- 235000019426 modified starch Nutrition 0.000 claims abstract description 10
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 8
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 claims abstract description 8
- 150000004676 glycans Chemical class 0.000 claims abstract description 8
- 229920001282 polysaccharide Polymers 0.000 claims abstract description 8
- 239000005017 polysaccharide Substances 0.000 claims abstract description 8
- 239000010959 steel Substances 0.000 claims abstract description 8
- 229910052725 zinc Inorganic materials 0.000 claims abstract description 8
- 150000001720 carbohydrates Chemical class 0.000 claims abstract description 7
- 235000014633 carbohydrates Nutrition 0.000 claims abstract description 7
- 238000000354 decomposition reaction Methods 0.000 claims abstract description 6
- 229910052742 iron Inorganic materials 0.000 claims abstract description 5
- 239000000203 mixture Substances 0.000 claims description 13
- 238000005507 spraying Methods 0.000 claims description 7
- 229910001297 Zn alloy Inorganic materials 0.000 claims description 3
- 238000000576 coating method Methods 0.000 abstract description 44
- 239000011248 coating agent Substances 0.000 abstract description 35
- 239000003973 paint Substances 0.000 abstract description 22
- 150000002739 metals Chemical class 0.000 abstract description 7
- 238000005260 corrosion Methods 0.000 abstract description 6
- 230000007797 corrosion Effects 0.000 abstract description 6
- 230000006872 improvement Effects 0.000 abstract description 4
- 229910045601 alloy Inorganic materials 0.000 abstract description 2
- 239000000956 alloy Substances 0.000 abstract description 2
- 239000000243 solution Substances 0.000 description 29
- 239000000654 additive Substances 0.000 description 11
- 229910019142 PO4 Inorganic materials 0.000 description 7
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 description 7
- 239000010452 phosphate Substances 0.000 description 7
- 229910001335 Galvanized steel Inorganic materials 0.000 description 6
- 239000008397 galvanized steel Substances 0.000 description 6
- 238000005452 bending Methods 0.000 description 5
- 229920001353 Dextrin Polymers 0.000 description 4
- 239000010953 base metal Substances 0.000 description 4
- 230000008859 change Effects 0.000 description 4
- 238000005336 cracking Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 238000007598 dipping method Methods 0.000 description 4
- 238000010422 painting Methods 0.000 description 4
- 239000004375 Dextrin Substances 0.000 description 3
- 206010040844 Skin exfoliation Diseases 0.000 description 3
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 3
- 235000019425 dextrin Nutrition 0.000 description 3
- 239000012895 dilution Substances 0.000 description 3
- 238000010790 dilution Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 230000001965 increasing effect Effects 0.000 description 3
- 230000009467 reduction Effects 0.000 description 3
- 238000011282 treatment Methods 0.000 description 3
- 230000000996 additive effect Effects 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 239000000084 colloidal system Substances 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 239000013078 crystal Substances 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000001681 protective effect Effects 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 125000000022 2-aminoethyl group Chemical group [H]C([*])([H])C([H])([H])N([H])[H] 0.000 description 1
- MOMKYJPSVWEWPM-UHFFFAOYSA-N 4-(chloromethyl)-2-(4-methylphenyl)-1,3-thiazole Chemical compound C1=CC(C)=CC=C1C1=NC(CCl)=CS1 MOMKYJPSVWEWPM-UHFFFAOYSA-N 0.000 description 1
- 229920000945 Amylopectin Polymers 0.000 description 1
- 229920000856 Amylose Polymers 0.000 description 1
- 229920001612 Hydroxyethyl starch Polymers 0.000 description 1
- 229920000388 Polyphosphate Polymers 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 239000002390 adhesive tape Substances 0.000 description 1
- 229920000180 alkyd Polymers 0.000 description 1
- 125000000217 alkyl group Chemical group 0.000 description 1
- 125000003118 aryl group Chemical group 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- FYGDTMLNYKFZSV-MRCIVHHJSA-N dextrin Chemical compound O[C@@H]1[C@@H](O)[C@H](O)[C@@H](CO)OC1O[C@@H]1[C@@H](CO)OC(O[C@@H]2[C@H](O[C@H](O)[C@H](O)[C@H]2O)CO)[C@H](O)[C@H]1O FYGDTMLNYKFZSV-MRCIVHHJSA-N 0.000 description 1
- 238000007865 diluting Methods 0.000 description 1
- 230000007062 hydrolysis Effects 0.000 description 1
- 238000006460 hydrolysis reaction Methods 0.000 description 1
- 229940050526 hydroxyethylstarch Drugs 0.000 description 1
- 239000003112 inhibitor Substances 0.000 description 1
- 229910021645 metal ion Inorganic materials 0.000 description 1
- SNICXCGAKADSCV-UHFFFAOYSA-N nicotine Chemical compound CN1CCCC1C1=CC=CN=C1 SNICXCGAKADSCV-UHFFFAOYSA-N 0.000 description 1
- 235000013808 oxidized starch Nutrition 0.000 description 1
- 239000001254 oxidized starch Substances 0.000 description 1
- 239000001205 polyphosphate Substances 0.000 description 1
- 235000011176 polyphosphates Nutrition 0.000 description 1
- 238000003908 quality control method Methods 0.000 description 1
- 235000019983 sodium metaphosphate Nutrition 0.000 description 1
- 150000005846 sugar alcohols Polymers 0.000 description 1
Images
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
- C23C22/07—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 phosphates
- C23C22/08—Orthophosphates
- C23C22/12—Orthophosphates containing zinc cations
Definitions
- This invention relates to improvements in process for phosphate conversion coating, that is, a method for forming coating films'of zinc phosphate on surfaces of metals, particularly iron, steel, zinc and its alloys (including electrogalvanized and hot dip galvanized steel,) and is aimed to attain fine and dense crystalline structure of zinc phosphate of the coating, along with considerable reduction in weight (or in thickness) of saidcoating and increasing in adherence of the same to base metals, thereby to improve paint bonding quality of the coating when the paint is applied to said coating and corrosion resistance of the coated metals.
- a particular object of this invention is to provide a method for the fonnation of strong zinc phosphate coating which can withstand bending up to 180 or other severe mechanical forming operation without failing such as falling off, cracks or other ruptures.
- This invention is available in very wide range as far as the acid zinc phosphate coating concerns, and is able to get similarly good results irrespective of kinds of metals to be coated, and in turn, irrespective of composition of ordinary treating solution to be used. Accordingly, with any of iron, steel, zinc or zinc alloys the above-mentioned objects are easily attained by the method of this invention, and these wide versatility constitutes an important special feature of this invention.
- FIG. 1 is a diagram showing adhesiveness of zinc phosphate conversion coatings of the present invention which are applied on zinc galvanized steel sheets, and
- FIG. 2 is a diagram showing the weights of said coatings.
- FIG. 1 and 2 show respectively adhesiveness and weight of coatings both against change of added quantity of starch or like additives, when zinc phosphate conversion treatments upon zinc galvanized steel panel are processed in acid treating solution for zinc phosphate coating such as described later in our examples added by 0.0 l-l .0 percent by weight of soluble starch such as starch phosphate, dextrine according to this invention.
- Starch or thelike materials which are available as additives according to the feature of this invention, are for example as follows: amylose, amylopectin, dextrin, starch, starch derivatives and, polysaccharides produced from acid decomposition of these, and as said starch derivatives, are included oxidized starch, starch phosphate, nitro-starch, starch sulfate carboxyl starch, hydroxyethyl starch, aminoethyl starch, alkyl starch and aryl starch.
- This invention resides in adding one or more of starch or other polysaccharides such as described above by 0.0l-l.0 weight percent in total to a usual acid zinc phosphate coating solution.
- Treating solution according to this invention is obtained only by adding a certain quantity of starch or other polysaccharides to the treating solution.
- treating conditions including pH value, commonly employed conditions or values are available, and out of them appropriate ones may be selected depending upon the kind of metal to be treated. However, generally speaking, pH in the range of 2 to 3, a temperature in the range of 40 to C., and the treating time, in the case of spraying, from 3 to 10 seconds, while, in the case of dipping, from 5 seconds to 3 minutes, may be adequate.
- Treating solution was prepared by diluting above described concentrated solution in 6 weight percent dilution and by adding 001-1 .0 weight percent of soluble starch or dextrin.
- the prepared treating solution was heated to 40-70 C., and electrogalvanized or hot-dip-galvanized steel panels were subjected to spraying of the heated solution for 3-10 sec. or were dipped in a bath of the heated solution for 5-30 sec. By this treatment, zinc phosphate coating films firmly bound to the surfaces of said panels were obtained.
- Treating solution was prepared by adding 0.2 g./l. of polyphosphate (such as sodium metaphosphate) and 0.l-1.0 weight percent of soluble starch or dextrin to 6 weight percent aqueous dilution of said concentrated solution shown in example l.
- the treating solution was heated to 40-70 C., and electrogalvanized or hot-dip-galvanized panels were treated with this heated solution by spraying or dipping, and after the treatment, zinc phosphate coatings in the form of fine, dense and uniform crystalline structure, having coating weight of l .2-l .8 g./m. and uniform appearance were obtained.
- EXAMPLE 3 Composition of treating solution: Zn 1.6 g./l. P0, 5.9 g./l. NO; 1.8 g./l. SiF 1.3 g./l. Ni 1.3 gJl. H 0 remainder
- the above-indicated treating solution was added with 0.0 1-1 .0 weight percent of starch phosphate, and after heated to 40-70 C., was applied to electrogalvanized or hot-dip-galvanized steel panels by spraying or dipping. Obtained crystalline zinc phosphate coating were fine and uniform structure, having smooth appearance and film weight within a range of 1.2-1.8 g./m..
- EXAMPLE 4 Composition of treating solution: Zn 5.5 g./l. Ni 0.3 g./l. P0, 16.4 g./l. N0 4.4 g./l. H O remainder Treating solution was heated to 40-70 C., and after added with 0.0l-l.0 weight percent of starch phosphate, was applied to elcctrogalvanized steel panels by spraying or dipping. The thus obtained zinc phosphate coating was uniform and had fine crystalline structure firmly bound to base metal, having film weight of 0.7-1 .5 g./m.
- films obtained by prior method without an addition of starch phosphate were coarse in crystalline structure, lacking uniformity, and coating weight reached at 4.5 g./m.
- EXAMPLE 5 Composition of treating solution: Zn 2.4 g./l. Ni 0.3 g./l. P0 6.8 g./l. N0 l.6 g./l. sis, 0.4 g./l. H 0 remainder Above solution were heated 40-50 C., and applied to surfaces of steel panels in two ways, that is, as itself (without addition) and after added with 2-3 g./l. of starch phosphate according to this invention.,The weights of coatings obtained in the former case were 2-3 g./m. while those of the latter case were decreased greatly down to 0.8-1.2 g./m., and moreover, the obtained coatings were far fine, dense and uniform, and firmly bound to the base metal.
- a method for forming zinc-phosphate-conversion coatings on a metal surface comprising treating said metal surface with an aqueous zinc-phosphate-coating solution having incorporated therein at least one carbohydrate independently selected from the group consisting of starch, starch derivative, and polysaccharides produced by acid decomposition of starch or starch derivatives, wherein said carbohydrate is present in an amount from 0.01 to 1 percent by weight of the solution.
- An aqueous composition useful for forming a zinc phosphate conversion coating on a metal surface comprising having incorporated into said composition from 0.01 to l percent by weight of the composition a carbohydrate independently selected from the group consisting of starch, starch derivative and polysaccharides produced by acid decomposition of starch or starch derivative.
- composition of claim No. 5 wherein the carbohydrate is starch.
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)
- Application Of Or Painting With Fluid Materials (AREA)
- Polysaccharides And Polysaccharide Derivatives (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7891868 | 1968-10-31 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US3625777A true US3625777A (en) | 1971-12-07 |
Family
ID=13675218
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US872022A Expired - Lifetime US3625777A (en) | 1968-10-31 | 1969-10-29 | Process for phosphate conversion coating |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US3625777A (enrdf_load_stackoverflow) |
| DE (1) | DE1955002C3 (enrdf_load_stackoverflow) |
| FR (1) | FR2022052A1 (enrdf_load_stackoverflow) |
| GB (1) | GB1257947A (enrdf_load_stackoverflow) |
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3776782A (en) * | 1971-03-15 | 1973-12-04 | Amchem Prod | Polyester and polyamide adhesion improvers |
| US4497668A (en) * | 1982-12-08 | 1985-02-05 | Gerhard Collardin Gmbh | Phosphating process for zinc-plated metals |
| US4762572A (en) * | 1985-10-18 | 1988-08-09 | Gerhard Collardin Gmbh | Process for phosphating electrolytically zinc-coated metals |
| US5378292A (en) * | 1993-12-15 | 1995-01-03 | Henkel Corporation | Phosphate conversion coating and compositions and concentrates therefor with stable internal accelerator |
| WO2000005066A1 (en) * | 1998-07-21 | 2000-02-03 | Henkel Corporation | Conditioning metal surfaces before phosphating them |
| US6478860B1 (en) * | 1998-07-21 | 2002-11-12 | Henkel Corporation | Conditioning metal surfaces before phosphating them |
| US20040011428A1 (en) * | 2000-10-06 | 2004-01-22 | Mitsuru Nakamura | Surface-treating agent for metallic material with excellent suitability for press forming and chemical treatment and method of treatment |
| US20060228481A1 (en) * | 2003-01-11 | 2006-10-12 | Georg Gros | Method for coating metallic surfaces, coating composition, and coatings produced in said manner |
| US20130306185A1 (en) * | 2012-05-18 | 2013-11-21 | Tube-Mac Industries, Ltd. | Method of Making Hydralic Tubing |
| US9255332B2 (en) | 2013-09-05 | 2016-02-09 | Ppg Industries Ohio, Inc. | Activating rinse and method for treating a substrate |
| CN114427089A (zh) * | 2020-09-21 | 2022-05-03 | 中国石油化工股份有限公司 | 无磷预膜剂和循环水系统预膜处理的方法及其应用 |
| US11518960B2 (en) | 2016-08-24 | 2022-12-06 | Ppg Industries Ohio, Inc. | Alkaline molybdenum cation and phosphonate-containing cleaning composition |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5811515B2 (ja) * | 1979-05-11 | 1983-03-03 | 日本ペイント株式会社 | 金属表面にリン酸亜鉛皮膜を形成するための組成物 |
| DE19523919A1 (de) * | 1995-06-30 | 1997-01-02 | Metallgesellschaft Ag | Verfahren zur Ergänzung von Phosphatierungslösung |
| US6179934B1 (en) | 1997-01-24 | 2001-01-30 | Henkel Corporation | Aqueous phosphating composition and process for metal surfaces |
| JPH10204649A (ja) * | 1997-01-24 | 1998-08-04 | Nippon Parkerizing Co Ltd | 金属表面のりん酸塩処理水溶液及び処理方法 |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1329573A (en) * | 1919-09-25 | 1920-02-03 | William H Allen | Rust preventing and arresting solution |
| US1514494A (en) * | 1922-05-29 | 1924-11-04 | Randall Williams Company | Rust remover and preventative |
| US2137370A (en) * | 1935-12-11 | 1938-11-22 | Unger Theodor Broch | Method of coating iron and steel surfaces |
| FR865727A (fr) * | 1940-02-08 | 1941-05-31 | Procédé de phosphatation permettant la préparation et la phosphatation des surfaces métalliques | |
| CA478620A (en) * | 1951-11-13 | Thome-Johannesen Ole | Methods of and materials for production of protecting coatings on iron and steel surfaces and iron objects of any kind or shape | |
| US2854369A (en) * | 1957-10-04 | 1958-09-30 | Oakite Prod Inc | Increasing the solubility of metal accelerators in phosphatizing solutions |
-
1969
- 1969-10-29 GB GB1257947D patent/GB1257947A/en not_active Expired
- 1969-10-29 US US872022A patent/US3625777A/en not_active Expired - Lifetime
- 1969-10-31 DE DE1955002A patent/DE1955002C3/de not_active Expired
- 1969-10-31 FR FR6937491A patent/FR2022052A1/fr not_active Withdrawn
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA478620A (en) * | 1951-11-13 | Thome-Johannesen Ole | Methods of and materials for production of protecting coatings on iron and steel surfaces and iron objects of any kind or shape | |
| US1329573A (en) * | 1919-09-25 | 1920-02-03 | William H Allen | Rust preventing and arresting solution |
| US1514494A (en) * | 1922-05-29 | 1924-11-04 | Randall Williams Company | Rust remover and preventative |
| US2137370A (en) * | 1935-12-11 | 1938-11-22 | Unger Theodor Broch | Method of coating iron and steel surfaces |
| FR865727A (fr) * | 1940-02-08 | 1941-05-31 | Procédé de phosphatation permettant la préparation et la phosphatation des surfaces métalliques | |
| US2854369A (en) * | 1957-10-04 | 1958-09-30 | Oakite Prod Inc | Increasing the solubility of metal accelerators in phosphatizing solutions |
Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3776782A (en) * | 1971-03-15 | 1973-12-04 | Amchem Prod | Polyester and polyamide adhesion improvers |
| US4497668A (en) * | 1982-12-08 | 1985-02-05 | Gerhard Collardin Gmbh | Phosphating process for zinc-plated metals |
| US4762572A (en) * | 1985-10-18 | 1988-08-09 | Gerhard Collardin Gmbh | Process for phosphating electrolytically zinc-coated metals |
| US5378292A (en) * | 1993-12-15 | 1995-01-03 | Henkel Corporation | Phosphate conversion coating and compositions and concentrates therefor with stable internal accelerator |
| WO1995016805A1 (en) * | 1993-12-15 | 1995-06-22 | Henkel Corporation | Phosphate conversion coating and compositions and concentrates therefor with stable internal accelerator |
| US6478860B1 (en) * | 1998-07-21 | 2002-11-12 | Henkel Corporation | Conditioning metal surfaces before phosphating them |
| WO2000005066A1 (en) * | 1998-07-21 | 2000-02-03 | Henkel Corporation | Conditioning metal surfaces before phosphating them |
| US20040011428A1 (en) * | 2000-10-06 | 2004-01-22 | Mitsuru Nakamura | Surface-treating agent for metallic material with excellent suitability for press forming and chemical treatment and method of treatment |
| US20060228481A1 (en) * | 2003-01-11 | 2006-10-12 | Georg Gros | Method for coating metallic surfaces, coating composition, and coatings produced in said manner |
| US20130306185A1 (en) * | 2012-05-18 | 2013-11-21 | Tube-Mac Industries, Ltd. | Method of Making Hydralic Tubing |
| US9365944B2 (en) * | 2012-05-18 | 2016-06-14 | Tube-Mac Piping Technologies Ltd. | Method of making hydralic tubing |
| US9255332B2 (en) | 2013-09-05 | 2016-02-09 | Ppg Industries Ohio, Inc. | Activating rinse and method for treating a substrate |
| US11518960B2 (en) | 2016-08-24 | 2022-12-06 | Ppg Industries Ohio, Inc. | Alkaline molybdenum cation and phosphonate-containing cleaning composition |
| CN114427089A (zh) * | 2020-09-21 | 2022-05-03 | 中国石油化工股份有限公司 | 无磷预膜剂和循环水系统预膜处理的方法及其应用 |
| CN114427089B (zh) * | 2020-09-21 | 2024-05-07 | 中国石油化工股份有限公司 | 无磷预膜剂和循环水系统预膜处理的方法及其应用 |
Also Published As
| Publication number | Publication date |
|---|---|
| DE1955002A1 (de) | 1970-09-10 |
| DE1955002B2 (de) | 1977-12-15 |
| FR2022052A1 (enrdf_load_stackoverflow) | 1970-07-24 |
| GB1257947A (enrdf_load_stackoverflow) | 1971-12-22 |
| DE1955002C3 (de) | 1978-08-24 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| AS | Assignment |
Owner name: HOOKER CHEMICALS & PLASTICS CORP 32100 STEPHENSON Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:OXY METAL INDUSTRIES CORPORATION;REEL/FRAME:003942/0016 Effective date: 19810317 |
|
| AS | Assignment |
Owner name: OXY METAL INDUSTRIES CORPORATION Free format text: CHANGE OF NAME;ASSIGNOR:OXY METAL FINISHING CORPORATION;REEL/FRAME:003967/0084 Effective date: 19741220 |
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| AS | Assignment |
Owner name: OCCIDENTAL CHEMICAL CORPORATION Free format text: CHANGE OF NAME;ASSIGNOR:HOOKER CHEMICAS & PLASTICS CORP.;REEL/FRAME:004126/0054 Effective date: 19820330 |