US1911726A - Production of phosphate coatings on metals - Google Patents
Production of phosphate coatings on metals Download PDFInfo
- Publication number
- US1911726A US1911726A US549312A US54931231A US1911726A US 1911726 A US1911726 A US 1911726A US 549312 A US549312 A US 549312A US 54931231 A US54931231 A US 54931231A US 1911726 A US1911726 A US 1911726A
- Authority
- US
- United States
- Prior art keywords
- bath
- phosphate
- coating
- metal
- hydrogen
- 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
- 229910019142 PO4 Inorganic materials 0.000 title description 37
- 238000000576 coating method Methods 0.000 title description 37
- 229910052751 metal Inorganic materials 0.000 title description 28
- 239000002184 metal Substances 0.000 title description 28
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 title description 27
- 239000010452 phosphate Substances 0.000 title description 27
- 238000004519 manufacturing process Methods 0.000 title description 6
- 150000002739 metals Chemical class 0.000 title description 6
- 235000021317 phosphate Nutrition 0.000 description 36
- VWDWKYIASSYTQR-UHFFFAOYSA-N sodium nitrate Chemical compound [Na+].[O-][N+]([O-])=O VWDWKYIASSYTQR-UHFFFAOYSA-N 0.000 description 31
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 28
- 239000011248 coating agent Substances 0.000 description 28
- 239000007800 oxidant agent Substances 0.000 description 20
- 229910052739 hydrogen Inorganic materials 0.000 description 18
- 239000001257 hydrogen Substances 0.000 description 18
- 239000004317 sodium nitrate Substances 0.000 description 16
- 235000010344 sodium nitrate Nutrition 0.000 description 15
- 229910052742 iron Inorganic materials 0.000 description 14
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 11
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 10
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 9
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 description 8
- 239000000463 material Substances 0.000 description 8
- 229910002651 NO3 Inorganic materials 0.000 description 7
- NHNBFGGVMKEFGY-UHFFFAOYSA-N Nitrate Chemical compound [O-][N+]([O-])=O NHNBFGGVMKEFGY-UHFFFAOYSA-N 0.000 description 7
- 239000002253 acid Substances 0.000 description 7
- 150000002431 hydrogen Chemical class 0.000 description 7
- 150000003013 phosphoric acid derivatives Chemical class 0.000 description 7
- 230000001590 oxidative effect Effects 0.000 description 6
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 description 5
- 229910000831 Steel Inorganic materials 0.000 description 5
- 229910000019 calcium carbonate Inorganic materials 0.000 description 5
- 230000000694 effects Effects 0.000 description 5
- 229940116007 ferrous phosphate Drugs 0.000 description 5
- 229910000155 iron(II) phosphate Inorganic materials 0.000 description 5
- SDEKDNPYZOERBP-UHFFFAOYSA-H iron(ii) phosphate Chemical compound [Fe+2].[Fe+2].[Fe+2].[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O SDEKDNPYZOERBP-UHFFFAOYSA-H 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 150000003839 salts Chemical class 0.000 description 5
- 239000010959 steel Substances 0.000 description 5
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 4
- SXDBWCPKPHAZSM-UHFFFAOYSA-M bromate Chemical class [O-]Br(=O)=O SXDBWCPKPHAZSM-UHFFFAOYSA-M 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 4
- 229910052802 copper Inorganic materials 0.000 description 4
- 239000010949 copper Substances 0.000 description 4
- NBIIXXVUZAFLBC-UHFFFAOYSA-M dihydrogenphosphate Chemical compound OP(O)([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-M 0.000 description 4
- NUJOXMJBOLGQSY-UHFFFAOYSA-N manganese dioxide Chemical compound O=[Mn]=O NUJOXMJBOLGQSY-UHFFFAOYSA-N 0.000 description 4
- 239000000843 powder Substances 0.000 description 4
- 239000000126 substance Substances 0.000 description 4
- COQLPRJCUIATTQ-UHFFFAOYSA-N Uranyl acetate Chemical compound O.O.O=[U]=O.CC(O)=O.CC(O)=O COQLPRJCUIATTQ-UHFFFAOYSA-N 0.000 description 3
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 3
- -1 ferrous phosphates Chemical class 0.000 description 3
- 239000004615 ingredient Substances 0.000 description 3
- 238000002156 mixing Methods 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 230000003647 oxidation Effects 0.000 description 3
- 238000007254 oxidation reaction Methods 0.000 description 3
- 239000011701 zinc Substances 0.000 description 3
- 229910052725 zinc Inorganic materials 0.000 description 3
- AZQWKYJCGOJGHM-UHFFFAOYSA-N 1,4-benzoquinone Chemical compound O=C1C=CC(=O)C=C1 AZQWKYJCGOJGHM-UHFFFAOYSA-N 0.000 description 2
- 230000001464 adherent effect Effects 0.000 description 2
- 229910052783 alkali metal Inorganic materials 0.000 description 2
- 150000001340 alkali metals Chemical class 0.000 description 2
- 229910052784 alkaline earth metal Chemical class 0.000 description 2
- 229910000147 aluminium phosphate Inorganic materials 0.000 description 2
- 230000005587 bubbling Effects 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 239000000470 constituent Substances 0.000 description 2
- 230000001627 detrimental effect Effects 0.000 description 2
- CPSYWNLKRDURMG-UHFFFAOYSA-L hydron;manganese(2+);phosphate Chemical compound [Mn+2].OP([O-])([O-])=O CPSYWNLKRDURMG-UHFFFAOYSA-L 0.000 description 2
- 150000002823 nitrates Chemical class 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- FGIUAXJPYTZDNR-UHFFFAOYSA-N potassium nitrate Chemical compound [K+].[O-][N+]([O-])=O FGIUAXJPYTZDNR-UHFFFAOYSA-N 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 1
- XTEGARKTQYYJKE-UHFFFAOYSA-M Chlorate Chemical class [O-]Cl(=O)=O XTEGARKTQYYJKE-UHFFFAOYSA-M 0.000 description 1
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 description 1
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 1
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 description 1
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 description 1
- LSNNMFCWUKXFEE-UHFFFAOYSA-N Sulfurous acid Chemical class OS(O)=O LSNNMFCWUKXFEE-UHFFFAOYSA-N 0.000 description 1
- FMRLDPWIRHBCCC-UHFFFAOYSA-L Zinc carbonate Chemical compound [Zn+2].[O-]C([O-])=O FMRLDPWIRHBCCC-UHFFFAOYSA-L 0.000 description 1
- 150000001342 alkaline earth metals Chemical class 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000009835 boiling Methods 0.000 description 1
- 229910052791 calcium Inorganic materials 0.000 description 1
- 239000011575 calcium Substances 0.000 description 1
- ZCDOYSPFYFSLEW-UHFFFAOYSA-N chromate(2-) Chemical class [O-][Cr]([O-])(=O)=O ZCDOYSPFYFSLEW-UHFFFAOYSA-N 0.000 description 1
- 238000002425 crystallisation Methods 0.000 description 1
- 230000008025 crystallization Effects 0.000 description 1
- NAAXGLXYRDSIRS-UHFFFAOYSA-L dihydrogen phosphate;manganese(2+) Chemical compound [Mn+2].OP(O)([O-])=O.OP(O)([O-])=O NAAXGLXYRDSIRS-UHFFFAOYSA-L 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 238000010410 dusting Methods 0.000 description 1
- 230000009931 harmful effect Effects 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- ICIWUVCWSCSTAQ-UHFFFAOYSA-N iodic acid Chemical class OI(=O)=O ICIWUVCWSCSTAQ-UHFFFAOYSA-N 0.000 description 1
- 229910052748 manganese Inorganic materials 0.000 description 1
- 239000011572 manganese Substances 0.000 description 1
- GEYXPJBPASPPLI-UHFFFAOYSA-N manganese(III) oxide Inorganic materials O=[Mn]O[Mn]=O GEYXPJBPASPPLI-UHFFFAOYSA-N 0.000 description 1
- CXKWCBBOMKCUKX-UHFFFAOYSA-M methylene blue Chemical compound [Cl-].C1=CC(N(C)C)=CC2=[S+]C3=CC(N(C)C)=CC=C3N=C21 CXKWCBBOMKCUKX-UHFFFAOYSA-M 0.000 description 1
- 229960000907 methylthioninium chloride Drugs 0.000 description 1
- 229910017604 nitric acid Inorganic materials 0.000 description 1
- 150000002826 nitrites Chemical class 0.000 description 1
- 150000002894 organic compounds Chemical class 0.000 description 1
- 235000010333 potassium nitrate Nutrition 0.000 description 1
- 239000004323 potassium nitrate Substances 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- 239000011667 zinc carbonate Substances 0.000 description 1
- 229910000010 zinc carbonate Inorganic materials 0.000 description 1
- 235000004416 zinc carbonate Nutrition 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
- C23C22/07—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
- C23C22/10—Orthophosphates containing oxidants
Definitions
- This invention has for its object to produce phosphate coatings on metals and more particularly to reduce the time within which a coating of a given thickness and composition may be produced upon a metal. More particularly the invention relates to the reduction in time necessary for producing a rust proof phosphate coating on surfaces of iron or steel. The details of the invention will appear as the description proceeds.
- phosphate baths have been used to produce phosphate coatings on metal surfaces.
- a dilute bath is used in which the acid or acid phosphates attack the surface of the metal and form thereon integral phosphate coatings which are relatively insoluble.
- Such coatings will not be formed until the bath is within certain limits as to acidity and phosphates therein, etc., the proportions of the various ingredients varying considerably with different phosphates and with other modifying conditions, but being generally described by the term balance.
- a phosphate bath will produce a coating upon a metal surface it is in balance so far as that metal is concerned. Otherwise, it is not in balance.
- the operation of the balanced solution comprises reaction of the acid or phosphate in the solution with the surface of the metal and the production on the surface of the metal of relatively insoluble phosphates which are substantially integral with the surface.
- This action on the metal results in the release of hydrogen.
- the present invention broadly speaking, consists in removing this hydrogen as it is released so that it does not form a hydrogen blanket on the surface of the metal. This removal of the hydrogen as it is released results in a material lessening of the time required for the production of a coating on metal, other conditions remain- 'ing the same.
- oxidizing agents including air, hydrogen peroxid, common manganates, permanganates, chromates and dischromates, and quinone, for example, act upon the ferrous phosphate in the bath and precipitate insoluble phosphates while releasing some free phosphoric acid.
- the result of the increased acidity of the bath is to increase the attack of the bath on the metal and increase, rather than decrease, the resultant bubbling and hydrogen blanket. Because of this, and of the disturbance in the balance of the bath, the use of such oxidizing agents in a bath containing ferrous phosphates tends to increase rather than decrease the processing time.
- Manganese dioxide and hydrated manganic oxide act on ferrous iron in a rust proofing bath, but they also introduce manganese into the bath, which unites with some of the free phosphoric acid and forms manganese dihydrogen phosphate, a valuable constituent in a rust proofing bath. For this reason, these two oxidizing agents have some value, and manganese dioxide has been used commercially, but when introduced into a bath containing ferrous phosphate they do not reduce the hydrogen blanket and so are not useful for the purposes of the present invention.
- oxidizing agents which do not affect the ferrous iron, but which will react promptly with the hydrogen and so effectively reduce the hydrogen blanket.
- oxidizing agents are the nitrates, nitrites and sulphites.
- a wide variety of these salts may be used, but in their use metals which will produce a harmful effect in the bath must be avoided.
- the salts of metals not lower than iron in the electromotive series should be used in treating iron for a satisfactory rust proofing coat, and the salts of alkali metal and alkali earth metals have been found to be most desirable.
- sodium nitrate is readily available and has proved very satisfactory. Some nitrate present as an impurity in commercial sodium nitrate does not injure the result and seems to somewhat'accelerate the action.
- Nitric acid may be introduced in small quantities as such, and has apparently an oxidizing efi'ect similar to that of the nitrates, but it increases the acidity of the bath and, therefore, tends to throw the bath out of balance. For that reason the salts are preferable to the acid.
- Uranyl acetate belongs to a class of oxidizing agents which have some effect upon ferrous men, but react therewith much more slowly than with the hydrogen, so that their reactlon in the bath is principally with the hydrogen and, while not as effective expediting agents for baths containing ferrous phosphate as oxidizing agents of the class previously referred to which do not affect the ferrous iron, they nevertheless do have some expediting effect in the bath since they tend to decrease rather than increase the hydrogen blanket.
- Other examples of such oxidizing agents are the common chlorates, bromates and iodates, and such organic compounds as methylene blue.
- the invention is particularly directed to producing relatively rust proof coatings upon surfaces of iron or steel within relatively short periods of time, but in its broader aspects the invention is also applicable to the production of phosphate coatings upon zinc, and also may be utilized to decrease the processing time in the production of phosphate coatings on iron or steel surfaces where copper is employed also as an expediting agent.
- One definite example of the application of this invention will be stated specifically, but with the foregoing explanation it will be understood that this specific statement is merely by way of example and that wide departures may be made therefrom within the principals set forth herein, and within the scope of the appended claims.
- the phosphate bath at present most widely used for producing rust proof coatings u on iron or steel surfaces is produced and rep enished by the use of dihydrogen phosphate powder produced in accordance with the patent of Green, Jones and Willard, No. 1,651,694 issued December 6, 1927 and a patent of Willard and Green No. 1,660,661 issued February 28, 1928.
- the action of a bath of this kind can be expedited so that reaction will be completed within from three to fourteen minutes, depending upon the character of the surface being processed and other variations, by the addition to the bath of about one half ounce of commercial sodium nitrate to one gallon of the bath.
- the expediting efl'ect of the sodium nitrate may be realized to a greater or less extent with wide variation of amounts used, but that specified has been found to be a desirable roportion.
- the bath may be maintaine b adding ei ht pounds of sodium nitrate to eac two hun red forty two pounds of the phos phate powder used in replenishing the bath.
- the coating resulting from a bath to which sodium nitrate has been added is not perceptibly changed in composition by this addition, and its rust proofing effect is not materially altered.
- the beneficial effect is the cutting down of the processin time to a small fraction of that required y a similar bath without the addition of the oxidizing agent.
- the expediting effect of the oxidizing agent makes it practicable to employ the bath at a temperature lower than boiling, and this reduced temperature lessens the danger of coarse crystallization on the metal, known as sparkle, and this is another advantage of the invention in cases where sparkle is found to be troublesome.
- a material for replenishing a coating bath comprising water-soluble dihydrogen phosphate as the major portion of its coating chemicals and comprising also an oxidizing agent having an oxidation potential not greater than the potential of the common bromates in a dilute phosphate solution.
- a material for rust-proofing comprising powdered or granular dihydrogen phosphates and a nitrate of a metal as high as iron in the electromotive series, the phosphate constituting the major ingredient.
- a material for rust-proofing comprising powdered or granular dihydrogen phosphate and sodium nitrate in the proportion approximately of 242 pounds of the phosphate and 8 pounds of nitrate.
- a material for replenishing a phosphate bath comprising powdered or granular dihydrogen phosphate of a metal from zinc to iron in the, electromotive series, sodium nitrate, and calcium carbonate coating the particles of nitrate, the phosphate being the 7 major ingredient.
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)
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US549312A US1911726A (en) | 1931-07-07 | 1931-07-07 | Production of phosphate coatings on metals |
| FR724422D FR724422A (fr) | 1931-07-07 | 1931-10-07 | Procédé pour constituer des revêtements de phosphate sur les métaux |
| BE383250D BE383250A (enrdf_load_stackoverflow) | 1931-07-07 | 1931-10-08 | |
| GB30357/31A GB386739A (en) | 1931-07-07 | 1931-11-02 | Production of phosphate coatings on metals |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US549312A US1911726A (en) | 1931-07-07 | 1931-07-07 | Production of phosphate coatings on metals |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US1911726A true US1911726A (en) | 1933-05-30 |
Family
ID=24192476
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US549312A Expired - Lifetime US1911726A (en) | 1931-07-07 | 1931-07-07 | Production of phosphate coatings on metals |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US1911726A (enrdf_load_stackoverflow) |
| BE (1) | BE383250A (enrdf_load_stackoverflow) |
| FR (1) | FR724422A (enrdf_load_stackoverflow) |
| GB (1) | GB386739A (enrdf_load_stackoverflow) |
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2434237A (en) * | 1943-09-13 | 1948-01-06 | Sk Wellman Co | Apparatus for applying powdered metal briquets to curved metallic surfaces |
| US2434525A (en) * | 1943-08-23 | 1948-01-13 | Rheem Mfg Co | Coating on metals |
| US2465750A (en) * | 1944-05-23 | 1949-03-29 | Reid Engineering Company | Composition for preparing aluminum and the like for welding |
| US2487137A (en) * | 1947-09-10 | 1949-11-08 | Armco Steel Corp | Producing coatings on metal |
| US2591479A (en) * | 1947-05-12 | 1952-04-01 | Parker Rust Proof Co | Method of and solution for coating surfaces chiefly of zinc |
| US2743204A (en) * | 1952-08-28 | 1956-04-24 | Parker Rust Proof Co | Phosphate metal coatings |
| US2923608A (en) * | 1956-04-13 | 1960-02-02 | Fmc Corp | Method of improving the bonding properties of steel surfaces |
| DE974004C (de) * | 1937-06-02 | 1960-08-18 | Metallgesellschaft Ag | Verfahren zur Verbesserung der spanlosen Verformung von Werkstuecken aus Eisen und Zink |
| US3141797A (en) * | 1961-09-07 | 1964-07-21 | Lubrizol Corp | Phosphating process |
| US3178320A (en) * | 1960-07-29 | 1965-04-13 | John A Henricks | Method and composition for the formation of smooth zinc phosphate coatings on steel |
| US3425854A (en) * | 1966-05-02 | 1969-02-04 | Kern C Borden | Metal conditioning bath comprising sodium hydroxide,nitric acid,and gum arabic |
| US4330345A (en) * | 1980-12-08 | 1982-05-18 | Chemfil Corporation | Phosphate coating process and composition |
| CN105177548A (zh) * | 2015-10-26 | 2015-12-23 | 东莞市圣龙特电子科技有限公司 | 一种铜粉的表面磷化处理工艺 |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE746470C (de) * | 1935-02-18 | 1944-07-21 | Metallgesellschaft Ag | Verfahren zur Auffrischung zinkphosphathaltiger Rostschutzbaeder |
| DE966914C (de) * | 1936-05-01 | 1957-09-19 | Metallgesellschaft Ag | Verfahren zur Bildung von Phosphatueberzuegen |
| DE910373C (de) * | 1941-05-26 | 1954-05-03 | Parker Rust Proof Company | Verfahren zur Herstellung eines korrosionsbestaendigen UEberzuges auf Eisen oder Zink |
| DE971252C (de) * | 1954-12-24 | 1958-12-31 | Siemens Ag | Isolationshuelse fuer in Nuten gebettete Kaefigwicklungen |
| FR2519028A1 (fr) * | 1981-12-30 | 1983-07-01 | Asturienne Mines Comp Royale | Procede d'elaboration d'un revetement noir a la surface de pieces dont au moins une face est en zinc |
| ES2178917B1 (es) * | 2000-04-05 | 2004-03-16 | Fundacion Inasmet | Tratamiento de conversion quimica para el magnesio y sus aleaciones. |
-
1931
- 1931-07-07 US US549312A patent/US1911726A/en not_active Expired - Lifetime
- 1931-10-07 FR FR724422D patent/FR724422A/fr not_active Expired
- 1931-10-08 BE BE383250D patent/BE383250A/xx unknown
- 1931-11-02 GB GB30357/31A patent/GB386739A/en not_active Expired
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE974004C (de) * | 1937-06-02 | 1960-08-18 | Metallgesellschaft Ag | Verfahren zur Verbesserung der spanlosen Verformung von Werkstuecken aus Eisen und Zink |
| US2434525A (en) * | 1943-08-23 | 1948-01-13 | Rheem Mfg Co | Coating on metals |
| US2434237A (en) * | 1943-09-13 | 1948-01-06 | Sk Wellman Co | Apparatus for applying powdered metal briquets to curved metallic surfaces |
| US2465750A (en) * | 1944-05-23 | 1949-03-29 | Reid Engineering Company | Composition for preparing aluminum and the like for welding |
| US2591479A (en) * | 1947-05-12 | 1952-04-01 | Parker Rust Proof Co | Method of and solution for coating surfaces chiefly of zinc |
| US2487137A (en) * | 1947-09-10 | 1949-11-08 | Armco Steel Corp | Producing coatings on metal |
| US2743204A (en) * | 1952-08-28 | 1956-04-24 | Parker Rust Proof Co | Phosphate metal coatings |
| US2923608A (en) * | 1956-04-13 | 1960-02-02 | Fmc Corp | Method of improving the bonding properties of steel surfaces |
| US3178320A (en) * | 1960-07-29 | 1965-04-13 | John A Henricks | Method and composition for the formation of smooth zinc phosphate coatings on steel |
| US3141797A (en) * | 1961-09-07 | 1964-07-21 | Lubrizol Corp | Phosphating process |
| US3425854A (en) * | 1966-05-02 | 1969-02-04 | Kern C Borden | Metal conditioning bath comprising sodium hydroxide,nitric acid,and gum arabic |
| US4330345A (en) * | 1980-12-08 | 1982-05-18 | Chemfil Corporation | Phosphate coating process and composition |
| CN105177548A (zh) * | 2015-10-26 | 2015-12-23 | 东莞市圣龙特电子科技有限公司 | 一种铜粉的表面磷化处理工艺 |
Also Published As
| Publication number | Publication date |
|---|---|
| FR724422A (fr) | 1932-04-27 |
| BE383250A (enrdf_load_stackoverflow) | 1931-11-30 |
| GB386739A (en) | 1933-01-26 |
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