US3043758A - Process of electrolytically pickling alloy steels - Google Patents
Process of electrolytically pickling alloy steels Download PDFInfo
- Publication number
- US3043758A US3043758A US828039A US82803959A US3043758A US 3043758 A US3043758 A US 3043758A US 828039 A US828039 A US 828039A US 82803959 A US82803959 A US 82803959A US 3043758 A US3043758 A US 3043758A
- Authority
- US
- United States
- Prior art keywords
- acid
- electrolyte
- pickling
- article
- anode
- 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 description 36
- 230000008569 process Effects 0.000 title claims description 36
- 238000005554 pickling Methods 0.000 title claims description 16
- 229910000831 Steel Inorganic materials 0.000 title description 6
- 239000010959 steel Substances 0.000 title description 6
- 229910045601 alloy Inorganic materials 0.000 title description 3
- 239000000956 alloy Substances 0.000 title description 3
- 239000002253 acid Substances 0.000 claims description 26
- KRHYYFGTRYWZRS-UHFFFAOYSA-N Fluorane Chemical compound F KRHYYFGTRYWZRS-UHFFFAOYSA-N 0.000 claims description 13
- 239000003792 electrolyte Substances 0.000 claims description 12
- 229910052500 inorganic mineral Inorganic materials 0.000 claims description 11
- 239000011707 mineral Substances 0.000 claims description 11
- 230000007935 neutral effect Effects 0.000 claims description 10
- 150000003839 salts Chemical class 0.000 claims description 8
- 239000007864 aqueous solution Substances 0.000 claims description 7
- 150000007513 acids Chemical class 0.000 claims description 6
- -1 AMMONIUM Chemical class 0.000 claims description 5
- 230000009471 action Effects 0.000 claims description 5
- QGZKDVFQNNGYKY-UHFFFAOYSA-O Ammonium Chemical compound [NH4+] QGZKDVFQNNGYKY-UHFFFAOYSA-O 0.000 claims description 4
- 229910052783 alkali metal Inorganic materials 0.000 claims description 4
- 239000000203 mixture Substances 0.000 claims description 4
- 239000000243 solution Substances 0.000 claims description 4
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 claims description 3
- 229910002651 NO3 Inorganic materials 0.000 claims description 3
- NHNBFGGVMKEFGY-UHFFFAOYSA-N Nitrate Chemical compound [O-][N+]([O-])=O NHNBFGGVMKEFGY-UHFFFAOYSA-N 0.000 claims description 3
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 claims description 3
- 150000001340 alkali metals Chemical class 0.000 claims description 2
- 238000007598 dipping method Methods 0.000 claims description 2
- 239000010935 stainless steel Substances 0.000 claims description 2
- 229910001220 stainless steel Inorganic materials 0.000 claims description 2
- 238000011282 treatment Methods 0.000 description 17
- 235000002639 sodium chloride Nutrition 0.000 description 11
- 235000010755 mineral Nutrition 0.000 description 10
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 description 9
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 9
- CSNNHWWHGAXBCP-UHFFFAOYSA-L Magnesium sulfate Chemical class [Mg+2].[O-][S+2]([O-])([O-])[O-] CSNNHWWHGAXBCP-UHFFFAOYSA-L 0.000 description 8
- 229910017604 nitric acid Inorganic materials 0.000 description 8
- 238000006243 chemical reaction Methods 0.000 description 6
- PUZPDOWCWNUUKD-UHFFFAOYSA-M sodium fluoride Chemical compound [F-].[Na+] PUZPDOWCWNUUKD-UHFFFAOYSA-M 0.000 description 6
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 5
- 239000003513 alkali Substances 0.000 description 5
- 230000015572 biosynthetic process Effects 0.000 description 5
- JRKICGRDRMAZLK-UHFFFAOYSA-L peroxydisulfate Chemical compound [O-]S(=O)(=O)OOS([O-])(=O)=O JRKICGRDRMAZLK-UHFFFAOYSA-L 0.000 description 5
- 239000004020 conductor Substances 0.000 description 4
- 235000019341 magnesium sulphate Nutrition 0.000 description 4
- 229910052751 metal Inorganic materials 0.000 description 4
- 239000002184 metal Substances 0.000 description 4
- VWDWKYIASSYTQR-UHFFFAOYSA-N sodium nitrate Chemical compound [Na+].[O-][N+]([O-])=O VWDWKYIASSYTQR-UHFFFAOYSA-N 0.000 description 4
- PMZURENOXWZQFD-UHFFFAOYSA-L Sodium Sulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=O PMZURENOXWZQFD-UHFFFAOYSA-L 0.000 description 3
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 3
- 230000008901 benefit Effects 0.000 description 3
- 150000001805 chlorine compounds Chemical class 0.000 description 3
- 150000001875 compounds Chemical class 0.000 description 3
- 235000011167 hydrochloric acid Nutrition 0.000 description 3
- 238000007654 immersion Methods 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 230000007246 mechanism Effects 0.000 description 3
- VLTRZXGMWDSKGL-UHFFFAOYSA-N perchloric acid Chemical class OCl(=O)(=O)=O VLTRZXGMWDSKGL-UHFFFAOYSA-N 0.000 description 3
- 150000004968 peroxymonosulfuric acids Chemical class 0.000 description 3
- 239000011775 sodium fluoride Substances 0.000 description 3
- 235000013024 sodium fluoride Nutrition 0.000 description 3
- 229910052938 sodium sulfate Inorganic materials 0.000 description 3
- 235000011152 sodium sulphate Nutrition 0.000 description 3
- 229910000851 Alloy steel Inorganic materials 0.000 description 2
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 2
- NLXLAEXVIDQMFP-UHFFFAOYSA-N Ammonia chloride Chemical compound [NH4+].[Cl-] NLXLAEXVIDQMFP-UHFFFAOYSA-N 0.000 description 2
- IOVCWXUNBOPUCH-UHFFFAOYSA-M Nitrite anion Chemical compound [O-]N=O IOVCWXUNBOPUCH-UHFFFAOYSA-M 0.000 description 2
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 2
- LSNNMFCWUKXFEE-UHFFFAOYSA-N Sulfurous acid Chemical compound OS(O)=O LSNNMFCWUKXFEE-UHFFFAOYSA-N 0.000 description 2
- BFNBIHQBYMNNAN-UHFFFAOYSA-N ammonium sulfate Chemical compound N.N.OS(O)(=O)=O BFNBIHQBYMNNAN-UHFFFAOYSA-N 0.000 description 2
- 229910052921 ammonium sulfate Inorganic materials 0.000 description 2
- 235000011130 ammonium sulphate Nutrition 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- ZCDOYSPFYFSLEW-UHFFFAOYSA-N chromate(2-) Chemical class [O-][Cr]([O-])(=O)=O ZCDOYSPFYFSLEW-UHFFFAOYSA-N 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 238000005868 electrolysis reaction Methods 0.000 description 2
- 150000002222 fluorine compounds Chemical class 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- NCNCGGDMXMBVIA-UHFFFAOYSA-L iron(ii) hydroxide Chemical compound [OH-].[OH-].[Fe+2] NCNCGGDMXMBVIA-UHFFFAOYSA-L 0.000 description 2
- 239000011780 sodium chloride Substances 0.000 description 2
- 235000010344 sodium nitrate Nutrition 0.000 description 2
- 239000004317 sodium nitrate Substances 0.000 description 2
- LSNNMFCWUKXFEE-UHFFFAOYSA-M Bisulfite Chemical compound OS([O-])=O LSNNMFCWUKXFEE-UHFFFAOYSA-M 0.000 description 1
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 description 1
- 241001122767 Theaceae Species 0.000 description 1
- 230000001464 adherent effect Effects 0.000 description 1
- 229910001515 alkali metal fluoride Inorganic materials 0.000 description 1
- 150000001447 alkali salts Chemical class 0.000 description 1
- 238000005275 alloying Methods 0.000 description 1
- 229910021529 ammonia Inorganic materials 0.000 description 1
- 235000019270 ammonium chloride Nutrition 0.000 description 1
- 150000003863 ammonium salts Chemical class 0.000 description 1
- 238000005282 brightening Methods 0.000 description 1
- 239000003638 chemical reducing agent Substances 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 229960004887 ferric hydroxide Drugs 0.000 description 1
- QAOWNCQODCNURD-UHFFFAOYSA-M hydrogensulfate Chemical compound OS([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-M 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-M hydroxide Chemical compound [OH-] XLYOFNOQVPJJNP-UHFFFAOYSA-M 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- 235000014413 iron hydroxide Nutrition 0.000 description 1
- IEECXTSVVFWGSE-UHFFFAOYSA-M iron(3+);oxygen(2-);hydroxide Chemical compound [OH-].[O-2].[Fe+3] IEECXTSVVFWGSE-UHFFFAOYSA-M 0.000 description 1
- 229910021506 iron(II) hydroxide Inorganic materials 0.000 description 1
- 229910052943 magnesium sulfate Inorganic materials 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 150000002823 nitrates Chemical class 0.000 description 1
- 150000002826 nitrites Chemical class 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- VLTRZXGMWDSKGL-UHFFFAOYSA-M perchlorate Inorganic materials [O-]Cl(=O)(=O)=O VLTRZXGMWDSKGL-UHFFFAOYSA-M 0.000 description 1
- 235000021110 pickles Nutrition 0.000 description 1
- 229910052700 potassium Inorganic materials 0.000 description 1
- 239000011591 potassium Substances 0.000 description 1
- OTYBMLCTZGSZBG-UHFFFAOYSA-L potassium sulfate Chemical compound [K+].[K+].[O-]S([O-])(=O)=O OTYBMLCTZGSZBG-UHFFFAOYSA-L 0.000 description 1
- 229910052939 potassium sulfate Inorganic materials 0.000 description 1
- 235000011151 potassium sulphates Nutrition 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- LSNNMFCWUKXFEE-UHFFFAOYSA-L sulfite Chemical class [O-]S([O-])=O LSNNMFCWUKXFEE-UHFFFAOYSA-L 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25F—PROCESSES FOR THE ELECTROLYTIC REMOVAL OF MATERIALS FROM OBJECTS; APPARATUS THEREFOR
- C25F1/00—Electrolytic cleaning, degreasing, pickling or descaling
- C25F1/02—Pickling; Descaling
- C25F1/04—Pickling; Descaling in solution
- C25F1/06—Iron or steel
-
- 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
- C23G—CLEANING OR DE-GREASING OF METALLIC MATERIAL BY CHEMICAL METHODS OTHER THAN ELECTROLYSIS
- C23G1/00—Cleaning or pickling metallic material with solutions or molten salts
- C23G1/02—Cleaning or pickling metallic material with solutions or molten salts with acid solutions
- C23G1/08—Iron or steel
Definitions
- the present invention relates to the cleaning of metallic surfaces, particularly to the removal of scale and deposits from the surface of alloy steels by an electrolytic pickling treatment.
- the baths in which the workpieces are electrolytically treated consist of mineral acids such as sulfuric acid, hydrochloric acid, nitric acid, or of Small amounts of hydrofluoric acid may be added to the bath.
- the workpieces are alternatingly arranged as a cathode and as an anode in the electrolyte in which they are pickled and descaled.
- the electrolytic treatment is followed by an immersion treatment of the workpieces in nitric acid, or nitric acid and hydrofluoric acid, in order to brighten the electrolytically treated metal surfaces.
- the present invention relates to a process of the type described, in which the articles to be pickled are arranged as an anode or as an intermediate conductor in electrolytic baths which consist essentially of aqueous solutions of at least one neutral salt of the alkalies, including ammonium, and of mineral salts, e.g., sulfuric, nitric and hydrochloric acids, particularly of aqueous solutions of neutral sodium sulfate or sodium nitrate, the pH of the electrolyte being permanently maintained preferably between 1.0 and 7.0, and in which the oxides which represent the scale to be removed, which have been loosened up or only chemically changed by such electrolytic treatment, are completely detached from the metallic surface by a short immersion treatment in a mineral acid such as sulfuric acid, nitric acid or a mixatent G 3,M3,?53 Patented July It), 1952 ice 2 ture of nitric acid and hydrofluoric acid following the electrolytic treatment.
- electrolytic baths consist essentially of aqueous solutions
- the presumable reaction mechanism will be explained hereinafter with reference to an example of carrying out the electrolytic pickling process of the invention using an aqueous solution of neutral sodium sulfate as an electrolyte.
- Electrolyte Aqueous solution of Na SO Process at the anode: Formation of H Fe (and the alloying constituents of the steel such as Ni, Cr) is transformed into the sulfate.
- Free Na is formed first, which forms Na-OI-I with the H 0 present.
- the process according to the invention has an additional advantage over the known processes.
- the percompounds formed have a strong oxidizing activity. For this reason they passivate the steel articles treated and protect them from overpickling. As a result the steel itself is not attacked and the above-described advantage residing in the formation of satisfactory, almost glossy surfaces is obtained.
- the persulfate-forming reaction represented by the formula in Table l is an equilibrium reaction. For this reason care must be taken that the reaction does not only proceed from left to right, to form persu'lfate, because in this case the electrolyte would assume an undesired alkalinity owing to the increasing production of NaOH. This can be avoided by carrying out the electrolysis at elevated temperatures in a range in which a decomposition of the persulfate in the sense of the reverse reaction can be expected with certainty so that the required pH- range of 1.0-7.0 is maintained also in continuous operation.
- chlorides perchlorates, chromates, nitrites, sulfites, and nitrates.
- the pH-value to be maintained according to the invention can be controlled, if desired, by an addition of small amounts of an acid, alkali or ammonium salt of a mineral acid, .e.g., a bisulfate, or by an addition of small amounts of a free mineral acid.
- Example 1 Using 200 grams technically pure Epsom salts (magnesium sulfate) per liter, pH 7.0, a satisfactory pickling of a ferritic material was obtained within ten seconds by an anodic treatment at 76 C. and 6.0 amperes per square decimeter. A 25-second dip in 10% nitric acid at 40 C. was employed for brightening and passivating.
- Epsom salts magnesium sulfate
- Example 2 Using 165 grams technically pure Epsom salts per liter, pH 3.0, cathodic and anodic treatments at 25 seconds each at 85 C. and 9 amperes per square decimeter of austenitic strip material continuously fed as an intermediate conductor gave a loosely adherent scale, which had been entirely changed chemically and the major part of which was removed in the washing brush machine whereas the residue was easily detached in a usual mixed acid consisting of nitric acid and hydrofluoric acid.
- the surface of the strip was not only entirely free of scale and clean White but showed a fine silky gloss, which cannot be obtained by any chemical or electrolytic acid pickle
- Example 3 The same result was obtained on austenitic and ferritic materials when the Epsom salts were replaced by an equivalent amount of ammonium sulfate or potassium sulfate in processes analogous tosExample 1 or 2.
- Example 4 Using 200 grams Epsom salts-F10 grams sodium fluoride, pH 3.0-7.0, cathodic and anodic treatments of 45 seconds each, at 90 C. and 10 amperes per square decimeter, of austenitic hot strip arranged as an intermediate conductor, caused the scale oxides to be sufficiently loosened up and to be chemically changed so that they dissolved spontaneously in the usual mixed acid. The surface was absolutely satisfactory microscopically and macroscopically.
- Example 5 Using 250 grams common salt per liter at 90 C., alloy steels were satisfactorily pickled by a cathodic treatment of -40 seconds and an anodic treatment of 1060 seconds at current densities of 3-10 amperes, depending on the degree of scaling. A subsequent immersion in HNO or mixed acid brightens the treated surfaces.
- the chlorides of ammonium and potassium act like common salt.
- the precipitated iron hydroxide is green ferrous hydroxide.
- Example 6 Using 200 grants ammonium chloride and 200 grams ammonium sulfate per liter, pH 3.0, the pickling is carried out as in Example 5 with the difference that brown ferric hydroxide is obtained. To avoid ammonia losses it is suitable to maintain the electrolyte at a weakly acid reaction between pH 1.0 and 4.0. This can be accomplished simply by a continual dropwise addition of sulfuric acid during the pickling operation.
- Process for electrolytically pickling a stainless steel article which comprises the steps of subjecting said article as the anode to the action of a direct electric current in an electrolyte consisting essentially of an aqueous solution of at least one neutral salt selected from the group consisting of the chloride, sulfate and nitrate of an alkali metal including ammonium, at a current density between about 6 and about 10 amperes per square decimeter for a period of about 10 to seconds, the pH of said electrolyte being maintained between 1.0 and 7.0, and then dipping said article in a solution of a mineral acid selected from the group consisting of sulfuric, nitric, and hydrofluoric acid, and mixtures of nitric and hydrofluoric acids.
- an electrolyte consisting essentially of an aqueous solution of at least one neutral salt selected from the group consisting of the chloride, sulfate and nitrate of an alkali metal including ammonium, at a current density between about 6 and about
- the bath additionally contains from about 0.1 to about 50 grams per liter of a compound selected from the group consisting of an alkali metalfluoride, chloride, perchlorate, chromate, nitrite, sulfite and nitrate.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AT860709X | 1958-12-23 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US3043758A true US3043758A (en) | 1962-07-10 |
Family
ID=3682345
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US828039A Expired - Lifetime US3043758A (en) | 1958-12-23 | 1959-07-20 | Process of electrolytically pickling alloy steels |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US3043758A (de) |
| DE (1) | DE1161740B (de) |
| FR (1) | FR1226856A (de) |
| GB (1) | GB860709A (de) |
Cited By (25)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3304246A (en) * | 1963-12-26 | 1967-02-14 | Mitsubishi Heavy Ind Ltd | Method of electrolytically descaling steel including selective recovery of dissolved scale products |
| US3429792A (en) * | 1965-07-30 | 1969-02-25 | Mitsubishi Heavy Ind Ltd | Method of electrolytically descaling and pickling steel |
| US3627653A (en) * | 1970-01-16 | 1971-12-14 | B R H Ind | Method for cleaning metal and metal parts to remove corrosion therefrom |
| US3666667A (en) * | 1969-04-14 | 1972-05-30 | Enthone | Alkaline cyanide-free aqueous descaling composition containing elemental sulfur |
| US4012299A (en) * | 1976-04-01 | 1977-03-15 | Allegheny Ludlum Industries, Inc. | Metallic descaling system |
| US4026777A (en) * | 1976-04-01 | 1977-05-31 | Allegheny Ludlum Industries, Inc. | Metallic descaling system |
| DE2714136A1 (de) * | 1976-04-01 | 1977-10-20 | Allegheny Ludlum Ind Inc | Verfahren zur entzunderung eines metallkoerpers |
| US4066521A (en) * | 1977-02-09 | 1978-01-03 | Allegheny Ludlum Industries, Inc. | Metallic descaling system |
| US4123337A (en) * | 1977-11-02 | 1978-10-31 | Armco Steel Corporation | Method of improving the surface insulation resistance of electrical steels having an insulative coating thereon |
| US4129485A (en) * | 1976-10-12 | 1978-12-12 | Agency Of Industrial Science & Technology | Method for electrolytic removal of scale from band steel |
| DE2937992A1 (de) * | 1978-09-21 | 1980-04-17 | Sumitomo Metal Ind | Verfahren und vorrichtung zum kontinuierlichen elektrolytischen entzundern von stahldraht durch kontaktfreien stromfluss |
| US4276133A (en) * | 1978-09-21 | 1981-06-30 | Sumitomo Industries, Ltd. | Method for continuous electrolytic descaling of steel wire by non-contact current flow |
| US4363709A (en) * | 1981-02-27 | 1982-12-14 | Allegheny Ludlum Steel Corporation | High current density, acid-free electrolytic descaling process |
| US4391685A (en) * | 1981-02-26 | 1983-07-05 | Republic Steel Corporation | Process for electrolytically pickling steel strip material |
| US4415415A (en) * | 1982-11-24 | 1983-11-15 | Allegheny Ludlum Steel Corporation | Method of controlling oxide scale formation and descaling thereof from metal articles |
| US4450058A (en) * | 1983-07-29 | 1984-05-22 | Allegheny Ludlum Steel Corporation | Method for producing bright stainless steel |
| AT402737B (de) * | 1992-04-29 | 1997-08-25 | Andritz Patentverwaltung | Verfahren zum diskontinuierlichen beizen von metallischen platten, insbesondere aus edelstahl |
| US6398876B1 (en) * | 1998-12-22 | 2002-06-04 | Andritz—Patentverwaltungs-Gesellschaft m.b.H. | Process for pickling steel |
| US20050161440A1 (en) * | 1993-12-20 | 2005-07-28 | Astrazeneca | Metallic implant and process for treating a metallic implant |
| US20050234558A1 (en) * | 2002-07-19 | 2005-10-20 | Ingela Petersson | Implant and a method for treating an implant surface |
| US20060154206A1 (en) * | 2002-07-19 | 2006-07-13 | Ingela Petersson | Implant and a method for treating an implant surface |
| CN102677140A (zh) * | 2012-05-04 | 2012-09-19 | 大连理工大学 | 一种不锈钢铸件的表面清洗工艺 |
| US20130074871A1 (en) * | 2011-09-26 | 2013-03-28 | Ak Steel Properties, Inc. | Stainless steel pickling in an oxidizing, electrolytic acid bath |
| US20170226604A1 (en) * | 2014-08-18 | 2017-08-10 | Iva Schmetz Gmbh | Method for producing a retort for a nitriding furnace and retort |
| CN113788520A (zh) * | 2021-10-08 | 2021-12-14 | 北京首钢吉泰安新材料有限公司 | 一种铁铬铝酸洗的工艺及废水处理方法和废水处理装置 |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE69718589T2 (de) * | 1996-04-29 | 2003-11-20 | Ki Won Lee | Beizlösung für die Entzunderung von Legierungen auf Eisenbasis |
Citations (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB191203374A (en) * | 1912-02-10 | 1912-07-11 | Charles Herbert Thompson | Improvements in and relating to Cleaning Metallic Surfaces. |
| US1098338A (en) * | 1913-05-20 | 1914-05-26 | Charles Herbert Thompson | Cleaning metal surfaces. |
| US1542451A (en) * | 1925-01-19 | 1925-06-16 | United Alloy Steel Corp | Pickling steel sheets |
| US1657228A (en) * | 1926-06-02 | 1928-01-24 | Allegheny Steel Co | Method of picking chromium-iron alloys |
| US1859734A (en) * | 1928-12-21 | 1932-05-24 | Electro Metallurg Co | Method of removing oxide coatings from metals |
| US1899734A (en) * | 1930-01-18 | 1933-02-28 | American Sheet & Tin Plate | Removal of oxids from ferrous metal |
| US2244423A (en) * | 1938-06-28 | 1941-06-03 | Hanson Van Winkle Munning Co | Apparatus for strip plating |
| US2327676A (en) * | 1940-01-09 | 1943-08-24 | Repel Corp Du | Plating process |
| US2337062A (en) * | 1942-04-07 | 1943-12-21 | Solar Aircraft Co | Pickling solution and method |
| US2347742A (en) * | 1939-09-18 | 1944-05-02 | Rustless Iron & Steel Corp | Pickling process |
| GB576698A (en) * | 1944-04-01 | 1946-04-16 | Rylands Brothers Ltd | Improvements in or relating to the electro-chemical surface cleaning of metal articles |
| US2615840A (en) * | 1947-06-06 | 1952-10-28 | Chapman Alfred Arthur Grahame | Electrolytic method to remove rust |
| US2893544A (en) * | 1953-11-12 | 1959-07-07 | Kenneth F Russell | Apparatus for drawing wire |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| BE438799A (de) * | 1939-05-24 |
-
1959
- 1959-06-05 FR FR796747A patent/FR1226856A/fr not_active Expired
- 1959-06-16 DE DER25746A patent/DE1161740B/de active Pending
- 1959-06-26 GB GB21990/59A patent/GB860709A/en not_active Expired
- 1959-07-20 US US828039A patent/US3043758A/en not_active Expired - Lifetime
Patent Citations (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB191203374A (en) * | 1912-02-10 | 1912-07-11 | Charles Herbert Thompson | Improvements in and relating to Cleaning Metallic Surfaces. |
| US1098338A (en) * | 1913-05-20 | 1914-05-26 | Charles Herbert Thompson | Cleaning metal surfaces. |
| US1542451A (en) * | 1925-01-19 | 1925-06-16 | United Alloy Steel Corp | Pickling steel sheets |
| US1657228A (en) * | 1926-06-02 | 1928-01-24 | Allegheny Steel Co | Method of picking chromium-iron alloys |
| US1859734A (en) * | 1928-12-21 | 1932-05-24 | Electro Metallurg Co | Method of removing oxide coatings from metals |
| US1899734A (en) * | 1930-01-18 | 1933-02-28 | American Sheet & Tin Plate | Removal of oxids from ferrous metal |
| US2244423A (en) * | 1938-06-28 | 1941-06-03 | Hanson Van Winkle Munning Co | Apparatus for strip plating |
| US2347742A (en) * | 1939-09-18 | 1944-05-02 | Rustless Iron & Steel Corp | Pickling process |
| US2327676A (en) * | 1940-01-09 | 1943-08-24 | Repel Corp Du | Plating process |
| US2337062A (en) * | 1942-04-07 | 1943-12-21 | Solar Aircraft Co | Pickling solution and method |
| GB576698A (en) * | 1944-04-01 | 1946-04-16 | Rylands Brothers Ltd | Improvements in or relating to the electro-chemical surface cleaning of metal articles |
| US2615840A (en) * | 1947-06-06 | 1952-10-28 | Chapman Alfred Arthur Grahame | Electrolytic method to remove rust |
| US2893544A (en) * | 1953-11-12 | 1959-07-07 | Kenneth F Russell | Apparatus for drawing wire |
Cited By (33)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3304246A (en) * | 1963-12-26 | 1967-02-14 | Mitsubishi Heavy Ind Ltd | Method of electrolytically descaling steel including selective recovery of dissolved scale products |
| US3429792A (en) * | 1965-07-30 | 1969-02-25 | Mitsubishi Heavy Ind Ltd | Method of electrolytically descaling and pickling steel |
| US3666667A (en) * | 1969-04-14 | 1972-05-30 | Enthone | Alkaline cyanide-free aqueous descaling composition containing elemental sulfur |
| US3627653A (en) * | 1970-01-16 | 1971-12-14 | B R H Ind | Method for cleaning metal and metal parts to remove corrosion therefrom |
| US4012299A (en) * | 1976-04-01 | 1977-03-15 | Allegheny Ludlum Industries, Inc. | Metallic descaling system |
| US4026777A (en) * | 1976-04-01 | 1977-05-31 | Allegheny Ludlum Industries, Inc. | Metallic descaling system |
| DE2710459A1 (de) * | 1976-04-01 | 1977-10-13 | Allegheny Ludlum Ind Inc | Verfahren zum entzundern eines metallischen koerpers |
| DE2714136A1 (de) * | 1976-04-01 | 1977-10-20 | Allegheny Ludlum Ind Inc | Verfahren zur entzunderung eines metallkoerpers |
| US4129485A (en) * | 1976-10-12 | 1978-12-12 | Agency Of Industrial Science & Technology | Method for electrolytic removal of scale from band steel |
| US4066521A (en) * | 1977-02-09 | 1978-01-03 | Allegheny Ludlum Industries, Inc. | Metallic descaling system |
| US4123337A (en) * | 1977-11-02 | 1978-10-31 | Armco Steel Corporation | Method of improving the surface insulation resistance of electrical steels having an insulative coating thereon |
| DE2937992A1 (de) * | 1978-09-21 | 1980-04-17 | Sumitomo Metal Ind | Verfahren und vorrichtung zum kontinuierlichen elektrolytischen entzundern von stahldraht durch kontaktfreien stromfluss |
| US4276133A (en) * | 1978-09-21 | 1981-06-30 | Sumitomo Industries, Ltd. | Method for continuous electrolytic descaling of steel wire by non-contact current flow |
| US4391685A (en) * | 1981-02-26 | 1983-07-05 | Republic Steel Corporation | Process for electrolytically pickling steel strip material |
| US4363709A (en) * | 1981-02-27 | 1982-12-14 | Allegheny Ludlum Steel Corporation | High current density, acid-free electrolytic descaling process |
| US4415415A (en) * | 1982-11-24 | 1983-11-15 | Allegheny Ludlum Steel Corporation | Method of controlling oxide scale formation and descaling thereof from metal articles |
| JPH0314920B2 (de) * | 1982-11-24 | 1991-02-27 | Allegheny Int Inc | |
| JPS5996300A (ja) * | 1982-11-24 | 1984-06-02 | アリゲニ−・ラドラム・ステイ−ル・コ−ポレ−シヨン | 酸化スケ−ル形成の調節法並びに金属製品よりの脱スケ−ル法 |
| US4450058A (en) * | 1983-07-29 | 1984-05-22 | Allegheny Ludlum Steel Corporation | Method for producing bright stainless steel |
| AT402737B (de) * | 1992-04-29 | 1997-08-25 | Andritz Patentverwaltung | Verfahren zum diskontinuierlichen beizen von metallischen platten, insbesondere aus edelstahl |
| US8465790B2 (en) | 1993-12-20 | 2013-06-18 | Astrazeneca Ab | Metallic implant and process for treating a metallic implant |
| US20050161440A1 (en) * | 1993-12-20 | 2005-07-28 | Astrazeneca | Metallic implant and process for treating a metallic implant |
| US7048870B1 (en) | 1993-12-20 | 2006-05-23 | Astrazeneca Ab | Metallic implant and process for treating a metallic implant |
| US20080014243A1 (en) * | 1993-12-20 | 2008-01-17 | Astrazeneca, A Sweden Corporation | Metallic implant and process for treating a metallic implant |
| US6398876B1 (en) * | 1998-12-22 | 2002-06-04 | Andritz—Patentverwaltungs-Gesellschaft m.b.H. | Process for pickling steel |
| US20050234558A1 (en) * | 2002-07-19 | 2005-10-20 | Ingela Petersson | Implant and a method for treating an implant surface |
| US20060154206A1 (en) * | 2002-07-19 | 2006-07-13 | Ingela Petersson | Implant and a method for treating an implant surface |
| US20130074871A1 (en) * | 2011-09-26 | 2013-03-28 | Ak Steel Properties, Inc. | Stainless steel pickling in an oxidizing, electrolytic acid bath |
| US9580831B2 (en) * | 2011-09-26 | 2017-02-28 | Ak Steel Properties, Inc. | Stainless steel pickling in an oxidizing, electrolytic acid bath |
| CN102677140A (zh) * | 2012-05-04 | 2012-09-19 | 大连理工大学 | 一种不锈钢铸件的表面清洗工艺 |
| US20170226604A1 (en) * | 2014-08-18 | 2017-08-10 | Iva Schmetz Gmbh | Method for producing a retort for a nitriding furnace and retort |
| US10294537B2 (en) * | 2014-08-18 | 2019-05-21 | Iva Schmetz Gmbh | Method for producing a retort for a nitriding furnace and retort |
| CN113788520A (zh) * | 2021-10-08 | 2021-12-14 | 北京首钢吉泰安新材料有限公司 | 一种铁铬铝酸洗的工艺及废水处理方法和废水处理装置 |
Also Published As
| Publication number | Publication date |
|---|---|
| DE1161740B (de) | 1964-01-23 |
| GB860709A (en) | 1961-02-08 |
| FR1226856A (fr) | 1960-08-16 |
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