US2894860A - Method of de-scaling of metals by pickling - Google Patents

Method of de-scaling of metals by pickling Download PDF

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Publication number
US2894860A
US2894860A US446530A US44653054A US2894860A US 2894860 A US2894860 A US 2894860A US 446530 A US446530 A US 446530A US 44653054 A US44653054 A US 44653054A US 2894860 A US2894860 A US 2894860A
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Prior art keywords
metal
bath
pickling
scale
scaling
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Expired - Lifetime
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US446530A
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English (en)
Inventor
Erwin A Engelhardt
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Capito and Klein AG
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Capito and Klein AG
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B08—CLEANING
    • B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
    • B08B3/00—Cleaning by methods involving the use or presence of liquid or steam
    • B08B3/04—Cleaning involving contact with liquid
    • B08B3/10—Cleaning involving contact with liquid with additional treatment of the liquid or of the object being cleaned, e.g. by heat, by electricity or by vibration
    • B08B3/12—Cleaning involving contact with liquid with additional treatment of the liquid or of the object being cleaned, e.g. by heat, by electricity or by vibration by sonic or ultrasonic vibrations
    • B08B3/123—Cleaning travelling work, e.g. webs, articles on a conveyor
    • 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
    • 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
    • C23G3/00—Apparatus for cleaning or pickling metallic material

Definitions

  • the presentinvention relates'to a method o'f de-scaling rnetals by pickling.
  • the heretofore knownmethods of de-scaling metals by pickling have the well-known draw- "back that practically the entire scale to be pickled ofi is siderably reduce the de-scaling time over the time heretolforef'required. in similar. circumstances.
  • an acceleration of the de-scaling of metals is obtained by subjecting the metal, which is to be de-scaled in a liquid bath to sound or ultrasound oscillations of such high energy that cavitation occurs.
  • cavitation is meant the phenomenon that the oscillating liquid is torn open by the tensile stresses arising in the oscillating liquid whereby, when the caves which have been formed close again, considerable mechanical forces arise.
  • the treatment with sound or ultrasound (insonation) can be carried out while the metal is in the pickling bath.
  • This embodiment of the invention requires special steps or the employment of special materials in order to prevent the sound emitters or sound heads from being damaged by the pickling liquid.
  • it is particularly advantageous, according to the invention to place the metal to be de-scaled first into a de-scaling bath without subjecting the metal to insonation While leaving the metal in said pickling bath only long enough to bring about a loosening of the scale layer. In other words the metal does not remain long enough in the pickling bath to free the metal from scale.
  • the metal which is still covered with scale is removed from said pickling bath and placed into another liquid bath which may consist for instance of water. It is in this liquid bath that the metal is then subjected to the action of sound or ultrasound, and this insonation brings about a removal of the scale from the metal in a very short time. It should be noted in this connection that the said bath does not have to bring about any chemical reaction but serves merely to transmit the sound Waves for the respective emitter to the respective metal. The sound waves remove from the metal the scale previously loosened in the pickling bath. Consequently, with this method, the sound femitters or sound heads are not exposed to the corrosive attack of the pickling liquid which facilitates and simplifies the construction of said sound emitters or sound heads.
  • the method according to the invention may be carried out by means of the arrangement shown in the drawing in which the reference numeral 1 designates a metallic band to be de-scaled. As will be seen from the drawing,
  • the metalband 1 passes over rollers 4a through the pickling or acid bath 2 while the time during which the band 1 is subjected to the influence of the bath 2 may only be one-fourth or one-third of the normal pickling time, i.e. the pickling time normally employed with the heretofore known methods. not free from scale then passes from the acid bath 2 into i the water bath 3 where it passes over the rollers 4 While
  • the band 1 which is still are preferably so arranged that the band 1 passes there- -bet'weenand is insonated alternately once fromvone side and the next time from the other side.
  • the scale Due to the short period pickling of the material to be de-scaled prior to the insonation, the scale is only partially dissolved in the acid and to the major extent is loosened only so that the scale can be quickly and completely removed by the insonation. If, for instance, with a sheet metal, a normal pickling time of from 10 to 15 minutes is carried out in a 10% sulfuric acid with a bath temperature of to Centigrade, such metal need, according to the present invention, be pickled only for 2 to 4 minutes. Thereupon the insonation is carried out in the water container and causes the separation of the scale, for instance in approximately 10 to 15 seconds.
  • the acid consumption can be reduced by approximately 40%. This is due primarily to the fact that a considerably smaller quantity of the scale is dissolved in the pickling liquid than is the case with the heretofore customary pickling method.
  • the reduced consumption of pickling bath represents in itself not only an important advantage but is also highly advantageous because less costs are involved for the neutralization or regeneration of the consumed acid.
  • the present invention is, by no means, limited to the specific method described and arrangement shown in the drawing but also comprises pickling bath for a period sulficient only for loosening the scale withoutconipletelyremoving samefrom said metal, transferring the thus pretreated metal fromsaid pickling bath intov a water bath, and treating the metal in said last mentioned bath by the action of cavitation caused by Fie din batht t a nqricd nfiiq cn iQn v. t lo cningith sound waves-the energy of which measured on the metal to be de-scaled amounts to at least 2 watts per square centimeter.
  • a method of de-scaling metals which includes the steps of: subjecting the metal to be de-scaled to the action of an acid pickling bath for a period sufficient only for loosening the scale without completely transferring same from said metal, removing the thus pretreated metal from said pickling bath into a water bath, and treating the metal in said last mentioned bath by the action of waves of the frequency range extending from the lower frequency limits of sound waves to the upper frequency limitsof ultra sound waves, the energy of said sound waves measured on the metal to be de-scaled amounting to at least 2 watts per square centimeter.
  • a method of de-scaling metals which includes the steps of: placing the metal to be de-scaled into an acid pickling bath for a period suflicient only for loosening the scale without completely removing same from said metal, removing the thus pretreated metal from the acid cavitation caused by sound waves, the energy of which measured on the metal to be de-scaled amounting to at least 2 watts per square centimeter.
  • a method of de-scaling metals which includes the steps .oftreating the metalito be de-scaled inan acid pickling bath for a period sufiicient only for loosening the scale without completely removing same from said metal, transferring thethus pretreated metal from said pickling bath into a liquid bath adapted to transmit sound Waves andv ultra sound waves, and treating the metal to be descaledin said liquid bathby the action of cavitation pro- ,ducedby sound emitters the energy of which measured on the metal to be descaled amounts to at least two watts persquare centimeter, said liquid bath being substantially; inert to -said soundemitters and-to said metal.

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Cleaning And De-Greasing Of Metallic Materials By Chemical Methods (AREA)
US446530A 1953-07-30 1954-07-29 Method of de-scaling of metals by pickling Expired - Lifetime US2894860A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEC7973A DE1067655B (de) 1953-07-30 1953-07-30 Verfahren und Vorrichtung zum Entzundern von Metallgegenstaenden durch Beizen

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US2894860A true US2894860A (en) 1959-07-14

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DE (1) DE1067655B (de)

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2967119A (en) * 1958-09-08 1961-01-03 Lipsner Smith Corp Ultrasonic process and apparatus
US3033710A (en) * 1957-03-12 1962-05-08 Branson Instr Method of surface cleaning using ultrasonic energy
US3074086A (en) * 1959-02-04 1963-01-22 Tribune Company Apparatus for removing dust from paper webs
US3091557A (en) * 1959-12-17 1963-05-28 Philips Corp Method of cleaning vulcanizing moulds for the manufacture of rubber objects
US3097972A (en) * 1959-10-19 1963-07-16 Atomenergi Ab Di-phase pickling process
US3099584A (en) * 1960-08-08 1963-07-30 Eastman Kodak Co Method for the removal of magnetic sound track from movie film
US3242007A (en) * 1961-11-15 1966-03-22 Texas Instruments Inc Pyrolytic deposition of protective coatings of semiconductor surfaces
US3708263A (en) * 1971-01-15 1973-01-02 Wave Energy Systems Method for continuous sterilization at low temperature
US3837805A (en) * 1971-01-15 1974-09-24 Wave Energy Systems Apparatus for continuous sterilization at low temperature
FR2337923A1 (fr) * 1976-01-12 1977-08-05 Westinghouse Electric Corp Appareil et procede de nettoyage d'un cable ou d'un fil conducteur
US4194922A (en) * 1977-04-18 1980-03-25 Rederiaktiebolaget Nordstjernan Method and apparatus for ultrasonic cleaning of component parts
EP1559484A1 (de) * 2004-01-27 2005-08-03 Siemens Aktiengesellschaft Verfahren zum Entfernen eines Korrosionsproduktes

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DK89192A (da) * 1992-07-07 1994-01-08 Reson System As Integreret afrensningssystem for især samtidig roterende og bearbejdende trommelvolumer
DE102006030364A1 (de) * 2006-06-27 2008-01-03 Siemens Ag Verfahren zum Entfernen einer Schutzbeschichtung von einem Bauteil
CN108160605A (zh) * 2017-12-27 2018-06-15 北京达博有色金属焊料有限责任公司 一种键合丝用线轴线盒的清洗装置

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1623537A (en) * 1926-02-06 1927-04-05 William W Hill Apparatus for treating steel
US2234815A (en) * 1939-12-20 1941-03-11 Goodman Mfg Co Continuous strip pickling and cleaning device
US2554701A (en) * 1947-03-04 1951-05-29 Doehler Jarvis Corp Treatment of articles to remove some of the outside material therefrom or to polish the same
CH278905A (de) * 1949-09-19 1952-02-16 Hans Dr-Ing Mueller Vorrichtung zum Behandeln von Faserstoffbahnen mittels einer Flüssigkeit.
US2616820A (en) * 1947-05-19 1952-11-04 Saint Gobain Vibratory cleansing of objects
US2702260A (en) * 1949-11-17 1955-02-15 Massa Frank Apparatus and method for the generation and use of sound waves in liquids for the high-speed wetting of substances immersed in the liquid
US2724666A (en) * 1951-05-17 1955-11-22 Raytheon Mfg Co Methods of separating materials

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE743794C (de) * 1940-02-29 1944-01-03 Wacker Chemie Gmbh Verfahren zum Reinigen von Gegenstaenden
DE836586C (de) * 1950-05-31 1952-04-15 Saint Gobain Verfahren zum Entfernen von an Metallkoerpern, insbesondere an Giessformen, haftenden festen UEberzuegen
DE937683C (de) * 1951-01-27 1956-01-12 Voith Gmbh J M Verfahren und Vorrichtung zum Reinigen von Maschinen oder Maschinenteilen

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1623537A (en) * 1926-02-06 1927-04-05 William W Hill Apparatus for treating steel
US2234815A (en) * 1939-12-20 1941-03-11 Goodman Mfg Co Continuous strip pickling and cleaning device
US2554701A (en) * 1947-03-04 1951-05-29 Doehler Jarvis Corp Treatment of articles to remove some of the outside material therefrom or to polish the same
US2616820A (en) * 1947-05-19 1952-11-04 Saint Gobain Vibratory cleansing of objects
CH278905A (de) * 1949-09-19 1952-02-16 Hans Dr-Ing Mueller Vorrichtung zum Behandeln von Faserstoffbahnen mittels einer Flüssigkeit.
US2702260A (en) * 1949-11-17 1955-02-15 Massa Frank Apparatus and method for the generation and use of sound waves in liquids for the high-speed wetting of substances immersed in the liquid
US2724666A (en) * 1951-05-17 1955-11-22 Raytheon Mfg Co Methods of separating materials

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3033710A (en) * 1957-03-12 1962-05-08 Branson Instr Method of surface cleaning using ultrasonic energy
US2967119A (en) * 1958-09-08 1961-01-03 Lipsner Smith Corp Ultrasonic process and apparatus
US3074086A (en) * 1959-02-04 1963-01-22 Tribune Company Apparatus for removing dust from paper webs
US3097972A (en) * 1959-10-19 1963-07-16 Atomenergi Ab Di-phase pickling process
US3091557A (en) * 1959-12-17 1963-05-28 Philips Corp Method of cleaning vulcanizing moulds for the manufacture of rubber objects
US3099584A (en) * 1960-08-08 1963-07-30 Eastman Kodak Co Method for the removal of magnetic sound track from movie film
US3242007A (en) * 1961-11-15 1966-03-22 Texas Instruments Inc Pyrolytic deposition of protective coatings of semiconductor surfaces
US3708263A (en) * 1971-01-15 1973-01-02 Wave Energy Systems Method for continuous sterilization at low temperature
US3837805A (en) * 1971-01-15 1974-09-24 Wave Energy Systems Apparatus for continuous sterilization at low temperature
FR2337923A1 (fr) * 1976-01-12 1977-08-05 Westinghouse Electric Corp Appareil et procede de nettoyage d'un cable ou d'un fil conducteur
US4046592A (en) * 1976-01-12 1977-09-06 Westinghouse Electric Corporation Wire cleaning system
US4194922A (en) * 1977-04-18 1980-03-25 Rederiaktiebolaget Nordstjernan Method and apparatus for ultrasonic cleaning of component parts
EP1559484A1 (de) * 2004-01-27 2005-08-03 Siemens Aktiengesellschaft Verfahren zum Entfernen eines Korrosionsproduktes

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DE1067655B (de) 1959-10-22

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