US1981109A - Metal pickling process - Google Patents

Metal pickling process Download PDF

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Publication number
US1981109A
US1981109A US628274A US62827432A US1981109A US 1981109 A US1981109 A US 1981109A US 628274 A US628274 A US 628274A US 62827432 A US62827432 A US 62827432A US 1981109 A US1981109 A US 1981109A
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US
United States
Prior art keywords
metal
acid
pickling
pickling process
inhibitor
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
Application number
US628274A
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English (en)
Inventor
Klamroth Albert
Ahrens Hans
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
IG Farbenindustrie AG
Original Assignee
IG Farbenindustrie AG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by IG Farbenindustrie AG filed Critical IG Farbenindustrie AG
Application granted granted Critical
Publication of US1981109A publication Critical patent/US1981109A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • 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
    • C23G1/04—Cleaning or pickling metallic material with solutions or molten salts with acid solutions using inhibitors
    • C23G1/06—Cleaning or pickling metallic material with solutions or molten salts with acid solutions using inhibitors organic inhibitors
    • C23G1/065—Cleaning or pickling metallic material with solutions or molten salts with acid solutions using inhibitors organic inhibitors sulfur-containing compounds

Definitions

  • the present invention relates to the cleaning and preservation of metallic surfaces wherein the metal is in contact with a liquid of an acid nature. More particularly, the invention relates to the prevention of excessive pitting and embrittlement of a metal when subjected to a pickling process by treatment with a dilute solution of a non-oxidizing acid.
  • Certain objects of the present invention are to prevent the acid pickle liquor from attacking clean portions of the surface of a metal; to obviate over-pickling, embrittlement and pitting of the articles treated; to minimize the amount of metal lost in pickling; to increase the efiiciency of the pickling operation; to prolong the effective life of the pickling bath; and particularly to facilitate the pickling operation.
  • the metal is treated with a dilute acid to remove oxides such as rust, scale. and other deposits, after which the metal is preferably washed with water and dipped into "an alkaline bath to remove the last traces of free acid.
  • the acid removes the rust and scale, but unfortunately, from the pickling standpoint, unless some agent to prevent such action is present, it attacks the cleaned metal itself thereby causing loss of metal and producing an evolution of hydrogen as, which escapes into theain carrying with it a fine spray cifthje afi d l ia uor frorn'fii pickling bath and'pi'ififi'c'ihi'aii'atnfdsphere possessing corrosive properties and one which is injurious to health and damaging to equipment.
  • a regulating agent or ingredient which acts to restrain the action of the acid from attacking clean metal but assists in removing the rust, scale and other deposits, or in other words the regulator or inhibitor causes the acid selectively to remove such materials without appreciably attacking the clean portions of the metal under treatment.
  • the pickle regulator or inhibitor as disclosed in the present application comprises an organlfi ides to sulfoxide.
  • the followingsulmxides have proved Ty effective as solvent i lilntor: bgngyl: sulfoxide, dibenzylsulfoxide, diphenylenesulfoxide, polymerized diethylenesulfoxide, thioanthrenesulfoxide. of e aliphatic N mustang-pe m metal'iicklifi'g.
  • the sulfoxides maybe employed as inhibitors with advantage in a number of operations, as for example, in the commercial pickling of iron and steel, in the removal of rust of corrosion products from the interior of piping where it is inconvenient to dismantle the piping, in the preparation of metals for electroplating where it is desirable to remove oxides and other corrosion products without removing the free metal and particularly without injuring the surface of the metal.
  • the sulfoxides to be very efiicient inhibitors where employed in the acid treatment of ferrous metals, but also in the treatment of otmals, such as g1 hf tin afidfi'llifiiinium.
  • the amount of inhibitor employed will, of course, vary in accordance with the requirements of the operator. For example, in the pickling of heavy, cheap materials, such as, for instance, iron castings, an inhibition of '75 to 90% might be quite satisfactory to the pickler, while in the case of relatively valuable material, such as the finer grades of iron or seamless tubing, the pickler might be dissatisfied with less than 99% or even better inhibition.
  • the amount of inhibition varies somewhat with the kind and amounts of inhibitor employed, although any measurable quantity of inhibitor will produce some retardation of solution.
  • Twitc ells reagent aldehyde condensation products of naphthol sulfonic acids, petroleum sludge acids. some of the higher aldehydes, watersglnble EaEbohydrates, etc.
  • the process oi treating metals which comprises subjecting the metal to a non-oxidizing acid solution containing an aliphatic sulfoxide.

Landscapes

  • 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)
  • Emulsifying, Dispersing, Foam-Producing Or Wetting Agents (AREA)
  • Cleaning And De-Greasing Of Metallic Materials By Chemical Methods (AREA)
  • Preventing Corrosion Or Incrustation Of Metals (AREA)
US628274A 1931-08-14 1932-08-10 Metal pickling process Expired - Lifetime US1981109A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE405690X 1931-08-14

Publications (1)

Publication Number Publication Date
US1981109A true US1981109A (en) 1934-11-20

Family

ID=6421969

Family Applications (1)

Application Number Title Priority Date Filing Date
US628274A Expired - Lifetime US1981109A (en) 1931-08-14 1932-08-10 Metal pickling process

Country Status (4)

Country Link
US (1) US1981109A (pt)
BE (1) BE390398A (pt)
FR (1) FR741086A (pt)
GB (1) GB405690A (pt)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2483499A (en) * 1944-12-08 1949-10-04 Standard Oil Dev Co Lube oil additives and preparation thereof
US2818388A (en) * 1954-01-04 1957-12-31 Stepan Chemical Co Corrosion inhibition
US2956956A (en) * 1954-02-10 1960-10-18 Dehydag Gmbh Inhibitors for acid solutions employed in the surface treatment of metals
US3357924A (en) * 1964-08-13 1967-12-12 Aquitaine Petrole Corrosion inhibitor

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4304681A (en) * 1980-09-15 1981-12-08 Shipley Company, Inc. Novel stripping composition for positive photoresists and method of using same

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2483499A (en) * 1944-12-08 1949-10-04 Standard Oil Dev Co Lube oil additives and preparation thereof
US2818388A (en) * 1954-01-04 1957-12-31 Stepan Chemical Co Corrosion inhibition
US2956956A (en) * 1954-02-10 1960-10-18 Dehydag Gmbh Inhibitors for acid solutions employed in the surface treatment of metals
US3357924A (en) * 1964-08-13 1967-12-12 Aquitaine Petrole Corrosion inhibitor

Also Published As

Publication number Publication date
GB405690A (en) 1934-02-12
BE390398A (pt)
FR741086A (pt) 1933-02-04

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