GB1300442A - Cleaning metal surfaces - Google Patents

Cleaning metal surfaces

Info

Publication number
GB1300442A
GB1300442A GB913870A GB913870A GB1300442A GB 1300442 A GB1300442 A GB 1300442A GB 913870 A GB913870 A GB 913870A GB 913870 A GB913870 A GB 913870A GB 1300442 A GB1300442 A GB 1300442A
Authority
GB
United Kingdom
Prior art keywords
acid
sulphide
hydroxyethyl
replaced
per cent
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
Application number
GB913870A
Inventor
Fred Norman Teumac
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.)
Dow Chemical Co
Original Assignee
Dow Chemical Co
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 Dow Chemical Co filed Critical Dow Chemical Co
Priority to GB913870A priority Critical patent/GB1300442A/en
Publication of GB1300442A publication Critical patent/GB1300442A/en
Expired legal-status Critical Current

Links

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
    • C23G1/14—Cleaning or pickling metallic material with solutions or molten salts with alkaline solutions
    • C23G1/19—Iron or steel

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)
  • Cleaning And De-Greasing Of Metallic Materials By Chemical Methods (AREA)

Abstract

1300442 Cleaning compositions DOW CHEMICAL CO 25 Feb 1970 9138/70 Heading C7E A metal cleaning solution comprises 0À001 to 0À1 wt per cent of a water soluble sulphide, the sulphide (1) having a majority of molecules capable of releasing sulphide ions, (2) having no cations which will plate out on a clean ferrous metal surface (3) being safe to handle and (4) having a water solubility of at least 0À1% by wt in the cleaning solution; 0À5-40 wt per cent of an alkylene amine carboxylic acid of formula wherein n = 1-4, m = 0-4 and wherein up to two of the carboxymethyl groups may be replaced with a #-hydroxyethyl group and one or more of the carboxymethyl groups may be replaced by carboxyethyl groups; ammonia or alkili; and water. Typical sulphides are Na 2 S, K 2 S, (NH 4 ) 2 S, thioglycolic acid, dithioethanol or mercapto benzothiazole; typical acids are EDTA, N-hydroxyethyl ethylenediaminetriacetic acid, nitrilotriacetic acid, N-2-hydroxyethyl-iminodiacetic acid or diethyleneentriomine acetic-acid. The solution may have pH 7-11, may contain an inhibitor, and is used at 70-190‹C. to clean steel surfaces, particularly those contaminated with Cu.
GB913870A 1970-02-25 1970-02-25 Cleaning metal surfaces Expired GB1300442A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB913870A GB1300442A (en) 1970-02-25 1970-02-25 Cleaning metal surfaces

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB913870A GB1300442A (en) 1970-02-25 1970-02-25 Cleaning metal surfaces

Publications (1)

Publication Number Publication Date
GB1300442A true GB1300442A (en) 1972-12-20

Family

ID=9866106

Family Applications (1)

Application Number Title Priority Date Filing Date
GB913870A Expired GB1300442A (en) 1970-02-25 1970-02-25 Cleaning metal surfaces

Country Status (1)

Country Link
GB (1) GB1300442A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2224750A (en) * 1988-09-26 1990-05-16 Fuji Xerox Co Ltd Method for removing a selenium-containing layer from an electrophotographic photoreceptor

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2224750A (en) * 1988-09-26 1990-05-16 Fuji Xerox Co Ltd Method for removing a selenium-containing layer from an electrophotographic photoreceptor
US5085732A (en) * 1988-09-26 1992-02-04 Fuji Xerox Co., Ltd. Method for removing a selenium-containing layer from a electrophotographic photoreceptor
GB2224750B (en) * 1988-09-26 1992-12-02 Fuji Xerox Co Ltd Method for removing a selenium-containing layer from an electrophotographic photoreceptor

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Legal Events

Date Code Title Description
PS Patent sealed
PLNP Patent lapsed through nonpayment of renewal fees