JPS5456939A - Method of descaling stainless steel pipe - Google Patents

Method of descaling stainless steel pipe

Info

Publication number
JPS5456939A
JPS5456939A JP12391877A JP12391877A JPS5456939A JP S5456939 A JPS5456939 A JP S5456939A JP 12391877 A JP12391877 A JP 12391877A JP 12391877 A JP12391877 A JP 12391877A JP S5456939 A JPS5456939 A JP S5456939A
Authority
JP
Japan
Prior art keywords
stainless steel
steel pipe
descaling
weight
aqueous solution
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.)
Granted
Application number
JP12391877A
Other languages
Japanese (ja)
Other versions
JPS5540671B2 (en
Inventor
Terumi Oda
Kazuhito Kurachi
Ryohei Minami
Susumu Shintani
Kazuo Azuma
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.)
Nippon Steel Corp
Original Assignee
Sumitomo Metal Industries Ltd
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 Sumitomo Metal Industries Ltd filed Critical Sumitomo Metal Industries Ltd
Priority to JP12391877A priority Critical patent/JPS5456939A/en
Publication of JPS5456939A publication Critical patent/JPS5456939A/en
Publication of JPS5540671B2 publication Critical patent/JPS5540671B2/ja
Granted 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
    • C23G1/02—Cleaning or pickling metallic material with solutions or molten salts with acid solutions
    • C23G1/08—Iron or steel
    • C23G1/086—Iron or steel solutions containing HF

Abstract

PURPOSE:In descaling a stainless steel pipe using a solution of nitric acid and fluoric acid, to add a predetermined quantity of urea to said aqueous solution, thereby to enhance the descaling effect. CONSTITUTION:An aqueous solution containing 5 to 30% by weight of nitric acid and 1 to 20% by weight of fluoric acid is used, and the temperature of said aqueous solution is increased to a range of from 30 to 70 deg.C to descale a stainless steel pipe. In this case, 0.001 to 20% by weight of urea is added to said nitric acid and fluoric acid. By this procedure, the exfoliation of scales can be accelerated and the descaling time can be shortened.
JP12391877A 1977-10-14 1977-10-14 Method of descaling stainless steel pipe Granted JPS5456939A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP12391877A JPS5456939A (en) 1977-10-14 1977-10-14 Method of descaling stainless steel pipe

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP12391877A JPS5456939A (en) 1977-10-14 1977-10-14 Method of descaling stainless steel pipe

Publications (2)

Publication Number Publication Date
JPS5456939A true JPS5456939A (en) 1979-05-08
JPS5540671B2 JPS5540671B2 (en) 1980-10-20

Family

ID=14872556

Family Applications (1)

Application Number Title Priority Date Filing Date
JP12391877A Granted JPS5456939A (en) 1977-10-14 1977-10-14 Method of descaling stainless steel pipe

Country Status (1)

Country Link
JP (1) JPS5456939A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63230892A (en) * 1987-03-20 1988-09-27 Kawasaki Steel Corp Method for picking two-phase stainless steel
EP0915185A1 (en) * 1997-10-28 1999-05-12 Kawasaki Steel Corporation Method of making austenitic stainless steel sheet
WO2001053567A1 (en) * 2000-01-19 2001-07-26 Avestapolarit Aktiebolag (Publ) Pickling agent containing urea and method of producing it
DE102005026409A1 (en) * 2005-06-08 2006-12-14 Vacuumschmelze Gmbh & Co. Kg Cleaning a metal object, especially a neodymium-iron-boron alloy magnet, in an acid bath comprises adding to the bath a substance that reacts with another substance in the bath to generate a gas

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60147963U (en) * 1984-03-09 1985-10-01 株式会社富士通ゼネラル electric motor bracket

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63230892A (en) * 1987-03-20 1988-09-27 Kawasaki Steel Corp Method for picking two-phase stainless steel
JPH0450394B2 (en) * 1987-03-20 1992-08-14 Kawasaki Steel Co
EP0915185A1 (en) * 1997-10-28 1999-05-12 Kawasaki Steel Corporation Method of making austenitic stainless steel sheet
US6149744A (en) * 1997-10-28 2000-11-21 Kawasaki Steel Corporation Method of making austenitic stainless steel sheet
WO2001053567A1 (en) * 2000-01-19 2001-07-26 Avestapolarit Aktiebolag (Publ) Pickling agent containing urea and method of producing it
JP2003520299A (en) * 2000-01-19 2003-07-02 アヴェスタポラリト アーベー Pickling agent containing urea and method for producing the same
AU780485B2 (en) * 2000-01-19 2005-03-24 Avesta Welding Aktiebolag Pickling agent containing urea and method of producing it
DE102005026409A1 (en) * 2005-06-08 2006-12-14 Vacuumschmelze Gmbh & Co. Kg Cleaning a metal object, especially a neodymium-iron-boron alloy magnet, in an acid bath comprises adding to the bath a substance that reacts with another substance in the bath to generate a gas
DE102005026409B4 (en) * 2005-06-08 2008-10-16 Vacuumschmelze Gmbh & Co. Kg Process for cleaning or processing a metal body

Also Published As

Publication number Publication date
JPS5540671B2 (en) 1980-10-20

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