JPS5518542A - Manufacture of tin free steel excellent in painting property, weldability, workability - Google Patents

Manufacture of tin free steel excellent in painting property, weldability, workability

Info

Publication number
JPS5518542A
JPS5518542A JP8993078A JP8993078A JPS5518542A JP S5518542 A JPS5518542 A JP S5518542A JP 8993078 A JP8993078 A JP 8993078A JP 8993078 A JP8993078 A JP 8993078A JP S5518542 A JPS5518542 A JP S5518542A
Authority
JP
Japan
Prior art keywords
electrolyte
hoop
weldability
workability
acid radical
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
JP8993078A
Other languages
Japanese (ja)
Other versions
JPS5736986B2 (en
Inventor
Katsuji Yoshida
Mitsuo Azuma
Junichi Morita
Tatsushi Koyama
Mikio Kobayashi
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
Nippon Steel Corp
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 Nippon Steel Corp filed Critical Nippon Steel Corp
Priority to JP8993078A priority Critical patent/JPS5518542A/en
Publication of JPS5518542A publication Critical patent/JPS5518542A/en
Publication of JPS5736986B2 publication Critical patent/JPS5736986B2/ja
Granted legal-status Critical Current

Links

Abstract

PURPOSE: To improve TFS (tin free steel) in painting property, weldability, and workability, by keeping an electrolyte at small contents of sulfuric acid radical, nitric acid radical, and hydrochloric acid radical, the electrolyte which comprises principally chromic acid and dichromic acid, to form metallic chromium layer, hydrated chromium oxide layer of good quality.
CONSTITUTION: A steel hoop 1, the surface of which has been cleaned by electrolysis or pickling, is passed through an electrolyte 9 in a tank 7 by means of an energized roll 5, a sink roll 8. An electrolytic current is applied to the hoop 1 as a cathode and to anodes 6 which face to both sides of the hoop 1. The electrolyte is an aq. soln. of chromic acid, dichromic acid, and their salts, and the quantities of impurities contained in the electrolyte, e.g., sulfuric acid radical, nitric acid radical, chlorine ion, are kept small. On the surface of the steel hoop 1 are formed 0.5 mg/m2 metallic chromium layer, and 2W50 mg/m2 hydrated chromium oxide layer per one side of the hoop. The steel sheet fabricated by this method is remarkably excellent in plating property, weldability, and workability.
COPYRIGHT: (C)1980,JPO&Japio
JP8993078A 1978-07-25 1978-07-25 Manufacture of tin free steel excellent in painting property, weldability, workability Granted JPS5518542A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP8993078A JPS5518542A (en) 1978-07-25 1978-07-25 Manufacture of tin free steel excellent in painting property, weldability, workability

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP8993078A JPS5518542A (en) 1978-07-25 1978-07-25 Manufacture of tin free steel excellent in painting property, weldability, workability

Publications (2)

Publication Number Publication Date
JPS5518542A true JPS5518542A (en) 1980-02-08
JPS5736986B2 JPS5736986B2 (en) 1982-08-06

Family

ID=13984407

Family Applications (1)

Application Number Title Priority Date Filing Date
JP8993078A Granted JPS5518542A (en) 1978-07-25 1978-07-25 Manufacture of tin free steel excellent in painting property, weldability, workability

Country Status (1)

Country Link
JP (1) JPS5518542A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5735697A (en) * 1980-08-14 1982-02-26 Nippon Steel Corp Production of chromate film steel plate for vessel of superior weldability and corrosion resistance after painting
JPS5735698A (en) * 1980-08-14 1982-02-26 Nippon Steel Corp Production of chromate film steel plate for vessel of superior weldability and corrosion resistance after painting
US4511631A (en) * 1984-04-13 1985-04-16 Toyo Kohan Co., Ltd. Metallic chromium-nickel-hydrated chromium oxide-coated tin free steel and process for the production thereof
DE3418884A1 (en) * 1984-05-18 1985-11-21 Toyo Kohan Co., Ltd., Tokio/Tokyo SURFACE TREATED STEEL SHEET WITH TRIPLE COATING AND METHOD FOR THE PRODUCTION THEREOF

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4928543A (en) * 1972-07-14 1974-03-14

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4928543A (en) * 1972-07-14 1974-03-14

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5735697A (en) * 1980-08-14 1982-02-26 Nippon Steel Corp Production of chromate film steel plate for vessel of superior weldability and corrosion resistance after painting
JPS5735698A (en) * 1980-08-14 1982-02-26 Nippon Steel Corp Production of chromate film steel plate for vessel of superior weldability and corrosion resistance after painting
JPS5932557B2 (en) * 1980-08-14 1984-08-09 新日本製鐵株式会社 Manufacturing method of chromate-coated steel sheet for containers with excellent weldability and corrosion resistance after painting
JPS5932556B2 (en) * 1980-08-14 1984-08-09 新日本製鐵株式会社 Manufacturing method of chromate-coated steel sheet for containers with excellent weldability and corrosion resistance after painting
US4511631A (en) * 1984-04-13 1985-04-16 Toyo Kohan Co., Ltd. Metallic chromium-nickel-hydrated chromium oxide-coated tin free steel and process for the production thereof
DE3418884A1 (en) * 1984-05-18 1985-11-21 Toyo Kohan Co., Ltd., Tokio/Tokyo SURFACE TREATED STEEL SHEET WITH TRIPLE COATING AND METHOD FOR THE PRODUCTION THEREOF

Also Published As

Publication number Publication date
JPS5736986B2 (en) 1982-08-06

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