JPS5325242A - Process for blackening pipes - Google Patents

Process for blackening pipes

Info

Publication number
JPS5325242A
JPS5325242A JP9867776A JP9867776A JPS5325242A JP S5325242 A JPS5325242 A JP S5325242A JP 9867776 A JP9867776 A JP 9867776A JP 9867776 A JP9867776 A JP 9867776A JP S5325242 A JPS5325242 A JP S5325242A
Authority
JP
Japan
Prior art keywords
blackening
pipes
blackening pipes
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.)
Pending
Application number
JP9867776A
Other languages
Japanese (ja)
Inventor
Nobumasa Shigemoto
Toshio Hiruma
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.)
Proterial Ltd
Original Assignee
Hitachi Metals 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 Hitachi Metals Ltd filed Critical Hitachi Metals Ltd
Priority to JP9867776A priority Critical patent/JPS5325242A/en
Publication of JPS5325242A publication Critical patent/JPS5325242A/en
Pending legal-status Critical Current

Links

Landscapes

  • Resistance Heating (AREA)
  • Chemical Treatment Of Metals (AREA)
JP9867776A 1976-08-20 1976-08-20 Process for blackening pipes Pending JPS5325242A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP9867776A JPS5325242A (en) 1976-08-20 1976-08-20 Process for blackening pipes

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP9867776A JPS5325242A (en) 1976-08-20 1976-08-20 Process for blackening pipes

Publications (1)

Publication Number Publication Date
JPS5325242A true JPS5325242A (en) 1978-03-08

Family

ID=14226132

Family Applications (1)

Application Number Title Priority Date Filing Date
JP9867776A Pending JPS5325242A (en) 1976-08-20 1976-08-20 Process for blackening pipes

Country Status (1)

Country Link
JP (1) JPS5325242A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57149302U (en) * 1981-03-16 1982-09-20

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3437532A (en) * 1965-07-14 1969-04-08 Allegheny Ludlum Steel Dark colored stainless steel surfaces
JPS5132443A (en) * 1974-09-13 1976-03-19 Yuasa Battery Co Ltd SUTENRESUKONOHYOMENSHORIHO
JPS5185008A (en) * 1975-01-22 1976-07-26 Hitachi Ltd JIKURYUTAABINNORYUTAIRYUROKOZO

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3437532A (en) * 1965-07-14 1969-04-08 Allegheny Ludlum Steel Dark colored stainless steel surfaces
JPS5132443A (en) * 1974-09-13 1976-03-19 Yuasa Battery Co Ltd SUTENRESUKONOHYOMENSHORIHO
JPS5185008A (en) * 1975-01-22 1976-07-26 Hitachi Ltd JIKURYUTAABINNORYUTAIRYUROKOZO

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57149302U (en) * 1981-03-16 1982-09-20

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