YU171088A - Process for making hard-pulled tubes of copper or copper alloys, resistant to dot corrosion - Google Patents

Process for making hard-pulled tubes of copper or copper alloys, resistant to dot corrosion

Info

Publication number
YU171088A
YU171088A YU01710/88A YU171088A YU171088A YU 171088 A YU171088 A YU 171088A YU 01710/88 A YU01710/88 A YU 01710/88A YU 171088 A YU171088 A YU 171088A YU 171088 A YU171088 A YU 171088A
Authority
YU
Yugoslavia
Prior art keywords
copper
tubes
hard
films
pitting
Prior art date
Application number
YU01710/88A
Other versions
YU46572B (en
Inventor
U Reiter
A Baukloh
Original Assignee
Kabel Metallwerke Ghh
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=6335681&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=YU171088(A) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Kabel Metallwerke Ghh filed Critical Kabel Metallwerke Ghh
Publication of YU171088A publication Critical patent/YU171088A/en
Publication of YU46572B publication Critical patent/YU46572B/en

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24C—ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
    • B24C3/00—Abrasive blasting machines or devices; Plants
    • B24C3/32—Abrasive blasting machines or devices; Plants designed for abrasive blasting of particular work, e.g. the internal surfaces of cylinder blocks
    • B24C3/325—Abrasive blasting machines or devices; Plants designed for abrasive blasting of particular work, e.g. the internal surfaces of cylinder blocks for internal surfaces, e.g. of tubes
    • B24C3/327—Abrasive blasting machines or devices; Plants designed for abrasive blasting of particular work, e.g. the internal surfaces of cylinder blocks for internal surfaces, e.g. of tubes by an axially-moving flow of abrasive particles without passing a blast gun, impeller or the like along the internal surface

Landscapes

  • Mechanical Engineering (AREA)
  • Engineering & Computer Science (AREA)
  • Metal Extraction Processes (AREA)
  • Cleaning And De-Greasing Of Metallic Materials By Chemical Methods (AREA)
  • Heat Treatment Of Articles (AREA)
  • Preventing Corrosion Or Incrustation Of Metals (AREA)
  • Saccharide Compounds (AREA)
  • Control Of Steam Boilers And Waste-Gas Boilers (AREA)
  • Shaping Metal By Deep-Drawing, Or The Like (AREA)
  • ing And Chemical Polishing (AREA)
  • Cleaning In General (AREA)
  • Meat, Egg Or Seafood Products (AREA)
  • Processing Of Meat And Fish (AREA)
  • Rigid Pipes And Flexible Pipes (AREA)
  • Chemical Treatment Of Metals (AREA)

Abstract

The corrosion damage, particularly that due to local pitting, which occurs on hard-drawn copper tubes used in the sanitary sector is generally caused by carbon-containing films but also by oxide films. A carbon film on the inside of the tube is formed, for example, if the drawing compound added when drawing the tube is subjected to excessive heat. To avoid these damaging films and to improve the pitting resistance of hard tubes made of copper or copper-based alloys, the tubes are first of all degreased. In a further process step, the inner surface of the tubes is then treated with a blasting abrasive in order to establish a minimum roughness. A mean roughness of 0.8 to 1.0 mu m has proven particularly advantageous. The hard-drawn tubes treated by the method according to the invention have none of the films which promote pitting, even after brazing and/or hot bending.
YU171088A 1987-09-10 1988-09-08 PROCEDURE FOR MAKING HARD COPPER PIPES OR COPPER ALLOYS RESISTANT TO SPOT CORROSION YU46572B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE3730367A DE3730367C2 (en) 1987-09-10 1987-09-10 Process for the production of pitting-resistant hard drawn tubes made of copper or copper alloys

Publications (2)

Publication Number Publication Date
YU171088A true YU171088A (en) 1990-04-30
YU46572B YU46572B (en) 1993-11-16

Family

ID=6335681

Family Applications (1)

Application Number Title Priority Date Filing Date
YU171088A YU46572B (en) 1987-09-10 1988-09-08 PROCEDURE FOR MAKING HARD COPPER PIPES OR COPPER ALLOYS RESISTANT TO SPOT CORROSION

Country Status (11)

Country Link
EP (1) EP0306810B2 (en)
AT (1) ATE103225T1 (en)
DE (2) DE3730367C2 (en)
DK (2) DK493288D0 (en)
ES (1) ES2050684T5 (en)
FI (1) FI94496B (en)
GR (1) GR3033568T3 (en)
IE (1) IE63028B1 (en)
PL (1) PL163146B1 (en)
PT (1) PT88473B (en)
YU (1) YU46572B (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4417455C2 (en) 1994-05-19 1997-09-25 Wieland Werke Ag Use of a corrosion-resistant tube with inner oxide layers
FI107543B (en) 1998-07-30 2001-08-31 Outokumpu Oy A method for making a copper tube
FI20001467A (en) * 2000-06-20 2001-12-21 Outokumpu Oy Process for making internally coated copper or copper alloy tubes

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2308436A1 (en) * 1975-04-25 1976-11-19 Cit Alcatel Avoiding carbon deposits during annealing, from lubricants - in the bore of drawn copper tubes, by sweeping with nitrogen
LU81564A1 (en) * 1979-07-31 1981-03-24 Liege Usines Cuivre Zinc METHOD FOR MANUFACTURING TUBES, TUBES OBTAINED BY THIS PROCESS AND THEIR USE IN CONDENSERS AND HEAT EXCHANGERS
DE3018036A1 (en) * 1980-05-10 1981-11-12 Kabel- und Metallwerke Gutehoffnungshütte AG, 3000 Hannover METHOD OF TREATING COPPER PIPES
IT1160196B (en) * 1983-02-24 1987-03-04 Dalmine Spa HOT DEOXIDATION PROCESS OF SEMI-FINISHED METAL TUBES
DE3415376A1 (en) * 1984-04-25 1985-11-07 Uhlmann, Otto, 3167 Burgdorf Method and apparatus for degreasing tubes
US4579596A (en) * 1984-11-01 1986-04-01 Union Carbide Corporation In-situ removal of oily deposits from the interior surfaces of conduits

Also Published As

Publication number Publication date
IE63028B1 (en) 1995-03-22
ATE103225T1 (en) 1994-04-15
IE882707L (en) 1989-03-10
PL163146B1 (en) 1994-02-28
DE3730367C2 (en) 1997-10-09
GR3033568T3 (en) 2000-09-29
DK170250B1 (en) 1995-07-17
DE3888605D1 (en) 1994-04-28
EP0306810B1 (en) 1994-03-23
EP0306810A2 (en) 1989-03-15
PT88473A (en) 1988-10-01
DE3730367A1 (en) 1989-03-23
DK495488D0 (en) 1988-09-06
DK495488A (en) 1989-03-11
YU46572B (en) 1993-11-16
ES2050684T5 (en) 2000-07-01
FI884071A0 (en) 1988-09-02
ES2050684T3 (en) 1994-06-01
PL274547A1 (en) 1989-05-02
PT88473B (en) 1992-11-30
EP0306810B2 (en) 2000-03-29
EP0306810A3 (en) 1990-05-30
DK493288D0 (en) 1988-09-05
FI884071A (en) 1989-03-11
FI94496B (en) 1995-06-15

Similar Documents

Publication Publication Date Title
ZA883561B (en) Corrosion-resisting alloy
YU171088A (en) Process for making hard-pulled tubes of copper or copper alloys, resistant to dot corrosion
JPS54145335A (en) Surface reforming of metal molding
US2559445A (en) Method for removing scale from steel
US4366034A (en) Hard chromium plating process for cobalt-chromium-tungsten alloys
DK169750B1 (en) Internally oxidized pipe, method of making such pipe and use of such pipe
US1821702A (en) Conductor for heat exchange apparatus
JPS60211053A (en) High strength alloy for industrial container
ATE414250T1 (en) COOLING ELEMENT, PARTICULARLY FOR OVENS, AND METHOD FOR PRODUCING A COOLING ELEMENT
DE3760510D1 (en) Process for improving the corrosion resistance of hard or semi-hard copper fitting tubes
PL334652A1 (en) Method of making copper tubes
JPS57211255A (en) Manufacture of airtight terminal
JPS57126956A (en) Heat resistant and abrasion resistant tool material
JPH0639447A (en) Manufacture of corrosion-resisting joint
Hellander Ceramic Coatings for Metal Substrates--the Next Generation
Zaya Modelling the Processes Occurring During the Initial Stages of Pitting Corrosion
Buhler et al. Denickelification Damage of CuNi 30 Fe Tubing
Valeev et al. Effect of the electrodeposition conditions on internal stresses in electroplated nickel coatings
Hashimoto et al. Pitting Corrosion of the Boiler Tubes in a Thermal Power Station
Gruhl et al. Corrosion and Stress Corrosion Problems of Aluminum Structural Alloys
Berezkin et al. Protection of MNZh-5-1 and Steel in Aqueous Solutions of Low Molecular and Hydrochloric Acids by Some Inhibitors During Acid Cleaning of Turbine Condensers in Thermal and Nuclear Power Stations
JP2001183089A (en) Anti-corrosion copper or copper alloy pipe having bent segment, its manufacturing method and water supplying and hot water supplying device
JPS6112900A (en) Method for electropolishing metallic material containing particles of different kind
JPS57120717A (en) Lining shaft