EP 0955394 A3 20000412 - Process for producing a protective coating on the interior surface of a copper pipe

Title (en)

Process for producing a protective coating on the interior surface of a copper pipe

Title (de)

Verfahren zur Erzeugung einer Schutzschicht auf der inneren Oberfläche eines Kupferrohrs

Title (fr)

Procédé de fabrication d'une couche protectrice sur la surface intérieure d'un tuyau en cuivre

Publication

EP 0955394 A3 20000412 (DE)

Application

EP 99107792 A 19990420

Priority

DE 19819925 A 19980505

Abstract (en)

[origin: EP0955394A2] An internal copper dissolution preventative layer is produced on a copper pipe using an aqueous solution to form a basic copper carbonate or copper chloride layer. A protective layer is produced on the interior surface of a copper pipe by (a) filling the pipe with an aqueous oxidizing solution, leaving for 0.1-48 hr. at 10-95 degrees C, water rinsing and then drying; (b) wetting the pipe surface with copper ammonium chloride solution and then contacting with an oxygen-containing gas; or (c) electrodepositing the layer from a basic copper carbonate electrolyte solution, water rinsing and drying.

IPC 1-7

C23C 22/63; C23C 22/52; C23C 8/10; C25D 11/34

IPC 8 full level

C23C 8/10 (2006.01); C23C 8/42 (2006.01); C23C 22/52 (2006.01); C23C 22/63 (2006.01); C25D 11/34 (2006.01)

CPC (source: EP)

C23C 8/42 (2013.01); C23C 22/52 (2013.01); C23C 22/63 (2013.01); C25D 11/34 (2013.01)

Citation (search report)

[Y] DE 1815148 A1 19690724 - WESTERN ELECTRIC CO
[Y] GB 2288600 A 19951025 - SANDOZ LTD [CH]
[YA] EP 0647723 A1 19950412 - KABELMETAL AG [DE]
[Y] US 3497401 A 19700224 - HANSON CHARLES KEITH, et al
[DY] DE 19533410 A1 19970313 - KM EUROPA METAL AG [DE]
[Y] FR 2064465 A5 19710723 - TREFIMETAUX
[A] GB 599971 A 19480325 - JACOB FINLEY BUCKMAN, et al
[A] FR 2500613 A1 19820827 - LIEGE USINES CUIVRE ZINC [BE]
[A] EP 0356732 A1 19900307 - KABELMETAL AG [DE]
[XY] PATENT ABSTRACTS OF JAPAN vol. 011, no. 063 (C - 406) 26 February 1987 (1987-02-26)
[Y] PATENT ABSTRACTS OF JAPAN vol. 006, no. 015 (C - 089) 28 January 1982 (1982-01-28)
[X] PATENT ABSTRACTS OF JAPAN vol. 010, no. 063 (C - 332) 13 March 1986 (1986-03-13)
[Y] DATABASE WPI Section Ch Week 197848, Derwent World Patents Index; Class M13, AN 1978-86882A, XP002129221
[Y] PATENT ABSTRACTS OF JAPAN vol. 003, no. 019 (C - 037) 17 February 1979 (1979-02-17)
[A] PATENT ABSTRACTS OF JAPAN vol. 005, no. 094 (C - 059) 19 June 1981 (1981-06-19)

Designated contracting state (EPC)

AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE

DOCDB simple family (publication)

EP 0955394 A2 19991110; EP 0955394 A3 20000412; EP 0955394 B1 20050119; AT E287460 T1 20050215; DE 19819925 A1 19991111; DE 59911465 D1 20050224; DK 0955394 T3 20050523; ES 2236985 T3 20050716; PT 955394 E 20050331

DOCDB simple family (application)

EP 99107792 A 19990420; AT 99107792 T 19990420; DE 19819925 A 19980505; DE 59911465 T 19990420; DK 99107792 T 19990420; ES 99107792 T 19990420; PT 99107792 T 19990420