EP 2097561 B1 20120704 - SULPHURATION METHOD OF FERROUS ALLOY PARTS IN AN AQUEOUS SOLUTION
Title (en)
SULPHURATION METHOD OF FERROUS ALLOY PARTS IN AN AQUEOUS SOLUTION
Title (de)
SCHWEFELUNGSVERFAHREN FÜR EISENLEGIERUNGSTEILE IN EINER WÄSSRIGEN LÖSUNG
Title (fr)
PROCEDE DE SULFURATION DE PIECES EN ALLIAGE FERREUX EN SOLUTION AQUEUSE
Publication
Application
Priority
- FR 2007001886 W 20071116
- FR 0655097 A 20061124
Abstract (en)
[origin: FR2909102A1] The superficial treatment method by electrolysis of ferrous surfaces to enhance friction or tread and seizing resistance features, where the surfaces form an electrolysis anode and an electrolysis bath having sodium monosulfide, water, sodium chloride and triethanolamine in quantities which facilitates a sulfuration reaction of the surfaces. The sodium monosulfide is introduced at a concentration equivalent to a concentration of sulfide ions of 20-90 g/L. The sodium chloride is introduced at a concentration equivalent to a concentration of chloride ions of 15-200 g/L. The superficial treatment method by electrolysis of ferrous surfaces to enhance friction or tread and seizing resistance features, where the surfaces form an electrolysis anode and an electrolysis bath having sodium monosulfide, water, sodium chloride and triethanolamine in quantities which facilitates a sulfuration reaction of the surfaces. The sodium monosulfide is introduced at a concentration equivalent to a concentration of sulfide ions of 20-90 g/L. The sodium chloride is introduced at a concentration equivalent to a concentration of chloride ions of 15-200 g/L. A content of triethanolamine is 100-300 mL/L. A working temperature of the bath is lower than 70[deg] C. A duration of the treatment by electrolysis is few seconds, and a density flow applied to the treatment is 8 A/dm 2>. A cathode used in the process is made of stainless steel. An independent claim is included for a part of which surface is treated.
IPC 8 full level
C25D 9/06 (2006.01)
CPC (source: EP KR US)
C25D 3/56 (2013.01 - KR); C25D 5/611 (2020.08 - KR); C25D 9/06 (2013.01 - EP KR US)
Designated contracting state (EPC)
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC MT NL PL PT RO SE SI SK TR
DOCDB simple family (publication)
FR 2909102 A1 20080530; FR 2909102 B1 20090306; BR PI0719074 A2 20131203; CA 2670495 A1 20080612; CA 2670495 C 20151229; CN 101600818 A 20091209; CN 101600818 B 20120425; EP 2097561 A2 20090909; EP 2097561 B1 20120704; ES 2390706 T3 20121115; JP 2010510390 A 20100402; JP 5128609 B2 20130123; KR 101411949 B1 20140626; KR 20090085683 A 20090807; MX 2009005375 A 20090608; MY 148250 A 20130329; PL 2097561 T3 20121130; RU 2009123957 A 20101227; RU 2464362 C2 20121020; TW 200837222 A 20080916; TW I448583 B 20140811; US 2010044234 A1 20100225; US 8562812 B2 20131022; WO 2008068421 A2 20080612; WO 2008068421 A3 20080724; WO 2008068421 A8 20090709
DOCDB simple family (application)
FR 0655097 A 20061124; BR PI0719074 A 20071116; CA 2670495 A 20071116; CN 200780043454 A 20071116; EP 07870292 A 20071116; ES 07870292 T 20071116; FR 2007001886 W 20071116; JP 2009537669 A 20071116; KR 20097012456 A 20071116; MX 2009005375 A 20071116; MY PI20092052 A 20071116; PL 07870292 T 20071116; RU 2009123957 A 20071116; TW 96142965 A 20071114; US 51548007 A 20071116