EP2097561A2 - Procede de sulfuration de pieces en alliage ferreux en solution aqueuse - Google Patents
Procede de sulfuration de pieces en alliage ferreux en solution aqueuseInfo
- Publication number
- EP2097561A2 EP2097561A2 EP07870292A EP07870292A EP2097561A2 EP 2097561 A2 EP2097561 A2 EP 2097561A2 EP 07870292 A EP07870292 A EP 07870292A EP 07870292 A EP07870292 A EP 07870292A EP 2097561 A2 EP2097561 A2 EP 2097561A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- surface treatment
- surfaces according
- ferrous surfaces
- ferrous
- electrolysis
- 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
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D9/00—Electrolytic coating other than with metals
- C25D9/04—Electrolytic coating other than with metals with inorganic materials
- C25D9/06—Electrolytic coating other than with metals with inorganic materials by anodic processes
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D3/00—Electroplating: Baths therefor
- C25D3/02—Electroplating: Baths therefor from solutions
- C25D3/56—Electroplating: Baths therefor from solutions of alloys
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D5/00—Electroplating characterised by the process; Pretreatment or after-treatment of workpieces
- C25D5/60—Electroplating characterised by the structure or texture of the layers
- C25D5/605—Surface topography of the layers, e.g. rough, dendritic or nodular layers
- C25D5/611—Smooth layers
Definitions
- the invention relates to a method for treating metal surfaces and more generally the surfaces of ferrous alloy parts.
- Such treatments are known to those skilled in the art and used in the design of mechanical members, for example when parts must rub together under severe conditions of load and pressure. These treatments can be applied, both in cases where ferrous alloy parts are intended to be lubricated (with oil, grease, etc.) or in cases where the parts are not intended to be lubricated. .
- Phosphating processes are also known which, by creating a surface layer of iron phosphate, make it possible to improve, in noticeable proportions, the effects of lubrication.
- Sulfurization processes are also known, that is to say the production of an iron sulphide (FeS) layer on the surface of the ferrous alloy parts in order to improve their properties of resistance to seizure.
- FeS iron sulphide
- the parts treated by these sulfurization processes have excellent resistance to friction, wear and seizure.
- the invention relates more particularly to this last type of treatment.
- the treated metal parts are immersed for 5 to 15 minutes in a molten salt bath ionized between 200 and 350 0 C, preferably containing potassium thiocyanate and cyanide ions, the ionization being obtained by electrolysis, the treated part being positioned at the anode.
- the FeS layer is obtained by modifying the surface layer of the ferrous alloy part.
- the parts are immersed in an aqueous solution containing sodium hydroxide at a concentration of between 400 and 1000 g / l, sodium thiosulfate and sodium sulphide at a temperature above 100 0 C for about 15 minutes.
- the major disadvantage of this process is the natural carbonation of the bath which makes it progressively unusable. This inevitable degeneration imposes both economic and ecological constraints. Also, the treatment times are long, which is detrimental.
- the problem to be solved by the invention is to reduce the amount of toxic products generated by the process and reduce the energy consumption required by it, while maintaining a high anti-seizing effect and good adhesion of the iron sulphide layer on the treated parts.
- the sulfur species is a sulphide. It may be sodium monosulfide, potassium monosulfide, ammonium monosulfide. It may also be thiosulfate, such as sodium thiosulfate, potassium thiosulfate, ammonium thiosulfate. It can also be a sulphite.
- the sulphide is introduced at a concentration equivalent to a sulphide ion concentration of between 20 g / l and 90 g / l.
- the sulphide is sodium monosulphide, introduced at a concentration of between 50 and 200 g / l.
- the chlorinated salt is a chloride, for example sodium chloride, potassium chloride, lithium chloride, ammonium chloride, calcium chloride or magnesium chloride. It may also be hypochlorite, chlorite, chlorate or perchlorate, for example sodium, potassium, lithium, ammonium, calcium or magnesium.
- the chloride is introduced at a concentration equivalent to a chloride ion concentration of between approximately 15 and 200 g / l.
- the chloride is sodium chloride, introduced at a concentration between 30 and 300 g / l.
- the nitrogen species content is between 100 mL / L and 300 mL / L approximately.
- the nitrogen species may comprise a nitrogen or several nitrogens. It can for example be a base, possibly low or very low. It can also be a weakened base, for example by a substituent, or conversely an enriched base. It can be an organic species.
- the nitrogen species is an amine, for example a monosubstituted or polysubstituted amine. This is for example triethanolamine, or methylamine, phenylamine, diethylamine, diphenylamine, cyclohexylamine, for example.
- the amine can be introduced in the form of an amino acid such as alanine, glutamic acid or praline, for example.
- the nitrogenous species may also be an amide, an amidine, a guanidine, a hydrazine or a hydrazone. It can also be a mixture of these compounds.
- the nitrogen species may also carry one or more oxygen atoms or one or more alcohol functions at a selected distance from the nitrogen or at selected distances from the nitrogen atom or nitrogen atoms. It can also carry other atoms or other functions.
- triethanolamine is used, and the amount of triethanolamine introduced is between 100 ml / l and 300 ml / l.
- the mechanism of action of this molecule is not eluded, and the respective roles of each of the characteristics of this molecule are not known.
- the nitrogen species content in triethanolamine equivalent is evaluated according to conventional methods, in which case the preferred content of nitrogen species is equivalent to a triethanolamine content of between 100 ml / l and 300 ml / l.
- the working temperature of the bath is less than 70 ° C. It can be the ambient temperature, which reduces the energy consumption.
- the duration of the electrolysis treatment is less than 1 hour, or in some cases less than 10 minutes, or even less than one minute.
- the electrolysis is carried out using a direct current, According to one characteristic, the electrolysis is carried out using a pulsed current. This can be applied as a crenellated signal, or in another form.
- the pulsed current has a frequency lower than 500 kHz (that is to say a period greater than 2 ⁇ s).
- the duration of the pulses is less than the period of the signal, and according to one characteristic, it is less than 50 ms.
- the average current density is between 3 and 15 A / dm 2 , and is for example about 8 A / dm 2 , or 5 A / dm 2 .
- the cathode is an inert conductive material in the solution. Preferably, it is made of stainless steel.
- the invention also relates to parts whose surface is treated according to the method according to the invention.
- the parts to be treated are positioned in an electrolysis bath at the anode.
- a current density is applied between the parts and a cathode.
- the duration of the treatment is between a few seconds and 10 minutes, or even 20, 30 minutes or more, depending on the geometry and the surface of the parts to be treated.
- the treatment is typically carried out at a temperature below 70 ° C.
- the galling resistance resulting from the treatment process according to the invention is evaluated according to the Faville Levally machine test according to the ASTM-D-2170 standard.
- this test consists of treating a 6.35 mm diameter cylindrical specimen with a height of 50 mm in hardened and ground cemented 16NC6 steel. The specimen is clamped between two V-shaped jaws at 90 ° to which a linearly increasing load is applied as a function of time. The test is stopped when there is seizure or creep of the specimen.
- This test is characterized by a magnitude called note Faville which is the integral of the applied load with respect to the time, this note being expressed in daN.s.
- Example 1 According to this example, the Faville rating of steel specimens is compared
- 16NC6 quenched hardened in the case of an untreated test piece (1), a phosphated test piece (2), a test piece according to the method of the invention (3).
- the test piece according to the invention is soaked in an aqueous solution and maintained at the anode.
- the cathode is made of stainless steel.
- the aqueous solution contains 100 g / l of sodium monosulfide, 50 g / l of sodium chloride and 200 ml / l of triethanolamine.
- the treatment is carried out, according to a first variant, at ambient temperature (20 ° C.) for 10 seconds, the current is continuous and the current density applied is 8 A / dm 2 .
- the treatment is carried out always at room temperature, but for 5 minutes, with a current pulsed at a frequency of 25 Hz (that is to say with a period of 40 ms), the duration of the pulses being 10 ms, and the current density averaged over a period of 4 A / dm 2 .
- specimens 1 and 2 have no anti-seize property while specimens 3 and 4, according to the invention, have high anti-seizing properties.
- the test piece according to the invention is immersed in a bath of an aqueous solution and maintained at the anode.
- the cathode is made of stainless steel.
- the aqueous solution contains 100 g / l of sodium monosulfide, 50 g / l of sodium chloride and 200 ml / l of triethanolamine.
- the treatment is carried out at ambient temperature (20 ° C.) for 10 minutes, with a current pulsed at a frequency of 200 kHz (that is to say with a period of 5 ⁇ s), the duration of the pulses being 2 ⁇ s, and the current density averaged over a period of 4
- the treatment is carried out always at room temperature, but for 10 minutes with a direct current and a current density of 5 A / dm 2 .
- the skilled person will adapt the duration of the treatment, which may be between a few seconds and 30 minutes or more, being for example of the order of magnitude of 10 minutes. It will also adapt the temperature, which may be the ambient temperature, or a temperature below 70 0 C or more. It will also adapt the current density.
Abstract
Description
Claims
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PL07870292T PL2097561T3 (pl) | 2006-11-24 | 2007-11-16 | Sposób siarkowania elementów ze stopów żelaza w roztworze wodnym |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR0655097A FR2909102B1 (fr) | 2006-11-24 | 2006-11-24 | Procede de sulfuration de pieces en alliage ferreux en solution aqueuse. |
PCT/FR2007/001886 WO2008068421A2 (fr) | 2006-11-24 | 2007-11-16 | Procede de sulfuration de pieces en alliage ferreux en solution aqueuse |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2097561A2 true EP2097561A2 (fr) | 2009-09-09 |
EP2097561B1 EP2097561B1 (fr) | 2012-07-04 |
Family
ID=37767785
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP07870292A Not-in-force EP2097561B1 (fr) | 2006-11-24 | 2007-11-16 | Procede de sulfuration de pieces en alliage ferreux en solution aqueuse |
Country Status (15)
Country | Link |
---|---|
US (1) | US8562812B2 (fr) |
EP (1) | EP2097561B1 (fr) |
JP (1) | JP5128609B2 (fr) |
KR (1) | KR101411949B1 (fr) |
CN (1) | CN101600818B (fr) |
BR (1) | BRPI0719074A2 (fr) |
CA (1) | CA2670495C (fr) |
ES (1) | ES2390706T3 (fr) |
FR (1) | FR2909102B1 (fr) |
MX (1) | MX2009005375A (fr) |
MY (1) | MY148250A (fr) |
PL (1) | PL2097561T3 (fr) |
RU (1) | RU2464362C2 (fr) |
TW (1) | TWI448583B (fr) |
WO (1) | WO2008068421A2 (fr) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN109402622A (zh) * | 2018-12-21 | 2019-03-01 | 上海应用技术大学 | 一种用于循环冷却水处理的无磷预膜剂的制备方法 |
Family Cites Families (21)
Publication number | Priority date | Publication date | Assignee | Title |
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FR1136181A (fr) * | 1954-12-04 | 1957-05-10 | Daimler Benz Ag | Procédé pour la préparation de surfaces résistant à l'usure, en particulier d'é'léments métalliques soumis à des chocs |
FR1406530A (fr) * | 1964-05-28 | 1965-07-23 | Hydromecanique Et Frottement S | Procédé de traitement de surfaces métalliques et produits ainsi traités |
FR2050754A5 (en) * | 1969-06-24 | 1971-04-02 | Stephanois Rech | Electrolytic treatment of iron surfaces |
FR2161155A6 (fr) * | 1970-11-23 | 1973-07-06 | Stephanois Rech | |
GB1552311A (en) * | 1977-03-10 | 1979-09-12 | Inoue Japax Res | Electrolytic gernaration of hydrogen and oxygen |
GB2034354B (en) * | 1978-11-11 | 1982-12-01 | Ibm | Elimination of anode hydrogen cyanide formation in trivalent chromium plating |
SU931801A1 (ru) | 1980-05-05 | 1982-05-30 | Рубцовский Проектно-Конструкторский Технологический Институт Тракторостроения | Состав дл электролитического сульфидировани |
US4615777A (en) * | 1982-11-24 | 1986-10-07 | Olin Corporation | Method and composition for reducing the voltage in an electrolytic cell |
SU1592409A1 (ru) * | 1988-03-10 | 1990-09-15 | Univ Karagandin | Cпocoб cульфидиpobahия meди |
JP3249059B2 (ja) * | 1996-12-20 | 2002-01-21 | 日本パーカライジング株式会社 | 金属摺動部材用表面処理液および表面処理方法 |
JPH1150297A (ja) * | 1997-06-04 | 1999-02-23 | Nippon Parkerizing Co Ltd | 耐摩耗性が優れた皮膜の形成方法及び耐摩耗性皮膜が施された鉄系材料 |
US6139973A (en) * | 1997-06-04 | 2000-10-31 | Nihon Parkerizing Co., Ltd | Method for forming wear-resistant layer and iron-based material, on which wear-resistant layer is applied |
JP4150785B2 (ja) * | 1998-04-23 | 2008-09-17 | Dowaサーモテック株式会社 | 鉄または鉄合金の硫化処理法 |
JP4126346B2 (ja) * | 1999-10-20 | 2008-07-30 | Dowaサーモテック株式会社 | 耐焼付き性に優れた摺動部材およびその製法 |
JP2002070726A (ja) * | 2000-08-24 | 2002-03-08 | Zexel Valeo Climate Control Corp | 容量可変型斜板式圧縮機 |
JP2002235193A (ja) * | 2001-02-08 | 2002-08-23 | Nippon Parkerizing Co Ltd | 摺動性に優れた硫化鉄系皮膜の形成方法及び硫化鉄系皮膜が施された鉄系材料 |
FR2823227B1 (fr) | 2001-04-04 | 2004-04-02 | Stephanois Rech Mec | Procede de traitement de pieces en alliage ferreux pour ameliorer leurs proprietes frottantes, sans perte de leur durete ni deformation |
KR100902521B1 (ko) * | 2002-02-28 | 2009-06-15 | 도꾸리쯔교세이호진 상교기쥬쯔 소고겡뀨죠 | 금속구리의 생산을 위한 전해공정 및 그 장치 |
JP4022605B2 (ja) * | 2003-08-04 | 2007-12-19 | Dowaサーモテック株式会社 | 耐焼付き性に優れた摺動部材の製法 |
FR2860806B1 (fr) * | 2003-10-14 | 2006-01-06 | Stephanois Rech Mec | Procede de traitement par sulfuration de pieces en alliage ferreux |
US20070125659A1 (en) * | 2005-11-14 | 2007-06-07 | Hecker Cartes Christian H D | Process for optimizing the process of copper electro-winning and electro-refining by superimposing a sinussoidal current over a continuous current |
-
2006
- 2006-11-24 FR FR0655097A patent/FR2909102B1/fr not_active Expired - Fee Related
-
2007
- 2007-11-14 TW TW096142965A patent/TWI448583B/zh not_active IP Right Cessation
- 2007-11-16 JP JP2009537669A patent/JP5128609B2/ja not_active Expired - Fee Related
- 2007-11-16 CN CN2007800434545A patent/CN101600818B/zh not_active Expired - Fee Related
- 2007-11-16 MY MYPI20092052A patent/MY148250A/en unknown
- 2007-11-16 ES ES07870292T patent/ES2390706T3/es active Active
- 2007-11-16 KR KR1020097012456A patent/KR101411949B1/ko not_active IP Right Cessation
- 2007-11-16 BR BRPI0719074-3A patent/BRPI0719074A2/pt not_active Application Discontinuation
- 2007-11-16 RU RU2009123957/02A patent/RU2464362C2/ru not_active IP Right Cessation
- 2007-11-16 MX MX2009005375A patent/MX2009005375A/es active IP Right Grant
- 2007-11-16 CA CA2670495A patent/CA2670495C/fr not_active Expired - Fee Related
- 2007-11-16 PL PL07870292T patent/PL2097561T3/pl unknown
- 2007-11-16 EP EP07870292A patent/EP2097561B1/fr not_active Not-in-force
- 2007-11-16 WO PCT/FR2007/001886 patent/WO2008068421A2/fr active Application Filing
- 2007-11-16 US US12/515,480 patent/US8562812B2/en not_active Expired - Fee Related
Non-Patent Citations (1)
Title |
---|
See references of WO2008068421A2 * |
Also Published As
Publication number | Publication date |
---|---|
FR2909102A1 (fr) | 2008-05-30 |
KR20090085683A (ko) | 2009-08-07 |
FR2909102B1 (fr) | 2009-03-06 |
KR101411949B1 (ko) | 2014-06-26 |
TW200837222A (en) | 2008-09-16 |
PL2097561T3 (pl) | 2012-11-30 |
WO2008068421A8 (fr) | 2009-07-09 |
JP2010510390A (ja) | 2010-04-02 |
CA2670495A1 (fr) | 2008-06-12 |
CN101600818B (zh) | 2012-04-25 |
US8562812B2 (en) | 2013-10-22 |
TWI448583B (zh) | 2014-08-11 |
CA2670495C (fr) | 2015-12-29 |
JP5128609B2 (ja) | 2013-01-23 |
MY148250A (en) | 2013-03-29 |
RU2464362C2 (ru) | 2012-10-20 |
BRPI0719074A2 (pt) | 2013-12-03 |
US20100044234A1 (en) | 2010-02-25 |
WO2008068421A3 (fr) | 2008-07-24 |
MX2009005375A (es) | 2009-06-08 |
ES2390706T3 (es) | 2012-11-15 |
EP2097561B1 (fr) | 2012-07-04 |
CN101600818A (zh) | 2009-12-09 |
RU2009123957A (ru) | 2010-12-27 |
WO2008068421A2 (fr) | 2008-06-12 |
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