WO2018206350A1 - Hydrophob beschichtetes metallisches bauteil und verfahren zu seiner herstellung - Google Patents
Hydrophob beschichtetes metallisches bauteil und verfahren zu seiner herstellung Download PDFInfo
- Publication number
- WO2018206350A1 WO2018206350A1 PCT/EP2018/061109 EP2018061109W WO2018206350A1 WO 2018206350 A1 WO2018206350 A1 WO 2018206350A1 EP 2018061109 W EP2018061109 W EP 2018061109W WO 2018206350 A1 WO2018206350 A1 WO 2018206350A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- coating
- coating liquid
- component
- water
- fuel
- Prior art date
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09C—TREATMENT OF INORGANIC MATERIALS, OTHER THAN FIBROUS FILLERS, TO ENHANCE THEIR PIGMENTING OR FILLING PROPERTIES ; PREPARATION OF CARBON BLACK ; PREPARATION OF INORGANIC MATERIALS WHICH ARE NO SINGLE CHEMICAL COMPOUNDS AND WHICH ARE MAINLY USED AS PIGMENTS OR FILLERS
- C09C3/00—Treatment in general of inorganic materials, other than fibrous fillers, to enhance their pigmenting or filling properties
- C09C3/12—Treatment with organosilicon compounds
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C22/00—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C22/00—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
- C23C22/05—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M37/00—Apparatus or systems for feeding liquid fuel from storage containers to carburettors or fuel-injection apparatus; Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines
- F02M37/22—Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines, e.g. arrangements in the feeding system
- F02M37/24—Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines, e.g. arrangements in the feeding system characterised by water separating means
Definitions
- the present invention relates to a method for hydrophobic coating of a metallic component and a hydrophobically coated metallic component which can be produced by means of this method. Furthermore, the present invention relates to a use of the hydrophobically coated metallic component.
- biogenic fuels as a blend component for fossil fuels as well as sole fuel increases the corrosion problem
- the coating can be a hybrid polymer obtained by way of a sol-gel process, which can be prepared starting from silicon alkoxides such as, for example, tetraethoxysilane (TEOS). Particularly suitable are special precursors that as
- the method of coating a metallic component includes
- a coating temperature of at least 60 ° C, preferably of at least 150 ° C.
- the coating temperature is preferably at most 350 ° C.
- the coating liquid contains at least one silicone oil.
- This has a kinematic viscosity which is preferably in the range from 5 cSt to 1000 cSt, particularly preferably in the range from 5 cSt to 100 cSt. Silicone oils of such low viscosity have short molecular chains and a low tendency to form vitreous deposits at high temperatures. A measurement of
- kinematic viscosity can be done with an Ubbelohde viscometer according to the standard DIN 51562-1: 1999-01.
- the metallic component is wetted with the coating liquid and its surface is subsequently heated to the coating temperature.
- the wetting can be carried out by spraying or steaming the component with the coating liquid or immersing it in the coating liquid.
- Coating temperature is at least 150 ° C, the heating is preferably carried out over a period in the range of 1 to 10 minutes, since under these conditions rapid formation of a hydrophobic coating takes place. At a coating temperature of less than 100 ° C, the heating is preferably carried out for at least one hour, even among them
- the component is coated in several coating phases, in particular in up to three coating phases. At the beginning of each coating phase it will be on the
- Coating temperature heated and then immersed in the coating liquid. Here it cools down, leaving it at the beginning of the next
- Coating phase in turn must be heated to the coating temperature.
- the initially high temperature of the component initiates a chemical reaction between the silicone oil and the metallic surface of the component.
- the coating liquid further contains water to limit the consumption of silicone oil and water for the
- Coating liquid is first heated to boiling. Then, the component is immersed in the coating liquid. Also in this embodiment, the coating liquid contains water. As a result, the boiling point of the coating liquid is limited to the boiling point of water, ie to 100 ° C. It is preferable that the heating of the coating liquid is continued until it is completely evaporated. As a result, the
- the coating liquid in the first phase still contains water, so that the coating takes place at a temperature of less than 100 ° C.
- the temperature of the coating liquid rises to the boiling temperature of the silicone oil and the second coating phase occurs at this higher temperature.
- the viscosity of the silicone oil is preferably at most 25 cSt, since low-viscosity silicone oils have a low boiling point advantageous for this embodiment.
- Coating liquid contains water, it is preferred that they are 25 vol .-% to 75 vol .-% of water based on 100 vol .-% of the total
- Coating liquid contains at least one suspension stabilizing additive or an emulsifier. Since water and silicone oils are not soluble in one another but merely form a suspension, this ensures that there is no segregation of the suspension through which the water contained in the coating liquid collects on the liquid surface and thus would no longer be available for the coating reaction ,
- the suspension stabilizing additive is selected from the group consisting of ionic, amphoteric and nonionic surfactants. The additive can further catalyze the functionalization of surfaces, thus accelerating the coating reaction.
- the coated metallic component can be produced by means of the method. It is preferably coated in the process to have a contact angle in the range of 100 ° to 120 °. This simple hydrophobization is sufficient to significantly increase the corrosion resistance of the metallic component. Superhydrophobization with contact angles greater than 150 ° is not required to increase corrosion resistance in the manner described.
- the coated metallic component is suitable for use in a device in which it comes into contact with fuel and / or at least one oil.
- the oil may be, for example, a vegetable oil, a fat-based oil, a mineral oil or a silicone oil. Its surface is like that deals with the fact that corrosion is significantly reduced by water contained in the fuel or in the oil compared to uncoated components.
- Fig. 1 shows schematically the coating of a metallic component in
- Fig. 2 shows schematically the coating of a metallic component
- Fig. 3 shows schematically the coating of a metallic component in yet another embodiment of the invention
- Fig. 4a shows a schematic side view of the wetting of a
- Fig. 4b shows a schematic side view of the wetting of a
- Fig. 4c shows a schematic side view of the wetting of a
- coated metallic component according to an embodiment of the invention by water.
- Fig. 4d shows a schematic side view of the wetting of a
- coated metallic component according to an embodiment of the invention by hydrous fuel shows the wetting of a metallic component with hydrous fuel in a corrosion test.
- a metallic component 1 made of steel 1.4125 in the form of a disk with a circular-cylindrical cross-section is introduced into a coating liquid 2
- the coating liquid 2 consists of a silicone oil having a viscosity of 10 cSt or 50 cSt.
- the component 1 is removed from the coating liquid 2 and placed on a 200 ° C hot plate 4 for five minutes. In this time forms from the
- Coating liquid 2 is heated on the heating plate 4 to a temperature of 250 ° C. Then, it is immersed in the coating liquid 2 which contains 40% by volume of a silicone oil having a viscosity of 10 cSt or 50 cSt and 60% by volume of water and which has been treated in an ultrasonic bath for two minutes to obtain an emulsion , The component is left in the coating liquid for 3 minutes and then heated again on the heating plate 4 to a temperature of 250 ° C. This process is repeated twice. In this case, a metallic component 1 having a hydrophobized surface is obtained.
- a third embodiment of the method according to the invention 50 ml of the coating liquid 2 of the second exemplary embodiment are filled into the vessel 3 and placed on the heating plate 4.
- the metallic component 1 is placed in the coating liquid 2 and this is heated to boiling.
- the boiling temperature is initially 100 ° C to the entire in the
- Coating liquid 2 contained water is evaporated or in the
- Coating liquid has evaporated or been consumed. Finally, the resulting coated metallic component 1 is removed from the vessel 3.
- the coated in the above-described embodiments of the method metallic components have a contact angle between 100-110 °.
- FIGS. 4a to 4d it is shown how this hydrophobization of its surface changes its wetting behavior compared to uncoated components.
- Fig. 4a it is shown that an uncoated component 1 of water 5 in the air with a three-phase contact line (phases: air, water and surface) is wetted.
- FIG. 4b shows that also fuel 6, which contains the water 5, wets the component 1 according to a three-phase contact line. Even if the air phase is replaced by the fuel phase here, this does not prevent the water from being in direct contact with the water
- the three-phase contact line is formed in this case between fuel, water and the surface.
- VB denotes a comparative example with an uncoated metallic component.
- the components of Examples Bl and B2 were respectively manufactured according to the second embodiment of the method and the components 1 of Examples B3 and B4 were respectively according to the third
- Embodiment of the method produced silicone oils having different viscosities v were used according to Table 1. After the end of the respective experiment, the defects 12 caused by corrosion were counted on that circular surface 11 of the component 1 which was remote from the bottom of the vessel 61.
- the corrosion resistance of the components 1 according to the second exemplary embodiment of the method according to the invention could be improved compared to the uncoated component.
- Components 1 made according to the third embodiment of the method are even more corrosion resistant than those made according to the second embodiment.
- a low viscosity of the silicone oil used of 10 cSt has been found to be more advantageous
- a higher viscosity of the silicone oil of 50 cSt has been found to be more advantageous.
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Organic Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Combustion & Propulsion (AREA)
- General Engineering & Computer Science (AREA)
- Application Of Or Painting With Fluid Materials (AREA)
- Paints Or Removers (AREA)
Abstract
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
BR112019023455-1A BR112019023455A2 (pt) | 2017-05-10 | 2018-05-02 | Componente metálico revestido hidrofobicamente e método para a sua produção |
CN201880030660.0A CN110582542A (zh) | 2017-05-10 | 2018-05-02 | 经疏水涂覆的金属部件及其制造方法 |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102017207912.6A DE102017207912A1 (de) | 2017-05-10 | 2017-05-10 | Hydrophob beschichtetes metallisches Bauteil und Verfahren zu seiner Herstellung |
DE102017207912.6 | 2017-05-10 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2018206350A1 true WO2018206350A1 (de) | 2018-11-15 |
Family
ID=62165537
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP2018/061109 WO2018206350A1 (de) | 2017-05-10 | 2018-05-02 | Hydrophob beschichtetes metallisches bauteil und verfahren zu seiner herstellung |
Country Status (4)
Country | Link |
---|---|
CN (1) | CN110582542A (de) |
BR (1) | BR112019023455A2 (de) |
DE (1) | DE102017207912A1 (de) |
WO (1) | WO2018206350A1 (de) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102019215170A1 (de) * | 2019-10-02 | 2021-04-08 | Robert Bosch Gmbh | Verfahren zum thermischen Beschichten eines Bauteils mittels eines Silikonöls |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5332767A (en) * | 1990-09-28 | 1994-07-26 | Eckart-Werke Standard Bronzpulver-Werke Carl Eckart Gmbh & Co. | Synthetic resin-coated metal pigment, process for the production thereof and use thereof |
US20090117281A1 (en) * | 2005-10-13 | 2009-05-07 | Takayuki Sato | Coated Metal Pigment, Method for Production of the Same, and Coating Composition Containing the Same |
US20090186166A1 (en) * | 2005-09-29 | 2009-07-23 | Josef Hirsch | Method for Coating a Metallic Component |
EP2320063A2 (de) * | 2009-11-04 | 2011-05-11 | Robert Bosch GmbH | Kraftstoffeinspritzventil |
US20150166760A1 (en) * | 2005-08-05 | 2015-06-18 | Eckart Gmbh | Metal effect pigments comprising a mixed inorganic/organic layer, method for the production of such metal effect pigments, and use thereof |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB720778A (en) * | 1952-03-04 | 1954-12-29 | Bayer Ag | A process of rendering materials hydrophobic |
CN103923493B (zh) * | 2014-03-20 | 2016-04-06 | 江苏荣昌新材料科技有限公司 | 一种氢化硅油处理多孔材料的方法 |
-
2017
- 2017-05-10 DE DE102017207912.6A patent/DE102017207912A1/de not_active Withdrawn
-
2018
- 2018-05-02 BR BR112019023455-1A patent/BR112019023455A2/pt not_active Application Discontinuation
- 2018-05-02 WO PCT/EP2018/061109 patent/WO2018206350A1/de active Application Filing
- 2018-05-02 CN CN201880030660.0A patent/CN110582542A/zh active Pending
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5332767A (en) * | 1990-09-28 | 1994-07-26 | Eckart-Werke Standard Bronzpulver-Werke Carl Eckart Gmbh & Co. | Synthetic resin-coated metal pigment, process for the production thereof and use thereof |
US20150166760A1 (en) * | 2005-08-05 | 2015-06-18 | Eckart Gmbh | Metal effect pigments comprising a mixed inorganic/organic layer, method for the production of such metal effect pigments, and use thereof |
US20090186166A1 (en) * | 2005-09-29 | 2009-07-23 | Josef Hirsch | Method for Coating a Metallic Component |
US20090117281A1 (en) * | 2005-10-13 | 2009-05-07 | Takayuki Sato | Coated Metal Pigment, Method for Production of the Same, and Coating Composition Containing the Same |
EP2320063A2 (de) * | 2009-11-04 | 2011-05-11 | Robert Bosch GmbH | Kraftstoffeinspritzventil |
DE102009046377A1 (de) | 2009-11-04 | 2011-05-26 | Robert Bosch Gmbh | Kraftstoffeinspritzventil |
Also Published As
Publication number | Publication date |
---|---|
DE102017207912A1 (de) | 2018-11-15 |
BR112019023455A2 (pt) | 2020-06-16 |
CN110582542A (zh) | 2019-12-17 |
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