Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
  • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
  • B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
  • B05D7/50—Multilayers
  • B05D7/56—Three layers or more
  • B05D7/57—Three layers or more the last layer being a clear coat
• • 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
  • C23C22/78—Pretreatment of the material to be coated
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
  • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
  • B05D3/00—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials
  • B05D3/10—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by other chemical means
  • B05D3/102—Pretreatment of metallic substrates
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
  • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
  • B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
  • B05D7/14—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials to metal, e.g. car bodies
• • 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
  • C23C22/06—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 using aqueous acidic solutions with pH less than 6
  • C23C22/34—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 using aqueous acidic solutions with pH less than 6 containing fluorides or complex fluorides
• • 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
  • C23C22/73—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 characterised by the process
• • 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
  • C23C22/82—After-treatment
• • 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
  • C23G—CLEANING OR DE-GREASING OF METALLIC MATERIAL BY CHEMICAL METHODS OTHER THAN ELECTROLYSIS
  • C23G1/00—Cleaning or pickling metallic material with solutions or molten salts
• • 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
  • C23G—CLEANING OR DE-GREASING OF METALLIC MATERIAL BY CHEMICAL METHODS OTHER THAN ELECTROLYSIS
  • C23G1/00—Cleaning or pickling metallic material with solutions or molten salts
  • C23G1/02—Cleaning or pickling metallic material with solutions or molten salts with acid solutions
• • 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
  • C23G—CLEANING OR DE-GREASING OF METALLIC MATERIAL BY CHEMICAL METHODS OTHER THAN ELECTROLYSIS
  • C23G1/00—Cleaning or pickling metallic material with solutions or molten salts
  • C23G1/02—Cleaning or pickling metallic material with solutions or molten salts with acid solutions
  • C23G1/12—Light metals
  • C23G1/125—Light metals aluminium
• • G—PHYSICS
  • G10—MUSICAL INSTRUMENTS; ACOUSTICS
  • G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
  • G10K9/00—Devices in which sound is produced by vibrating a diaphragm or analogous element, e.g. fog horns, vehicle hooters or buzzers
• • G—PHYSICS
  • G10—MUSICAL INSTRUMENTS; ACOUSTICS
  • G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
  • G10K9/00—Devices in which sound is produced by vibrating a diaphragm or analogous element, e.g. fog horns, vehicle hooters or buzzers
  • G10K9/18—Details, e.g. bulbs, pumps, pistons, switches or casings
  • G10K9/20—Sounding members
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
  • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
  • B05D1/00—Processes for applying liquids or other fluent materials
  • B05D1/02—Processes for applying liquids or other fluent materials performed by spraying
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
  • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
  • B05D1/00—Processes for applying liquids or other fluent materials
  • B05D1/18—Processes for applying liquids or other fluent materials performed by dipping
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
  • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
  • B05D2202/00—Metallic substrate
  • B05D2202/20—Metallic substrate based on light metals
  • B05D2202/25—Metallic substrate based on light metals based on Al
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
  • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
  • B05D2503/00—Polyurethanes
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
  • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
  • B05D2504/00—Epoxy polymers
• • 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
  • C23C2222/00—Aspects relating to chemical surface treatment of metallic material by reaction of the surface with a reactive medium
  • C23C2222/20—Use of solutions containing silanes

Definitions

• the invention relates to a method for producing, in particular for coating, a vehicle component, as well as a membrane for an ultrasonic sensor.
• a method for producing a membrane for an ultrasonic sensor is known from document DE 102009 034418 A1, in which a passivation layer is applied to an outer surface area of the membrane for improved adhesion of a transparent acrylic powder layer.
• the invention is based on the object of developing a method for producing, in particular for coating, a vehicle component, as well as a membrane for an ultrasonic sensor, in which a larger selection of subsequent layers can be arranged on the membrane.
• the vehicle component means a component of the vehicle which is arranged free from the external environment of the vehicle. Examples of this are decorative panels or vehicle sensors that are arranged on the outside of the vehicle.
• the vehicle component is first provided with an outer surface made of metallic material.
• the outer surface area of the vehicle component is then degreased.
• the outer surface area of the vehicle component is then pickled.
• a second passivation layer is then applied as a second layer to the outer surface area of the vehicle component.
• a first passivation layer deposited as a first layer on the outer surface area, in particular by means of hexafluorotitanic acid.
• the first passivation layer has an inoculating effect on the pickled outer surface and promotes the growth of the subsequently deposited second passivation layer.
• the second passivation layer thus grows significantly faster on the first passivation layer and a passivation layer is produced overall, which is composed of the first and second passivation layers.
• This composite passivation layer has a specific adjustment of the surface energy.
• the composite passivation layer has a surface energy of greater than 70 m N / m.
• the disperse and polar fractions of the surface energy are set in such a way that stable adhesion of a larger selection of subsequent layers applied directly to the passivation layer and thus excellent corrosion protection can be achieved.
• the disperse fractions have a higher surface energy value than the polar fractions.
• the polar fractions in particular have a surface energy of at least 25 mN / m and the disperse fractions have a surface energy of at least 45 mN / m.
• a membrane for an ultrasonic sensor as a vehicle component is preferably produced, in particular coated. First of all, a membrane body made of metallic material, such as aluminum, is provided here. Subsequently, an outer surface area of the membrane body is degreased and the degreased, outer surface area of the membrane body is then pickled. Subsequently, in order to preactivate the subsequently applied second passivation layer, the first passivation layer is deposited as a first layer on the outer surface area. The first layer is deposited here in particular by means of hexafluorotitanic acid.
• the pickling of the outer surface area, in particular the membrane body, and the deposition of the first passivation layer as the first layer on the outer surface area are preferably carried out at the same time, in particular during pickling passivation.
• a primer layer is preferably applied to the second passivation layer as a third layer to protect the metallic material from corrosion.
• a primer layer serves as a primer for subsequently applied layers, but in this context also has a protective effect against corrosion of the metallic material of the membrane body.
• the degreased surface area is preferably treated with a chromium-free pickling which is based in particular on hydrogen fluoride and / or dihydrogen sulfate and / or trihydrogen phosphate.
• This treatment can take place in the immersion process or, alternatively, in the spray process.
• Such a chromium-free stain is less harmful to health.
• a wet paint which is particularly based on polyurethane, is preferably applied to the primer layer as a fourth layer.
• a wet paint has functional properties (e.g. chemical resistance and scratch resistance) and aesthetic properties (e.g. color tone and gloss).
• the wet paint is, in particular, a single-layer topcoat as the end surface.
• the wet paint can also be a basecoat with a clearcoat system applied to it.
• a powder coating is preferably applied to the second passivation layer as the fifth layer.
• a powder coating also has functional properties (e.g. chemical resistance and scratch resistance) and aesthetic properties (e.g. color tone and gloss).
• a 2-component hydro paint is applied to the second passivation layer as the sixth layer.
• Another object of the present invention is a membrane for an ultrasonic transducer with a membrane body made of metallic material.
• the membrane is produced here in particular by means of the method described above for producing, in particular coating, a membrane for an ultrasonic sensor.
• a first passivation layer is arranged as a first layer directly on an outer surface area of the membrane body which has previously been pickled and, in particular, also degreased.
• the second passivation layer is arranged directly on the first passivation layer.
• Such a passivation layer which is made up of composed of a first passivation layer and a second passivation layer offers the advantage that a larger selection of layers can be arranged directly on the composed passivation layer.
• a primer layer is preferably arranged on the passivation layer as a third layer for corrosion protection of the metallic material.
• a primer layer not only serves as a primer for subsequently applied layers, but in this context also has a protective effect against corrosion of the metallic material of the membrane body.
• the primer layer is preferably based on epoxy or polyurethane. In particular, it is a 2-component system on a hydro basis.
• the primer layer preferably has a layer thickness in a range from 30 ⁇ m to 40 ⁇ m.
• a wet paint layer is preferably arranged as the fourth layer on the primer layer.
• the membrane body preferably has an outside and an inside.
• the outside is arranged in particular in the transmission direction of the ultrasonic signals of the ultrasonic sensor.
• the inside of the membrane is arranged in particular in the direction of an interior space of a membrane pot of the ultrasonic sensor.
• the composite passivation layer with the first and second passivation layers are in this case both on the outer surface area of the outside and the inside of the membrane.
• the outside of the membrane body can be provided with different protective and colored layers due to the stronger adhesive effect of the composite passivation layer. Due to the stronger adhesive effect of the composite passivation layer, a piezoceramic, for example, can be attached more easily to the inside of the membrane body.
• the second passivation layer is preferably designed as a zirconium silane compound or an organometallic compound. These connections offer a strong protection against corrosion and an adhesion promotion which is sufficient for the following layers of lacquer and / or for the adhesive of the piezo element to be glued on.
• the first and second passivation layers when combined, preferably have a layer thickness in a range from 30 nm to 100 nm, in particular a layer thickness in a range from 45 nm to 55 nm. The faster growth of the second passivation layer on the first passivation layer thus results in a composite passivation layer to which a larger selection of subsequent layers adhere.
• the connection to organic coatings, such as corrosion protection lacquer layers is reinforced.
• the layer composed of the first and second passivation layers has improved corrosion protection.
• first and second and / or third and / or fourth layers when combined, preferably have a total layer thickness of at most 120 ⁇ m. This guarantees the functioning of the ultrasonic sensor.
• a powder coating is preferably arranged as the fifth layer on the second passivation layer, in particular directly.
• a 2-component hydro paint is preferably arranged as the sixth layer on the second passivation layer, in particular directly.
• the membrane body is preferably designed as a membrane pot, in particular of the ultrasonic sensor.
• the diaphragm pot here has an oscillating diaphragm surface which in particular forms a bottom of the diaphragm pot.
• Another object of the present invention is an ultrasonic sensor with the membrane described above.
• the ultrasonic sensor is designed to transmit and / or receive ultrasonic signals and can in particular be used in parking aids for vehicles.
• FIG. 1 shows a first embodiment of a method for producing a membrane for an ultrasonic sensor as a vehicle component.
• FIG. 2a shows a first embodiment of a membrane for an ultrasonic transducer with a membrane body made of metallic material.
• FIG. 2b shows a second embodiment of a membrane for an ultrasonic transducer with a membrane body made of metallic material.
• FIG. 2c shows a third embodiment of a membrane for an ultrasonic transducer with a membrane body made of metallic material.
• FIG. 2d shows a fourth embodiment of a membrane for an ultrasonic transducer with a membrane body made of metallic material.
• FIG. 3 shows an embodiment of a membrane pot of an ultrasonic sensor with a membrane.
• FIG. 1 shows, in the form of a flow chart, an embodiment of a method for producing, in particular coating, a vehicle component.
• a membrane for an ultrasonic sensor is shown here.
• a membrane body made of metallic material for example aluminum
• an outer surface area of the metallic membrane body is degreased.
• the degreasing is carried out here, for example, by treatment with an alkaline immersion degreasing. Alternatively, the degreasing can also be carried out by acid degreasing or spray degreasing.
• the membrane body is rinsed to wash off the adhering bath solution.
• a chrome-free pickling agent for example based on hydrogen fluoride and / or dihydrogen sulfate and / or trihydrogen phosphate, is used in particular.
• the pickling process is carried out in particular in the dipping process or in the spraying process.
• the defatted Surface area pickled during pickling.
• the stain is adjusted in such a way that the alkaline, degreased surface area after the degreasing process is neutralized during the stain.
• a first passivation layer is deposited as the first layer on the outer surface area.
• the first passivation layer is deposited here in particular by means of hexafluorotitanic acid.
• the membrane body is then rinsed again.
• the first passivation layer serves to preactivate the formation of a second passivation layer applied to the first passivation layer in the following method step 50. This creates a passivation layer composed of a first and a second passivation layer.
• the membrane body is then rinsed again and then dried. The procedure is then terminated.
• Method step 30 and method step 40 optionally take place simultaneously, in particular in a common immersion bath in a pickling passivation step.
• a primer layer is also applied to the second passivation layer as a third layer for corrosion protection of the metallic material of the membrane body.
• a wet paint in particular based on polyurethane, is applied to the primer layer as a fourth layer.
• the wet paint is, in particular, a single-layer topcoat as the end surface.
• the wet paint can also be a basecoat with a clearcoat system applied to it.
• FIG. 2a schematically shows a membrane 101a for an ultrasonic transducer with a membrane body 100 made of metallic material.
• the membrane body 100 is designed as a vibratory membrane surface made of metallic material, in particular aluminum.
• Ultrasonic signals 150a transmitted by means of membrane body 100 and ultrasonic signals 150b received are shown schematically.
• a first passivation layer 105 is arranged on an outer, pickled surface area 106 of the membrane body 100. This first passivation layer 105 serves to pre-activate a crystal formation of a second passivation layer 110, which is arranged directly on the first passivation layer 105. This results in a passivation layer 107 composed of the first passivation layer 105 and the second passivation layer 110.
• the second passivation layer 110 is designed here as a zirconium silane compound. Alternatively, the second passivation layer 110 can also be designed as an organometallic connection. In this exemplary embodiment, the passivation layer 107 composed of first 105 and second passivation layers 110 has a layer thickness 111 of essentially 40 nm.
• a primer layer 120 is arranged on the second passivation layer 110 as a third layer for corrosion protection of the metallic material of the membrane body 100.
• This primer layer is based on epoxy.
• the primer layer can also be based on polyurethane.
• the primer layer 120 has a layer thickness 112 in a range from 30 ⁇ m to 40 ⁇ m.
• a wet lacquer layer 135 is applied to the primer layer 120, which is composed of a base lacquer layer 130 and a clear lacquer layer 140.
• the basecoat layer 130 here has a layer thickness 113 in a range of 10-25 ⁇ m.
• the clear lacquer layer 140 here has a layer thickness 114 in a range from 25-35 ⁇ m.
• FIG. 2b shows a second exemplary embodiment of a membrane 101b for an ultrasonic transducer with a membrane body 100 made of metallic material.
• the same layers as in the first exemplary embodiment are arranged on an outer side 109a of the membrane body 100.
• a further first passivation layer 151 is arranged on an inner side 109b of the membrane body 100.
• a further second passivation layer 152 is applied to the further first passivation layer 151, so that a piezoceramic 125 adheres better to the further passivation layer 108 composed of the first 151 and second passivation layer 152.
• FIG. 2c shows a third exemplary embodiment of a membrane 101c for an ultrasonic transducer with a membrane body 100 made of metallic material.
• a powder coating layer 160 is arranged directly on the second passivation layer 110.
• FIG. 2d shows a fourth exemplary embodiment of a membrane 110d for an ultrasonic transducer with a membrane body 100 made of metallic material.
• a 2-component hydro lacquer layer 170 is arranged directly on the second passivation layer 110.
• FIG. 3 shows a membrane pot 201 as the membrane body of a membrane 200 of an ultrasonic sensor.
• the bottom 204 of the diaphragm pot 201 here has a vibratory diaphragm surface. In the installed state on an outer paneling part of a vehicle, this vibratory membrane surface is arranged freely on the outside of the vehicle.
• the membrane pot 201 is made of a metallic material, in particular aluminum.
• An outer, pickled surface area 203 of an outer side 202 of the membrane pot 201 is in this case covered directly with a first passivation layer 210 as the first layer.
• This first passivation layer 210 serves to pre-activate a second passivation layer 215 as a second layer, which in turn is deposited directly on the first passivation layer 210.
• a primer layer 220 is in turn deposited directly on the second passivation layer 215 as a third layer for corrosion protection of the metallic material of the membrane pot 201.

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• Chemical & Material Sciences (AREA)
• Engineering & Computer Science (AREA)
• General Chemical & Material Sciences (AREA)
• Chemical Kinetics & Catalysis (AREA)
• Mechanical Engineering (AREA)
• Materials Engineering (AREA)
• Metallurgy (AREA)
• Organic Chemistry (AREA)
• Life Sciences & Earth Sciences (AREA)
• Wood Science & Technology (AREA)
• Multimedia (AREA)
• Acoustics & Sound (AREA)
• Physics & Mathematics (AREA)
• Transducers For Ultrasonic Waves (AREA)
• Application Of Or Painting With Fluid Materials (AREA)
• Other Surface Treatments For Metallic Materials (AREA)
• Measurement Of Mechanical Vibrations Or Ultrasonic Waves (AREA)

Applications Claiming Priority (2)

Publications (1)

Family

ID=73497735

Family Applications (1)

Country Status (7)

Family Cites Families (12)

• 2019
  • 2019-12-11 DE DE102019219391.9A patent/DE102019219391A1/de active Pending
• 2020
  • 2020-11-18 EP EP20810896.9A patent/EP4072742A1/de active Pending
  • 2020-11-18 WO PCT/EP2020/082457 patent/WO2021115740A1/de unknown
  • 2020-11-18 CN CN202080086036.XA patent/CN114786826B/zh active Active
  • 2020-11-18 US US17/781,748 patent/US20230018337A1/en active Pending
  • 2020-11-18 KR KR1020227023157A patent/KR20220110819A/ko unknown
  • 2020-11-18 JP JP2022535456A patent/JP7418582B2/ja active Active

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