CN104959289A - Technology for processing corrosion marks on surface of silencer of engine exhaust pipe - Google Patents
Technology for processing corrosion marks on surface of silencer of engine exhaust pipe Download PDFInfo
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- CN104959289A CN104959289A CN201510456074.0A CN201510456074A CN104959289A CN 104959289 A CN104959289 A CN 104959289A CN 201510456074 A CN201510456074 A CN 201510456074A CN 104959289 A CN104959289 A CN 104959289A
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- coating
- muffler
- zinc
- heating furnace
- exhaust pipe
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Abstract
The invention relates to a technology for processing corrosion marks on the surface of a silencer of an engine exhaust pipe. The technology comprises the following steps that firstly, pre-processing is carried out on the surface of the a vehicle silencer; cleaning and drying are carried out on the surface of the vehicle silencer so that oil and dust on the surface of the vehicle silencer can be removed; a zinc-chrome film is selected, the surface of the vehicle silencer is coated with the zinc-chrome film, the coating uniformity is guaranteed, and problem that bubbles are generated is avoided; the vehicle silencer coated with the zinc-chrome film is put into a heating furnace to be subjected to solidifying, a solidifying parameter is set, and the solidifying temperature is set to range from 280 DEG C to 320 DEG C; after the solidifying is carried out on the zinc-chrome film, a layer of teflon coating is coated, the vehicle silencer is put into the heating furnace to be subjected to secondary solidifying, and the solidifying temperature is set to range from 220 DEG C to 250 DEG C; after secondary solidifying is carried out, the vehicle silencer is cooled in a natural mode and can be utilized. According to the technology, the problem that the point corrosion easily happens to the connecting portion of an existing vehicle silencer coating is solved.
Description
Technical field
The present invention relates to muffler field, particularly, relate to the technique of process exhaust pipe of engine muffler surface corrosion spot.
Background technology
Mobile muffler, as the important composition parts of automobile exhaust pipeline, has very important effect in whole automobile industry.A kind of device that mobile muffler specifically refers to prevention sound transmission and allows air-flow to pass through is the important measures eliminating air power noise.The kind of muffler is a lot, but studies carefully the principle of its noise reduction, can be divided into the type that six kinds main, i.e. resistive muffler, resistant noise-reducing device, impedance composite muffler, microperforated panel muffler, aperture muffler and active muffler.
Being the service life in order to improve effector to the surface treatment of mobile muffler, at present, plating or coating generally all being adopted to the surface treatment of mobile muffler, the easy appearance point corrosion of connecting portion of existing mobile muffler coating.
Summary of the invention
Technical problem to be solved by this invention is to provide the technique of process exhaust pipe of engine muffler surface corrosion spot, with the problem of the easy appearance point corrosion of the connecting portion overcoming existing mobile muffler coating.
The present invention's adopted technical scheme that solves the problem is: the technique of process exhaust pipe of engine muffler surface corrosion spot, comprises the following steps:
First, the pre-treatment on the surface of mobile muffler: to clean the surface of mobile muffler, dry process, to remove oil and the dust on mobile muffler surface;
Secondly, select Zn/Cr Film Coating on the surface of mobile muffler, guarantee the uniformity applied, avoid producing the problems such as bubble;
Then, the mobile muffler being coated with Zinc-Chromium film is put into heating furnace and is cured process, solidification temperature is arranged on 280 DEG C ~ 320 DEG C by the parameter arranging solidification;
Subsequently, after Zinc-Chromium film solidification, apply one deck teflon coating again, then put into heating furnace and carry out regelate process solidification temperature and be arranged on 220 DEG C ~ 250 DEG C;
Finally, can use after the mobile muffler after regelate being cooled naturally.
At present, plating or coating are generally all adopted to the surface treatment of mobile muffler, the easy appearance point corrosion of connecting portion of existing mobile muffler coating, due to connecting portion in use, friction and vibrations can be produced, and then cause the destruction appearance point of coating to corrode, the present invention is coated with by applying one deck teflon coating on the basis being coated with zinc-chromium coating again, polytetrafluoroethylene (PTFE) is prior art material, it has resistant to elevated temperatures feature, its coefficient of friction is extremely low, avoid the wearing and tearing of the coating of the connecting portion of mobile muffler, and then avoid the problem of spot corrosion of connecting portion, so, instant invention overcomes the problem of the easy appearance point corrosion of connecting portion of existing mobile muffler coating, and, the material selection Zinc-Chromium film of coating of the present invention, Zinc-Chromium film is prior art material, i.e. Dacroment, Zinc-Chromium film liquid is a kind of water base treatment fluid, Zn/Cr Film Coating technique is a kind of brand-new process for treating surface, during Zinc-Chromium film solidification, the volatile substances such as the moisture in film, organic (cellulose) material are while volatilization, rely on the oxidisability of the high price chromic salts in Zinc-Chromium film mother liquor, the simple substance zinc metal sheet making electrode potential negative value larger, aluminium flake slurry and iron-based precursor reactant, form the electrodeless coating of chromic salts compound of Fe, Zn, Al.Because coating directly reacts acquisition by Zinc-Chromium film and matrix, so this coating is fine and close, this coating is under the condition of corrosion, numerous galvanic cell can be formed, the i.e. salt such as Al, Zn of comparatively bearing of first hot spot current potential, until they run out of just likely erode to matrix itself, matrix of the present invention specifically refers to mobile muffler, any acid treatment can not be carried out in the whole technical process of the present invention, ooze the problem of hydrogen when also there is not plating, add that coating is at high temperature solidified, so ensure that zinc-chromium coating can not produce the problem of hydrogen embrittlement.
Further, solidification temperature is set to 300 DEG C, and the temperature of regelate is set to 250 DEG C.Solidification temperature is set to 300 DEG C of effects guaranteeing that Zinc-Chromium film is solidified and reaches best; The temperature of regelate is set to 250 DEG C and guarantees that the solidification effect of tetrafluoroethene coating reaches best.
Further, zinc-chromium coating is coated in coating method employing spraying or the dip-coating of mobile muffler; Teflon coating adopts dip-coating.Spraying or the mode of dip-coating simple to operate and coating comparatively even, all can be used as the painting method of zinc-chromium coating, and dip-coating can also avoid the problem spraying holiday, teflon coating can be coated in each position of mobile muffler, avoid uncoated teflon coating to be coated with the problem of the spot corrosion caused.
Further, be provided with humidity sensor in heating furnace, humidity sensor is connected with controller, and controller is connected to the switch of heating furnace.Humidity sensor can be real-time the humidity of induction zinc-chromium coating, when humidity reaches ideal value, controlled the closedown of the switch of heating furnace by controller, avoid zinc-chromium coating hardening time not or over cure.
To sum up, the invention has the beneficial effects as follows:
1, the present invention is coated with by applying one deck teflon coating on the basis being coated with zinc-chromium coating again, polytetrafluoroethylene (PTFE) is prior art material, it has resistant to elevated temperatures feature, its coefficient of friction is extremely low, avoid the wearing and tearing of the coating of the connecting portion of mobile muffler, and then avoid the problem of spot corrosion of connecting portion.
2, the present invention is by being set to zinc-chromium coating by coating, and Zinc-Chromium film is coated in heating furnace is cured process, effectively avoids the problem of traditional testing electroplated hydrogen embrittlement.
3, the present invention by being provided with humidity sensor in heating furnace, humidity sensor is connected with controller, controller is connected to the switch of heating furnace, by the humidity of induction zinc-chromium coating that humidity sensor can be real-time, when humidity reaches ideal value, the closedown of switch of heating furnace is controlled, the time avoiding zinc-chromium coating solidify inadequate or over cure by controller.
Detailed description of the invention
Below in conjunction with embodiment, to the detailed description further of invention do, but embodiments of the present invention are not limited thereto.
Embodiment 1:
The technique of process exhaust pipe of engine muffler surface corrosion spot, comprises the following steps:
First, the pre-treatment on the surface of mobile muffler: to clean the surface of mobile muffler, dry process, to remove oil and the dust on mobile muffler surface;
Secondly, select Zinc-Chromium film to be sprayed on the surface of mobile muffler, guarantee the uniformity applied, avoid producing the problems such as bubble;
Then, the mobile muffler being coated with Zinc-Chromium film is put into heating furnace and is cured process, solidification temperature is set to 300 DEG C by the parameter arranging solidification;
Subsequently, dip-coating one deck teflon coating again after Zinc-Chromium film solidification, then put into heating furnace and carry out regelate process solidification temperature and be set to 250 DEG C;
Finally, can use after naturally being cooled by the mobile muffler after regelate, be provided with humidity sensor in described heating furnace, humidity sensor is connected with controller, and controller is connected to the switch of heating furnace.
Embodiment 2: the spraying in embodiment 1, based on embodiment 1, is replaced with dip-coating by the present embodiment.
As mentioned above, the present invention can be realized preferably.
Claims (4)
1. process the technique of exhaust pipe of engine muffler surface corrosion spot, it is characterized in that, comprise the following steps:
First, the pre-treatment on the surface of mobile muffler: to clean the surface of mobile muffler, dry process, to remove oil and the dust on mobile muffler surface;
Secondly, select Zn/Cr Film Coating on the surface of mobile muffler, guarantee the uniformity applied, avoid producing the problems such as bubble;
Then, the mobile muffler being coated with Zinc-Chromium film is put into heating furnace and is cured process, solidification temperature is arranged on 280 DEG C ~ 320 DEG C by the parameter arranging solidification;
Subsequently, after Zinc-Chromium film solidification, apply one deck teflon coating again, then put into heating furnace and carry out regelate process solidification temperature and be arranged on 220 DEG C ~ 250 DEG C;
Finally, can use after the mobile muffler after regelate being cooled naturally.
2. the technique of process exhaust pipe of engine muffler surface corrosion spot according to claim 1, it is characterized in that, described solidification temperature is set to 300 DEG C, and the temperature of regelate is set to 250 DEG C.
3. the technique of process exhaust pipe of engine muffler surface corrosion spot according to claim 1 and 2, is characterized in that, the coating method that described zinc-chromium coating is coated in mobile muffler adopts spraying or dip-coating; Teflon coating adopts dip-coating.
4. the technique of process exhaust pipe of engine muffler surface corrosion spot according to claim 3, it is characterized in that, be provided with humidity sensor in described heating furnace, humidity sensor is connected with controller, and controller is connected to the switch of heating furnace.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510456074.0A CN104959289A (en) | 2015-07-30 | 2015-07-30 | Technology for processing corrosion marks on surface of silencer of engine exhaust pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510456074.0A CN104959289A (en) | 2015-07-30 | 2015-07-30 | Technology for processing corrosion marks on surface of silencer of engine exhaust pipe |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104959289A true CN104959289A (en) | 2015-10-07 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510456074.0A Pending CN104959289A (en) | 2015-07-30 | 2015-07-30 | Technology for processing corrosion marks on surface of silencer of engine exhaust pipe |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105436055A (en) * | 2015-12-31 | 2016-03-30 | 重庆隆鑫机车有限公司 | Silencer coating method |
-
2015
- 2015-07-30 CN CN201510456074.0A patent/CN104959289A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105436055A (en) * | 2015-12-31 | 2016-03-30 | 重庆隆鑫机车有限公司 | Silencer coating method |
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| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20151007 |
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| WD01 | Invention patent application deemed withdrawn after publication |