CN104648126A - Cold-rolled plate fuel tank - Google Patents
Cold-rolled plate fuel tank Download PDFInfo
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- CN104648126A CN104648126A CN201310590081.0A CN201310590081A CN104648126A CN 104648126 A CN104648126 A CN 104648126A CN 201310590081 A CN201310590081 A CN 201310590081A CN 104648126 A CN104648126 A CN 104648126A
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- fuel tank
- cold
- wall
- rolled plate
- corrosion
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Abstract
The invention provides a cold-rolled plate fuel tank. An epoxy resin coating layer with a thickness of 4-7 microns is coated on the outer wall of the cold-rolled plate fuel tank; and a passive film with a thickness of 3-6 microns and formed through a chromate reaction is arranged on the inner wall. The epoxy resin coating layer can improve the corrosion resistance of the outer layer of the cold-rolled plate fuel tank, and the salt spray resistant test reaches above 1000 hours; and the passive film formed through the chromate reaction forms an isolation layer with excellent adhesive force on a metal surface for restraining the hydrogen evolution and oxygen uptake corrosion to protect a base metal from being not corroded by water and other mediums, and the salt spray resistant test reaches above 500 hours. As corrosion resistant paint is sprayed on the outer wall of the fuel tank, and the passive film is coated on the inner wall, the outer wall and an inner cavity of the vehicle fuel tank can achieve standard industry corrosion resistant requirements. Compared with a galvanized plate and lead-plated plate vehicle fuel tank, the cold-rolled plate vehicle fuel tank has the advantages of large reduction of costs, no leakage of welded parts, good corrosion resistant effect and broad market prospect.
Description
Technical field
The present invention relates to fuel tank of vehicle, specifically a kind of cold-reduced sheet fuel tank.
Background technology
Galvanized plate and long ternes fuel tank use extensively in auto trade, but it exists expensive and problem that the is easy seepage in weld.
The base material adopting cold-reduced sheet to make fuel tank of vehicle can reduce its cost and improve its welded seal, but cooling water expansion tank during welding may enter fuel tank inner chamber in a large number, produces liberation of hydrogen and oxygen uptake corrosion, fuel tank inner chamber is got rusty.Meanwhile, fuel tank of vehicle applying working condition is often poor, may face more severe environment for use, and the protection of this outside face to fuel tank proposes high requirement.
Summary of the invention
The present invention is in order to overcome the deficiency of the existing aseptic technic of cold-reduced sheet fuel tank of vehicle, and spy proposes a kind of cold-reduced sheet fuel tank.
Technical scheme of the present invention is for this reason, and a kind of cold-reduced sheet fuel tank, comprises cold-reduced sheet fuel tank, it is characterized in that: be coated with epoxy coating at the outer wall of cold-reduced sheet fuel tank, its inwall has the passivating film formed by chromate reaction.
The improvement of such scheme is: the thickness of epoxy coating is 4 ~ 7 μm; The thickness of passivating film is 3 ~ 6 μm.
Beneficial effect:
Epoxy resin coating of the present invention can improve the outer field antiseptic power of cold-reduced sheet fuel tank, and salt-fog resistant test reaches more than 1000 hours; The passivating film of chromate reaction formation forms the good isolation layer of adhesive ability in metal surface, can suppress liberation of hydrogen and oxygen uptake corrosion, protection parent metal is not by the corrosion of water with other media, and salt-fog resistant test reaches more than 500 hours.
By the passivating film on fuel tank outer wall anticorrosion with painting coating and inwall, vehicle fuel box outer wall and inner chamber is enable to reach the requirement for anticorrosion of professional standard.Relative galvanized plate and long ternes fuel tank of vehicle, cold-reduced sheet fuel tank of vehicle cost significantly reduces, weld is non-leakage, favorable anti-corrosion effect, wide market.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention.
In figure, 1 is cold-reduced sheet fuel tank, and 2 is epoxy coatings, and 3 is passivating films.
Detailed description of the invention
The present invention as shown in Figure 1.
A kind of cold-reduced sheet fuel tank, comprises cold-reduced sheet fuel tank 1, is coated with epoxy coating 2 at the outer wall of cold-reduced sheet fuel tank 1, and its inwall forms passivating film 3 by chromate reaction.
The thickness of epoxy coating 2 is 4 ~ 7 μm; The thickness of passivating film 3 is 3 ~ 6 μm.
Epoxy coating 2 on outer wall adopts electrostatic spraying application epoxy powder coating, and inwall adopts roller painting that cold-reduced sheet and chromate are reacted and forms chemical composition coating i.e. passivating film 3.
Epoxy coating can improve the outer field antiseptic power of cold-reduced sheet fuel tank, and salt-fog resistant test reaches more than 1000 hours; Form passivating film 3 and can suppress liberation of hydrogen and oxygen uptake corrosion, salt-fog resistant test reaches more than 500 hours.
the chemical nature of chromate passivation film
The main component of chromate passivation film is zinc chromate (ZnCrO4) and chromic acid chromium (CrO3Cr2O3nH2O).Maximum with 3 valency chromium in passivating film, be secondly water, be thirdly 6 valency chromium, be present in Several Thiourea Derivatives on Zinc Plate Surface with the colloidal material form of chromic acid chromium.Zinc chromate is attached in tunicle, and it can be water-soluble, is objectionable constituent, answers rinsed clean.Because a large amount of 3 valency chromium compoundses in passivating film are insoluble in water, completely cut off the infiltration of oxygen in air and moisture, enclosed the hole (especially electro-galvanized layer) of zinc coating.6 a small amount of valency chromium are distributed in film, can play repair to by the passivating film wiped, and make the tunicle that slightly tears again complete.
Claims (2)
1. a cold-reduced sheet fuel tank, comprises cold-reduced sheet fuel tank, it is characterized in that: be coated with epoxy coating at the outer wall of cold-reduced sheet fuel tank of vehicle, its inwall has the passivating film formed by chromate reaction.
2. a kind of cold-reduced sheet fuel tank according to claim 1, is characterized in that: the thickness of epoxy coating is 4 ~ 7 μm; The thickness of passivating film is 3 ~ 6 μm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310590081.0A CN104648126A (en) | 2013-11-22 | 2013-11-22 | Cold-rolled plate fuel tank |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310590081.0A CN104648126A (en) | 2013-11-22 | 2013-11-22 | Cold-rolled plate fuel tank |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104648126A true CN104648126A (en) | 2015-05-27 |
Family
ID=53239952
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310590081.0A Pending CN104648126A (en) | 2013-11-22 | 2013-11-22 | Cold-rolled plate fuel tank |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104648126A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115107504A (en) * | 2021-03-23 | 2022-09-27 | 本田技研工业株式会社 | Fuel cell vehicle |
-
2013
- 2013-11-22 CN CN201310590081.0A patent/CN104648126A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115107504A (en) * | 2021-03-23 | 2022-09-27 | 本田技研工业株式会社 | Fuel cell vehicle |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20150527 |
|
| WD01 | Invention patent application deemed withdrawn after publication |