CN201915157U - Protection layer of outdoor steel parts - Google Patents
Protection layer of outdoor steel parts Download PDFInfo
- Publication number
- CN201915157U CN201915157U CN2010205984593U CN201020598459U CN201915157U CN 201915157 U CN201915157 U CN 201915157U CN 2010205984593 U CN2010205984593 U CN 2010205984593U CN 201020598459 U CN201020598459 U CN 201020598459U CN 201915157 U CN201915157 U CN 201915157U
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- CN
- China
- Prior art keywords
- zinc
- steel parts
- tin alloy
- outdoor
- protection layer
- 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.)
- Expired - Lifetime
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Abstract
The utility model aims at providing a protection layer of outdoor steel parts, which comprises a zinc-tin alloy plating layer and a passivation film, wherein the zinc-tin alloy plating layer covers on the surfaces of steel parts in a plating way, the passivation film is attached on the zinc-tin alloy plating layer, and the zinc-tin alloy plating layer and the passivation film form a composite body which is used as the protection layer of the outdoor steel parts. The protection layer of the outdoor steel parts has high corrosion resistance and high welding performance, so that the steel with the protection layer is more suitable for outdoor operation in different environments.
Description
Technical field
The utility model belongs to field of metal surface treatment, is specifically related to a kind of protective layer of outdoor steel parts.
Background technology
Along with the Economic development of modern society, a large amount of ferrous materials is applied to the various construction fields and the production field of society.No matter be to be used in outdoor facilities, on electric power tower, communication tower, still be used in various outdoor products, on automobile case, steel all must be in the face of protection question out of doors.
Usually people select cadmium, zinc or the tin coating protective layer as steel, and they have relative merits separately.For the steel parts, cadmium coater has higher barrier propterty in oceanic climate and seawater, but lower to the resistivity of chemical substance, and price height, the toxicity of cadmium are big, and application is restricted.Zinc coating belongs to anodic coating, in inland and oceanic climate, has solidity to corrosion preferably, but in industrial environment that contains sulfurous gas or tropical climate, solidity to corrosion will descend to some extent.Tin coating is a cathodic electrodeposition coating to steel part, can be converted into anodic coating in organic medium, has solidity to corrosion preferably, during still as cathodic electrodeposition coating, because the coating hole is many, by the perishable matrix of pin hole, corrosion resisting property is descended.
People began to select for use the protective layer of alloy layer as iron and steel afterwards.Though zinc-nickel, zinc-iron alloy have erosion resistance preferably, weldability is not enough, is difficult to widespread use out of doors.If only with the protective layer of one deck alloy coating as steel, alloy layer also can comparatively fast be corroded, be unfavorable for the permanent protection of outdoor steel parts.
Summary of the invention
The utility model purpose is to provide a kind of protective layer of outdoor steel parts, has both had the high anti-corrosion energy, also has high welding performance, makes the steel that have this protective layer be applicable to the outdoor study in different bad borders more.
The technical solution of the utility model is as follows: a kind of protective layer of outdoor steel parts comprises Zinc-tin alloy coating and passive film.Zinc-tin alloy coating covers the steel parts surface by plating, and passive film is attached on the Zinc-tin alloy coating.Zinc-tin alloy coating and passive film form a complex body together, as the protective layer of outdoor steel parts.
Described Zinc-tin alloy thickness of coating is 5～8 μ m, and alloying constituent 70% is a tin, and 30% is zinc.
Described passivation film thickness is 150～500nm, by alkali formula chromium sesquioxide, chromium+oxalic acid compound (Cr (C204) is 4Cl (H20)), formations such as Co, Zn.
The beneficial effects of the utility model are: protective layer is combined by Zinc-tin alloy coating, passive film and sealer coat has extremely strong solidity to corrosion, and neutral salt spray test can be up to not going out red rust more than 1000 hours; Zinc-tin coating is very soft, carries out still having good solidity to corrosion after the secondary processing; It is good that Zinc-tin alloy is electroplated covering power, is beneficial to the protective treatment of tubulose steel parts; Zinc-tin alloy coating welding property is good, makes things convenient for the solder bond of steel parts; Zinc-tin alloy coating has the performance that is equal to cadmium coater but environment-protecting asepsis can replace cadmium coater.Above-mentioned effect makes the steel with protective layer have wider range of application out of doors.
Description of drawings
Accompanying drawing is a structural representation of the present utility model.Wherein, 1 is the steel parts, and 2 is Zinc-tin alloy coating, and 3 is passive film.
Embodiment
Be described further below in conjunction with the embodiment of accompanying drawing the utility model patent:
As shown in the figure, in the utility model patent, steel parts (1) two sides all is attached with composite armor.Composite armor comprises Zinc-tin alloy coating (2) and passive film (3).Attached to steel parts (1) surface, composition is a zinc about 30% to Zinc-tin alloy coating (2) with neutral electroplating technology, and tin about 70%, thickness are 5～8 μ m.Passive film (3) is by alkali formula chromium sesquioxide, chromium+oxalic acid complex compound (Cr (C
2O
4) (H
2O)
4Cl), elements such as Co, Zn constitute, thickness is 150～500nm, is that Zinc-tin alloy coating (2) forms after the trivalent chromium colorful passivation.
The outdoor steel parts protective layer that the utility model provides, outward appearance is silvery white, similar stainless steel appearance color, bright, careful, soft, general steel surface is handled has higher corrosion resisting property, and all have good solidity to corrosion and weldability under different weathers, splendid anti-red rust performance is arranged, neutral salt spray test can be up to 1000 hours.
Claims (3)
1. the protective layer of outdoor steel parts comprises Zinc-tin alloy coating and passive film, it is characterized in that: Zinc-tin alloy coating covers steel parts matrix surface by plating, and passive film is attached on the Zinc-tin alloy coating.
2. the protective layer of a kind of outdoor steel parts according to claim 1 is characterized in that: the Zinc-tin alloy thickness of coating is 5～8 μ m.
3. the protective layer of a kind of outdoor steel parts according to claim 1 is characterized in that: passivation film thickness is 150～500nm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205984593U CN201915157U (en) | 2010-11-09 | 2010-11-09 | Protection layer of outdoor steel parts |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205984593U CN201915157U (en) | 2010-11-09 | 2010-11-09 | Protection layer of outdoor steel parts |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201915157U true CN201915157U (en) | 2011-08-03 |
Family
ID=44414965
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010205984593U Expired - Lifetime CN201915157U (en) | 2010-11-09 | 2010-11-09 | Protection layer of outdoor steel parts |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201915157U (en) |
-
2010
- 2010-11-09 CN CN2010205984593U patent/CN201915157U/en not_active Expired - Lifetime
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP03 | "change of name, title or address" |
Address after: 510000 105, No. 2, Tianyuan East Road, Yonghe Economic Zone, Huangpu District, Guangzhou City, Guangdong Province Patentee after: Guangdong Dazhi Chemical Technology Co.,Ltd. Address before: 911-912, room 2, Tian An hi tech industrial building, 730 Yingbin Road, Guangzhou, Guangdong, Panyu District 511400, China Patentee before: GUANGZHOU HKS SURFACE TREATMENT Co.,Ltd. |
|
| CP03 | "change of name, title or address" | ||
| CX01 | Expiry of patent term |
Granted publication date: 20110803 |
|
| CX01 | Expiry of patent term |