CN105420653B - One kind is used for bridge Steel Wire Surface hot dip galvanizing Al Mg alloy-layers and preparation method thereof - Google Patents
One kind is used for bridge Steel Wire Surface hot dip galvanizing Al Mg alloy-layers and preparation method thereof Download PDFInfo
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- CN105420653B CN105420653B CN201510867922.7A CN201510867922A CN105420653B CN 105420653 B CN105420653 B CN 105420653B CN 201510867922 A CN201510867922 A CN 201510867922A CN 105420653 B CN105420653 B CN 105420653B
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- 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
- C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
- C23C2/04—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor characterised by the coating material
- C23C2/06—Zinc or cadmium or alloys based thereon
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C18/00—Alloys based on zinc
- C22C18/04—Alloys based on zinc with aluminium as the next major constituent
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C21/00—Alloys based on aluminium
- C22C21/10—Alloys based on aluminium with zinc as the next major constituent
-
- 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
- C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
- C23C2/04—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor characterised by the coating material
- C23C2/12—Aluminium or alloys based thereon
-
- 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
- C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
- C23C2/26—After-treatment
- C23C2/28—Thermal after-treatment, e.g. treatment in oil bath
-
- 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
- C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
- C23C2/34—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor characterised by the shape of the material to be treated
- C23C2/36—Elongated material
- C23C2/38—Wires; Tubes
Abstract
It is used for bridge Steel Wire Surface hot dip galvanizing Al Mg alloy-layers and preparation method thereof the present invention relates to one kind, the component of the alloy-layer be Zn 30 97% by mass percentage, Al 5 60%, Mg 0.02 11%, summation satisfaction 100%.Preparation method includes：Degreasing and rust removal processing is carried out to bridge steel wire；Alloy for hot-dip layer；Stabilization processes.The alloy layer of the present invention, corrosion resistance is better than current zinc coating and zinc aluminum alloy coating, easy to implement, meets particular surroundings, as, to the needs of bridge steel wire, having wide market prospects under marine corrosion atmosphere.
Description
Technical field
It is more particularly to a kind of to be used for bridge Steel Wire Surface hot-dip the invention belongs to steel wire coating and preparation method thereof field
Zn-Al-Mg alloy-layers and preparation method thereof.
Background technology
With the rapid development of bridge construction technology, bridge construction design across footpath is constantly increasing, and has unique advantage
The application of suspension bridge is more extensive.The increase of across footpath and the complexity for building environment, to the main bearing carrier " main push-towing rope " of suspension bridge
Intensity and corrosion resistance propose higher requirement.The main coating of bridge steel wire is zinc layers at present.By or immersion,
The uniform zinc coating of outer layer hot-dip last layer of wire rod, certain protective role is played to matrix.Due to zinc layers porosity compared with
Height causes corrosion resistance relatively low, and in many fields, zinc coating is replaced by allumen layer.But zinc-aluminum alloy coating into
Dividing largely is influenceed by silk material preparation technology and causes adjusting range narrower, as zinc aluminium false alloy coating, although its
Composition can adjust in relative broad range, due to only including two kinds of elements of Zn and Al, its corrosion product to the hole in coating from
Though sealing process increases compared to pure spelter coating, effect is limited.
The content of the invention
The technical problems to be solved by the invention are to provide one kind and are used for bridge Steel Wire Surface hot dip galvanizing-Al-Mg alloys
Layer and preparation method thereof, the alloy-layer has the characteristics that porosity is low, corrosion resisting property is good, application prospect is extensive.
One kind of the present invention is used for bridge Steel Wire Surface hot dip galvanizing-Al-Mg alloy-layers, and the composition of the alloy-layer presses matter
Amount percentage is Zn 30-97%, Al 5-60%, Mg 0.02-11%, and summation meets 100%.
Quality in the alloy-layer unit area is 120-410g/m2。
Quality in the alloy-layer unit area is 190~350g/m2。
Quality in the alloy-layer unit area is 210g/m2。
Quality in the alloy-layer unit area is 320g/m2。
The corrosion potential E of the alloy-layercoorFor -1.05~-1.10V, IcoorFor 1~5 × 10-6A·cm-2。
The polarization resistance of the alloy-layer is 5000~8000 Ω cm2。
A kind of preparation method for bridge Steel Wire Surface hot dip galvanizing-Al-Mg alloy-layers of the present invention, including：
(1) enter surface row degreasing and rust removal processing to bridge steel wire, ensure the smooth homogeneous of plating surface；
(2) hot dip galvanizing-Al-Mg alloy-layers at 520-580 DEG C, homogeneous Zn-Al-Mg alloys are obtained in Steel Wire Surface
Coating；Wherein, the composition of alloy-layer is Zn 30-97%, Al 5-60%, Mg 0.02-11% by mass percentage, and summation is full
Foot 100%；Wherein, the time of hot-dip is 30~60s；
(3) stabilization processes are carried out after hot-dip terminates, processing parameter includes：Stabilization processes tension force：25%~45%
Nominal Fracture Force；Stabilization processes temperature：360 DEG C~420 DEG C.
The temperature of hot-dip is 560 DEG C in the step (2), and the hot-dip time is 60s.
Hot-dip treatment process impacts to the intensity and toughness of raw steel silk, therefore design is stable together after hot-dip
Change handling process, its principle is to carry out lonneal processing to steel wire while tension force is applied to steel wire, improves the strong of steel wire
Degree and toughness.
Finally carry out inspection of coating：Deposit appearance is smooth, and color is uniform, and thickness is homogeneous, is detected using nondestructive detecting instrument
Thickness of coating, thickness and the qualified product of surface quality enter Packaging Shipping Procedures.
The composition of alloy for hot-dip (is improved, in traditional galvanizing by dipping system by improved hot-dip handling process
Middle involvement Al, Mg element, the strict composition for controlling molten bath alloy and ratio are within the specific limits.Simultaneously according to coating alloy into
Point, hot-dip temperature is finely adjusted, temperature range is 520-580 DEG C, and preferable temperature is 560 DEG C, and the hot-dip time suitably prolongs
Grow to 60s.), uniform, fine and close Zn-Al-Mg alloy-layers are obtained in Steel Wire Surface, rich Al- be present in the institutional framework of its coating
Mg alloys phase, rich Zn-Al alloy phase and few Zn-Al-Mg alloy phases, rich Al-Mg alloys phase and rich Zn-Al alloy alternate and deposited
The sacrificing protection effect for having played Zn-Al alloy phase and the passivation protection of Al-Mg alloy phases is being cooperateed with to act on, the Al- in coating
Mg alloys mutually form netted hard framework, can play a part of preventing Zn-Al alloy from corroding.Due to Mg addition, Mg and Al shapes
Into Al-Mg hydroxide films in addition to playing a part of passivating film, after corrosion also generation there is self sealing capability accordingly
Corrosion product, block the defects of coating together with Zn corrosion product, form finer and close corrosion scales, strengthen
The self-enclosed effect of coating so that corrosion resisting property of the coating in the corrosion later stage greatly improves.
The effect of each element is added in zinc coating：
Al：Improve alloy casting character, increase alloy flowability, crystal grain thinning, promote solution strengthening, improve coating machinery
Performance；Zn is reduced to the respond of iron, reduces the erosion to ferrous material；Aluminium content control is 5.8~8.3% (because adding
Other elements are entered, have there is certain influence on overall flow).It is mainly in view of required intensity and mobility, good fluidity
It is condition necessary to obtain the casting that one complete, accurate size, surface are smooth.
Mg：Reduce intercrystalline corrosion；Refining alloy tissue, so as to increase the intensity of alloy；Improve the wear resistance of alloy.
It is smooth homogeneous in bridge Steel Wire Surface processing last layer by rationally controlling alloy layer composition and or immersion
Zn-Al-Mg alloy layers, to substitute the conventional zinc coat of bridge steel wire.Relative to zinc coat, Zn-Al-Mg alloy layers
Porosity is lower, and corrosion resistance is higher, can adapt to more complicated and harsh climate environment.Al and Mg addition, promote conjunction
Crystal grain refinement inside layer gold, it is therefore prevented that the appearance of intercrystalline corrosion, improve the intensity of coating.One is designed after hot-dip simultaneously
Road stabilizing treatment technique, reduce influence of the or immersion to former intensity of steel wire and toughness, maintain steel wire superhigh intensity,
Underrelaxation characteristic.Alloy layer provided by the invention, its corrosion resistance are better than current zinc coating and zinc aluminum alloy coating, are easy to real
Apply, meet particular surroundings, as, to the needs of bridge steel wire, there are wide market prospects under marine corrosion atmosphere.
The present invention adds micro- Mg by improving Zn-Al alloy or immersion, the processing of bridge Steel Wire Surface
Last layer Zn-Al-Mg multi-elements alloying coatings, have adjusted the structure and composition of coating, improve the corrosion resisting property of coating.Exist simultaneously
After hot-dip, one of stabilization process is designed, is reduced because or immersion influences to caused by bridge intensity of steel wire and toughness.
Beneficial effect
The Zn-Al-Mg alloy-layers of the present invention, corrosion resistance is better than current zinc coating and zinc aluminum alloy coating, easy to implement,
Particular surroundings is met, as, to the needs of bridge steel wire, there are wide market prospects under marine corrosion atmosphere.
Embodiment
With reference to specific embodiment, the present invention is expanded on further.It should be understood that these embodiments are merely to illustrate the present invention
Rather than limitation the scope of the present invention.In addition, it is to be understood that after the content of the invention lectured has been read, people in the art
Member can make various changes or modifications to the present invention, and these equivalent form of values equally fall within the application appended claims and limited
Scope.
Coating performance method of testing is as follows in the present patent application：
1. bond strength is tested.Bond strength test experiments using CSS-44100 electronic universal testers measure coating with
The resisting binding strength of matrix.
2. neutral salt spray test
In ATLAS CCX2000 salt fog cabinets couple the accelerated corrosion tests of sample, salt mist experiment is according to GB-
T10125-1997 standards are carried out, experiment condition：In (50 ± 5) g/L neutral NaCl watery solutions of preparation, experimental temperature control exists
(35 ± 1) DEG C carry out continuous salt fog.Sample is placed in room temperature first and places 48h, is in by sample and vertical direction respectively afterwards
20 ° are positioned on salt fog box bracket, exposure 5,15,30 and more than 30 days after sampling (when determining subsequent experimental according to actual conditions
Between).After salt mist experiment, the deposition salt of surface attachment is washed with deionized water, after cold wind drying, carries out surface corrosion State Viewpoint
Survey.
3. electrochemical property test
The electro-chemical test of alloy layer uses CHI660 electrochemical workstations, and coating is prepared into 1 × 1cm electrodes, adopted
With three-electrode system, reference electrode is saturated calomel electrode, is platinum electrode to electrode, and working electrode is coating sample.Corrosion is situated between
Matter is 3.5%NaCl solution, and sample soaks 30min in the solution before test, is measured again after current potential is stable.
Embodiment 1
(1) Steel Wire Surface is handled
Steel Wire Surface is handled before hot-dip, goes out the impurity such as degreasing, oxide.
(2) hot dipping plating
By strictly controlling hot-dip temperature (560 DEG C) and hot-dip time 50s, homogeneous Zn- is obtained in Steel Wire Surface
Al-Mg alloy layers.
Coating composition：Zn 85%；Al 14.5%, Mg0.5%
Quality of coating：210g/m2
Coating performance is tested：
Adhesive force is tested：16MPa；
Corrosion potential (Ecorr) -1.10V, steel wire can be played a good protection, corrosion current (Icorr)1.0
×10-6A·cm-2, corrosion rate is slow, has good corrosion resistance.
Resistance to red rust time (neutral salt spray test) ＞ 10000 hours.
Embodiment 2
(1) Steel Wire Surface is handled
Steel Wire Surface is handled before hot-dip, goes out the impurity such as degreasing, oxide.
(2) hot dipping plating
By strictly controlling hot-dip temperature (530 DEG C) and hot-dip time 50s, homogeneous Zn- is obtained in Steel Wire Surface
Al-Mg alloy layers.
Coating composition：Zn 75%；Al 22.8%, Mg 2.2%
Quality of coating：210g/m2
Coating performance is tested：
Adhesive force is tested：15.8MPa；
Corrosion potential (Ecorr) -1.07V, steel wire can be played a good protection, corrosion current (Icorr)1.2
×10-6A.cm-2, corrosion rate is slow, has good corrosion resistance.
Resistance to red rust time (neutral salt spray test) ＞ 10000 hours.
Embodiment 3
(1) Steel Wire Surface is handled
Steel Wire Surface is handled before hot-dip, goes out the impurity such as degreasing, oxide.
(2) hot dipping plating
By strictly controlling hot-dip temperature (560 DEG C) and hot-dip time 30s, homogeneous Zn- is obtained in Steel Wire Surface
Al-Mg alloy layers.
Coating composition：Zn 62%；Al 35%, Mg 3%
Quality of coating：210g/m2
Coating performance is tested：
Adhesive force is tested：14.7MPa；
Resistance to red rust time (neutral salt spray test) ＞ 10000 hours.
Embodiment 4
(1) Steel Wire Surface is handled
Steel Wire Surface is handled before hot-dip, goes out the impurity such as degreasing, oxide.
(2) hot dipping plating
By strictly controlling hot-dip temperature (520) and hot-dip time 60s, homogeneous Zn-Al- is obtained in Steel Wire Surface
Mg alloy layers.
Coating composition：Zn 53%；Al 42.4%, Mg 4.6%
Quality of coating：210g/m2
Coating performance is tested：
Adhesive force is tested：16.2MPa；
Corrosion potential (Ecorr) -1.15v, steel wire can be played a good protection, corrosion current (Icorr)1.0
×10-5A.cm-2, corrosion rate is slow, has good corrosion resistance.
Resistance to red rust time (neutral salt spray test) ＞ 10000 hours.
Embodiment 5
(1) Steel Wire Surface is handled
Steel Wire Surface is handled before hot-dip, goes out the impurity such as degreasing, oxide.
(2) hot dipping plating
By strictly controlling hot-dip temperature (560 DEG C) and hot-dip time 60s, homogeneous Zn- is obtained in Steel Wire Surface
Al-Mg alloy layers.
Coating composition：Zn 41.3%；Al 56.5%, Mg 2.2%
Quality of coating：210g/m2
Coating performance is tested：
Adhesive force is tested：15.2MPa；
Resistance to red rust time (neutral salt spray test) ＞ 10000 hours.
Embodiment proves the alloy layer of the invention prepared relative to traditional zinc coat, and its corrosion resistance has very big carry
Height, and preparation flow is easy, suitable for industrial production, and has wide market application foreground.
Claims (4)
1. one kind is used for bridge Steel Wire Surface hot dip galvanizing-Al-Mg alloy-layers, it is characterised in that the composition of the alloy-layer is pressed
Mass percent is Zn 75%, Al 22.8%, Mg 2.2%.
2. one kind according to claim 1 is used for bridge Steel Wire Surface hot dip galvanizing-Al-Mg alloy-layers, it is characterised in that
The corrosion potential E of the alloy-layercoorFor -1.07V, IcoorFor 1.2 × 10-6A·cm-2。
3. one kind according to claim 1 is used for bridge Steel Wire Surface hot dip galvanizing-Al-Mg alloy-layers, it is characterised in that
The polarization resistance of the alloy-layer is 5000~8000 Ω cm2。
4. a kind of preparation method as claimed in claim 1 for being used for bridge Steel Wire Surface hot dip galvanizing-Al-Mg alloy-layers, bag
Include：
(1) degreasing and rust removal processing is carried out to bridge Steel Wire Surface；
(2) hot dip galvanizing-Al-Mg alloy-layers；Wherein, the temperature of hot-dip is 560 DEG C, and the time of hot-dip is 60s；
(3) stabilization processes are carried out after hot-dip terminates, processing parameter includes：Stabilization processes tension force：25%~45% nominal
Fracture Force；Stabilization processes temperature：360 DEG C~420 DEG C.
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| CN201510867922.7A CN105420653B (en) | 2015-12-01 | 2015-12-01 | One kind is used for bridge Steel Wire Surface hot dip galvanizing Al Mg alloy-layers and preparation method thereof |
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| CN201510867922.7A CN105420653B (en) | 2015-12-01 | 2015-12-01 | One kind is used for bridge Steel Wire Surface hot dip galvanizing Al Mg alloy-layers and preparation method thereof |
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| CN105420653B true CN105420653B (en) | 2018-03-23 |
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106521385A (en) * | 2016-11-22 | 2017-03-22 | 常州大学 | Two-step SuperDyma alloy hot dipping technology for structural steel |
| CN107058828A (en) * | 2017-06-27 | 2017-08-18 | 桂林理工大学 | With high intensity, high tenacity, the high Zn content deformation Al Zn alloys of low cost and preparation method |
| CN108239735A (en) * | 2018-01-16 | 2018-07-03 | 江苏法尔胜缆索有限公司 | High tough, permanent seal cooling bridge cable 1960MPa grades of Zn-Al Alloy Coated Steel Wires of major diameter |
| CN108359924A (en) * | 2018-04-10 | 2018-08-03 | 上海大学 | A kind of dip galvanized aluminum magnesium super-high strength steel and its preparation method and application |
| CN109944104A (en) * | 2019-04-25 | 2019-06-28 | 无锡市华锋车业部件有限公司 | A kind of manipulation wirerope and preparation method thereof |
| CN110218959A (en) * | 2019-05-07 | 2019-09-10 | 江苏东纲金属制品有限公司 | A kind of bridge cable high corrosion-resistant Zn90-Al10-Mg Alloy Coating Steel Wire |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3505043A (en) * | 1969-01-08 | 1970-04-07 | Inland Steel Co | Al-mg-zn alloy coated ferrous metal sheet |
| CN101405421A (en) * | 2006-03-20 | 2009-04-08 | 新日本制铁株式会社 | Highly corrosion-resistant hot dip galvanized steel stock |
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2015
- 2015-12-01 CN CN201510867922.7A patent/CN105420653B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3505043A (en) * | 1969-01-08 | 1970-04-07 | Inland Steel Co | Al-mg-zn alloy coated ferrous metal sheet |
| CN101405421A (en) * | 2006-03-20 | 2009-04-08 | 新日本制铁株式会社 | Highly corrosion-resistant hot dip galvanized steel stock |
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