CN104109828A - Hot-dip galvanized alloy plating for electric transmission line overhead ground wire and preparing process thereof - Google Patents
Hot-dip galvanized alloy plating for electric transmission line overhead ground wire and preparing process thereof Download PDFInfo
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Abstract
The invention relates to a hot-dip galvanized alloy plating for an electric transmission line overhead ground wire and a preparing process thereof. The plating and the process are characterized in that: the alloy plating is prepared from components by weight comprising 3-8% of aluminum, 0.01-3% of nickel and 0.02-3% of rare earth, with the balance being zinc; the plating prepared by acid water washing, aiding electroplating, hot-dip galvanizing and cooling can effectively prolong the anticorrosion lifetime of the hot-dip plating of the electric transmission line overhead ground wire; and the anticorrosion lifetime is prolonged by more than 2 times than industrial hot-dip galvanized platings at the same time of not increasing the thickness of the plating.
Description
[technical field]
The present invention relates to into a kind of hot dip process technology, specifically relate to a kind of power transmission line overhead ground wire galvanizing alloy layer and preparation technology thereof.
[background technology]
The loss that the corrosion failure of iron and steel brings is huge, have data to show, Jin Yi China is that the annual steel corrosion of example loses approximately 5,000 hundred million Renminbi, accounts for 6% of gross national product, as can be seen here, the material that the corrosion of iron and steel causes and the waste of the energy are great.And the overhead ground wire long-term exposure of transmitting line is in atmospheric environment, easily be subject to the corrosion of the acid deep-etching gases such as industrial gaseous waste such as sulfide, oxynitrides, and changing power transmission line overhead ground wire also needs to have a power failure, and the seriousness of financial loss is self-evident.The anti-corrosion measure that transmitting line adopts is at present mainly pot galvanize.This way can improve the corrosion resistance nature of iron and steel and the corrosion resistance nature of overhead ground wire pot galvanize effectively, extends the Years Of Service of transmitting line, reduces steel loss, reduces maintenance and operation cost.
But traditional Aplataer process exposed day by day zinc consumption is large, the shortcomings such as residue cadmia is many, so adopted the method improvement immersion that adds alloying element in zinc liquid at present, when improving corrosion resistance nature, steel surface deposition one deck alloy layer can reduce thickness of coating again, for the anticorrosion life-span of improving hot dip process member, reduce plating solution consumption, economize on resources and energy consumption, reduce discharge, there is extraordinary economic benefit and social benefit.Existing alloy layer has zinc aluminum alloy coating, zn-ni alloy deposits, zinc titanium alloy coating etc., though this measure obtains certain effect at raising coating aspect the anticorrosion life-span, but due to high cost, technology is imperfection still not, so could not obtain large-scale promotion and application.
Therefore, need to research and develop a kind of long-effective corrosion of power transmission line overhead ground wire, technical and better alloy layer of economy of being applicable to.
[summary of the invention]
The object of the invention is in view of the foregoing defects the prior art has, a kind of power transmission line overhead ground wire alloy layer is provided, this alloy layer can effectively improve the hot-dip coated anticorrosion life-span of power industry power transmission line overhead ground wire, can guarantee when not improving thickness of coating, make more industrial hot dipping pure zinc plating of anticorrosion life-span improve more than 2 times.
Another object of the present invention is to, a kind of preparation technology of power transmission line overhead ground wire alloy layer is provided.
The invention provides a kind of alloy layer of power transmission line overhead ground wire, alloy layer comprises that metal plating liquid and the quickening liquid by following component by mass percentage, prepared make:
Metal plating liquid comprises: aluminium 3～8%, nickel 0.01～3%, rare earth 0.02～3%, and surplus is zinc;
Quickening liquid is 300～350 grams of ZnCl
2, 10～15 grams of NaCl, 20～25 grams of NaF and 1 premium on currency be prepared from.
Alloy layer provided by the invention is prepared from by following component by weight percentage:
Aluminium 5～8%, nickel 0.01～1%, rare earth 0.05～2% surplus are zinc.
Alloy layer provided by the invention is prepared from by following component by weight percentage:
Aluminium 5～6%, nickel 0.02～2%, rare earth 0.2～3%, surplus is zinc.
Any one that alloy layer middle-weight rare earths Wei provided by the invention selects Cong Lanthanum, cerium, yttrium, gadolinium and neodymium or multiple combination, more excellent while selecting as lanthanum and/or cerium.
The present invention also provides a kind of preparation technology of alloy layer, comprises the following steps:
1) acid washing plating piece
5～10 minutes after washings of the hydrochloric acid plating piece that is 10～20% by concentration washing;
2) help plating to process
In 30～90 ℃ to step 1) process the plating piece obtain and in quickening liquid, help plating 10～30 seconds;
3) hot dip process
Alloy layer component provided by the invention is mixed, at 465～475 ℃, metal plating liquid is prepared in melting, by through step 2) plating piece processed is in drying 10～30s at 120～150 ℃ to cooling from aluminium alloy proposition after immersion plating 20～50s in described alloy electroplating bath after this plating piece surface whiting.
In preparation technology provided by the invention, quickening liquid is 320～350 grams of ZnCl
2, 10～15 grams of NaCl, 20～25 grams of NaF and 1 premium on currency be prepared from.
Step of preparation process 2 provided by the invention) in, helping plating temperature is 80 ℃, and helping the plating time is 20s.
In preparation technology provided by the invention, the container of hot dip process adopts ceramic zinc boiler.
Each alloy element action mechanism that the present invention adopts is as follows:
Zinc: the main alloying constituent of alloy layer, conduct corrosion anode in the process of corrosion, by sacrificing self with protection electric power line pole tower matrix metal; Aluminium: micro alloying element, aluminium element can form intermetallic compound with zinc in this content range, form the medium that adheres to coating, make the Adhesion enhancement of coating, and in alloy layer crystal growing process, can form aluminum oxide film protection alloy layer at coating surface, improve the corrosion fatigue life of whole coating; Magnesium: microalloy element, magnesium elements can improve coating corrosion resistance nature in this content range.
Nickel: microalloy element, in Zn bathes, add Ni and can suppress the Fe/Zn reaction containing Si steel, improve zinc simultaneously and bathe mobility and quality product, nickel in alloy layer surface in damp atmosphere forms fine and close oxide film simultaneously, not only can stop alloy layer to continue oxidized, and energy is alkaline-resisting, the corrosion of salts solution.
Rare earth (La and Ce mishmetal): microalloy element, because rare earth has outstanding chemically reactive and very strong avidity, zinc-aluminium liquation viscosity is greatly reduced, improve zinc liquid mobility, reduce zinc liquid wetting angle and surface tension, improve coating uniformity.And the impurity in plating solution is purified, thereby improved the wetting property to steel matrix.Make alloy layer form the coating that light is complete, surface corrosion-resistant erosion property, plasticity greatly improve and improve.
The purer zinc of corrosion resistance of alloy is stronger, immersion is simple, existing hot-galvanizing equipment can be realized industrial production demand completely, the Huang of usining rust time of occurrence is as alloy layer failure criteria, under the identical condition of thickness of coating, the erosion resistance of alloy layer of the present invention improves 2 times compared with the pure zinc coating of hot dip; Using salt-fog test weightlessness as the corrosion-resistant appraisal standards of alloy layer, and, under the identical condition of thickness of coating, the pure zinc coating of the more industrial hot dip of erosion resistance of alloy layer of the present invention improves 2 times.
Compared with prior art, a kind of power transmission line overhead ground wire alloy layer provided by the invention and preparation technology thereof have the following advantages:
1, alloy layer can effectively improve the hot-dip coated anticorrosion life-span of power industry power transmission line overhead ground wire;
2 and can make power transmission line overhead ground wire under complex corrosion envrionment conditions, there is the long-effective corrosion life-span;
3, can guarantee when not improving thickness of coating, make more industrial hot dipping pure zinc plating of anticorrosion life-span improve 1 times;
4, preparation technology is simple, and cost is low.
The present invention relates to a kind of power transmission line overhead ground wire alloy layer and preparation technology thereof, its feature is that described alloy layer is prepared from by following component by weight percentage: aluminium 3～8%, nickel 0.01～3%, rare earth 0.02～3%, and surplus is zinc; Through acidity washing, process, help plating processing, hot dip process to make.This alloy layer can effectively improve the hot-dip coated anticorrosion life-span of power transmission line overhead ground wire, can guarantee when not improving thickness of coating, makes the pure zinc coating of more industrial hot dip process of anticorrosion life-span improve more than 2 times.
[embodiment]
Below, by embodiment, a kind of power transmission line overhead ground wire alloy layer provided by the invention and preparation technology thereof are done to further more detailed description.
Embodiment 1
The electric power line pole tower alloy layer of the present embodiment, wherein alloy layer is prepared from by following alloy by weight percentage:
Aluminium 5%, nickel 0.03%, lanthanum and cerium mishmetal 0.15%, surplus is zinc.Using salt-fog test weightlessness as the corrosion-resistant appraisal standards of alloy layer, under the identical condition of thickness of coating, by the more industrial hot dipping pure zinc plating of the alloy layer erosion resistance of this weight percent, improve 2.6 times.
The preparation technology of the electric power line pole tower alloy layer of this example, comprises following steps:
1) pickling washing plating piece:
Pickling, pickling time that the hydrochloric acid that employing concentration is 10% carries out before plating piece hot dip process are 20 minutes, after pickling, wash:
2) help plating to process
By step 1) steel wire that obtains is placed in quickening liquid, at 70 ℃ of temperature, helps plating, and helping the plating time is 45 seconds;
3) hot dip process
Above-mentioned component is by weight percentage mixed, melting at 465 ℃ of temperature, obtain alloy electroplating bath, by step 2) steel wire that obtains dries 40s at 130 ℃ of temperature, after specimen surface whiting, immediately plating piece is put into alloy electroplating bath, controlling alloy electroplating bath temperature is under 470 ℃ of conditions, after immersion plating 50s, immediately sample is proposed to aluminium alloy and carries out naturally cooling.
Wherein, step 2) help the preparation of quickening liquid in plating processing: by 350 grams of ZnCl
2, 10 grams of NaCl, 25 grams of NaF add in 1 premium on currency solvent, are uniformly mixed.
The alloying constituent of table 1 plating solution (wt%).
| Zn | Al | Ni | Rare earth element |
| Surplus | 5 | 0.03 | 0.15 |
Embodiment 2
The electric power line pole tower alloy layer of the present embodiment, wherein alloy layer is prepared from by following alloy by weight percentage:
Aluminium 6%, nickel 0.02%, lanthanum and cerium mishmetal 0.1%, surplus is zinc.Using salt-fog test weightlessness as the corrosion-resistant appraisal standards of alloy layer, under the identical condition of thickness of coating, by the more industrial hot dipping pure zinc plating of the alloy layer erosion resistance of this weight percent, improve 2.8 times.
The preparation technology of the electric power line pole tower alloy layer of this example, comprises following steps:
1) pickling washing plating piece:
Pickling, pickling time that the hydrochloric acid that employing concentration is 15% carries out before plating piece hot dip process are 25 minutes, after pickling, wash:
2) help plating to process
By step 1) plating piece that obtains is placed in quickening liquid, at 80 ℃ of temperature, helps plating, and helping the plating time is 55 seconds;
3) hot dip process
Above-mentioned component is by weight percentage mixed, melting at 470 ℃ of temperature, obtain alloy electroplating bath, by step 2) plating piece that obtains dries 30s at 140 ℃ of temperature, after specimen surface whiting, immediately plating piece is put into alloy electroplating bath, controlling alloy electroplating bath temperature is under 465 ℃ of conditions, after immersion plating 80s, immediately sample is proposed to aluminium alloy and carries out naturally cooling.
Wherein, step 2) help the preparation of quickening liquid in plating processing: by 300 grams of ZnCl
2, 15 grams of NaCl, 20 grams of NaF add in 1 premium on currency solvent, are uniformly mixed.
The alloying constituent of table 2 plating solution (wt%).
| Zn | Al | Ni | Rare earth element |
| Surplus | 6 | 0.02 | 0.1 |
Embodiment 3
The electric power line pole tower alloy layer of the present embodiment, wherein alloy layer is prepared from by following alloy by weight percentage:
Aluminium 3%, nickel 0.05%, lanthanum and cerium mishmetal 0.2%, surplus is zinc.Using salt-fog test weightlessness as the corrosion-resistant appraisal standards of alloy layer, under the identical condition of thickness of coating, by the more industrial hot dipping pure zinc plating of the alloy layer erosion resistance of this weight percent, improve 2.3 times.
The preparation technology of the electric power line pole tower alloy layer of this example, comprises following steps:
1) pickling washing plating piece:
Pickling, pickling time that the hydrochloric acid that employing concentration is 15% carries out before plating piece hot dip process are 30 minutes, after pickling, wash:
2) help plating to process
By step 1) plating piece that obtains is placed in quickening liquid, at 90 ℃ of temperature, helps plating, and helping the plating time is 55 seconds;
3) hot dip process
Above-mentioned component is by weight percentage mixed, melting at 470 ℃ of temperature, obtain alloy electroplating bath, by step 2) plating piece that obtains dries 35s at 140 ℃ of temperature, after specimen surface whiting, immediately plating piece is put into alloy electroplating bath, controlling alloy electroplating bath temperature is under 470 ℃ of conditions, after immersion plating 60s, immediately sample is proposed to aluminium alloy and carries out naturally cooling.
Wherein, step 2) help the preparation of quickening liquid in plating processing: by 320 grams of ZnCl
2, 12 grams of NaCl, 22 grams of NaF add in 1 premium on currency solvent, are uniformly mixed.
The alloying constituent of table 3 plating solution (wt%).
| Zn | Al | Ni | Rare earth element |
| Surplus | 3 | 0.05 | 0.2 |
Embodiment 4
The electric power line pole tower alloy layer of the present embodiment, wherein alloy layer is prepared from by following alloy by weight percentage:
Aluminium 8%, nickel 0.05%, lanthanum and cerium mishmetal 0.2%, surplus is zinc.Using salt-fog test weightlessness as the corrosion-resistant appraisal standards of alloy layer, under the identical condition of thickness of coating, by the more industrial hot dipping pure zinc plating of the alloy layer erosion resistance of this weight percent, improve 2.4 times.
The preparation technology of the electric power line pole tower alloy layer of this example, comprises following steps:
1) pickling washing plating piece:
Pickling, pickling time that the hydrochloric acid that employing concentration is 20% carries out before plating piece hot dip process are 15 minutes, after pickling, wash:
2) help plating to process
By step 1) plating piece that obtains is placed in quickening liquid, at 40 ℃ of temperature, helps plating, and helping the plating time is 45 seconds;
3) hot dip process
Above-mentioned component is by weight percentage mixed, melting at 470 ℃ of temperature, obtain alloy electroplating bath, by step 2) plating piece that obtains dries 25s at 125 ℃ of temperature, after specimen surface whiting, immediately plating piece is put into alloy electroplating bath, controlling alloy electroplating bath temperature is under 468 ℃ of conditions, after immersion plating 20s, immediately sample is proposed to aluminium alloy and carries out naturally cooling.
Wherein, step 2) help the preparation of quickening liquid in plating processing: by 330 grams of ZnCl
2, 11 grams of NaCl, 22 grams of NaF add in 1 premium on currency solvent, are uniformly mixed.
The alloying constituent of table 4 plating solution (wt%).
| Zn | Al | Ni | Rare earth element |
| Surplus | 8 | 0.05 | 0.2 |
Although describe the present invention in conjunction with the preferred embodiments, but the present invention is not limited in the middle of above-described embodiment, should be appreciated that, under the guiding of the present invention's design, those skilled in the art can carry out various modifications and improvement, and claims have been summarized scope of the present invention.
Claims (9)
1. an alloy layer for power transmission line overhead ground wire, is characterized in that described alloy layer comprises that metal plating liquid and the quickening liquid by following component by mass percentage, prepared make:
Described metal plating liquid comprises: aluminium 3～8%, nickel 0.01～3%, rare earth 0.02～3%, and surplus is zinc;
Described quickening liquid is 300～350 grams of ZnCl
2, 10～15 grams of NaCl, 20～25 grams of NaF and 1 premium on currency be prepared from.
2. alloy layer according to claim 1, is characterized in that described alloy layer is prepared from by following component by weight percentage:
Aluminium 5～8%, nickel 0.01～1%, rare earth 0.05～2%, surplus is zinc.
3. alloy layer according to claim 1, is characterized in that described alloy layer is prepared from by following component by weight percentage:
Aluminium 5～6%, nickel 0.02～2%, rare earth 0.2～3%, surplus is zinc.
4. according to the alloy layer described in claim 1 or 2 or 3, it is characterized in that described rare earth Wei Cong Lanthanum, cerium, yttrium, gadolinium
With any one or the multiple combination selected in neodymium.
5. alloy layer according to claim 4, is characterized in that described rare earth is lanthanum and/or cerium.
6. a preparation technology for alloy layer according to claim 1, comprises the following steps:
1) acid washing plating piece
5～10 minutes after washings of the hydrochloric acid plating piece that is 10～20% by concentration washing;
2) help plating to process
In 30～90 ℃ to step 1) process the plating piece obtain and in quickening liquid, help plating 10～30 seconds;
3) hot dip process
The component of the metal level in any one claim of claim 1～4 is mixed, at 465～475 ℃, metal plating liquid is prepared in melting, by through step 2) plating piece processed is in drying 10～30s at 120～150 ℃ to cooling from aluminium alloy proposition after immersion plating 20～50s in described alloy electroplating bath after this plating piece surface whiting.
7. preparation technology according to claim 5, is characterized in that described quickening liquid is 320～350 grams of ZnCl
2, 10～15 grams of NaCl, 20～25 grams of NaF and 1 premium on currency be prepared from.
8. preparation technology according to claim 5, is characterized in that described step 2) in help plating temperature be 80 ℃, helping the plating time is 20s.
9. preparation technology according to claim 5, the container that it is characterized in that described hot dip process is ceramic zinc boiler.
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Cited By (6)
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| CN104911522A (en) * | 2015-06-09 | 2015-09-16 | 武汉钢铁(集团)公司 | Steel wire galvanizing method |
| CN105568059A (en) * | 2016-01-08 | 2016-05-11 | 国网智能电网研究院 | High-corrosion-resistance overhead ground wire alloy plating layer and preparing process thereof |
| CN105734343A (en) * | 2016-03-31 | 2016-07-06 | 江苏中远稀土新材料有限公司 | Rare-earth multi-element alloy coating and hot-dip galvanizing method thereof |
| CN105803370A (en) * | 2016-03-23 | 2016-07-27 | 全球能源互联网研究院 | Steel core line anti-corrosion alloy coating and preparing method thereof |
| CN109136597A (en) * | 2018-09-13 | 2019-01-04 | 安阳工学院 | One kind improving the corrosion proof method of as cast condition zinc-aluminum eutectic alloy by addition Nd |
| CN113528875A (en) * | 2021-06-29 | 2021-10-22 | 海西华汇化工机械有限公司 | Method for adding alloy elements for hot galvanizing of steel |
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| CN105734343A (en) * | 2016-03-31 | 2016-07-06 | 江苏中远稀土新材料有限公司 | Rare-earth multi-element alloy coating and hot-dip galvanizing method thereof |
| CN109136597A (en) * | 2018-09-13 | 2019-01-04 | 安阳工学院 | One kind improving the corrosion proof method of as cast condition zinc-aluminum eutectic alloy by addition Nd |
| CN113528875A (en) * | 2021-06-29 | 2021-10-22 | 海西华汇化工机械有限公司 | Method for adding alloy elements for hot galvanizing of steel |
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