CN109852914A - A kind of high-strength alloyed steel plate hot dip galvanizing process - Google Patents
A kind of high-strength alloyed steel plate hot dip galvanizing process Download PDFInfo
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- CN109852914A CN109852914A CN201910156961.4A CN201910156961A CN109852914A CN 109852914 A CN109852914 A CN 109852914A CN 201910156961 A CN201910156961 A CN 201910156961A CN 109852914 A CN109852914 A CN 109852914A
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- steel plate
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- alloyed steel
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Abstract
The invention discloses a kind of high-strength alloyed steel plate hot dip galvanizing process, steps are as follows: workpiece is carried out degreasing, chemical deoiling and degreasing can be selected to deoil with water-base metal degreased cleaning agent, reach until workpiece is flooded profit completely, carry out pickling, using H2SO4, thiocarbamide, methenamine, carry out pickling, corrosion inhibiter, which is added, can prevent matrix excessive erosion and reduce iron matrix hydrogen-sucking amount, fog inhibitor is added simultaneously and inhibits acid mist evolution, carry out leaching fluxing agent, there is workpiece certain activity to avoid secondary oxidation before being positively retained at immersion plating, to enhance coating in conjunction with matrix, using NH4Cl, ZnCl2, and a certain amount of anti-knock agent is added, then carry out drying preheating, workpiece is deformed in immersion plating since temperature sharply increases in order to prevent, and remove residual moisture, prevent quick-fried zinc, cause zinc liquid is quick-fried to splash, preheating generally 80 ~140 DEG C, hot galvanizing is carried out, promotes the meltage and pickling speed of solid element, activation penetration is strong, brings better prospect of the application.
Description
Technical field
The invention belongs to hot galvanizing fields, are suitable for steel plate hot dip galvanizing process, especially to high-strength alloyed steel plate hot
It is zinc-plated.
Background technique
Galvanizing and galvanizing by dipping are also named in hot galvanizing, are a kind of effective anti-corrosion of metal modes, are mainly used for every profession and trade
On metal structure facility, it is that the steel part after derusting immerses in the zinc liquid of 500 DEG C or so thawings, steel member surface is made to adhere to zinc
Layer, to play corrosion-resistant purpose, hot dip galvanizing process process is finished product acid-washing-washing-plus quickening liquid-drying-rack plating-cooling-
Medicine-cleaning-polishing-hot galvanizing completion, hot galvanized layer forming process are formation iron-between iron matrix and outmost pure zinc layer
The process of kirsite, workpiece surface form iron-zinc alloy layer in hot-dip, just to be combined very well between iron and pure zinc layer,
Its process can be simply described as: when ironworker's part immerses the zinc liquid of melting, forming zinc first on interface and α iron (body-centered) is solid
Melt, this is that parent metal iron forms a kind of crystal dissolved with zinc atom in the solid state, is to melt between two kinds of metallic atoms
It closes, gravitation is smaller between atom, and temperature and the liquid level of zinc liquid change greatly, and is easy to influence the meltage of solid element, pickling
Speed is not fast enough, and activation seepage force is not strong.
Summary of the invention
The main purpose of the present invention is to provide a kind of high-strength alloyed steel plate hot dip galvanizing process, can effectively solve to carry on the back
The problems in scape technology.
To achieve the above object, the technical scheme adopted by the invention is as follows:
A kind of high-strength alloyed steel plate hot dip galvanizing process, follows the steps below to implement:
Step S1: carrying out degreasing for workpiece, and chemical deoiling and degreasing can be selected and deoil with water-base metal degreased cleaning agent, it is complete to reach workpiece
Until being flooded profit；
Step S2: carrying out pickling, and using H2SO4, thiocarbamide, methenamine carries out pickling, and corrosion inhibiter, which is added, can prevent matrix excessively rotten
Erosion and reduction iron matrix hydrogen-sucking amount, while fog inhibitor is added and inhibits acid mist evolution；
Step S3: carrying out leaching fluxing agent, and there is workpiece certain activity to avoid secondary oxidation before being positively retained at immersion plating, to enhance coating
In conjunction with matrix, using NH4Cl, ZnCl2, and a certain amount of anti-knock agent is added；
Step S4: drying preheating then is carried out, workpiece is deformed in immersion plating since temperature sharply increases in order to prevent, and is removed
Residual moisture prevents quick-fried zinc, causes zinc liquid is quick-fried to splash, generally 80~140 DEG C of preheating.
Step S5: carrying out hot galvanizing, to control the speed that zinc liquid temperature, immersion plating time and workpiece are drawn from zinc liquid,
Off speed is generally 1.5 meters/min.
Step S6: arranging, and arranging after plating to workpiece is mainly to remove zinc and list edge more than surface, with using the dedicated shake of hot galvanizing
Dynamic device is completed；
Step S7: passivation, it is therefore an objective to improve workpiece surface weather-resistant performance, reduce white rust time of occurrence, keep coating tool
There is good appearance, all uses chromating.
Step S8: generally using water cooling, but temperature can not it is too low also can not be excessively high, it is general that 70 DEG C are not higher than not less than 30 DEG C.
Step S9: Deposit appearance is bright, careful, no sag, elephant skin phenomenon, and coating thickness detector can be used in Inspection of Thickness, side
Method is easier, can also be converted to obtain thickness of coating by amount of zinc adhesion, bender can be used in bond strength, by sample
Part make 90~180 ° bending, answer flawless and coating to fall off, it is also possible to weight tap examine, and in batches do salt spray test and
Copper sulphate etch test.
2. a kind of high-strength alloyed steel plate hot dip galvanizing process according to right 1, which is characterized in that described.
3. a kind of high-strength alloyed steel plate hot dip galvanizing process according to right 1, which is characterized in that the use
H2SO4 15%, thiocarbamide 0.1%, 3~5g/L of methenamine, temperature are controlled in 20~40 DEG C of progress pickling.
4. a kind of high-strength alloyed steel plate hot dip galvanizing process according to right 1, which is characterized in that the use
NH4Cl 100-150g/L, ZnCl2 150-180g/L, temperature is at 70~80 DEG C, and the time is in 1~2min.
5. a kind of high-strength alloyed steel plate hot dip galvanizing process according to right 4, which is characterized in that the passivation
When 80~100g/L of Na2Cr2O7,3~4ml/L of sulfuric acid can be added.
Compared with prior art, the invention has the following beneficial effects:
In the present invention, white picking is carried out, the compound hydrochloric acid pickler of room temperature, the compound hydrochloric acid pickler of room temperature are used in second
Hydrochloric acid in formula is main component, and pickling speed can be improved in the addition of hydrochloric acid, and TX 10 has activation osmosis, SLS activity
Agent can play the role of wetting and infiltration compound action, while having and inhibiting acid mist；Additive is a kind of organic matter carboxylic-containing acid,
Complexing can be played with Fe, Fe, reduce the iron ion content in hydrochloric acid pickler, advantageously reduce zinc-iron alloy (zinc in zinc liquid
Slag) generation and improve the ductility of steelwork Zinc coat, wash and washed using warm water using warm water after pickling, mainly examine
Worry can rinse well, dissolve the molysite for being adhered to steelwork surface, reduce the molysite brought into lower road T sequence (helping plating), because
The effect for quickly removing molysite can be just played for certain temperature to be reached (> 25 ~ C), considered from energy saving angle, it can be by steel
Water after product galvanizing in cooling water flow in pond is introduced into the rinsing bath after pickling, plays the role of warm water cleaning, controls zinc liquid temperature
The fluctuation range of degree, the Zincification ingot into zinc liquid, is added zinc ingot metal after the decline of zinc pot liquid level, to control zinc to the maximum extent in time
The liquid level of liquid and the fluctuation of zinc liquid temperature, while zincification is centainly slow, so that zinc ingot metal sufficiently melts, so that elemental composition is sufficiently mixed
It closes, brings better prospect of the application.
Detailed description of the invention
Fig. 1 is specific flow chart of the present invention.
Specific embodiment
In a specific embodiment, high-strength alloyed steel plate hot dip galvanizing process will be described clear and completely in conjunction with attached drawing
Detailed process.It should be pointed out that these descriptions are example, the range being not intended to limit the present invention.In addition, following
In explanation, descriptions of well-known structures and technologies are omitted, obscures idea of the invention to avoid unnecessary.
Specific step is as follows:
The present invention is a kind of high-strength alloyed steel plate hot dip galvanizing process, and workpiece is carried out degreasing, and chemical deoiling and degreasing and water can be selected
Base Metal degreased cleaning agent deoils, and reaches until workpiece is flooded profit completely, pickling is carried out, using H2SO4, thiocarbamide, Wu Luotuo
Product carry out pickling, and corrosion inhibiter, which is added, can prevent matrix excessive erosion and reduce iron matrix hydrogen-sucking amount, while fog inhibitor is added and inhibits acid
Mist evolution, carries out leaching fluxing agent, and there is workpiece certain activity to avoid secondary oxidation before being positively retained at immersion plating, to enhance coating and base
Body combines, and using NH4Cl, ZnCl2, and a certain amount of anti-knock agent is added, then carries out drying preheating, workpiece is soaking in order to prevent
It is deformed when plating since temperature sharply increases, and removes residual moisture, prevent quick-fried zinc, cause that zinc liquid is quick-fried to be splashed, preheating is general
It is 80~140 DEG C, carries out hot galvanizing, to control the speed that zinc liquid temperature, immersion plating time and workpiece are drawn from zinc liquid, draws
Speed is generally 1.5 meters/min, arranges, and arranging after plating to workpiece is mainly to remove zinc and list edge more than surface, with using hot galvanizing
Dedicated vibrator is completed, and is passivated, it is therefore an objective to be improved workpiece surface weather-resistant performance, be reduced white rust time of occurrence, keep
Coating have good appearance, all use chromating, generally use water cooling, but temperature can not it is too low also can not be excessively high, generally not
70 DEG C are not higher than lower than 30 DEG C, Deposit appearance is bright, careful, no sag, elephant skin phenomenon, and coating thickness measuring can be used in Inspection of Thickness
Instrument, method is easier, can also be converted to obtain thickness of coating by amount of zinc adhesion, crooked pressure can be used in bond strength
Machine, by exemplar make 90~180 ° bending, answer flawless and coating to fall off, it is also possible to weight tap examine, and in batches cook salt
Mist test and copper sulphate etch test, the hot galvanized layer of hot galvanizing are controlled at 35 μm or more, using H2SO4 15%, thiocarbamide 0.1%,
3~5g/L of methenamine, temperature are controlled in 20~40 DEG C of progress pickling.
The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention.The technology of the industry
Personnel are it should be appreciated that the present invention is not limited to the above embodiments, and the above embodiments and description only describe this
The principle of invention, without departing from the spirit and scope of the present invention, various changes and improvements may be made to the invention, these changes
Change and improvement all fall within the protetion scope of the claimed invention.The claimed scope of the invention by appended claims and its
Equivalent thereof.
Claims (5)
1. a kind of high-strength alloyed steel plate hot dip galvanizing process, follows the steps below to implement:
Step S1: carrying out degreasing for workpiece, and chemical deoiling and degreasing can be selected and deoil with water-base metal degreased cleaning agent, it is complete to reach workpiece
Until being flooded profit；
Step S2: carrying out pickling, and using H2SO4, thiocarbamide, methenamine carries out pickling, and corrosion inhibiter, which is added, can prevent matrix excessively rotten
Erosion and reduction iron matrix hydrogen-sucking amount, while fog inhibitor is added and inhibits acid mist evolution；
Step S3: carrying out leaching fluxing agent, and there is workpiece certain activity to avoid secondary oxidation before being positively retained at immersion plating, to enhance coating
In conjunction with matrix, using NH4Cl, ZnCl2, and a certain amount of anti-knock agent is added；
Step S4: drying preheating then is carried out, workpiece is deformed in immersion plating since temperature sharply increases in order to prevent, and is removed
Residual moisture prevents quick-fried zinc, causes zinc liquid is quick-fried to splash, generally 80~140 DEG C of preheating；
Step S5: carrying out hot galvanizing, to control the speed that zinc liquid temperature, immersion plating time and workpiece are drawn from zinc liquid, draws
Speed is generally 1.5 meters/min；
Step S6: arranging, and arranging after plating to workpiece is mainly to remove zinc and list edge more than surface, with using the dedicated vibrator of hot galvanizing
To complete；
Step S7: passivation, it is therefore an objective to improve workpiece surface weather-resistant performance, reduce white rust time of occurrence, keep coating tool
There is good appearance, all uses chromating；
Step S8: generally using water cooling, but temperature can not it is too low also can not be excessively high, it is general that 70 DEG C are not higher than not less than 30 DEG C；
Step S9: Deposit appearance is bright, careful, no sag, elephant skin phenomenon, and coating thickness detector, method ratio can be used in Inspection of Thickness
It is easier, it can also be converted to obtain thickness of coating by amount of zinc adhesion, bender can be used in bond strength, and exemplar is made
90~180 ° bending, answer flawless and coating to fall off, it is also possible to weight tap examine, and in batches do salt spray test and sulfuric acid
Copper etch test.
2. a kind of high-strength alloyed steel plate hot dip galvanizing process according to right 1, which is characterized in that the heat of the hot galvanizing
Zinc coat is controlled at 35 μm or more.
3. a kind of high-strength alloyed steel plate hot dip galvanizing process according to right 1, which is characterized in that described to use H2SO4
15%, thiocarbamide 0.1%, 3~5g/L of methenamine, temperature control is in 20~40 DEG C of progress pickling.
4. a kind of high-strength alloyed steel plate hot dip galvanizing process according to right 1, which is characterized in that described to use NH4Cl
100-150g/L, ZnCl2 150-180g/L, temperature is at 70~80 DEG C, and the time is in 1~2min.
5. a kind of high-strength alloyed steel plate hot dip galvanizing process according to right 4, which is characterized in that the passivation Shi Kejia
Enter 80~100g/L of Na2Cr2O7,3~4ml/L of sulfuric acid.
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110904399A (en) * | 2019-12-03 | 2020-03-24 | 浙江天阳钢管有限公司 | Hot-dip galvanizing process for high-strength steel pipe |
| CN112359305A (en) * | 2020-10-28 | 2021-02-12 | 王倩倩 | Hot galvanizing process for high-strength alloyed steel plate |
| CN112522704A (en) * | 2020-11-27 | 2021-03-19 | 安徽吉利电气设备有限公司 | Corrosion prevention method for stainless steel outdoor power cabinet |
| CN112746233A (en) * | 2020-12-21 | 2021-05-04 | 芜湖隆深机器人有限公司 | Production line type galvanizing process |
| CN114086094A (en) * | 2021-11-19 | 2022-02-25 | 湖南杭德通讯有限公司 | Hot galvanizing process for metal fastener |
| CN114807805A (en) * | 2022-05-31 | 2022-07-29 | 鞍钢股份有限公司 | Hot galvanizing production method for high-strength steel and ultrahigh-strength steel |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110904399A (en) * | 2019-12-03 | 2020-03-24 | 浙江天阳钢管有限公司 | Hot-dip galvanizing process for high-strength steel pipe |
| CN112359305A (en) * | 2020-10-28 | 2021-02-12 | 王倩倩 | Hot galvanizing process for high-strength alloyed steel plate |
| CN112522704A (en) * | 2020-11-27 | 2021-03-19 | 安徽吉利电气设备有限公司 | Corrosion prevention method for stainless steel outdoor power cabinet |
| CN112746233A (en) * | 2020-12-21 | 2021-05-04 | 芜湖隆深机器人有限公司 | Production line type galvanizing process |
| CN114086094A (en) * | 2021-11-19 | 2022-02-25 | 湖南杭德通讯有限公司 | Hot galvanizing process for metal fastener |
| CN114807805A (en) * | 2022-05-31 | 2022-07-29 | 鞍钢股份有限公司 | Hot galvanizing production method for high-strength steel and ultrahigh-strength steel |
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Application publication date: 20190607 |
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