CN108588494A - Zinc-iron reaction is inhibited to spend K-P-B allumens used for hot dip galvanizing without zinc - Google Patents
Zinc-iron reaction is inhibited to spend K-P-B allumens used for hot dip galvanizing without zinc Download PDFInfo
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- CN108588494A CN108588494A CN201810601082.3A CN201810601082A CN108588494A CN 108588494 A CN108588494 A CN 108588494A CN 201810601082 A CN201810601082 A CN 201810601082A CN 108588494 A CN108588494 A CN 108588494A
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C1/00—Making non-ferrous alloys
- C22C1/02—Making non-ferrous alloys by melting
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- 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
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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
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- Coating With Molten Metal (AREA)
Abstract
The invention discloses zinc-iron reaction is inhibited K P B allumens used for hot dip galvanizing are spent without zinc.According to weight percent, the ingredient of the alloy is:K:0.4‑0.6wt.%,Cd:1.0‑2.5wt.%,Ca:2.0‑2.5wt.%,Al:30.0‑35.0wt.%,Te:0.1‑0.2wt.%,In:1.0‑1.2wt.%,B:0.1‑0.2wt.%,P:0.2 0.3wt.%, surplus are zinc.The hot dipping of zinc-aluminum alloy and its technique solve the critical issue in hot dipping of zinc-aluminum alloy application study and industrialization.And the surface state for making final products have extremely excellent corrosion resistance and be spent without zinc.Thus the material will be more widely applied in the near future.
Description
Technical field
The present invention relates to technical field of alloy, specifically, being related to a kind of allumen.
Background technology
90% or more transport power leans on sea transport in international trade.Ocean platform is the mainstay of petrol resources exploitation, sea
Upper wind-powered electricity generation is the new energy greatly developed in recent years.Therefore, ocean engineering anticorrosion material and technology are greatly developed, for ensureing sea
The military service safety and reliability of foreign engineering and ship reduce the generation of disaster sexual behavior event, extend the use of marine structure
Service life is of great significance.
The etching problem of the infrastructure and essential industry facility be on active service in marine environment is serious, especially ship and sea
The etching problem of foreign platform is more prominent, corrosion have become influence ship, offshore engineering, ocean facility military service safety, the service life,
The most important factor of reliability causes the great attention of countries in the world government and industrial quarters.It is pure due to the evil property omited of marine environment
Zinc coating steel wire has been difficult to meet the requirements, and needs the corrosion resistant products using high quality.
Hot-dip abbreviation hot dip.Hot dip is plating piece to be immersed in molten metal liquid its surface is made to form metal-plated
A kind of process of layer.Specifically plated steel material is immersed in the coated metal of melting and further take out cooling, makes its table
Face forms the coat of metal, it is widely used in the production of low-melting-point metal zinc, tin, aluminium, lead and its alloy layer, is with corrosion protection mainly
Purpose, and have certain decoration function.
As the requirement to hot dip zinc product inherent quality, presentation quality, use quality is continuously improved, traditional hot-dip
Zinc cannot fully meet the environmental corrosion needs of existing getting worse.Presently, the hot dipping of anti-corrosion ability is had more
Alloy plating system is allumen.The existing aluminium element of hot dipping of zinc-aluminum alloy acts on the barrier protection that base steel and environment separate,
It is stack pile hot dip to have the electrochemical protection performance that Zn-ef ficiency is excellent, the resistance to corrosion in various air again.The 2-3 of zinc layers
Times, processing forming, being coated with property are better than hot dip galvanized product and technique.
When hot dipping of zinc-aluminum alloy works in a corrosive environment, the corrosion product (basic carbonate of alloy hot dip coating
Zinc-aluminium hydrate etc.) gradually product be attached on the surface of the hole between powder and matrix, these basic zinc carbonate aluminium hydrate indissolubles
Yu Shui, they are covered in coating surface one layer of fine and close gelatinous membrane of formation and hinder the arrival iron-based such as oxygen atom, hydrone
Body surface face.As it can be seen that hot dipping of zinc-aluminum alloy coating has good shielding action to corrosive medium, electrochemical corrosion can be reduced
Speed makes the depletion rate of iron-based body significantly reduce, to also improve the cathodic protection efficiency of coating.
In process of production, after zinc-plated band comes out from zinc pot, the injection through air knife, a large amount of zinc liquid are blown back zinc pot, this
When belt steel surface also have kirsite, be in a liquid state and be attached to surface of steel plate, surface of steel plate formed mass crystallization core, as steel plate rises
It is cooling, so that the nuclei of crystallization is slowly grown up to zinc flower.The faster zinc of cooling velocity is spent smaller, and cooling velocity slower zinc flower is bigger.Zinc is spent
With ornamental value, no actual use value is on the contrary in terms of anticorrosion and bad.Developed country all carries out small zinc flower and without zinc
Flower galvanized steel plain sheet.
There is also a certain distance compared with world standard for the development of China's thermal dip plating of steel zinc-aluminium.Existing hot dip zinc-aluminium life
Producing line majority there are backward in technique, product yield is low, poor product quality, production cost are high, energy charge is big, environmental protection measure not
Power, the shortcomings of often resulting in Heavy environmental pollution, such production line are difficult to meet the needs of Chinese national economy rapid development.Seek more preferable
Design of material method become one of the critical issue solved in hot-dip galvanized steel sheet application study and industrialization.In addition, passing through
Advanced materialogy design is also to solve the solution party of hot-dip aluminum zinc alloy significant problem in galvanizing by dipping production process
One of to.It is anticipated that novel hot-dip aluminum zinc alloy can solve industrial problem as above, such material in the near future
Material will be in the wide application more obtained using field.
Invention content
The purpose of the present invention is to overcome the deficiency in the prior art, and providing one kind can make under 420-480 degree atmospheric conditions
The reaction of inhibition zinc-iron spends K-P-B allumens used for hot dip galvanizing without zinc.
To achieve the goals above, the present invention adopts the following technical scheme that：
A kind of reaction of inhibition zinc-iron spends K-P-B allumens used for hot dip galvanizing without zinc.By weight percentage, the group of alloy becomes K:
0.4-0.6wt.%,Cd:1.0-2.5wt.%,Ca:2.0-2.5wt.%,Al:30.0-35.0wt.%,Te:0.1-0.2wt.%,In:
1.0-1.2wt.%,B:0.1-0.2wt.%,P:0.2-0.3wt.%, surplus are zinc.The kirsite fusion process because volatilization and
Form the reasons such as clinker and the weight lost is in 1.0-2.0wt.% or so.
The preparation method of K-P-B allumens used for hot dip galvanizing is spent in above-mentioned inhibition zinc-iron reaction without zinc, is included the following steps：It will
As above the raw material matched is added in the electric induction furnace of argon gas protection, and uses silicon carbide crucible；As above the raw material matched is added
Enter into the electric induction furnace of atmosphere protection, and uses silicon carbide crucible；Sensing heating forms alloy solution to 500-600 degree, and
It is sufficiently stirred 10 minutes or so using electromagnetic agitation effect；Alloy liquid is stood in the heat preservation of 500-600 degree and is cast after ten minutes
Semi-continuous casting is carried out into required billet in heat top same level equipment, and it is 5-8m/min that ingot casting, which moves down speed,.The ingot casting
The thin plate galvanizing by dipping that galvanizing by dipping raw material can be regarded for subsequent handling is handled, and the operating temperature of wherein galvanizing by dipping is
420-480 degree, hot dipping time are 30-60 seconds.
Compared with prior art, the present invention has the advantages that：
（1）Zinc flower divides big zinc flower, small zinc flower and spends three kinds of states without zinc, reaches different surfaces by influencing zinc melt crystallization state
Effect.Corrosion resistance is determined by zinc coating thickness, and mechanical performance is determined by substrate.It is every to influence zinc flower-shape core
Final zinc, which can be influenced, with the factor of growth spends size, and most important in these factors is exactly nucleation rate and growth side
Formula.The factor for influencing nucleation rate includes degree of supercooling and surface of steel plate state, and the factor for influencing growth pattern is containing for alloying element
Amount.Traditional hot dipping of zinc-aluminum alloy is very big by production technology influence of fluctuations in process of production, cause zinc spend size and
Distributed pole is uneven.Main cause is the surface quality and zincincation of substrate.The roughness of top and bottom rolls is inconsistent when rolling
Cause the upper and lower plates surface roughness of substrate inconsistent, plate face zinc flower size unevenness up and down may be caused.Plate face is cold up and down when zinc-plated
But the wind speed for inconsistent, the upper and lower plate face air knife of distance that speed is different, air knife knife lip is to the upper and lower plate face of strip and air quantity difference etc.
It will cause plate face zinc flower size unevenness up and down.In addition, the bad reducing atmosphere in annealing furnace of zinc-plated degreasing effect is not
Foot etc. can influence plate face reflectivity, so that zinc layers adherency is reduced, zinc is spent greatly.
（2）The hot dipping of zinc-aluminum alloy of present patent application protection can be fully solved the problem that zinc is spent in actual production, and
So that final hot dipping plated product has excellent corrosion resistance.The process characteristic of the alloy be to production technology and insensitive,
When hot rolled plate plate face covering iron scale is along the fluctuation of the strip established practice type of law, strip scuffing or furnace roller dross etc., these defects are not
The crystalline temperature of zinc flower can be increased.Due to optimizing the crystallization nucleation and growth process of zinc melt so that final products are in no zinc
Colored state.In addition, when air knife and strip are not parallel, when there is angle, the zinc being not easy to produce on strip cross section is spent.
（3）The alloy has close to eutectic structure, possesses best etch resistant properties and Deformation Properties of Al.It thus can be
Rapid cooling after hot dipping of zinc-aluminum alloy can efficiently control the generation of primary phase, and thinning microstructure.In addition, the production work of the alloy
The great advantage of skill is that technological process is short, energy and material consumption is low, plating pot ingredient and coating microscopic structure are easy to control.Plated layer compact is equal
Even, outstanding advantages of construction cost is low, non-environmental-pollution, service life are 3-5 times of conventional hot dip zinc aluminum alloy coating,
Anticorrosion process expense is only higher by 50% or so than normal fees.
（4）The hot dipping of zinc-aluminum alloy can efficiently reduce the table between liquid phase and solid phase after alloying component optimizes
Face tension, to which coating of the smooth even without hot spot can be obtained.Meanwhile alloying element can purify crystal boundary face and reduce intergranular corruption
Erosion.The corrosion potential of the alloy and dip galvanized are essentially identical, but its corrosion current is only the 0.1- of traditional zn alloy coating
0.2.The salt spray resistance of the alloy layer, resistance to sulfur dioxide and hot resistance test performance are better than dip galvanized, corrosion-resistant
There are clear superiorities for ability, and identical even preferably anti-corrosion effect can be obtained using relatively thin zinc aluminum alloy coating.Due to closing
The optimization of gold element reduces zinc-iron reaction speed, improves the mobile performance of liquid metal entirety, therefore thickness of coating is thinned,
List edge, burr, current mark are reduced, and following process amount becomes smaller, and working efficiency improves, while the reduction of zinc slag content reduces disappearing for zinc
Consumption, improves the utilization rate of zinc.When carrying out hot-dip aluminum zinc using the alloy of this patent within the scope of 420-480 degree, zinc disappears
Consumption is decreased obviously compared with zinc-plated with pure zinc.Due to effectively inhibiting the reaction between zinc-iron, to be solution Sheng Delin steel
Galvanizing provides effective method.Using the alloy can while improving plating piece surface quality, reach reduce thickness of coating,
Improve the purpose of the mechanical property and Corrosion Protection of coating.
Specific implementation mode
Embodiment 1
A kind of reaction of inhibition zinc-iron spends K-P-B allumens used for hot dip galvanizing without zinc.By weight percentage, the group of alloy becomes K:
0.4wt.%,Cd:1.0wt.%,Ca:2.0wt.%,Al:30.0wt.%,Te:0.1wt.%,In:1.0wt.%,B:0.1wt.%,P:
0.2wt.%, surplus are zinc.The weight that the kirsite loses in fusion process because of the reasons such as volatilization and formation clinker is in 1.0-
2.0wt.% or so.The preparation method of K-P-B allumens used for hot dip galvanizing is spent in above-mentioned inhibition zinc-iron reaction without zinc, including is walked as follows
Suddenly：As above the raw material matched is added in the electric induction furnace of argon gas protection, and uses silicon carbide crucible；The original that will as above match
Material is added in the electric induction furnace of atmosphere protection, and uses silicon carbide crucible；Sensing heating is molten to 500-600 degree formation alloy
Liquid, and be sufficiently stirred 10 minutes or so using electromagnetic agitation effect；Alloy liquid is stood after ten minutes in the heat preservation of 500-600 degree
It is cast in the same level equipment of heat top and carries out semi-continuous casting into required billet, it is 5-8m/min that ingot casting, which moves down speed,.It should
Ingot casting can regard thin plate galvanizing by dipping of the galvanizing by dipping raw material for subsequent handling and handle, wherein the operating temperature of galvanizing by dipping
For 420-480 degree, the hot dipping time is 30-60 seconds.
The hot dipping of zinc-aluminum alloy can efficiently reduce the surface between liquid phase and solid phase after alloying component optimizes
Power, to which coating of the smooth even without hot spot can be obtained.Meanwhile alloying element can purify crystal boundary face and reduce intercrystalline corrosion, it is right
Improve corrosion resistance.The corrosion potential of the alloy and dip galvanized are essentially identical, but its corrosion current is only traditional kirsite
The 0.1-0.2 of coating.The salt spray resistance of the alloy layer, resistance to sulfur dioxide and hot resistance test performance compare dip galvanized
Good, there are clear superiorities for corrosion resistance, and identical even preferably anti-corrosion can be obtained using relatively thin zinc aluminum alloy coating
Effect.Since the optimization of alloying element reduces zinc-iron reaction speed, the mobile performance of liquid metal entirety is improved, therefore plate
Layer thickness is thinned, and list edge, burr, current mark are reduced, and following process amount becomes smaller, and working efficiency improves, while the reduction drop of zinc slag content
The low consumption of zinc, improves the utilization rate of zinc.Hot-dip aluminum zinc is carried out using the alloy of this patent within the scope of 420-480 degree
When, the consumption of zinc is decreased obviously compared with zinc-plated with pure zinc.Due to effectively inhibiting the reaction between zinc-iron, to holy to solve
Moral woods Steel Materials Heat Coating Zinc provides effective method.It can reach reduction while improving plating piece surface quality using the alloy
The purpose of thickness of coating, the mechanical property and Corrosion Protection of raising coating.
Embodiment 2
A kind of reaction of inhibition zinc-iron spends K-P-B allumens used for hot dip galvanizing without zinc.By weight percentage, the group of alloy becomes K:
0.6wt.%,Cd:2.5wt.%,Ca:2.5wt.%,Al:35.0wt.%,Te:0.2wt.%,In:1.2wt.%,B:0.2wt.%,P:
0.3wt.%, surplus are zinc.The weight that the kirsite loses in fusion process because of the reasons such as volatilization and formation clinker is in 1.0-
2.0wt.% or so.The preparation method of K-P-B allumens used for hot dip galvanizing is spent in above-mentioned inhibition zinc-iron reaction without zinc, including is walked as follows
Suddenly：As above the raw material matched is added in the electric induction furnace of argon gas protection, and uses silicon carbide crucible；The original that will as above match
Material is added in the electric induction furnace of atmosphere protection, and uses silicon carbide crucible；Sensing heating is molten to 500-600 degree formation alloy
Liquid, and be sufficiently stirred 10 minutes or so using electromagnetic agitation effect；Alloy liquid is stood after ten minutes in the heat preservation of 500-600 degree
It is cast in the same level equipment of heat top and carries out semi-continuous casting into required billet, it is 5-8m/min that ingot casting, which moves down speed,.It should
Ingot casting can regard thin plate galvanizing by dipping of the galvanizing by dipping raw material for subsequent handling and handle, wherein the operating temperature of galvanizing by dipping
For 420-480 degree, the hot dipping time is 30-60 seconds.
The hot dipping of zinc-aluminum alloy can efficiently reduce the surface between liquid phase and solid phase after alloying component optimizes
Power, to which coating of the smooth even without hot spot can be obtained.Meanwhile alloying element can purify crystal boundary face and reduce intercrystalline corrosion, it is right
Improve corrosion resistance.The corrosion potential of the alloy and dip galvanized are essentially identical, but its corrosion current is only traditional kirsite
The 0.1-0.2 of coating.The salt spray resistance of the alloy layer, resistance to sulfur dioxide and hot resistance test performance compare dip galvanized
Good, there are clear superiorities for corrosion resistance, and identical even preferably anti-corrosion can be obtained using relatively thin zinc aluminum alloy coating
Effect.Since the optimization of alloying element reduces zinc-iron reaction speed, the mobile performance of liquid metal entirety is improved, therefore plate
Layer thickness is thinned, and list edge, burr, current mark are reduced, and following process amount becomes smaller, and working efficiency improves, while the reduction drop of zinc slag content
The low consumption of zinc, improves the utilization rate of zinc.Hot-dip aluminum zinc is carried out using the alloy of this patent within the scope of 420-480 degree
When, the consumption of zinc is decreased obviously compared with zinc-plated with pure zinc.Due to effectively inhibiting the reaction between zinc-iron, to holy to solve
Moral woods Steel Materials Heat Coating Zinc provides effective method.It can reach reduction while improving plating piece surface quality using the alloy
The purpose of thickness of coating, the mechanical property and Corrosion Protection of raising coating.
Embodiment 3
A kind of reaction of inhibition zinc-iron spends K-P-B allumens used for hot dip galvanizing without zinc.By weight percentage, the group of alloy becomes K:
0.5wt.%,Cd:1.4wt.%,Ca:2.1wt.%,Al:32.0wt.%,Te:0.1wt.%,In:1.0wt.%,B:0.1wt.%,P:
0.2wt.%, surplus are zinc.The kirsite is in fusion process because the weight ` for volatilizing and forming the reasons such as clinker and losing exists
1.0-2.0wt.% or so.The preparation method of K-P-B allumens used for hot dip galvanizing is spent in above-mentioned inhibition zinc-iron reaction without zinc, including such as
Lower step：As above the raw material matched is added in the electric induction furnace of argon gas protection, and uses silicon carbide crucible；It will as above match
Raw material be added in the electric induction furnace of atmosphere protection, and use silicon carbide crucible；Sensing heating forms alloy to 500-600 degree
Solution, and be sufficiently stirred 10 minutes or so using electromagnetic agitation effect；Alloy liquid is stood 10 minutes in the heat preservation of 500-600 degree
After be cast in the same level equipment of heat top and carry out semi-continuous casting into required billet, it is 5-8m/min that ingot casting, which moves down speed,.
The ingot casting can regard thin plate galvanizing by dipping of the galvanizing by dipping raw material for subsequent handling and handle, wherein the work temperature of galvanizing by dipping
Degree is 420-480 degree, and the hot dipping time is 30-60 seconds.
The hot dipping of zinc-aluminum alloy can efficiently reduce the surface between liquid phase and solid phase after alloying component optimizes
Power, to which coating of the smooth even without hot spot can be obtained.Meanwhile alloying element can purify crystal boundary face and reduce intercrystalline corrosion, it is right
Improve corrosion resistance.The corrosion potential of the alloy and dip galvanized are essentially identical, but its corrosion current is only traditional kirsite
The 0.1-0.2 of coating.The salt spray resistance of the alloy layer, resistance to sulfur dioxide and hot resistance test performance compare dip galvanized
Good, there are clear superiorities for corrosion resistance, and identical even preferably anti-corrosion can be obtained using relatively thin zinc aluminum alloy coating
Effect.Since the optimization of alloying element reduces zinc-iron reaction speed, the mobile performance of liquid metal entirety is improved, therefore plate
Layer thickness is thinned, and list edge, burr, current mark are reduced, and following process amount becomes smaller, and working efficiency improves, while the reduction drop of zinc slag content
The low consumption of zinc, improves the utilization rate of zinc.Hot-dip aluminum zinc is carried out using the alloy of this patent within the scope of 420-480 degree
When, the consumption of zinc is decreased obviously compared with zinc-plated with pure zinc.Due to effectively inhibiting the reaction between zinc-iron, to holy to solve
Moral woods Steel Materials Heat Coating Zinc provides effective method.It can reach reduction while improving plating piece surface quality using the alloy
The purpose of thickness of coating, the mechanical property and Corrosion Protection of raising coating.
Claims (3)
1. a kind of inhibition zinc-iron reaction spends K-P-B allumens used for hot dip galvanizing without zinc；According to weight percent, the ingredient of the alloy
For: K:0.4-0.6wt.%,Cd:1.0-2.5wt.%,Ca:2.0-2.5wt.%,Al:30.0-35.0wt.%,Te:0.1-
0.2wt.%,In:1.0-1.2wt.%,B:0.1-0.2wt.%,P:0.2-0.3wt.%, surplus are zinc.
2. zinc-iron reaction is inhibited to spend K-P-B allumens used for hot dip galvanizing without zinc described in claim 1, it is characterised in that including as follows
Smelting step：As above the raw material matched is added in the electric induction furnace of argon gas protection, and uses silicon carbide crucible；To as above it match
The raw material of ratio is added in the electric induction furnace of atmosphere protection, and uses silicon carbide crucible；Sensing heating is formed to 500-600 degree and is closed
Gold solution, and be sufficiently stirred 10 minutes or so using electromagnetic agitation effect；Alloy liquid is stood 10 points in the heat preservation of 500-600 degree
It is cast to after clock in the same level equipment of heat top and carries out semi-continuous casting into required billet, it is 5-8m/ that ingot casting, which moves down speed,
min。
3. spending K-P-B allumens used for hot dip galvanizing without zinc according to zinc-iron reaction is inhibited described in claim 1, it is characterised in that comprising such as
It is lower to use step：The ingot casting can regard thin plate galvanizing by dipping of the galvanizing by dipping raw material for subsequent handling and handle, wherein hot dipping
Zinc-plated operating temperature is 420-480 degree, and the hot dipping time is 30-60 seconds.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810601082.3A CN108588494A (en) | 2018-06-12 | 2018-06-12 | Zinc-iron reaction is inhibited to spend K-P-B allumens used for hot dip galvanizing without zinc |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810601082.3A CN108588494A (en) | 2018-06-12 | 2018-06-12 | Zinc-iron reaction is inhibited to spend K-P-B allumens used for hot dip galvanizing without zinc |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108588494A true CN108588494A (en) | 2018-09-28 |
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ID=63623473
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810601082.3A Withdrawn CN108588494A (en) | 2018-06-12 | 2018-06-12 | Zinc-iron reaction is inhibited to spend K-P-B allumens used for hot dip galvanizing without zinc |
Country Status (1)
| Country | Link |
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2018
- 2018-06-12 CN CN201810601082.3A patent/CN108588494A/en not_active Withdrawn
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Application publication date: 20180928 |