CN101818374A - Production method of solar absorber plate - Google Patents
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Abstract
The invention discloses a production method of a solar absorber plate, which aims at solving the deficiency of the preparation process technology of the existing solar selective absorbing coating, difficult realization of preparation of large-area coating with the existing process technology, and high manufacturing cost. The production method comprises the following steps: taking a chrome-base alloy steel plate as a matrix material; pre-processing the plate such as de-oiling, polishing, activating, washing and the like; taking nitric acid, manganese sulphate, ammonium nitrate and the like as main coloring agents, and then coloring by chemical oxidation blackening; and finally performing chemical solidification and seal treatment to obtain the chrome-base alloy steel solar absorber plate with uniform bright-black conversion coating on the surface. The chrome-base alloy steel solar absorber plate has the characteristics of high thermal absorption rate and low emission rate, can be taken as the solar absorber plate for solar photo-thermal conversion, and can be widely applied to solar heat utilization equipment such as a flat-plate solar air collector, a solar water heater and the like.
Description
Technical field
The invention belongs to the solar energy utilization technique field, relate to the technology of preparing of solar absorber plate photo-thermal conversion film, is a kind of production method of solar absorber plate specifically.
Background technology
Striding into 21 century, the mankind will face the significant challenge that realizes economy and social sustainable development, and developing the economy under the dual restriction of limited resources and environmental protection strict demand becomes global hot issue.And energy problem will be more outstanding, not only show the deficient not enough of conventional energy resources, the more important thing is a series of problems that exploitation of fossil energy resources brings, as environmental pollution, and Greenhouse effect etc.Present environmental problem is because the development and use of the energy (particularly fossil energy) cause to a great extent.Therefore, the mankind will solve above-mentioned energy problem, realize Sustainable development, can only rely on scientific and technological advances, and develop renewable and clean energy resource on a large scale.Sun power is with its unique advantage, and its development and use will obtain significant progress in 21 century, and takes on heavy responsibilities in world's energy structure at last, becomes the leading energy in later stage 21 century.
The heat utilization technology of sun power is a very important aspect of sun power utilization, and what directly determine solar thermal utilization efficient is coating for selective absorption.Two important parameters of reflection coating for selective absorption optical property are coatings to the specific absorption of visible region with to the emittance in infrared light district.According to the evolution and the application of coating for selective absorption technology, the sun power coating technology has experienced coating type, electrodeposition-type, four different coating development periods of electrochemistry type and vacuum plating.
1, the coating type coating for selective absorption stage
1979～1980 years, Solar Energy Inst., Beijing City developed lead sulfide/bituminous varnish coating, adopted spraying coating process to prepare the coating for selective absorption of α=0.93, ε=0.33～0.5.This coating process is simple, and is with low cost, is applied in obviously to have improved collecting efficiency on the flat plate collector, becomes the coating for selective absorption that China's solar energy collector uses the earliest.But the coating emittance with this method preparation is higher, and because pyrolysis at high temperature takes place in the paint adhesion agent, so in generally being used in, under the cold condition, and work-ing life is shorter.
2, electrochemical plating preparatory phase
Utilize electric plating method will have the metal-plated of light selectivity absorption on substrate.Electroplated coating commonly used mainly contains black nickel coating, black chrome coating, black cobalt coating etc., and these coatings all have the good optical performance.Effect with black chromium and black nickel is best, absorptivity-emissivity ratio (α/ε) near 6～13, but electroplating black chromium production cost height, the Cr in the plating bath simultaneously
6+Environment there is pollution.The black nickel plating power consumption is few, and cost is low, does not have toxic substance in the plating bath, but black nickel coating is thin, and thermostability and solidity to corrosion are relatively poor, only are applicable to the low-temperature solar energy thermal utilization usually.
3, the electrochemical production stage
The most frequently used electrochemical process is metal substrate (Al, Cu, Fe etc.) to be put into the solution that contains phosphoric acid carry out anodic oxidation, make its surface produce one deck porous oxide, put into some metal salt solution then, utilize electrolytic deposition metal refining (Ni, Co, Mo etc.) in the hole.Discover sedimentary metal major part in the bottom in hole, such structure can be avoided extraneous erosion by the protective money metal particles.Because porous oxide has good thermostability and chemical stability, in this way Zhi Bei film has good heat endurance and erosion resistance, can be used as the high temperature heat-sink material.And the absorbing properties of this film is also better, and α is generally greater than 0.90, and ε about 0.1, has higher α/ε value again.But the main drawback production cost that this method is produced is higher, and needs in process of production waste liquid is controlled, otherwise can cause severe contamination to environment.
4, vacuum plating preparatory phase
Vacuum Coating method is meant and utilizes vacuum-evaporation and magnetron sputtering deposition single or multiple lift composite membrane.Magnetically controlled sputter method has very high handiness, by changing the target material of magnetron sputtering, can prepare various films, thus the good selective absorption film of optimization.Adopt the film of sputtering method preparation to have very high thermotolerance, can be used for hot environment.This method can economical with materials, and does not have the liquid waste disposal problem in electrochemical plating, the electrochemical process, has the feature of environmental protection, but its equipment price costliness, and the solar energy heat absorbing area is less, is unfavorable for extensive popularization.
As seen, existing coat preparing technology exists production cost height, technological operation difficulty, is difficult to realize the shortcomings such as preparation of big area photo-thermal conversion coating, has limited popularization and the utilization of sun power aspect big area daylighting.
In the production method (CN101012558A) of existing a kind of solar energy optical-thermal conversion material, the oxidation blackening agent for surface adopts sulfuric acid, nitrate, ammonium sulfate and hydroxy-benzoic acid.The mn ion content that does not contain mn ion in the existing blackening agent for surface or dissolve from chromium alloyed steel is low excessively, causes the blackout film forming speed slower, and the work period is long, and energy loss is big, and production cost is higher.
Summary of the invention
The invention provides a kind of production method of solar absorber plate, be difficult to realize the preparation and the cost of manufacture problem of higher of bulk area coating with the not enough and existing Technology that solves existing solar selectively absorbing coating fabricating technology.
The production method of solar absorber plate of the present invention, adopting the croloy steel plate is body material, the chemical oxidation blackout by strong oxidizer is used for preparing solar energy thermal conversion film (solar energy absorbing coating), thus the production solar absorber plate.
The chrome content of croloy steel plate is 5～18%,
Its concrete production stage is as follows:
A, blackout pre-treatment: the blackout pre-treatment step of solar absorber plate comprises oil removing, polishing, activation and washing,
Rumbling compound is that the nitric acid that the sulfuric acid of 60～180g/L, hydrochloric acid that concentration is 10～80g/L and concentration are 7～28g/L is formed by concentration, and polish temperature is 30 ℃～50 ℃, and the time is 2min～3min; Polish temperature is unsuitable too high, and the too high words of temperature can be seen the obvious corrosion tendency.Also can adopt mechanical polishing to handle, and the painted speed of the sample after the sample after the mechanical polishing is than chemical rightenning is fast.
Degreaser is that the emulsifying agent that the sodium hydroxide of 20～40g/L, yellow soda ash that concentration is 35～60g/L and OP concentration are 2～5g/L is formed by concentration, and removing oil temperature is 60 ℃～70 ℃, and the oil removing time is 8min～12min.Oil removing must remove clean, otherwise, will do not go up black or painted inhomogeneous.
Activator is that concentration is the phosphoric acid of 30～100g/L, and activation temperature is a room temperature, and the time is 1min～3min.Because alloy steel plate can generate the thin oxide film of one deck at surface of polished, so need carry out activation treatment before painted, makes the steel alloy surface active, improves the bonding force of film and painted homogeneity.
B, oxidation blackout: will carry out the chemical oxidation blackout through the croloy steel plate after the pre-treatment and handle,
Oxidation blackout tinting material is that the ammonium nitrate that the nitric acid of 560～900g/L, manganous sulfate that concentration is 10～80g/L and concentration are 20～60g/L is formed by concentration; Oxidation blackout temperature is 70 ℃～90 ℃, and the time is 45～200min.
Nitric acid provides the strong oxidizing property environment, is painted active very strong [O] environment of making that turns black, and makes the Fe on steel alloy surface and the elements such as Ni of trace that complicated chemical reaction take place, and generates FeO, Fe
3O
4, Ni
2O
3Etc. the series black oxide compound, be attached to the steel alloy surface securely.Manganous sulfate is oxygenant in hair blackening liquid, is again the blackout membrane-forming agent, and manganous sulfate and ammonium nitrate reaction generate MnO
4 -Ion can increase the oxidisability of hair blackening liquid, simultaneously, or the oxygenant of Fe, Ni, they are oxidized to the oxidation products of black or grey black.When its content is higher, though can accelerate film forming speed, excessive erosion easily caused, produce a large amount of nitrogen peroxide simultaneously and contaminate environment; When content was on the low side, film forming speed was slow, and the work period is long, and energy loss is big.Ammonium ion can also be controlled response speed by complexing action, and content is higher, and it is too fast that film forms, and black is transient, is difficult to control color, and content is on the low side, complexing not the Ni that dissolves
2+, Cr
3+Plasma causes hair blackening liquid aging, and film forming speed is slack-off.
C, blackout aftertreatment: the croloy steel plate washing back that heat-tinting obtains is handled and chemical sealing treatment with solidifying agent, and slowly oven dry obtains solar absorber plate afterwards,
Solidifying agent is that 80～250g/L chromic anhydride and concentration are that 9～30g/L sulfuric acid is formed by concentration, and solidification value is 30 ℃～50 ℃, and the time is 5min～10min.Consider because the structure of black film may be the micropore shape, not wear-resisting, in order to remedy this defective, should handle with solidifying agent immediately after the washing of blackout part.
The chemistry confining liquid is that 2～4% water glass and mass percent are that 0.5% tensio-active agent is formed by mass percent, and the temperature of sealing treatment is 90 ℃～100 ℃, and the time is 5min～6min.
The main purpose of sealing treatment is in order to make the blackout part not influence its performance in the air because of being exposed to.
The present invention compares with the production method (CN101012558A) at a kind of solar energy optical-thermal conversion material of first to file, and the difference of maximum of the present invention is:
1, the selected absorber plate body material of the present invention does not require manganese content, material can not contain manganese element fully, and in the production method (CN101012558A) of a kind of solar energy optical-thermal conversion material of first to file, chemical ingredients to chromium alloyed steel has strict demand, and manganese content requires 0.5%～17%;
2, in the production method of solar absorber plate of the present invention, the oxidation blackening agent for surface adopts nitric acid, manganous sulfate and ammonium nitrate, and it is very fast that production method black oxide film of the present invention forms speed, and the hair blackening liquid life cycle is longer.
The technique effect that the present invention brings has the following aspects:
1, the solar absorber plate that utilizes the present invention to produce, the chemically blackening film that obtains has higher specific absorption and lower emittance, and thermal energy conversion efficiency is higher;
2, the solar absorber plate that utilizes the present invention to produce, black film has good abrasion resistance and corrosion resistance, carries out the wear resistance experiment by GB1768-79, rubber wheel pressurization 500g, test 2min, the rete color is constant substantially; Sample after will turning black by GB1771-79 carries out the experiment of neutral salt spray erosion resistance, and 100h rete color and luster does not have considerable change.
3, utilize the present invention to produce solar absorber plate, operational path is brief, low production cost, continuous popularization along with China's solar energy utilization technique, rural area solar heating technical prospect is wide, adopts the present invention to produce solar absorber plate, the preparation flat-plate solar heat collector, inexpensive and efficient, can be the rural area and realize that solar heating provides bright development prospect.
4, because the present invention adopts the chrome-bearing alloy steel plate to be body material, cheap and easy to get, and solidity to corrosion is good, and the life-span is longer.
Embodiment
The following examples can further specify the present invention, but do not limit the present invention in any way.
Embodiment 1:
The chemical ingredients of Chrome metal powder steel plate to be colored: C 0.34%; Cr17.95%;
Implement painted according to following steps:
1, chromium alloyed steel is carried out oil removing, degreaser is made up of 35g/L sodium hydroxide, 48g/L yellow soda ash and 3g/LOP emulsifying agent.Removing oil temperature is 68 ℃, and the oil removing time is 10min.
2, with after the washing of the alloy steel plate after the oil removing, carry out chemical rightenning and handle.The prescription of used rumbling compound is sulfuric acid 160g/L, hydrochloric acid 36g/L, nitric acid 9g/L.Polish temperature is 40 ℃, and the time is 2min.
3, with after the washing of the alloy steel plate after the chemical rightenning, carry out activation treatment.The prescription of used activator is a 82g/L phosphoric acid.Activation temperature is a room temperature, and the time is 2min.
4, after the washing of the alloy steel plate after will activating, carry out the chemical oxidation blackout and handle.Used oxidation blackout tinting material is 860g/L nitric acid, 75g/L manganous sulfate and 35g/L ammonium nitrate.Oxidation blackout temperature is 90 ℃, begins improvement behind the 20min, and the 35min blackness begins to deepen, and obtains even aterrimus behind the 50min.
5, with after the washing of the alloy steel plate after painted, handle with solidifying agent.Used solidifying agent is the 200g/L chromic anhydride, 11g/L sulfuric acid.Solidification value is 45 ℃, and the time is 8min.
6, after the washing of the alloy steel plate after will solidifying, carry out chemical sealing treatment.The massfraction that consists of of used chemical confining liquid is that 2% water glass and massfraction are 0.5% tensio-active agent.The temperature of sealing treatment is 90 ℃, and the time is 5min.
7, after the washing of the alloy steel plate after will solidifying, oven dry obtains the surface and presents the quarry-faced solar absorber plate of even aterrimus.
After tested, this solar absorber plate thermal absorptivity is 94%, and thermal emissivity is 30%.
Embodiment 2:
The chemical ingredients of Chrome metal powder steel plate to be colored: C 0.21%; Cr17.20%;
Implement painted according to following steps:
1, chromium alloyed steel is carried out oil removing, degreaser is made up of 35g/L sodium hydroxide, 48g/L yellow soda ash and 3g/LOP emulsifying agent.Removing oil temperature is 68 ℃, and the oil removing time is 10min.
2, with after the washing of the alloy steel plate after the oil removing, carry out chemical rightenning and handle.The prescription of used rumbling compound is sulfuric acid 160g/L, hydrochloric acid 36g/L, nitric acid 28g/L.Polish temperature is 50 ℃, and the time is 2min.
3, with after the washing of the alloy steel plate after the chemical rightenning, carry out activation treatment.The prescription of used activator is a 82g/L phosphoric acid.Activation temperature is a room temperature, and the time is 2min.
4, after the washing of the alloy steel plate after will activating, carry out the chemical oxidation blackout and handle.Used oxidation blackout tinting material is 560g/L nitric acid, 80g/L manganous sulfate and 20g/L ammonium nitrate.Oxidation blackout temperature is 80 ℃, begins improvement behind the 30min, and the 45min blackness begins to deepen, and obtains even aterrimus behind the 60min.
5, with after the washing of the alloy steel plate after painted, handle with solidifying agent.Used solidifying agent is the 250g/L chromic anhydride, 9g/L sulfuric acid.Solidification value is 45 ℃, and the time is 8min.
6, after the washing of the alloy steel plate after will solidifying, carry out chemical sealing treatment.The massfraction that consists of of used chemical confining liquid is that 2% water glass and massfraction are 0.5% tensio-active agent.The temperature of sealing treatment is 90 ℃, and the time is 5min.
7, after the washing of the alloy steel plate after will solidifying, oven dry obtains the surface and presents even black solar absorber plate.
After tested, this solar absorber plate thermal absorptivity is 91%, and thermal emissivity is 25%.
Embodiment 3:
The chemical ingredients of Chrome metal powder steel plate to be colored: C 0.27%; Cr15.43%;
Implement painted according to following steps:
1, chromium alloyed steel is carried out oil removing, degreaser is made up of 35g/L sodium hydroxide, 48g/L yellow soda ash and 3g/LOP emulsifying agent.Removing oil temperature is 68 ℃, and the oil removing time is 10min.
2, with after the washing of the alloy steel plate after the oil removing, carry out chemical rightenning and handle.The prescription of used rumbling compound is sulfuric acid 68g/L, hydrochloric acid 26g/L, nitric acid 7g/L.Polish temperature is 35 ℃, and the time is 2min.
3, with after the washing of the alloy steel plate after the chemical rightenning, carry out activation treatment.The prescription of used activator is a 65g/L phosphoric acid.Activation temperature is a room temperature, and the time is 2min.
4, after the washing of the alloy steel plate after will activating, carry out the chemical oxidation blackout and handle.Used oxidation blackout tinting material is 820g/L nitric acid, 60g/L manganous sulfate and 55g/L ammonium nitrate.Oxidation blackout temperature is 85 ℃, begins improvement behind the 25min, and the 35min blackness begins to deepen, and obtains even ater behind the 45min.
5, with after the washing of the alloy steel plate after painted, handle with solidifying agent.Used solidifying agent is the 150g/L chromic anhydride, 23g/L sulfuric acid.Solidification value is 45 ℃, and the time is 6min.
6, after the washing of the alloy steel plate after will solidifying, carry out chemical sealing treatment.The massfraction that consists of of used chemical confining liquid is that 3% water glass and massfraction are 0.5% tensio-active agent.The temperature of sealing treatment is 90 ℃, and the time is 5min.
7, after the washing of the alloy steel plate after will solidifying, oven dry obtains the surface and presents even ater solar absorber plate.
After tested, this solar absorber plate thermal absorptivity is 92%, and thermal emissivity is 23%.
Embodiment 4:
The chemical ingredients of Chrome metal powder steel plate to be colored: C 0.15%; Cr13.43%;
Implement painted according to following steps:
1, chromium alloyed steel is carried out oil removing, degreaser is made up of 20g/L sodium hydroxide, 35g/L yellow soda ash and 2g/LOP emulsifying agent.Removing oil temperature is 68 ℃, and the oil removing time is 10min.
2, with after the washing of the alloy steel plate after the oil removing, carry out chemical rightenning and handle.The prescription of used rumbling compound is sulfuric acid 68g/L, hydrochloric acid 80g/L, nitric acid 7g/L.Polish temperature is 35 ℃, and the time is 2min.
3, with after the washing of the alloy steel plate after the chemical rightenning, carry out activation treatment.The prescription of used activator is a 100g/L phosphoric acid.Activation temperature is a room temperature, and the time is 2min.
4, after the washing of the alloy steel plate after will activating, carry out the chemical oxidation blackout and handle.Used oxidation blackout tinting material is 620g/L nitric acid, 60g/L manganous sulfate and 28g/L ammonium nitrate.Oxidation blackout temperature is 80 ℃, begins improvement behind the 30min, and the 50min blackness begins to deepen, and obtains even bright black behind the 90min.
5, with after the washing of the alloy steel plate after painted, handle with solidifying agent.Used solidifying agent is the 80g/L chromic anhydride, 30g/L sulfuric acid.Solidification value is 45 ℃, and the time is 6min.
6, after the washing of the alloy steel plate after will solidifying, carry out chemical sealing treatment.The massfraction that consists of of used chemical confining liquid is 3% Na
2SiO
3With massfraction be 0.5% tensio-active agent.The temperature of sealing treatment is 90 ℃, and the time is 5min.
7, after the washing of the alloy steel plate after will solidifying, oven dry obtains the surface and presents even bright black solar absorber plate.
After tested, this solar absorber plate thermal absorptivity is 89%, and thermal emissivity is 20%.
Embodiment 5:
The chemical ingredients of Chrome metal powder steel plate to be colored: C 0.18%; Cr8.35%;
Implement painted according to following steps:
1, chromium alloyed steel is carried out oil removing, degreaser is made up of 40g/L sodium hydroxide, 60g/L yellow soda ash and 5g/LOP emulsifying agent.Removing oil temperature is 60 ℃, and the oil removing time is 10min.
2, with after the washing of the alloy steel plate after the oil removing, carry out chemical rightenning and handle.The prescription of used rumbling compound is sulfuric acid 60g/L, hydrochloric acid 12g/L, nitric acid 7g/L.Polish temperature is 30 ℃, and the time is 2min.
3, with after the washing of the alloy steel plate after the chemical rightenning, carry out activation treatment.The prescription of used activator is a 35g/L phosphoric acid.Activation temperature is a room temperature, and the time is 1min.
4, after the washing of the alloy steel plate after will activating, carry out the chemical oxidation blackout and handle.Used oxidation blackout tinting material is 900g/L nitric acid, 70g/L manganous sulfate and 55g/L ammonium nitrate.Oxidation blackout temperature is 78 ℃, begins improvement behind the 15min, and the 25min blackness begins to deepen, and obtains even ater behind the 45min.
5, with after the washing of the alloy steel plate after painted, handle with solidifying agent.Used solidifying agent is the 200g/L chromic anhydride, 15g/L sulfuric acid.Solidification value is 30 ℃, and the time is 5min.
6, after the washing of the alloy steel plate after will solidifying, carry out chemical sealing treatment.The massfraction that consists of of used chemical confining liquid is 3%Na
2SiO
3With massfraction be 0.5% tensio-active agent.The temperature of sealing treatment is 95 ℃, and the time is 6min.
7, after the washing of the alloy steel plate after will solidifying, oven dry obtains the surface and presents even ater solar absorber plate.
After tested, this solar absorber plate thermal absorptivity is 93%, and thermal emissivity is 28%.
Embodiment 6:
The chemical ingredients of Chrome metal powder steel plate to be colored: C 0.06%; Cr5.21%;
Implement painted according to following steps:
1, chromium alloyed steel is carried out oil removing, degreaser is made up of 35g/L sodium hydroxide, 48g/L yellow soda ash and 3g/LOP emulsifying agent.Removing oil temperature is 70 ℃, and the oil removing time is 10min.
2, with after the washing of the alloy steel plate after the oil removing, carry out chemical rightenning and handle.The prescription of used rumbling compound is sulfuric acid 60g/L, hydrochloric acid 10g/L, nitric acid 7g/L.Polish temperature is 30 ℃, and the time is 3min.
3, with after the washing of the alloy steel plate after the chemical rightenning, carry out activation treatment.The prescription of used activator is a 30g/L phosphoric acid.Activation temperature is a room temperature, and the time is 3min.
4, after the washing of the alloy steel plate after will activating, carry out the chemical oxidation blackout and handle.Used oxidation blackout tinting material is 780g/L nitric acid, 10g/L manganous sulfate and 60g/L ammonium nitrate.Oxidation blackout temperature is 70 ℃, begins improvement behind the 55min, and the 90min blackness begins to deepen, and obtains even bright black behind the 120min, and 200min obtains even bright black.
5, with after the washing of the alloy steel plate after painted, handle with solidifying agent.Used solidifying agent is the 200g/L chromic anhydride, 15g/L sulfuric acid.Solidification value is 50 ℃, and the time is 10min.
6, after the washing of the alloy steel plate after will solidifying, carry out chemical sealing treatment.The massfraction that consists of of used chemical confining liquid is 3% Na
2SiO
3With massfraction be 0.5% tensio-active agent.The temperature of sealing treatment is 100 ℃, and the time is 5min.
7, after the washing of the alloy steel plate after will solidifying, oven dry obtains the surface and presents even bright black solar absorber plate.
After tested, this solar absorber plate thermal absorptivity is 82%, and thermal emissivity is 32%.
Utilize solar absorber plate that this technology produces in the solar energy drying booth of local one tame fruit juice factory, to use, the making method of the solar energy air heat collector absorber plate that this fruit juice factory adopted in the past is the pitch-dark coating that adds charcoal of brushing one deck on common alloy steel plate, the solar absorber plate collecting efficiency that this method is produced is low, the more important thing is that absorber plate is coated comes off easily, has had a strong impact on the life-span and the drying efficiency of air collector.
After adopting the absorber plate of the technology of the present invention production, its drying efficiency is greatly improved.Method is that air collector series connection and mode in parallel are sent hot blast into moisture eliminator, thereby will produce the raw material-matrimony vine drying of fruit juice, not only economy but also environmental protection, and the nutritive value of matrimony vine do not had any impact.
We have done simultaneous test: the solar energy air heat collector drying machine of selecting 2 same sizes, adopt the absorber plate of squeegee process production and the absorber plate that the technology of the present invention embodiment 3 produces respectively, place a thermometer respectively at the gas outlet of solar energy air heat collector, the record temperature variation, its test effect is as follows:
Testing location: Gansu Province's Zhangye
Test duration: on October 15th, 2009
Test result
By above test result, as seen, the solar absorber plate that adopts the technology of the present invention to produce is compared with the absorber plate that squeegee process is produced, and the solar heat efficiency of conversion is higher, and Heat-collecting effect is obvious.
Claims (5)
1. the production method of a solar absorber plate, matrix used material is the croloy steel plate, it is characterized in that: the chrome content of croloy steel plate is 5～18%,
Its concrete production stage is as follows:
A, blackout pre-treatment: the blackout pre-treatment step of solar absorber plate comprises with degreaser oil removing, polishing, activates and washing with activator,
Rumbling compound is that the nitric acid that the sulfuric acid of 60～180g/L, hydrochloric acid that concentration is 10～80g/L and concentration are 7～28g/L is formed by concentration, and polish temperature is 30 ℃～50 ℃, and the time is 2min～3min;
B, oxidation blackout: will carry out the chemical oxidation blackout through the croloy steel plate after the pre-treatment and handle,
Oxidation blackout tinting material is that the ammonium nitrate that the nitric acid of 560～900g/L, manganous sulfate that concentration is 10～80g/L and concentration are 20～60g/L is formed by concentration;
C, blackout aftertreatment: the croloy steel plate washing back that heat-tinting obtains is handled and chemical sealing treatment with solidifying agent, and slowly oven dry obtains solar absorber plate afterwards,
The chemistry confining liquid is that 2～4% water glass and mass percent are that 0.5% tensio-active agent is formed by mass percent, and the temperature of sealing treatment is 90 ℃～100 ℃, and the time is 5min～6min.
2. the production method of a kind of solar absorber plate according to claim 1, it is characterized in that: the described degreaser of steps A is that the emulsifying agent that the sodium hydroxide of 20～40g/L, yellow soda ash that concentration is 35～60g/L and OP concentration are 2～5g/L is formed by concentration, removing oil temperature is 60 ℃～70 ℃, and the oil removing time is 8min～12min.
3. the production method of a kind of solar absorber plate according to claim 1 and 2 is characterized in that the described activator of steps A is that concentration is the phosphoric acid of 30～100g/L, and activation temperature is a room temperature, and the time is 1min～3min.
4. the production method of a kind of solar absorber plate according to claim 3 is characterized in that the described oxidation blackout of step B temperature is 70 ℃～90 ℃, and the time is 45～200min.
5. the production method of a kind of solar absorber plate according to claim 4, it is characterized in that the described solidifying agent of step C is that 80～250g/L chromic anhydride and concentration are that 9～30g/L sulfuric acid is formed by concentration, solidification value is 30 ℃～50 ℃, and the time is 5min～10min.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105525318A (en) * | 2016-01-18 | 2016-04-27 | 苏州市华婷特种电镀有限公司 | Method for pretreating to-be-plated part in electroplating process |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1258760A (en) * | 1999-12-30 | 2000-07-05 | 上海交通大学 | Black inactivation process for zinc-nickel alloy coating |
| CN101012558A (en) * | 2007-02-05 | 2007-08-08 | 汪 | Production method of solar energy optical-thermal conversion material |
| WO2008107039A1 (en) * | 2007-03-05 | 2008-09-12 | Atotech Deutschland Gmbh | Chromium(vi)-free black passivation of surfaces containing zinc |
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2010
- 2010-05-04 CN CN2010101653420A patent/CN101818374B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1258760A (en) * | 1999-12-30 | 2000-07-05 | 上海交通大学 | Black inactivation process for zinc-nickel alloy coating |
| CN101012558A (en) * | 2007-02-05 | 2007-08-08 | 汪 | Production method of solar energy optical-thermal conversion material |
| WO2008107039A1 (en) * | 2007-03-05 | 2008-09-12 | Atotech Deutschland Gmbh | Chromium(vi)-free black passivation of surfaces containing zinc |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105525318A (en) * | 2016-01-18 | 2016-04-27 | 苏州市华婷特种电镀有限公司 | Method for pretreating to-be-plated part in electroplating process |
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| CN101818374B (en) | 2011-06-08 |
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