CN104209251B - A kind of enamel workpiece sprays the manufacture method that fluorine is moulded outward - Google Patents
A kind of enamel workpiece sprays the manufacture method that fluorine is moulded outward Download PDFInfo
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- CN104209251B CN104209251B CN201410408012.8A CN201410408012A CN104209251B CN 104209251 B CN104209251 B CN 104209251B CN 201410408012 A CN201410408012 A CN 201410408012A CN 104209251 B CN104209251 B CN 104209251B
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Abstract
The invention provides a kind of enamel workpiece and spray the manufacture method that fluorine moulds outward, it is characterized in that: this manufacture method comprises the following steps: step 1, thoroughly blasting treatment is cleared up to metal body surface, secondly at the uniform porcelain glaze coating of surperficial enamel firing thickness; Step 2, moulds layer at the uniformly spraying fluorine of enamel workpiece, and described fluorine is moulded layer and is divided into bed material, middle material and fabric, is sprayed on the surface of enamel workpiece successively; Step 3, cleaning surface, and do the test of 20kv electrion, prepared by workpiece.This method Applicable media preparing workpiece is more extensive, and improve temperature difference sudden turn of events scope, anti-medium permeability is excellent, long service life, and cost is lower waits significant advantage; The PFA coating of surface spraying, can make up the defects such as the nd dark bubble of glass-lined equipment, pin hole; Also increase the cold-hot temperature difference shock property of equipment, the equipment that reduces causes the danger of enamel burst porcelain because of the temperature difference sudden turn of events.
Description
Technical field
The invention belongs to chemical anticorrosion technical field, be specifically related to a kind of enamel workpiece and spray the manufacture method that fluorine moulds outward.
Background technology
Equipment conventional in Chemical Manufacture, such as reactor, storage tank, measuring tank etc., and major part is corrosivity reaction medium, the production equipment needed also should have good corrosion resistance, the materials such as general employing lining fluorine, lining are moulded, enamel, rare alloy solve corrosion-resistant problem, and glass-lined equipment due to its cost low, purposes is wide, is one of the most frequently used at present chemical anticorrosion apparatus.Shape matching is complicated, particularly tower internals and similar parts, usually adopts the method for spraying fluorine material (such as PFA) to solve corrosion-resistant problem.
But adopt the chemical industry equipment that single technique makes, such as glass-lined equipment or spraying fluorine material installation, due to its inherent characteristic, also there are the following problems:
1, there are the following problems for glass-lined equipment:
1) cold-hot temperature difference acute degeneration is poor, regulation thermal shock≤120 DEG C in GB25025 " glass-lined equipment technical conditions ", cold shock≤110 DEG C;
2) can not alkali-proof medium, hydrofluoric acid etc. and SiO
2the chemical substance reacted, high temperature hydrochloric acid, high temperature SPA etc. also have stronger corrosivity to it;
3) easily there is the defect that dark bubble, pin hole etc. not easily detect in glass-lined coating, in use for some time, after the glass-lined coating on surface corrodes by material, causes defect to expose directly and medium contact, and equipment is corroded inefficacy.
2, the equipment of fluorine material (such as PFA etc.) is sprayed, its antiseptic property, peeling resistance, compactness are all fine, but because the Thickness Ratio of spraying is thinner, be generally about 0.8 ~ 1.2mm, agitator is in longtime running, medium to its continuous print wash away with, very large to coating abrasion, service life is shorter, and in addition, medium also exists sprayed coating and constantly infiltrates infiltration, if coating is too thin, along with the prolongation of time, there will be material and infiltrate into equipment steel billet place, and cause the phenomenons such as coating bubbling, stripping.Therefore, spraying equipment needs to consider wearability and impermeable reason, coating must at about 1mm, and it is all external imported material that the spraying fluorine used moulds raw material, expensive, and the thickness of each spraying is within 0.1mm, reach the thickness of regulation, must repeatedly spray and sinter, the spent artificial and electricity charge be also very many, therefore spray the fluorine cost of moulding also very high, limit its scope of application.
Summary of the invention
Technical problem to be solved:
The present invention is directed to above-mentioned defect, the manufacture method providing a kind of enamel workpiece to spray fluorine outward to mould, can give full play to enamel and fluorine material feature separately, effectively combine.
Technical scheme:
In order to realize above function, the invention provides a kind of enamel workpiece and spraying the manufacture method that fluorine moulds outward, it is characterized in that: this manufacture method comprises the following steps:
Step 1, thoroughly clears up blasting treatment to metal body surface, secondly at the porcelain glaze coating that surperficial enamel firing thickness is uniform;
Step 2, moulds layer at the uniformly spraying fluorine of enamel workpiece, and described fluorine is moulded layer and is divided into bed material, middle material and fabric, is sprayed on the surface of enamel metal works successively;
Step 3, cleaning surface, and do the test of 20kv electrion, prepared by workpiece.
Further, the detailed process of described step 2 is:
Step 2.1, the surface of enamel workpiece uniformly sprays bed material, and the THICKNESS CONTROL of described bed material, between 3 ~ 10 μm, sinters after drying, and sintering temperature controls at 300 ~ 400 DEG C, and sintering time is 1.5 ~ 2 hours;
Step 2.2, in the middle of described, material coating thickness is 200 ~ 350 μm, and sintering temperature controls between 300 ~ 380 DEG C;
Step 2.3, finally the spray-coating surface bed of material again, thickness is 10 ~ 20 μm, sinters after drying, and sintering temperature controls between 300 ~ 380 DEG C, and sintering time 1.5 ~ 2 hours is spraying coating process and terminates after completing.
Further, in described step 2.2, the gradation of middle material sprays, and the thickness of every layer of spraying is 60 ~ 120 μm, and sintering temperature controls between 300 ~ 380 DEG C, and the sintering time of every layer 2 ~ 3 hours, till reaching specific thickness.
It is PFA coating that described fluorine moulds layer.
Further, after step 1 terminates, carry out blasting treatment to enamel surface of the work, increase the roughness of surface of the work, making fluorine mould bed material well can adhere to enamel surface of the work.
Described porcelain glaze coating thickness is 0.8 ~ 2.0mm.
Further, described porcelain glaze coating is divided into ground-coat enamel and cover-coat enamel, and the thickness of ground-coat enamel, within 0.4mm, does and sprays enamel firing successively, and cover-coat enamel does 3 ~ 5 spraying enamel firings.
Beneficial effect:
A kind of combination process provided by the invention, the fluorine material of one deck 250 ~ 350 μm is sprayed again on the enamel surface of glass-lined equipment, give full play to enamel and fluorine material feature separately, effectively combine, and compensate for respective shortcoming, there is antiseptic property good, Applicable media is more extensive, and improve temperature difference sudden turn of events scope, anti-medium permeability is excellent, long service life, cost is lower waits significant advantage.
The spraying fluorine that the present invention adopts moulds layer, combines closely, forms good corrosion-resistant protective layer, can well adapt in the medium that the non-serviceable alkaline medium of glass-lined equipment, fluoro-containing medium, high temperature phosphoric acid and other corrosivity are extremely strong with glass-lined equipment.
Equipment bottom has had enamel anti-corrosion layer, can tolerate infiltration and the corrosion of most corrosive medium, and equipment is after the running long period, if wearing and tearing appear in the PFA coating on surface, again can carry out spraying reparation very easily.Therefore, during outer surface spraying PFA anticorrosive coat, thickness can be much thinner than the coating of the single spraying workpiece of routine, greatly reduces cost.The PFA coating of surface spraying, can make up the defects such as the nd dark bubble of glass-lined equipment, pin hole, stops the corrosion of medium, the service life of extension device.The effect that isolated medium directly contacts with enamel can also be played, and the thermal conductivity factor of PFA coating is very poor, intercepted the heat trnasfer of medium and glass-lined equipment, therefore greatly can increase the cold-hot temperature difference shock property of equipment, the equipment that reduces causes the danger of enamel burst porcelain because of the temperature difference sudden turn of events.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, the present invention is further described:
Fig. 1 is the Workpiece structure schematic diagram adopting the manufacture method of enamel workpiece of the present invention to prepare.
Detailed description of the invention
The invention provides a kind of manufacture method of enamel workpiece, for making object of the present invention, clearly, clearly, and the present invention is described in more detail with reference to accompanying drawing examples for technical scheme and effect.Should be appreciated that concrete enforcement described herein is only in order to explain the present invention, is not intended to limit the present invention.
Enamel workpiece sprays the manufacture method that fluorine is moulded outward, it is characterized in that: this manufacture method comprises the following steps:
Step 1, thoroughly clears up blasting treatment to metal body surface, secondly at the porcelain glaze coating that surperficial enamel firing thickness is uniform;
Step 2, moulds layer at the uniformly spraying fluorine of enamel workpiece, and described fluorine is moulded layer and is divided into bed material, middle material and fabric, is sprayed on the surface of enamel metal works successively;
Step 3, cleaning surface, and do the test of 20kv electrion, prepared by workpiece.
Further, the detailed process of described step 2 is:
Step 2.1, the surface of enamel workpiece uniformly sprays bed material, and the THICKNESS CONTROL of described bed material, between 3 ~ 10 μm, sinters after drying, and sintering temperature controls at 300 ~ 400 DEG C, and sintering time is 1.5 ~ 2 hours;
Step 2.2, in the middle of described, material coating thickness is 200 ~ 350 μm, and sintering temperature controls between 300 ~ 380 DEG C;
Step 2.3, finally the spray-coating surface bed of material again, thickness is 10 ~ 20 μm, sinters after drying, and sintering temperature controls between 300 ~ 380 DEG C, and sintering time 1.5 ~ 2 hours is spraying coating process and terminates after completing.
Further, in described step 2.2, the gradation of middle material sprays, and the thickness of every layer of spraying is 60 ~ 120 μm, and sintering temperature controls between 300 ~ 380 DEG C, and the sintering time of every layer 2 ~ 3 hours, till reaching specific thickness.
It is PFA coating that described fluorine moulds layer.
Further, after step 1 terminates, carry out blasting treatment to enamel surface of the work, increase the roughness of surface of the work, making fluorine mould bed material well can adhere to enamel surface of the work.
Described glass-lined coating thickness is 0.8 ~ 2.0mm.
Further, described glass-lined coating is divided into ground-coat enamel and cover-coat enamel, and the thickness of ground-coat enamel, within 0.4mm, does and sprays enamel firing successively, and cover-coat enamel does 3 ~ 5 spraying enamel firings.
Glass-lined equipment is first carried out surface sand-blasting process by the present invention, and smooth enamel surface treatment is become coarse state, and like this when spraying, bed material well can infiltrate into the concavo-convex place on enamel surface, to realize firmly being attached to enamel on the surface.By spraying coating process, coating thickness is 250 ~ 400 μm of fluor resin coatings.The workpiece of Typical spray, consider the factors such as wearing and tearing, anticorrosion, coating thickness is generally 800 ~ 1200 μm of fluor resin coatings, and how a lot of the fluororesin of use is, and the price comparison of spraying fluororesin is high, and coating is thicker, the pass of spraying and sintering is also more, and operating expenses and the electricity charge also increase a lot, and therefore cost is also very high, reduce the use amount of fluororesin in the present invention, mean and greatly reduce product cost.
Fluor resin coating is divided into again bed material, middle material and fabric three kind, and the effect of bed material has good adhesive force with enamel surface, has middlely expected linking effect, and fabric plays anticorrosion, impermeable.Spraying fluorine moulds layer, combines closely, forms good corrosion-resistant protective layer, can well adapt in the medium that the non-serviceable alkaline medium of glass-lined equipment, fluoro-containing medium, high temperature phosphoric acid and other corrosivity are extremely strong with glass-lined equipment.
Equipment bottom has had enamel anti-corrosion layer, can tolerate infiltration and the corrosion of most corrosive medium, and equipment is after the running long period, if wearing and tearing appear in the PFA coating on surface, again can carry out spraying reparation very easily.Therefore, during outer surface spraying PFA anticorrosive coat, thickness can be much thinner than the coating of the single spraying workpiece of routine, greatly reduces cost.The PFA coating of surface spraying, can make up the defects such as the nd dark bubble of glass-lined equipment, pin hole, stops the corrosion of medium, the service life of extension device.The effect that isolated medium directly contacts with enamel can also be played, and the thermal conductivity factor of PFA coating is very poor, intercepted the heat trnasfer of medium and glass-lined equipment, therefore greatly can increase the cold-hot temperature difference shock property of equipment, the equipment that reduces causes the danger of enamel burst porcelain because of the temperature difference sudden turn of events.
Be understandable that, for those of ordinary skills, can be equal to according to technical scheme of the present invention and inventive concept thereof and replace or change, and all these change or replace the protection domain that all should belong to the claim appended by the present invention.
Claims (6)
1. enamel workpiece sprays the manufacture method that fluorine is moulded outward, it is characterized in that: this manufacture method comprises the following steps:
Step 1, thoroughly clears up blasting treatment to metal body surface, secondly at the uniform porcelain glaze coating of surperficial enamel firing thickness;
Step 2, moulds layer at the uniformly spraying fluorine of enamel workpiece, and described fluorine is moulded layer and is divided into bed material, middle material and fabric, is sprayed on the surface of enamel workpiece successively;
Step 3, cleaning surface, and do the test of 20kV electrion, prepared by workpiece;
The detailed process of described step 2 is:
Step 2.1, the surface of enamel workpiece uniformly sprays bed material, and the THICKNESS CONTROL of described bed material, between 3 ~ 10 μm, sinters after drying, and sintering temperature controls at 300 ~ 400 DEG C, and sintering time is 1.5 ~ 2 hours;
Step 2.2, in the middle of described, material coating thickness is 200 ~ 350 μm, and sintering temperature controls between 300 ~ 380 DEG C;
Step 2.3, finally the spray-coating surface bed of material again, thickness is 10 ~ 20 μm, sinters after drying, and sintering temperature controls between 300 ~ 380 DEG C, and sintering time 1.5 ~ 2 hours is spraying coating process and terminates after completing.
2. a kind of enamel workpiece according to claim 1 sprays the manufacture method that fluorine is moulded outward, it is characterized in that: in described step 2.2, the gradation of middle material sprays, the thickness of every layer of spraying is 60 ~ 120 μm, sintering temperature controls between 300 ~ 380 DEG C, the sintering time of every layer 2 ~ 3 hours, till reaching specific thickness.
3. a kind of enamel workpiece according to claim 2 sprays the manufacture method that fluorine is moulded outward, it is characterized in that: it is PFA coating that described fluorine moulds layer.
4. a kind of enamel workpiece according to claim 2 sprays the manufacture method that fluorine is moulded outward, it is characterized in that: after step 1 terminates, carry out blasting treatment to enamel surface of the work, increase the roughness of surface of the work, making fluorine mould bed material well can adhere to enamel surface of the work.
5. a kind of enamel workpiece according to claim 4 sprays the manufacture method that fluorine is moulded outward, it is characterized in that: described porcelain glaze coating thickness is 0.8 ~ 2.0mm.
6. a kind of enamel workpiece according to claim 5 sprays the manufacture method that fluorine is moulded outward, and it is characterized in that: described porcelain glaze coating is divided into ground-coat enamel and cover-coat enamel, the thickness of ground-coat enamel, within 0.4mm, does and sprays enamel firing successively, and cover-coat enamel does 3 ~ 5 spraying enamel firings.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410408012.8A CN104209251B (en) | 2014-08-19 | 2014-08-19 | A kind of enamel workpiece sprays the manufacture method that fluorine is moulded outward |
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| CN201410408012.8A CN104209251B (en) | 2014-08-19 | 2014-08-19 | A kind of enamel workpiece sprays the manufacture method that fluorine is moulded outward |
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| CN104209251A CN104209251A (en) | 2014-12-17 |
| CN104209251B true CN104209251B (en) | 2016-03-09 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN87100254A (en) * | 1987-01-07 | 1988-07-20 | 青岛化工学院 | The method for repairing and mending of enamel chemical equipment enamel lining |
| CN1041429A (en) * | 1988-09-23 | 1990-04-18 | 江苏省溧阳县特种风机厂 | Be used for the anti-corrosion spray technology on the blower fan |
| CN1793411A (en) * | 2005-11-24 | 2006-06-28 | 陈一鸣 | Spraying tech. for glass and application thereof |
| CN102182878A (en) * | 2011-05-04 | 2011-09-14 | 上海瑞亚安环保设备有限公司 | Novel corrosion-resistant composite tube |
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Effective date of registration: 20200407 Address after: 276800 north, 800m West, intersection of Shanghai Road and Lanzhou Road, Rizhao Economic and Technological Development Zone, Shandong Province Patentee after: Rizhao Zhengyuan Chemical Machinery Manufacturing Co., Ltd Address before: 210000, Jiangsu County, Nanjing City, Lishui province Baima town industrial concentration area Patentee before: NANJING ZHENGYUAN ENAMEL EQUIPMENT MANUFACTURING Co.,Ltd. |
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Effective date of registration: 20211214 Address after: 210000 Baima town industrial concentration area, Lishui County, Nanjing, Jiangsu Patentee after: NANJING ZHENGYUAN ENAMEL EQUIPMENT MANUFACTURING Co.,Ltd. Address before: 276800 north of 800m west of the intersection of Shanghai Road and Lanzhou Road, Rizhao Economic and Technological Development Zone, Shandong Province Patentee before: Rizhao Zhengyuan Chemical Machinery Manufacturing Co.,Ltd. |