CN1824717B - Anti corrosion paint for condenser - Google Patents
Anti corrosion paint for condenser Download PDFInfo
- Publication number
- CN1824717B CN1824717B CN2005100532926A CN200510053292A CN1824717B CN 1824717 B CN1824717 B CN 1824717B CN 2005100532926 A CN2005100532926 A CN 2005100532926A CN 200510053292 A CN200510053292 A CN 200510053292A CN 1824717 B CN1824717 B CN 1824717B
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- CN
- China
- Prior art keywords
- condenser
- pipe
- solidifying agent
- corrosion paint
- mouth
- Prior art date
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Abstract
The present invention discloses an anticorrosive coating for steam condenser. Its raw material composition includes (by wt%) 80-88% of phenol formaldehyde epoxy resin, 1-2% of dibutyl (0-)phthalate, 8-13% of solidifying agent and 3-8% of superfine ceramic powder.
Description
Affiliated technical field
The present invention relates to a kind of fine chemicals, relate to a kind of coating or rather.
Background technology
Condenser is one of important equipment in fuel-burning power plant, is a huge casing, and pipe can reach several ten thousand at most.Since the industrial pollution and the water scarcity of water quality, the raising of recirculated water concentration rate, and infiltration, the leakage of the erosion corrosion of the condenser tube sheet burn into mouth of pipe and the mouth that expands are the practical problemss that every condenser all exists.Pipe seepage phenomenon often takes place, and the vapour side that makes the water coolant that contains impurity enter condenser is sneaked in the clean condensed water, on the one hand the vacuum tightness of condenser is constantly changed, can be subjected to fouling on the face at boiler on the other hand, worsen and conduct heat, reduce the generating efficiency of system.The common way of head it off is to change the condenser pipe, and difficulty of construction is big, long in time limit, and maintenance and recondition expense are also high.
Summary of the invention
The object of the present invention is to provide a kind of anti corrosion paint for condenser, can prevent the corrosion of condenser tube sheet and the erosion corrosion of the mouth of pipe effectively, and expanded tube joint leakage and mouth of pipe seepage, condensed water water quality improved.
Draw technical scheme of the present invention through the test of for many years formulation for coating material, simulation brushing experiment, on-the-spot brushing experiment, the weight percent of its each raw material is respectively: novolac epoxy 84.5%, dibutyl phthalate 0.5%, solidifying agent 10%, ultrafine ceramic powder 5%; Described ultrafine ceramic powder is alumina powder jointed, median size 0.5 μ m-3 μ m.
Above-mentioned each raw material is the commercially available product of easily purchasing, and does not have special requirement, as long as reach relevant national standard.Novolac epoxy, general epoxy equivalent (weight) is between 150-185g/eq: dibutyl phthalate, molecular formula C
16H
22O
4, mainly plaing increases the flexible effect; Solidifying agent is selected 593 solidifying agent commonly used for use, T31 solidifying agent, 650 solidifying agent, 651 solidifying agent, 810 solidifying agent, ketoimine solidifying agent etc., and viscosity (25 ℃ of mpds) 80～150, amine value 500～700 best plays adhering and solidifying agent effect.
Its compound method is as follows:
At first stir the novolac epoxy raw material, add solidifying agent, stir evenly; Add ultrafine ceramic powder again, fully stir; Add dibutyl phthalate at last, stir evenly the back and can use in static slaking 20-30 minute.
Coating of the present invention has under condenser water side ring border life-time service and prevents expanded tube joint leakage, prevents the various performances that mouth of pipe erosion corrosion and tube sheet galvanic corrosion are required.Through the coating of construction, heat-resisting water, acid and alkali-resistance, salt fog, wet goods chemical; Wear-resistant, shock-resistant, anti-hydrolysis, ageing-resistant; Coating can guarantee more than 6 years not bubbling, not chap, do not come off.Can under the condition of 1000c, use, brass alloys, corronel, carbon steel, stainless steel and the material of admiring are all had very strong sticking power.
Embodiment
The solidifying agent that takes by weighing 10kg by weight adds in the novolac epoxy of 84.5kg and fully stirs, the ultrafine ceramic powder that adds 5kg again, continue to stir, add the dibutyl phthalate of 0.5kg at last, stir the static slaking in back and just can use in 20 1 30 minutes.
The key technical indexes of the coating that obtains like this is: be 1 grade to brass, ambrose alloy pipe, carbon steel, stainless steel and the sticking power of admiring 1; 2, water-fast (100 ℃)＞80 days; 3, snappiness: 1 grade; 4, acidproof (room temperature, 5%HCI)＞12 day; 5, intensity height, antiscour; 6, good seal performance.
Concrete application technology flow process:
1, the inner cleaning of condenser guarantees every copper pipe and tube sheet cleaning.
2, utilize pressurized air, every pipe, the tube sheet of condenser dried up.
3, utilize 0.1-0.6MPa pressurized air and steel sand, tube sheet is carried out derusting by sandblast, with the skin plug mouth of pipe is stopped up before the sandblast, the tube sheet after the sandblast requires to see the metal true qualities, and sandblast is finished, and takes down stopper.
4, utilize the metallic brush line up to remove surface oxide layer.
5, utilize acetone line up and tube sheet to clean, remove the dust and the oil stain of the tube sheet and the mouth of pipe.
6, tube sheet carries out the first layer coating, requires not have obviously to hang flow phenomenon, adopts tungsten-iodine lamp that coating is dried.
7, tube sheet carries out second layer coating, and the mouth of pipe carries out the first layer coating (mouth of pipe extend internally 10CM) coat side dries.
8, tube sheet carries out the 3rd layer, the mouth of pipe second coating.
9, tube sheet carries out the 4th layer, the mouth of pipe three-layer coated (dark 2-3CM), and coat side is dried.
After the construction end,, check that the mouth of pipe has or not the seepage phenomenon,, and repair as the discovery leak source by using the manufacturer's examination and the condenser water test routinely.
Adopt above-mentioned construction technology, can reach more than 6 years work-ing life.
Claims (2)
1. an anti corrosion paint for condenser is characterized in that the weight percent of each raw material is respectively: novolac epoxy 84.5%, dibutyl phthalate 0.5%, solidifying agent 10%, ultrafine ceramic powder 5%; Described ultrafine ceramic powder is alumina powder jointed, median size 0.5 μ m-3 μ m.
2. the application of anti corrosion paint for condenser as claimed in claim 1 on condenser is anticorrosion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2005100532926A CN1824717B (en) | 2005-02-25 | 2005-02-25 | Anti corrosion paint for condenser |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2005100532926A CN1824717B (en) | 2005-02-25 | 2005-02-25 | Anti corrosion paint for condenser |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1824717A CN1824717A (en) | 2006-08-30 |
| CN1824717B true CN1824717B (en) | 2010-04-14 |
Family
ID=36935564
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2005100532926A Expired - Fee Related CN1824717B (en) | 2005-02-25 | 2005-02-25 | Anti corrosion paint for condenser |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1824717B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111518497A (en) * | 2020-05-19 | 2020-08-11 | 河北冀研能源科学技术研究院有限公司 | Anticorrosion adhesive for tube plate of seawater cooling condenser of power plant and use method thereof |
| CN111895849A (en) * | 2020-07-31 | 2020-11-06 | 华能国际电力股份有限公司日照电厂 | Anticorrosion and antiseep method for expansion joint of pipe plate and pipe orifice in water chamber of steam turbine condenser |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN87107902A (en) * | 1987-11-17 | 1988-09-07 | 鞍山钢铁公司 | A kind of carborundum coating that improves fan efficiency |
| CN1212269A (en) * | 1997-09-24 | 1999-03-31 | 曲树蓁 | Wear-resisting corrosion-resisting coating |
| CN1225380A (en) * | 1998-12-29 | 1999-08-11 | 中国科学院兰州化学物理研究所 | Phenolic and epoxy, high wear resistance coatings |
| CN1519282A (en) * | 2003-01-25 | 2004-08-11 | 赵东楼 | Speical coating material for sealing and antisepticising tube plate and nose of condenser |
-
2005
- 2005-02-25 CN CN2005100532926A patent/CN1824717B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN87107902A (en) * | 1987-11-17 | 1988-09-07 | 鞍山钢铁公司 | A kind of carborundum coating that improves fan efficiency |
| CN1212269A (en) * | 1997-09-24 | 1999-03-31 | 曲树蓁 | Wear-resisting corrosion-resisting coating |
| CN1225380A (en) * | 1998-12-29 | 1999-08-11 | 中国科学院兰州化学物理研究所 | Phenolic and epoxy, high wear resistance coatings |
| CN1519282A (en) * | 2003-01-25 | 2004-08-11 | 赵东楼 | Speical coating material for sealing and antisepticising tube plate and nose of condenser |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1824717A (en) | 2006-08-30 |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20100414 Termination date: 20140225 |