CN104498928A - Composite film-forming liquid for brass pipe of thermal power plant coagulator and preparation method thereof - Google Patents
Composite film-forming liquid for brass pipe of thermal power plant coagulator and preparation method thereof Download PDFInfo
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- CN104498928A CN104498928A CN201510012494.XA CN201510012494A CN104498928A CN 104498928 A CN104498928 A CN 104498928A CN 201510012494 A CN201510012494 A CN 201510012494A CN 104498928 A CN104498928 A CN 104498928A
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- forming liquid
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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
- C23C22/00—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
- C23C22/05—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions
- C23C22/60—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions using alkaline aqueous solutions with pH greater than 8
- C23C22/63—Treatment of copper or alloys based thereon
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- Chemical Kinetics & Catalysis (AREA)
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- Mechanical Engineering (AREA)
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- Organic Chemistry (AREA)
- Preventing Corrosion Or Incrustation Of Metals (AREA)
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Abstract
The invention relates to a composite film-forming liquid for a brass pipe of a thermal power plant coagulator and a preparation method thereof. The preparation method comprises the following steps: stirring 12-18 parts by mass of NaOH, 20-30 parts by mass of Na2CO3, 70-90 parts by mass of CH3CH2OH, 3-5 parts by mass of CuSO4, 2-4 parts by mass of Zn(NO3)2, 2-3 parts by mass of MBT, 1-2 parts by mass of copper reagent and 0.8-1.2 parts by mass of ninol in a reaction tank for 30 minutes, and performing compound mixing and interreaction to form a film-forming liquid; and then, pouring the film-forming liquid and desalted water into an acid box according to a mass ratio of (1:10)-(1:12) on a cleaning site, and diluting to obtain the finished product liquid. According to the invention, a brass pipe composite film formed by the composite film-forming liquid is high in corrosion resistance; the dissolution time with respect to 1 mmol/L hydrochloric acid and 20% ammonia water exceeds one minute, and the composite film is less prone to rupture; and tests indicate that the film has the same ductility as the matrix and is high in scouring resistance, and the hardness value of the surface of the pipe after film coating is slightly increased in comparison with the original matrix.
Description
Technical field
The invention belongs to station boiler chemical cleaning technique field, especially a kind of fuel-burning power plant distiller brazed copper tube composite membrane-forming liquid and compound method.
Background technology
No matter be new-built unit or operating unit, distiller tubing matting and film forming, make heat-exchanger surface decontamination keep clean, improve heat exchanger effectiveness, prevent fouling or pollutent attachment, prevent distiller tubing underdeposit corrosion, improve condenser vacuum degree, prevent recirculated cooling water from leaking into very effective means and the measure of water-steam system.DL/T 957 " fuel-burning power plant distiller matting and film forming directive/guide " specifies: the distiller brazed copper tube of new-built unit should go into operation before cleaning film forming, its program is oil removing and film forming process; Matting should be carried out when the operating unit distiller thick 0.5mm of being not less than of dirt or dirt cause end difference to be greater than 8 degrees Celsius; Should carry out direct formation of film at surface after brazed copper tube cleaning, film-forming process should be selected according to the practical situation of power plant.
Conventional distiller brazed copper tube film forming medicament has MBT (mercaptobenzothiazole), BTA (benzotriazole), TTA (methyl benzotriazazole), FeSO
4(one-pass film-forming or film forming in running), K
2s
2o
8(Quick Oxidation film forming), α-benzoinoxime (Thiocarb) etc.; although there is multiple film forming medicament can for selecting; but; owing to using single film forming medicament; no matter be form which kind of single rete as oxide film, coherent film or individual layer chelating membrane; roughly there is following shortcoming or restriction condition: the part protective membrane 1, formed as cupric oxide film quality loosen, colourless chelating rete is thin and soft, protection effect is not good.2, the coating effects had is better, but the complicated operations such as on-the-spot dosing, molten medicine, high to temperature, flow rates demand, has repeatedly expose to the sun empty and hot water water rinsing requirement etc. in film-forming process.3, the limitation of part film-forming process most critical is that film forming engineering time is oversize, time and effort consuming, is subject to on-the-spot duration restriction.
Summary of the invention
The object of the invention is to overcome the deficiencies in the prior art, a kind of fuel-burning power plant distiller brazed copper tube composite membrane-forming liquid and compound method are provided.
The present invention solves its technical problem and takes following technical scheme to realize:
A kind of fuel-burning power plant distiller brazed copper tube composite membrane-forming liquid, in the solution of total mass 1000 parts, comprises the following component formed by ratio of quality and the number of copies:
And the optimum proportioning of above-mentioned composite membrane-forming liquid is: in the solution of total mass 1000 parts, comprise the following component formed by ratio of quality and the number of copies:
A compound method for above-mentioned fuel-burning power plant distiller brazed copper tube composite membrane-forming liquid, step is:
(1) the film forming liquid preparation of distiller brazed copper tube composite membrane-forming liquid; First, by NaOH:12-18 part; Na
2cO
3: 20-30 part; CH
3cH
2oH:70-90 part; CuSO
4: 3-5 part; Zn (NO
3)
2: 2-4 part; MBT:2-3 part; α-benzoinoxime: 1-2 part; Ninol: the mass fraction of 0.8-1.2 part is middle in retort to be stirred 30 minutes, and by composite mixing, reacting to each other forms film forming liquid;
(2) at cleaning extemporaneous preparation finished fluid; Above-mentioned film forming liquid is transported to cleaning on-the-spot, then pour in sour case by the mass ratio of film forming liquid ﹕ de-mineralized water 1 ﹕ 10 to 1 ﹕ 12 and dilute, obtain finished fluid, then use.
Advantage of the present invention and positively effect are:
1, film forming complex liquid of the present invention is by showing after the repeatedly industrialness application on Large-scale machine set, uses the present invention to carry out condenser copper tubes plated film, has the advantage that scene is easy to control, easy and simple to handle, the engineering construction duration is short.
2, the copper pipe protective membrane that the present invention is formed is multilayer complex films, and distiller copper material corrosion resistance nature is improved significantly, and can obviously extend its life-span under severe condition of water quality.
3, to have hydrophobic nature strong simultaneously for the compound film quality of the present invention, water droplet on its surface in hemispherical and do not spread out, corrosion resistance is strong, dripped all more than 1 minute, not easily break the molten time to 1mmol/L hydrochloric acid and 20% ammoniacal liquor, test shows the ductility of film and matrix phase is same, resistance to erosion ability is strong, and after plated film completes, the hardness value of tube surfaces slightly rises than protocorm.
4, composite membrane of the present invention drip the molten time in DL/T 957 " fuel-burning power plant distiller matting and the film forming directive/guide " good criteria of 30 seconds.The circulating water system hanging film scene reaching 3 months shows, compared with other film forming medicament pipe samples, after this film forming, pipe sample surface corrosion product is minimum, fouling condition is the lightest.
5, the present invention compares with FeSO4 thin film-forming method, and field conduct technique is easy to control, and does not need back and forth sudden and violent empty, little by such environmental effects, do not need to regulate pH value at any time, work on the spot amount is little, monitoring project is few, and monitoring gap periods is long, ensures that film-formation result stability is high; And about the duration only has the half of FeSO4 film forming.
6, the present invention compares with α-benzoinoxime or class α-benzoinoxime material thin film-forming method, and the external conditions of needs is low, if do not needed the hot water under high-temperature condition to dry.
Embodiment
Be further described the invention process below, following examples are descriptive, are not determinate, can not limit protection scope of the present invention with this.
A kind of fuel-burning power plant distiller brazed copper tube composite membrane-forming liquid, in the solution of total mass 1000 parts, comprises the following component formed by ratio of quality and the number of copies:
The compound method of above-mentioned fuel-burning power plant distiller brazed copper tube composite membrane-forming liquid, step is:
(1) the film forming liquid preparation of distiller brazed copper tube composite membrane-forming liquid; First, by NaOH:12-18 part; Na
2cO
3: 20-30 part; CH
3cH
2oH:70-90 part; CuSO
4: 3-5 part; Zn (NO
3)
2: 2-4 part; MBT:2-3 part; α-benzoinoxime: 1-2 part; Ninol: the mass fraction of 0.8-1.2 part is middle in retort to be stirred 30 minutes, and by composite mixing, reacting to each other forms film forming liquid;
(2) at cleaning extemporaneous preparation finished fluid; Above-mentioned film forming liquid is transported to cleaning on-the-spot, then pour in sour case by the mass ratio of film forming liquid ﹕ de-mineralized water 1 ﹕ 10 to 1 ﹕ 12 and dilute, obtain finished fluid, then use.
Example 1
A kind of fuel-burning power plant distiller brazed copper tube composite membrane-forming liquid, in the solution of total mass 1000 parts, comprises the following component formed by ratio of quality and the number of copies:
The composite membrane-forming liquid prepared by above-mentioned mass component, corrosion resistance is strong, dripped all more than 1 minute, not easily break the molten time to 1mmol/L hydrochloric acid and 20% ammoniacal liquor, test shows the ductility of film and matrix phase is same, resistance to erosion ability is strong, and after plated film completes, the hardness value of tube surfaces slightly rises than protocorm.
Example 2
A kind of fuel-burning power plant distiller brazed copper tube composite membrane-forming liquid, in the solution of total mass 1000 parts, comprises the following component formed by ratio of quality and the number of copies:
The composite membrane-forming liquid prepared by above-mentioned mass component, corrosion resistance is strong, dripped all more than 1.5 minutes, not easily break the molten time to 1mmol/L hydrochloric acid and 20% ammoniacal liquor, test shows the ductility of film and matrix phase is same, resistance to erosion ability is strong, after plated film completes, the hardness value of tube surfaces slightly rises than protocorm, the composite membrane-forming liquid best results that this proportioning obtains.
Example 3
A kind of fuel-burning power plant distiller brazed copper tube composite membrane-forming liquid, in the solution of total mass 1000 parts, comprises the following component formed by ratio of quality and the number of copies:
The composite membrane-forming liquid prepared by above-mentioned mass component, corrosion resistance is strong, dripped all more than 1 minute, not easily break the molten time to 1mmol/L hydrochloric acid and 20% ammoniacal liquor, test shows the ductility of film and matrix phase is same, resistance to erosion ability is strong, and after plated film completes, the hardness value of tube surfaces slightly rises than protocorm.
Claims (3)
1. a fuel-burning power plant distiller brazed copper tube composite membrane-forming liquid, is characterized in that: in the solution of total mass 1000 parts, comprises the following component formed by ratio of quality and the number of copies:
2. fuel-burning power plant according to claim 1 distiller brazed copper tube composite membrane-forming liquid, is characterized in that: in the solution of total mass 1000 parts, comprises the following component formed by ratio of quality and the number of copies:
3. a compound method for above-mentioned fuel-burning power plant distiller brazed copper tube composite membrane-forming liquid, is characterized in that step is:
(1) the film forming liquid preparation of distiller brazed copper tube composite membrane-forming liquid; First, by NaOH:12-18 part; Na
2cO
3: 20-30 part; CH
3cH
2oH:70-90 part; CuSO
4: 3-5 part; Zn (NO
3)
2: 2-4 part; MBT:2-3 part; α-benzoinoxime: 1-2 part; Ninol: the mass fraction of 0.8-1.2 part is middle in retort to be stirred 30 minutes, and by composite mixing, reacting to each other forms film forming liquid;
(2) at cleaning extemporaneous preparation finished fluid; Above-mentioned film forming liquid is transported to cleaning on-the-spot, then pour in sour case by the mass ratio of film forming liquid ﹕ de-mineralized water 1 ﹕ 10 to 1 ﹕ 12 and dilute, obtain finished fluid, then use.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510012494.XA CN104498928B (en) | 2015-01-12 | 2015-01-12 | A kind of thermal power plant condenser brass tube is combined into film liquid and compound method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510012494.XA CN104498928B (en) | 2015-01-12 | 2015-01-12 | A kind of thermal power plant condenser brass tube is combined into film liquid and compound method |
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| Publication Number | Publication Date |
|---|---|
| CN104498928A true CN104498928A (en) | 2015-04-08 |
| CN104498928B CN104498928B (en) | 2017-07-04 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510012494.XA Active CN104498928B (en) | 2015-01-12 | 2015-01-12 | A kind of thermal power plant condenser brass tube is combined into film liquid and compound method |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6139610A (en) * | 1996-01-05 | 2000-10-31 | Wayne Pigment Corp. | Hybrid pigment grade corrosion inhibitor compositions and procedures |
| CN102534603A (en) * | 2012-02-27 | 2012-07-04 | 济宁新格瑞水处理有限公司 | Composite prefilming technique of steam condenser copper tube |
-
2015
- 2015-01-12 CN CN201510012494.XA patent/CN104498928B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6139610A (en) * | 1996-01-05 | 2000-10-31 | Wayne Pigment Corp. | Hybrid pigment grade corrosion inhibitor compositions and procedures |
| CN102534603A (en) * | 2012-02-27 | 2012-07-04 | 济宁新格瑞水处理有限公司 | Composite prefilming technique of steam condenser copper tube |
Non-Patent Citations (3)
| Title |
|---|
| 严煦世等: "《给水工程（第四版）》", 31 December 1999 * |
| 李兴等: "凝结器铜管不同成膜剂膜质的比较分析", 《华北电力技术》 * |
| 李兴等: "火力发电厂凝结器铜管镀膜新工艺的应用", 《清洗世界》 * |
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| CN104498928B (en) | 2017-07-04 |
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