CN110158093A - One kind being used for softened water or demineralized water closed circulation cooling system corrosion inhibiter - Google Patents
One kind being used for softened water or demineralized water closed circulation cooling system corrosion inhibiter Download PDFInfo
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- CN110158093A CN110158093A CN201810256815.4A CN201810256815A CN110158093A CN 110158093 A CN110158093 A CN 110158093A CN 201810256815 A CN201810256815 A CN 201810256815A CN 110158093 A CN110158093 A CN 110158093A
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- water
- cooling system
- corrosion inhibiter
- closed circulation
- circulation cooling
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Classifications
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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
- C23F—NON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM SURFACE; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL; MULTI-STEP PROCESSES FOR SURFACE TREATMENT OF METALLIC MATERIAL INVOLVING AT LEAST ONE PROCESS PROVIDED FOR IN CLASS C23 AND AT LEAST ONE PROCESS COVERED BY SUBCLASS C21D OR C22F OR CLASS C25
- C23F11/00—Inhibiting corrosion of metallic material by applying inhibitors to the surface in danger of corrosion or adding them to the corrosive agent
- C23F11/08—Inhibiting corrosion of metallic material by applying inhibitors to the surface in danger of corrosion or adding them to the corrosive agent in other liquids
Abstract
The invention discloses one kind to be used for softened water closed circulation cooling system corrosion inhibiter, each component including following weight percent meter: the deionized water of molybdate 1-3%, copper inhibitor 3-9%, inhibition synergist 10-15%, pH adjusting agent 7.5-8.5%, complexing agent 2.5-3.5% and surplus.It is proposed by the present invention a kind of for softened water or demineralized water closed circulation cooling system corrosion inhibiter, molybdate and other components are used in compounding, have the characteristics that low toxicity, environmental protection, overcome the problem that molybdate dosage is big, at high cost, also there is good effect: being directed to water softening system, its corrosion rate can control 0.020mm/a, and for DW system demineralized water system, corrosion rate can control 0.019mm/a.
Description
Technical field
The present invention relates to scale remover technical fields, more particularly to a kind of cooling for softened water or demineralized water closed cycle
System inhibiter.
Background technique
As society and scientific and technological progress, urbanization and industrial continuous development, water resource are more and more nervous.It is industrial
The ratio that water accounts for mankind's water is very big, and wherein industrial circulating water occupies the 60-70% of industrial water again.In order to save water,
The concentration rate of industrial circulating water is continuously improved, and calcium ions and magnesium ions concentration is consequently increased in water, and scaling is also increasingly severe,
Lead to the reduction of heat exchange equipment heat exchange efficiency, recirculated water circulation area becomes smaller, and circulating resistance increases, and significantly increases so as to cause energy consumption
Add, increases production cost.In order to solve this problem, softened water or circulation cooling system of demineralized water are received significant attention and are answered
With.
Softened water or demineralized water have the advantages that concentration rate is high, less scaling compared with general industrial circulating water, but
With much better than corrosivity.Currently, solving the problems, such as that softened water or the corrosion of desalination closed water circulation system are to be added both at home and abroad
The nitrite of higher concentration or composite corrosion inhibitor containing nitrite.The corrosion mitigating effect of nitrite is undoubted, but it is deposited
In toxicity and caused problem of environmental pollution is discharged, is extremely limited its use scope, people turn to research direction
Less toxic or nontoxic compound, molybdate are exactly one of them.
When molybdate is used alone as corrosion inhibiter, dosage is big, and use cost is high, and using effect is not also very ideal.It is logical
It crosses introducing to act synergistically, the stable other corrosion inhibiter of properties of product reduce the usage amount of molybdate, improve grinding for corrosion inhibiting ability
Studying carefully becomes very active.
Summary of the invention
Technical problems based on background technology, the invention proposes one kind to be used for softened water or demineralized water closed cycle
Cooling system corrosion inhibiter, each component concertedness is good, and properties of product are stablized, and improves softened water or demineralized water closed cycle cooling system
The concentration rate of system controls etching problem existing for softened water or demineralized water closed circulation cooling system well.
One kind being used for softened water or demineralized water closed circulation cooling system corrosion inhibiter, including each of following weight percent meter
Component: molybdate 1-3%, copper inhibitor 3-9%, inhibition synergist 10-15%, pH adjusting agent 7.5-8.5%, complexing agent 2.5-
3.5% and surplus deionized water.
Preferably, the molybdate is sodium molybdate or ammonium molybdate.
Preferably, the copper inhibitor is benzotriazole or methylbenzotriazole.
Preferably, the inhibition synergist is 1,2,4- tricarboxylic acids -2- phosphonic acid butanes or organic phosphonate.
Preferably, the pH adjusting agent is piece alkali.
Preferably, the complexing agent is triethanolamine.
Preferably, the pH value of corrosion inhibiter is 10-14.
A kind of preparation method for softened water or demineralized water closed circulation cooling system corrosion inhibiter, method and step are as follows:
S1: reaction kettle is rinsed well, closes baiting valve, and 2/3 deionized water is added according to formulation ratio and pH is adjusted
Stirring is opened in agent, opens heating device, is kept for 45-55 DEG C of temperature；
S2: molybdate and copper inhibitor successively are added according to formulation ratio, inhibition synergist and complexing is added after to be dissolved
Agent；
S3: remaining 1/3 deionized water being supplied, 30-45min is stirred for, and until solution clear, opens cooling
Water is cooled to 28-32 DEG C；
S4: it opens baiting valve, filters to obtain the final product.
A kind of corrosion inhibiter proposed by the present invention is applied to softened water or demineralized water closed circulation cooling system.
Action principle
Softened water or demineralized water closed circulation cooling system concentration rate improve, and chloride ion largely accumulates, molybdate and iron
Ion forms molybdic acid molysite not soluble in water, is greatly improved the anti-chlorine ion performance of film；1,2,4- tricarboxylic acids -2- phosphonic acid base fourth
Alkane makes it have good scale inhibition and corrosion inhibition due to the architectural characteristic with phosphonic acids and carboxylic acid, and the oxidation susceptibility of chlorine-resistant is good；
Benzotriazole and copper atom form covalent bond and coordinate bond, alternate into chain polymer, form multilayer in metal surface
Protective film；Iron ion complexing agent and iron ion form stable complex compound, form the protective film of insoluble reticular structure, in order to anti-
Only solution crystallization is precipitated, and pH adjusting agent, which is added, can make product keep stablizing.
Compared with prior art, the device have the advantages that being:
It is proposed by the present invention a kind of for softened water or demineralized water closed circulation cooling system corrosion inhibiter, by molybdate and its
He is used in compounding component, has the characteristics that low toxicity, environmental protection, overcomes the problem that molybdate dosage is big, at high cost, also have
Good effect: being directed to water softening system, and corrosion rate can control 0.020mm/a, for DW system demineralized water system, corrosion
Rate can control 0.019mm/a.
Specific embodiment
Combined with specific embodiments below the present invention is made further to explain.
Embodiment 1
One kind being used for softened water or demineralized water closed circulation cooling system corrosion inhibiter, including in parts by weight such as the following group
Part: molybdate 1%, copper inhibitor 3%, inhibition synergist 10%, pH adjusting agent 7.5%, complexing agent 2.5% and surplus go from
Sub- water, the pH value of corrosion inhibiter are 10.3.
Molybdate is sodium molybdate；Copper inhibitor is benzotriazole；Inhibition synergist is 1,2,4- tricarboxylic acids -2- phosphonic acid base
Butane；PH adjusting agent is piece alkali；The complexing agent is triethanolamine.
A kind of preparation method for softened water or demineralized water closed circulation cooling system corrosion inhibiter, method and step are as follows:
S1: reaction kettle is rinsed well, closes baiting valve, and 2/3 deionized water is added according to formulation ratio and pH is adjusted
Stirring is opened in agent, opens heating device, keeps temperature 45 C；
S2: molybdate and copper inhibitor successively are added according to formulation ratio, inhibition synergist and complexing is added after to be dissolved
Agent；
S3: remaining 1/3 deionized water being supplied, 45min is stirred for, and until solution clear, opens cooling water,
It is cooled to 28 DEG C；
S4: it opens baiting valve, filters to obtain the final product.
Embodiment 2
One kind being used for softened water or demineralized water closed circulation cooling system corrosion inhibiter, including in parts by weight such as the following group
Part: molybdate 3%, copper inhibitor 9%, inhibition synergist 15%, pH adjusting agent 8.5%, complexing agent 3.5% and surplus go from
Sub- water, the pH value of corrosion inhibiter are 13.7.
Molybdate is ammonium molybdate；Copper inhibitor is methylbenzotriazole；Inhibition synergist is organic phosphonate；PH is adjusted
Agent is piece alkali；The complexing agent is triethanolamine.
A kind of preparation method for softened water or demineralized water closed circulation cooling system corrosion inhibiter, method and step are as follows:
S1: reaction kettle is rinsed well, closes baiting valve, and 2/3 deionized water is added according to formulation ratio and pH is adjusted
Stirring is opened in agent, opens heating device, is kept for 55 DEG C of temperature；
S2: molybdate and copper inhibitor successively are added according to formulation ratio, inhibition synergist and complexing is added after to be dissolved
Agent；
S3: remaining 1/3 deionized water being supplied, 30min is stirred for, and until solution clear, opens cooling water,
It is cooled to 32 DEG C；
S4: it opens baiting valve, filters to obtain the final product.
Embodiment 3
One kind being used for softened water or demineralized water closed circulation cooling system corrosion inhibiter, including in parts by weight such as the following group
Part: molybdate 2%, copper inhibitor 6%, inhibition synergist 13%, pH adjusting agent 8%, complexing agent 3% and surplus deionization
Water, the pH value of corrosion inhibiter are 12.9.
Molybdate is sodium molybdate；Copper inhibitor is benzotriazole；Inhibition synergist is 1,2,4- tricarboxylic acids -2- phosphonic acid base
Butane；PH adjusting agent is piece alkali；The complexing agent is triethanolamine.
A kind of preparation method for softened water or demineralized water closed circulation cooling system corrosion inhibiter, method and step are as follows:
S1: reaction kettle is rinsed well, closes baiting valve, and 2/3 deionized water is added according to formulation ratio and pH is adjusted
Stirring is opened in agent, opens heating device, keeps temperature 50 C；
S2: molybdate and copper inhibitor successively are added according to formulation ratio, inhibition synergist and complexing is added after to be dissolved
Agent；
S3: remaining 1/3 deionized water being supplied, 40min is stirred for, and until solution clear, opens cooling water,
It is cooled to 30 DEG C；
S4: it opens baiting valve, filters to obtain the final product.
Embodiment 4
One kind being used for softened water or demineralized water closed circulation cooling system corrosion inhibiter, including in parts by weight such as the following group
Part: molybdate 1.5%, copper inhibitor 7%, inhibition synergist 11%, pH adjusting agent 7.8%, complexing agent 3.2% and surplus are gone
Ionized water, the pH value of corrosion inhibiter are 11.7.
Molybdate is ammonium molybdate；Copper inhibitor is methylbenzotriazole；Inhibition synergist is organic phosphonate；PH is adjusted
Agent is piece alkali；The complexing agent is triethanolamine.
A kind of preparation method for softened water or demineralized water closed circulation cooling system corrosion inhibiter, method and step are as follows:
S1: reaction kettle is rinsed well, closes baiting valve, and 2/3 deionized water is added according to formulation ratio and pH is adjusted
Stirring is opened in agent, opens heating device, is kept for 47 DEG C of temperature；
S2: molybdate and copper inhibitor successively are added according to formulation ratio, inhibition synergist and complexing is added after to be dissolved
Agent；
S3: remaining 1/3 deionized water being supplied, 35min is stirred for, and until solution clear, opens cooling water,
It is cooled to 30 DEG C；
S4: it opens baiting valve, filters to obtain the final product.
Embodiment 5
One kind being used for softened water or demineralized water closed circulation cooling system corrosion inhibiter, including in parts by weight such as the following group
Part: molybdate 2.5%, copper inhibitor 8%, inhibition synergist 14%, pH adjusting agent 8.2%, complexing agent 2.8% and surplus are gone
Ionized water, the pH value of corrosion inhibiter are 13.6.
Molybdate is sodium molybdate；Copper inhibitor is benzotriazole；Inhibition synergist is 1,2,4- tricarboxylic acids -2- phosphonic acid base
Butane；PH adjusting agent is piece alkali；The complexing agent is triethanolamine.
A kind of preparation method for softened water or demineralized water closed circulation cooling system corrosion inhibiter, method and step are as follows:
S1: reaction kettle is rinsed well, closes baiting valve, and 2/3 deionized water is added according to formulation ratio and pH is adjusted
Stirring is opened in agent, opens heating device, is kept for 53 DEG C of temperature；
S2: molybdate and copper inhibitor successively are added according to formulation ratio, inhibition synergist and complexing is added after to be dissolved
Agent；
S3: remaining 1/3 deionized water being supplied, 40min is stirred for, and until solution clear, opens cooling water,
It is cooled to 30 DEG C；
S4: it opens baiting valve, filters to obtain the final product.
Inhibition experiment:
Softened water: Ca2+Concentration (with calcium carbonate) 10mg/L, HCO3-Concentration (with calcium carbonate) 105mg/L, test temperature
Degree: 50 DEG C, test period: 72 hours.
Demineralized water: Ca2+Concentration (with calcium carbonate) 0mg/L, conductivity: 5us/cm (25 DEG C), test temperature: 50 DEG C, examination
It tests the time: 72 hours.
Experimental result is shown in Table 1.
Test result table 1
Control group is commercially available corrosion inhibiter.
Corrosion inhibiter of the invention is to softened water or demineralized water closed circulation cooling system it can be seen from the above test data
Deep-etching water quality has good corrosion inhibiting ability, and significant effect is better than control group；It is added in embodiment 4 in water softening system
When 40mg/L, corrosion rate can control 0.020mm/a, in embodiment 4 when DW system demineralized water system adds 50mg/L, corrosion speed
Rate can control 0.019mm/a.
As can be seen from Table 1, adding consistency in embodiment 1 is apparently higher than embodiment 2-5, this is because embodiment 1
Middle inhibition effective content is lower, therefore only increases drug concentration and can be only achieved corrosion mitigating effect.
Corrosion inhibiter each component concertedness of the invention is good, and properties of product are stablized, low toxicity, environmental protection.Overcome molybdate dosage
Greatly, problem at high cost, improves the concentration rate of softened water or demineralized water closed circulation cooling system, controls well soft
Change etching problem existing for water or demineralized water closed circulation cooling system.
The foregoing is only a preferred embodiment of the present invention, but scope of protection of the present invention is not limited thereto,
Anyone skilled in the art in the technical scope disclosed by the present invention, according to the technique and scheme of the present invention and its
Inventive concept is subject to equivalent substitution or change, should be covered by the protection scope of the present invention.
Claims (9)
1. one kind is used for softened water or demineralized water closed circulation cooling system corrosion inhibiter, which is characterized in that including following weight hundred
Point than meter each component: molybdate 1-3%, copper inhibitor 3-9%, inhibition synergist 10-15%, pH adjusting agent 7.5-8.5%,
The deionized water of complexing agent 2.5-3.5% and surplus.
2. according to claim 1 a kind of for softened water or demineralized water closed circulation cooling system corrosion inhibiter, feature
It is, the molybdate is sodium molybdate or ammonium molybdate.
3. according to claim 1 a kind of for softened water or demineralized water closed circulation cooling system corrosion inhibiter, feature
It is, the copper inhibitor is benzotriazole or methylbenzotriazole.
4. according to claim 1 a kind of for softened water or demineralized water closed circulation cooling system corrosion inhibiter, feature
It is, the inhibition synergist is 1,2,4- tricarboxylic acids -2- phosphonic acid butanes or organic phosphonate.
5. according to claim 1 a kind of for softened water or demineralized water closed circulation cooling system corrosion inhibiter, feature
It is, the pH adjusting agent is piece alkali.
6. according to claim 1 a kind of for softened water or demineralized water closed circulation cooling system corrosion inhibiter, feature
It is, the complexing agent is triethanolamine.
7. one kind described in -6 is used for softened water or demineralized water closed circulation cooling system corrosion inhibiter according to claim 1, special
Sign is that the pH value of corrosion inhibiter is 10-14.
8. a kind of preparation side for softened water or demineralized water closed circulation cooling system corrosion inhibiter according to claim 1
Method, which is characterized in that method and step is as follows:
S1: reaction kettle is rinsed well, closes baiting valve, and 2/3 deionized water and pH adjusting agent are added according to formulation ratio, beats
Stirring is opened, heating device is opened, is kept for 45-55 DEG C of temperature；
S2: molybdate and copper inhibitor successively are added according to formulation ratio, inhibition synergist and complexing agent is added after to be dissolved；
S3: remaining 1/3 deionized water being supplied, 30-45min is stirred for, and until solution clear, opens cooling water,
It is cooled to 28-32 DEG C；
S4: it opens baiting valve, filters to obtain the final product.
9. a kind of corrosion inhibiter described in any one of claims 1-6 is applied to softened water or demineralized water closed circulation cooling system.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810256815.4A CN110158093A (en) | 2018-03-27 | 2018-03-27 | One kind being used for softened water or demineralized water closed circulation cooling system corrosion inhibiter |
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| CN201810256815.4A CN110158093A (en) | 2018-03-27 | 2018-03-27 | One kind being used for softened water or demineralized water closed circulation cooling system corrosion inhibiter |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113061894A (en) * | 2021-03-02 | 2021-07-02 | 福建宁德核电有限公司 | Corrosion inhibitor and preparation method thereof, and corrosion inhibition method of closed cooling water system |
| CN113912197A (en) * | 2021-11-11 | 2022-01-11 | 新疆水处理工程技术研究中心有限公司 | Softened water closed system corrosion inhibitor and preparation method thereof |
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| CN113061894A (en) * | 2021-03-02 | 2021-07-02 | 福建宁德核电有限公司 | Corrosion inhibitor and preparation method thereof, and corrosion inhibition method of closed cooling water system |
| CN113912197A (en) * | 2021-11-11 | 2022-01-11 | 新疆水处理工程技术研究中心有限公司 | Softened water closed system corrosion inhibitor and preparation method thereof |
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