CN101195918A - Catbon steel composite inhibitor for ultra-low-hardness water system - Google Patents
Catbon steel composite inhibitor for ultra-low-hardness water system Download PDFInfo
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- CN101195918A CN101195918A CNA2007101686884A CN200710168688A CN101195918A CN 101195918 A CN101195918 A CN 101195918A CN A2007101686884 A CNA2007101686884 A CN A2007101686884A CN 200710168688 A CN200710168688 A CN 200710168688A CN 101195918 A CN101195918 A CN 101195918A
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- carbon steel
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Abstract
The invention relates to a carbon steel compound corrosion inhibitor used for a water system of super-low hardness. Calculated according to the weight percentage, the invention is composed of 40 to 55 percent of hydroxyl phosphono-carboxylic acid, 1 to 3 percent of molyadate, 10 to 20 percent of polyphosphates, 1 to 3 percent of carboxylic acid sulfo acid copolymer, 10 to 23 percent of zinc salt, and 10 to 25 percent of water. The preparation of the carbon steel compound corrosion inhibitor of the invention is simple, the dosage is few, and the pollution is small. The invention is utilized for the carbon steel corrosion proof of the water system of super-low hardness, and the carbon steel corrosion speed is smaller than 0.125mm/a; the compound corrosion inhibitor contains no nitrate and chromate, which is advantageous for the environmental protection; and the compound corrosion inhibitor utilizes the synergy among the monomers, to reduce the dosage.
Description
Technical field
The present invention relates to a kind of carbon steel composite corrosion inhibitor that is used for the super-low-hardness aqueous systems.The invention belongs to chemistry and water treatment field.
Background technology
The water that hardness is low more is strong more to the corrodibility of carbon steel, so the carbon steel etching problem of super-low-hardness water system is a relatively more outstanding and scabrous problem in the industrial water system.In order to alleviate the carbon steel corrosion, generally take to add anti-corrosion measures such as inhibiter, galvanic protection, coating antifouling paste, the most frequently used to add inhibiter.Traditional inhibiter so both the medicine consumption was big, also can cause environmental pollution because of containing a large amount of nitrate, chromic salt.Developing a kind of dosage carbon steel inhibiter few, that substitute nitrate, chromic salt is very important.
Because the super-low-hardness glassware for drinking water has very strong corrodibility, also there is not a kind of inhibiter monomer can satisfy requirement for anticorrosion under this class condition of water quality at present.Result of study shows, has synergy between the inhibiter monomer, so, adopt multiple inhibiter monomer to mix, make a kind of composite corrosion inhibitor, can reduce the consumption of inhibiter.In addition, in recent ten years, some inhibiter monomers such as the good hydroxyl phosphine carboxylic acid of corrosion inhibition, eco-friendly molybdate occurred, this NEW TYPE OF COMPOSITE carbon steel inhibiter newly developed of attaching most importance to is laid a good foundation.
Summary of the invention
The purpose of this invention is to provide a kind of carbon steel composite corrosion inhibitor that is used for the super-low-hardness aqueous systems, this composite corrosion inhibitor preparation is simple, using dosage is few, pollution is little.
Technical scheme provided by the invention is: a kind of carbon steel composite corrosion inhibitor that is used for the super-low-hardness aqueous systems, by weight percentage, form by 40%～55% hydroxyl phosphine carboxylic acid, 1%～3% molybdate, 10%～20% poly-phosphate, 1%～3% carboxylic acid sulfonic acid copolymer, 10%～23% zinc salt, 10%～25% water.
Above-mentioned hydroxyl phosphine carboxylic acid is a 2-hydroxyl phosphino-acetate (HPAA).
Above-mentioned molybdate is Sodium orthomolybdate or Sodium Molybdate Dihydrate.
Above-mentioned poly-phosphate is tripoly phosphate sodium STPP or Sodium hexametaphosphate 99.
Above-mentioned carboxylic acid sulfonic acid copolymer is vinylformic acid-2-acrylamide-2-methyl propane sulfonic acid multipolymer (AA/AMPS), and limit viscosity number (30 ℃) is 0.055～0.100dl/g.
Above-mentioned zinc salt is Zincomed or Zinc Sulphate Heptahydrate.
Carbon steel composite corrosion inhibitor preparation method of the present invention is: each component and the water of inhibiter are mixed, and this mixed solution is product.
The invention has the beneficial effects as follows: carbon steel composite corrosion inhibitor preparation of the present invention is simple, dosage is few, pollution is little.Be used for the carbon steel protection against corrosion of super-low-hardness water system, the carbon steel corrosion speed is less than 0.125mm/a; Composite corrosion inhibitor does not contain nitrate, chromic salt, helps environment protection; Composite corrosion inhibitor has utilized the synergy between the monomer, has reduced using dosage.
The using dosage that is used for the carbon steel composite corrosion inhibitor of super-low-hardness aqueous systems is 40mg/L～80mg/L.
Embodiment
Embodiment 1
Being used for the carbon steel composite corrosion inhibitor of super-low-hardness aqueous systems, is 100% in compound weight, comprising: 55% 2-hydroxyl phosphino-acetate, 3% Sodium orthomolybdate, 20% tripoly phosphate sodium STPP, 2% carboxylic acid sulfonic acid copolymer, 10% Zincomed and 10% water.Its preparation method is: each component of inhibiter and water are mixed be product.When the dosage that uses composite corrosion inhibitor during as 60mg/L, the carbon steel corrosion speed equals 0.071mm/a.
Embodiment 2
Being used for the carbon steel composite corrosion inhibitor of super-low-hardness aqueous systems, is 100% in compound weight, comprising: 40% hydroxyl phosphino-acetate, 1% Sodium orthomolybdate, 10% Sodium hexametaphosphate 99,1% carboxylic acid sulfonic acid copolymer, 23% Zinc Sulphate Heptahydrate and 25% water.Its preparation method is: each component of inhibiter and water are mixed be product.When the dosage that uses composite corrosion inhibitor during as 60mg/L, the carbon steel corrosion speed equals 0.103mm/a.
Embodiment 3
Being used for the carbon steel composite corrosion inhibitor of super-low-hardness aqueous systems, is 100% in compound weight, comprising: 50% 2-hydroxyl phosphino-acetate, 1% Sodium orthomolybdate, 16% tripoly phosphate sodium STPP, 1% carboxylic acid sulfonic acid copolymer, 15% Zincomed, 17% water.Its preparation method is: each component of inhibiter and water are mixed be product.When the dosage that uses composite corrosion inhibitor during as 60mg/L, the carbon steel corrosion speed equals 0.021mm/a.
Embodiment 4
Being used for the carbon steel composite corrosion inhibitor of super-low-hardness aqueous systems, is 100% in compound weight, comprising: 50% 2-hydroxyl phosphino-acetate, 2% Sodium orthomolybdate, 12% Sodium hexametaphosphate 99,3% carboxylic acid sulfonic acid copolymer, 18% Zinc Sulphate Heptahydrate, 15% water.Its preparation method is: each component of inhibiter and water are mixed be product.When the dosage that uses composite corrosion inhibitor during as 60mg/L, the carbon steel corrosion speed equals 0.093mm/a.
Above-mentioned used carboxylic acid sulfonic acid copolymer is vinylformic acid-2-acrylamide-2-methyl propane sulfonic acid multipolymer (AA/AMPS), and limit viscosity number (30 ℃) is 0.055～0.100dl/g.
Claims (5)
1. carbon steel composite corrosion inhibitor that is used for the super-low-hardness aqueous systems, by weight percentage, form by 40%～55% hydroxyl phosphine carboxylic acid, 1%～3% molybdate, 10%～20% poly-phosphate, 1%～3% carboxylic acid sulfonic acid copolymer, 10%～23% zinc salt, 10%～25% water.
2. carbon steel composite corrosion inhibitor according to claim 1 is characterized in that: hydroxyl phosphine carboxylic acid is a 2-hydroxyl phosphino-acetate.
3. carbon steel composite corrosion inhibitor according to claim 1 and 2 is characterized in that: molybdate is a Sodium orthomolybdate.
4. carbon steel composite corrosion inhibitor according to claim 1 and 2 is characterized in that: poly-phosphate is tripoly phosphate sodium STPP or Sodium hexametaphosphate 99.
5. carbon steel composite corrosion inhibitor according to claim 1 and 2 is characterized in that: zinc salt is Zincomed or Zinc Sulphate Heptahydrate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200710168688A CN100575556C (en) | 2007-12-10 | 2007-12-10 | A kind of carbon steel composite corrosion inhibitor that is used for the super-low-hardness aqueous systems |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200710168688A CN100575556C (en) | 2007-12-10 | 2007-12-10 | A kind of carbon steel composite corrosion inhibitor that is used for the super-low-hardness aqueous systems |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101195918A true CN101195918A (en) | 2008-06-11 |
| CN100575556C CN100575556C (en) | 2009-12-30 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN200710168688A Expired - Fee Related CN100575556C (en) | 2007-12-10 | 2007-12-10 | A kind of carbon steel composite corrosion inhibitor that is used for the super-low-hardness aqueous systems |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103570143A (en) * | 2012-07-24 | 2014-02-12 | 中国石油化工股份有限公司 | Method of recycling reclaimed water for recirculating cooling water system |
| CN106191876A (en) * | 2016-08-30 | 2016-12-07 | 湖北省兴发磷化工研究院有限公司 | A kind of Cleaning and Passivation method of heat-exchange system equipment |
| CN104609579B (en) * | 2013-11-01 | 2018-08-14 | 湖州欧美新材料有限公司 | Multicomponent corrosion inhibiting and descaling agent |
| CN112457753A (en) * | 2020-10-16 | 2021-03-09 | 江苏中江装配式建筑科技股份有限公司 | Antirust agent for PC component steel template |
-
2007
- 2007-12-10 CN CN200710168688A patent/CN100575556C/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103570143A (en) * | 2012-07-24 | 2014-02-12 | 中国石油化工股份有限公司 | Method of recycling reclaimed water for recirculating cooling water system |
| CN103570143B (en) * | 2012-07-24 | 2015-11-25 | 中国石油化工股份有限公司 | A kind of Treated sewage reusing is in the method for recirculating cooling water system |
| CN104609579B (en) * | 2013-11-01 | 2018-08-14 | 湖州欧美新材料有限公司 | Multicomponent corrosion inhibiting and descaling agent |
| CN106191876A (en) * | 2016-08-30 | 2016-12-07 | 湖北省兴发磷化工研究院有限公司 | A kind of Cleaning and Passivation method of heat-exchange system equipment |
| CN112457753A (en) * | 2020-10-16 | 2021-03-09 | 江苏中江装配式建筑科技股份有限公司 | Antirust agent for PC component steel template |
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| Publication number | Publication date |
|---|---|
| CN100575556C (en) | 2009-12-30 |
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Granted publication date: 20091230 Termination date: 20101210 |