CN102451598A - Composite corrosion inhibitor for carbon dioxide removing system and application thereof - Google Patents
Composite corrosion inhibitor for carbon dioxide removing system and application thereof Download PDFInfo
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- CN102451598A CN102451598A CN2010105208258A CN201010520825A CN102451598A CN 102451598 A CN102451598 A CN 102451598A CN 2010105208258 A CN2010105208258 A CN 2010105208258A CN 201010520825 A CN201010520825 A CN 201010520825A CN 102451598 A CN102451598 A CN 102451598A
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Abstract
The invention relates to a composite corrosion inhibitor for a carbon dioxide removing system. The composite corrosion inhibitor consists of a component A, a component B and a component C, wherein the component A is selected from one of water-soluble orthovanadate, water-soluble metavanadate and a mixture of water-soluble orthovanadate or water-soluble metavanadate and water-soluble molybdate; the component B is at least one salt selected from water-soluble inorganic zinc salt and water-soluble inorganic phosphate; and the component C is an organic phosphonic acid. The corrosion inhibitor disclosed by the invention is suitable for corrosion inhibition treatment in the carbon dioxide removing system, erosion of chorine ions in the carbon dioxide removing system on equipment in use can be slowed down effectively, and a corrosion inhibition rate can be over 77 percent.
Description
Technical field
The present invention relates to the corrosion inhibiter and the application thereof of a kind of carbon dioxide eliminating system, relate to a kind of composite corrosion inhibitor and the application in ethylene oxide production plant carbon dioxide eliminating system thereof particularly.
Background technology
Carbon dioxide eliminating is often run in industry, as in process for ethylene oxide production, exists with carbon dioxide, is separating carbon dioxide, carries out with carbon dioxide absorption desorption system (being the carbon dioxide eliminating system) usually in the industry.Carbon dioxide absorption uses wet chemical to be basic absorption liquid usually, adds a certain amount of borate and other inorganic salts simultaneously to promote absorption, and carbon dioxide is removed from system, and absorption liquid then recycles through desorption process repeatedly.But owing in being absorbed unstripped gas, be mixed with a spot of oxygen and dichloroethanes, dichloroethanes high-temperature lower part in alkaline solution divides hydrolysis to produce chlorion, recycles in the process at absorption liquid, and chlorion produces accumulation, and its concentration constantly raises.Because the equipment of carbon dioxide eliminating system (being decarbonization system) mainly uses the stainless steel of the trades mark such as 304,316, the existence of chlorion has significant facilitation to the corrosion of this type material.Under the trace oxygen effect that in carbon dioxide and gas, exists, the corrosion of a large amount of further acceleration equipments of chlorion, to system safe, stable, efficiently the operation make a big impact.
BP GB1415036A and Chinese patent CN1367170A disclose and in the potash absorption liquid, have added potassium borate, potassium vanadate (during enforcement with vanadic anhydride and potassium hydroxide reaction) and be activator; To improve assimilation effect, activator level is the 2-8% (potassium vanadate is 1.5-5%) of absorption liquid.Wherein, Potassium vanadate is to be transformed with valency height, hypertoxic vanadic anhydride, has certain oxidisability, in certain concentration range, has stainless passivation corrosion inhibition; But the purpose of foregoing invention is to improve assimilation effect; And do not have to investigate to corrosion on Equipment situation and the influence of potassium vanadate to corroding, and potassium vanadate is improper as if service condition as the passivation corrosion inhibiter, then can cause corrosion to increase the weight of.Chinese patent CN101066516A discloses a kind of absorption liquid of being made up of potash and boric acid hydrogen dipotassium, but the equipment corrosion problem of absorption system is not noted yet, does not more propose the measure that solves.
Summary of the invention
The object of the present invention is to provide a kind of composite corrosion inhibitor, it has good corrosion resistance.
Another object of the present invention is to composite corrosion inhibitor of the present invention is applied in the carbon dioxide eliminating system, to slow down corrosion on Equipment in the carbon dioxide eliminating system.
For achieving the above object; The invention provides the composite corrosion inhibitor of a kind of carbon dioxide eliminating system; It is made up of component A, B component, component C; Wherein, component A is selected from a kind of salt of water-soluble orthovanadate, water-soluble metavanadate, perhaps is a kind of in the mixture of water-soluble orthovanadate or water-soluble metavanadate and water-soluble molybdate; B component is at least a salt that is selected from water-soluble inorganic zinc salt and the water-soluble inorganic phosphate, and component C is a kind of organic phospho acid.
Component A of the present invention both can with B component and C synergistic slow corrosion, again can be as activator, promote that solution of potassium carbonate plays a multiplier effect to the absorption of carbon dioxide in the carbon dioxide eliminating system.
Component A of the present invention is preferably a kind of in the mixture of water-soluble orthovanadate or water-soluble metavanadate and water-soluble molybdate.Wherein said orthovanadate is selected from sodium orthovanadate and ortho-vanadic acid potassium; Metavanadate is selected from sodium metavanadate and potassium metavanadate; Molybdate is selected from sodium molybdate and potassium molybdate.
Inorganic zinc salt of the present invention is preferably from zinc sulfate; Inorganic phosphate is preferably from calgon, sodium phosphate trimer and sodium phosphate.
Organic phospho acid of the present invention is preferably from 2-phosphate-1,2,4-butane tricarboxylate (PBTCA), 1 hydroxyethylidine diphosphonate (HEDPA), 2-hydroxyethylidene diphosphonic acid guanidine-acetic acid (HPAA) and have a following general formula contain the phosphonate group poly-aspartate:
R wherein
1, R
2, R
3And R
4Be H or CH independently
2-PO
3H
2, the molecular weight of poly-aspartate is 2000-20000, with PO
4The content of weight meter organic phosphine is at least 2%.Wherein, in the poly-aspartate H on the nitrogen by CH
2-PO
3H
2Substituted many more, the content of organic phosphine is high more, and its scale-inhibiting properties is good more, but the content of organic phosphine can unrestrictedly not increase, its peak be in the poly-aspartate H on the nitrogen all by CH
2-PO
3H
2Replace, organic phosphine content according to the invention is with PO
4Meter is preferably 2 weight %-11 weight %, 5 weight %-11 weight % more preferably.
The phosphonate group poly-aspartate that contains of the present invention is introduced Chinese patent CN1569922A prospectus as a part of the present invention at this by the preparation of Chinese patent CN1569922A disclosed method in full.
Total consumption of component component A of the present invention is the 1.0-4.0% of pending aqueous solution quality.
Total consumption of B component of the present invention is the 0.04-0.4% of pending aqueous solution quality.
The consumption of component C component of the present invention is the 0.02-0.2% of pending aqueous solution quality.
Available conventional method prepares corrosion inhibiter of the present invention, and the reinforced order of each component is unimportant, for example can component A, B component and component C and water be pressed predetermined mixed, can make required corrosion inhibiter.Also can corrosion inhibiter of the present invention (perhaps water-soluble back) be joined in the carbon dioxide eliminating system simultaneously.
Corrosion inhibiter of the present invention is applicable to the inhibition processing of carbon dioxide eliminating system; The inhibition that is specially adapted to ethylene oxide device carbon dioxide eliminating system is handled; Can slow down effectively that chlorion is to the corrosion of device therefor in the carbon dioxide eliminating system, corrosion inhibition rate can reach more than 77%.
The inventor also finds: when component A was made up of orthovanadate or metavanadate and molybdate, very obvious with the synergy of B component and C, corrosion inhibition rate can improve greatly, and corrosion inhibition rate can be brought up to more than 80%.
For not contain the wet chemical of vanadate, as is wet chemical or during for potash and boratory mixed solution for carbon dioxide absorption liquid, gets final product to the adding component A of carbon dioxide eliminating system and B component, C by consumption of the present invention; For carbon dioxide absorption liquid is when containing the wet chemical of vanadate, can add the molybdate among B component of the present invention, component C and the component A; Perhaps only add B component of the present invention, C, vanadate both can be used as the promoter of carbon dioxide absorption in the absorption liquid like this, can be used as the collaborative component A of corrosion inhibiter of the present invention again.
The specific embodiment
With specific embodiment technical scheme of the present invention is described, but protection scope of the present invention is not limited thereto.
In the following example; 304 stainless steady-state polarization (sweep speed 5mV/S by electrochemical workstation (CHI660D/ Shanghai occasion China instrument company) mensuration; Sweep limits-0.3～0.8V); Intersection point by the Ta Feier district on negative electrode and the anodic polarization curves characterizes the corrosion condition of 304 stainless steels in absorption liquid, and intersecting point coordinate is a corrosion potential and from corrosion current.The present invention is basic absorption liquid with the aqueous solution that only contains potash and potassium borate, and the corrosion of other system and its compare, and corrosion potential is just becoming, diminishing to be from corrosion current has corrosion inhibition.Corrosion mitigating effect is represented through corrosion inhibition rate, presses following formula and calculates:
In corrosion inhibition rate=(in the basic absorption liquid in corrosion current-inhibition system from corrosion current)/basic absorption liquid from corrosion current * 100%
Embodiment 1
The aqueous solution is formed (mass percent): potash 20%, and potassium borate 6%, sodium orthovanadate 1%, sodium molybdate 0.5%, zinc sulfate 0.08%, PBTCA 0.05%.In the time of 90 ℃, the feeding carbon dioxide makes and becomes carbon dioxide saturated absorption liquid.Absorption liquid to 304 Corrosion of Stainless Steel characteristics is: corrosion potential 0.02V, and from corrosion current 0.55 μ A.cm
-2
Embodiment 2
The aqueous solution is formed (mass percent): potash 20%, and potassium borate 6%, sodium orthovanadate 1%, sodium molybdate 0.5%, zinc sulfate 0.08%, HEDPA 0.05%.In the time of 90 ℃, the feeding carbon dioxide makes and becomes carbon dioxide saturated absorption liquid.This absorption liquid to 304 Corrosion of Stainless Steel characteristics is: corrosion potential 0.01V, and from corrosion current 0.64 μ A.cm
-2
Embodiment 3
The aqueous solution is formed (mass percent): potash 20%, and potassium borate 6%, sodium orthovanadate 1%, sodium molybdate 0.5%, zinc sulfate 0.08%, HPAA 0.05%.In the time of 90 ℃, the feeding carbon dioxide makes and becomes carbon dioxide saturated absorption liquid.This absorption liquid to 304 Corrosion of Stainless Steel characteristics is: corrosion potential 0.01V, and from corrosion current 0.65 μ A.cm
-2
Embodiment 4
The aqueous solution is formed (mass percent): potash 20%, potassium borate 6%, sodium orthovanadate 1%; Sodium molybdate 0.5%; Zinc sulfate 0.08% contains phosphonate group poly-aspartate (organic phosphine content is 9.3 weight %, presses embodiment 7 preparations of Chinese patent CN1569922A) 0.05%.In the time of 90 ℃, the feeding carbon dioxide makes and becomes carbon dioxide saturated absorption liquid.This absorption liquid to 304 Corrosion of Stainless Steel characteristics is: corrosion potential 0.01V, and from corrosion current 0.68 μ A.cm
-2
Embodiment 5
The aqueous solution is formed (mass percent): potash 20%, potassium borate 6%, sodium orthovanadate 1%, sodium molybdate 0.5%, zinc sulfate 0.08%, calgon 0.04%, HEDPA0.05%.In the time of 90 ℃, the feeding carbon dioxide makes and becomes carbon dioxide saturated absorption liquid.This absorption liquid to 304 Corrosion of Stainless Steel characteristics is: corrosion potential 0.02V, and from corrosion current 0.50 μ A.cm
-2
Embodiment 6
The aqueous solution is formed (mass percent): potash 20%, and potassium borate 6%, sodium metavanadate 1%, sodium molybdate 0.5%, zinc sulfate 0.08%, PBTCA 0.05%.In the time of 90 ℃, the feeding carbon dioxide makes and becomes carbon dioxide saturated absorption liquid.This absorption liquid to 304 Corrosion of Stainless Steel characteristics is: corrosion potential 0.01V, and from corrosion current 0.68 μ A.cm
-2
Embodiment 7
The aqueous solution is formed (mass percent): potash 20%, and potassium borate 6%, sodium metavanadate 1%, sodium molybdate 0.5%, zinc sulfate 0.08%, HEDPA 0.05%.In the time of 90 ℃, the feeding carbon dioxide makes and becomes carbon dioxide saturated absorption liquid.This absorption liquid to 304 Corrosion of Stainless Steel characteristics is: corrosion potential 0.01V, and from corrosion current 0.70 μ A.cm
-2
Embodiment 8
The aqueous solution is formed (mass percent): potash 20%, and potassium borate 6%, sodium metavanadate 1%, sodium molybdate 0.5%, zinc sulfate 0.08%, HPAA 0.05%.In the time of 90 ℃, the feeding carbon dioxide makes and becomes carbon dioxide saturated absorption liquid.This absorption liquid to 304 Corrosion of Stainless Steel characteristics is: corrosion potential 0.01V, and from corrosion current 0.73 μ A.cm
-2
Embodiment 9
The aqueous solution is formed (mass percent): potash 20%, potassium borate 6%, sodium metavanadate 1%; Sodium molybdate 0.5%; Zinc sulfate 0.08% contains phosphonate group poly-aspartate (organic phosphine content is 7.3 weight %, presses embodiment 2 preparations of Chinese patent CN1569922A) 0.05%.In the time of 90 ℃, the feeding carbon dioxide makes and becomes carbon dioxide saturated absorption liquid.This absorption liquid to 304 Corrosion of Stainless Steel characteristics is: corrosion potential 0.01V, and from corrosion current 0.76 μ A.cm
-2
Embodiment 10
The aqueous solution is formed (mass percent): potash 20%, potassium borate 6%, sodium metavanadate 1%, sodium molybdate 0.5%, zinc sulfate 0.08%, calgon 0.04%, HEDPA0.05%.In the time of 90 ℃, the feeding carbon dioxide makes and becomes carbon dioxide saturated absorption liquid.This absorption liquid to 304 Corrosion of Stainless Steel characteristics is: corrosion potential 0.01V, and from corrosion current 0.65 μ A.cm
-2
Embodiment 11
The aqueous solution is formed (mass percent): potash 20%, potassium borate 6%, potassium metavanadate 1%, potassium molybdate 0.5%, zinc sulfate 0.08%, hexa metaphosphoric acid potassium 0.04%, HEDPA0.05%.In the time of 90 ℃, the feeding carbon dioxide makes and becomes carbon dioxide saturated absorption liquid.This absorption liquid to 304 Corrosion of Stainless Steel characteristics is: corrosion potential 0.02V, and from corrosion current 0.53 μ A.cm
-2
Embodiment 12
The aqueous solution is formed (mass percent): potash 20%, and potassium borate 6%, sodium metavanadate 1%, sodium molybdate 0.5%, zinc sulfate 0.08%, sodium phosphate 0.04%, HEDPA 0.05%.In the time of 90 ℃, the feeding carbon dioxide makes and becomes carbon dioxide saturated absorption liquid.This absorption liquid to 304 Corrosion of Stainless Steel characteristics is: corrosion potential 0.01V, and from corrosion current 0.66 μ A.cm
-2
Embodiment 13
The aqueous solution is formed (mass percent): potash 20%, potassium borate 6%, sodium metavanadate 1%, sodium molybdate 0.5%, zinc sulfate 0.08%, sodium phosphate trimer 0.04%, HEDPA0.05%.In the time of 90 ℃, the feeding carbon dioxide makes and becomes carbon dioxide saturated absorption liquid.This absorption liquid to 304 Corrosion of Stainless Steel characteristics is: corrosion potential 0.01V, and from corrosion current 0.74 μ A.cm
-2
Embodiment 14
The aqueous solution is formed (mass percent): potash 20%, and potassium borate 6%, sodium orthovanadate 1%, zinc sulfate 0.08%, sodium phosphate trimer 0.04%, HEDPA 0.05%.In the time of 90 ℃, the feeding carbon dioxide makes and becomes carbon dioxide saturated absorption liquid.This absorption liquid to 304 Corrosion of Stainless Steel characteristics is: corrosion potential-0.01V, and from corrosion current 0.92 μ A.cm
-2
Embodiment 15
The aqueous solution is formed (mass percent): potash 20%, and potassium borate 6%, sodium metavanadate 1%, zinc sulfate 0.08%, sodium phosphate trimer 0.04%, HEDPA 0.05%.In the time of 90 ℃, the feeding carbon dioxide makes and becomes carbon dioxide saturated absorption liquid.This absorption liquid to 304 Corrosion of Stainless Steel characteristics is: corrosion potential-0.04V, and from corrosion current 1.08 μ A.cm
-2
Embodiment 16
The aqueous solution is formed (mass percent): potash 20%, potassium borate 6%, sodium orthovanadate 1.6%, sodium molybdate 1.6%, zinc sulfate 0.08%, calgon 0.04%, HEDPA0.05%.In the time of 90 ℃, the feeding carbon dioxide makes and becomes carbon dioxide saturated absorption liquid.This absorption liquid to 304 Corrosion of Stainless Steel characteristics is: corrosion potential 0.02V, and from corrosion current 0.49 μ A.cm
-2
Embodiment 17
The aqueous solution is formed (mass percent): potash 20%, potassium borate 6%, sodium orthovanadate 1%, sodium molybdate 0.5%, zinc sulfate 0.2%, calgon 0.15%, HEDPA0.05%.In the time of 90 ℃, the feeding carbon dioxide makes and becomes carbon dioxide saturated absorption liquid.This absorption liquid to 304 Corrosion of Stainless Steel characteristics is: corrosion potential 0.02V, and from corrosion current 0.50 μ A.cm
-2
Embodiment 18
The aqueous solution is formed (mass percent): potash 20%, potassium borate 6%, sodium orthovanadate 1%, sodium molybdate 0.5%, zinc sulfate 0.08%, calgon 0.04%, HEDPA0.10%.In the time of 90 ℃, the feeding carbon dioxide makes and becomes carbon dioxide saturated absorption liquid.This absorption liquid to 304 Corrosion of Stainless Steel characteristics is: corrosion potential 0.02V, and from corrosion current 0.51 μ A.cm
-2
Embodiment 19
The aqueous solution is formed (mass percent): potash 20%, potassium borate 6%, sodium orthovanadate 1%, sodium molybdate 0.5%, zinc sulfate 0.08%, calgon 0.04%, HEDPA0.18%.In the time of 90 ℃, the feeding carbon dioxide makes and becomes carbon dioxide saturated absorption liquid.This absorption liquid to 304 Corrosion of Stainless Steel characteristics is: corrosion potential 0.02V, and from corrosion current 0.51 μ A.cm
-2
Comparative Examples 1
The aqueous solution (basic absorption liquid) is formed (mass percent): potash 20%, potassium borate 6%.In the time of 90 ℃, make and become carbon dioxide saturated absorption liquid to wherein feeding carbon dioxide.This absorption liquid to 304 Corrosion of Stainless Steel characterisitic parameters is: corrosion potential-0.15V, and from corrosion current 4.68 μ A.cm
-2, the relatively effect of different composite corrosion inhibiter.
Comparative Examples 2
The aqueous solution is formed (mass percent): potash 20%, potassium borate 6%, potassium vanadate 1% (vanadic anhydride is dissolved in potassium hydroxide and processes).In the time of 90 ℃, make and become carbon dioxide saturated absorption liquid to wherein feeding carbon dioxide.This absorption liquid to 304 Corrosion of Stainless Steel characterisitic parameters is: corrosion potential-0.10V, and from corrosion current 1.64 μ A.cm
-2
Comparative Examples 3
The aqueous solution is formed (mass percent): potash 20%, potassium borate 6%, sodium molybdate 1%.In the time of 90 ℃, make and become carbon dioxide saturated absorption liquid to wherein feeding carbon dioxide.This absorption liquid to 304 Corrosion of Stainless Steel characterisitic parameters is: corrosion potential-0.11V, and from corrosion current 1.78 μ A.cm
-2
Comparative Examples 4
The aqueous solution is formed (mass percent): potash 20%, potassium borate 6%, potassium vanadate 1% (vanadic anhydride is dissolved in potassium hydroxide and processes), sodium molybdate 0.5%.In the time of 90 ℃, make and become carbon dioxide saturated absorption liquid to wherein feeding carbon dioxide.This absorption liquid to 304 Corrosion of Stainless Steel characterisitic parameters is: corrosion potential-0.08V, and from corrosion current 1.55 μ A.cm
-2
The corrosion mitigating effect of embodiment and Comparative Examples sees table 1 for details.
The various corrosion inhibiter corrosion mitigating effects of table 1
Claims (10)
1. the composite corrosion inhibitor of a carbon dioxide eliminating system; It is made up of component A, B component, component C; Wherein, Component A is a kind of salt that is selected from water-soluble orthovanadate, water-soluble metavanadate, perhaps is a kind of in the mixture of water-soluble orthovanadate or water-soluble metavanadate and water-soluble molybdate; B component is at least a salt that is selected from water-soluble inorganic zinc salt and the water-soluble inorganic phosphate, and component C is a kind of organic phospho acid.
2. composite corrosion inhibitor according to claim 1 is characterized in that component A is a kind of in the mixture of water-soluble orthovanadate or water-soluble metavanadate and water-soluble molybdate.
3. composite corrosion inhibitor according to claim 1 and 2 is characterized by water-soluble orthovanadate and is selected from sodium orthovanadate or ortho-vanadic acid potassium, and metavanadate is selected from sodium metavanadate or potassium metavanadate, and molybdate is selected from sodium molybdate or potassium molybdate.
4. according to each described composite corrosion inhibitor of claim 1-3, it is characterized in that inorganic zinc salt is selected from zinc sulfate; Inorganic phosphate is selected from sylvite or sodium salt, preferably from hexa metaphosphoric acid potassium, PTPP, potassium phosphate, calgon, sodium phosphate trimer and sodium phosphate.
5. according to each described composite corrosion inhibitor of claim 1-4; It is characterized in that organic phospho acid is selected from 2-phosphate-1; 2,4-butane tricarboxylate, 1 hydroxyethylidine diphosphonate, 2-hydroxyethylidene diphosphonic acid guanidine-acetic acid and have a following general formula contain the phosphonate group poly-aspartate:
R wherein
1, R
2, R
3And R
4Be H or CH independently
2-PO
3H
2, the molecular weight of poly-aspartate is 2000-20000, with PO
4The content of weight meter organic phosphine is at least 2%.
6. according to each described composite corrosion inhibitor of claim 1-5, the total consumption that it is characterized in that component A is the 1.0-4.0% of pending aqueous solution quality.
7. according to each described composite corrosion inhibitor of claim 1-6, wherein total consumption of B component is the 0.04-0.4% of pending aqueous solution quality.
8. according to each described composite corrosion inhibitor of claim 1-7, wherein the consumption of component C component is the 0.02-0.2% of pending aqueous solution quality.
9. according to the purposes of described each composite corrosion inhibitor of claim 1-8, it is characterized in that each described corrosion inhibiter of claim 1-8 is used for the inhibition processing of carbon dioxide eliminating system.
10. the described purposes of claim 9 is characterized in that the carbon dioxide eliminating system is that ethylene oxide production plant removes carbon dioxide system.
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|---|---|---|---|
| CN201010520825.8A CN102451598B (en) | 2010-10-27 | 2010-10-27 | Composite corrosion inhibitor for carbon dioxide removing system and application thereof |
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| CN102451598B CN102451598B (en) | 2015-01-14 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110029337A (en) * | 2019-05-22 | 2019-07-19 | 安徽协同创新设计研究院有限公司 | A kind of processing method improving iron picture corrosion resistance |
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|---|---|---|---|---|
| CN1338437A (en) * | 2000-08-11 | 2002-03-06 | 中国石油化工股份有限公司 | Process for suppressing corrosion of cyclic cooling water |
| CN1706759A (en) * | 2004-06-09 | 2005-12-14 | 上海久安水质稳定剂厂 | Scale and corrosion inhibitor for continuous casting soft water and steel making soft water system |
| JP2008274388A (en) * | 2006-06-13 | 2008-11-13 | Asahi Kagaku Kogyo Co Ltd | Surface treatment agent, and steel sheet |
| CN101456537A (en) * | 2007-12-11 | 2009-06-17 | 南化集团研究院 | Method for reducing carbon dioxide in GTL synthesis cycle gas |
-
2010
- 2010-10-27 CN CN201010520825.8A patent/CN102451598B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1338437A (en) * | 2000-08-11 | 2002-03-06 | 中国石油化工股份有限公司 | Process for suppressing corrosion of cyclic cooling water |
| CN1706759A (en) * | 2004-06-09 | 2005-12-14 | 上海久安水质稳定剂厂 | Scale and corrosion inhibitor for continuous casting soft water and steel making soft water system |
| JP2008274388A (en) * | 2006-06-13 | 2008-11-13 | Asahi Kagaku Kogyo Co Ltd | Surface treatment agent, and steel sheet |
| CN101456537A (en) * | 2007-12-11 | 2009-06-17 | 南化集团研究院 | Method for reducing carbon dioxide in GTL synthesis cycle gas |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110029337A (en) * | 2019-05-22 | 2019-07-19 | 安徽协同创新设计研究院有限公司 | A kind of processing method improving iron picture corrosion resistance |
| CN110029337B (en) * | 2019-05-22 | 2021-07-30 | 安徽协同创新设计研究院有限公司 | Treatment method for improving corrosion resistance of iron picture |
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