CN105177592A - Seawater corrosion inhibitor applied to carbon steel and application method thereof - Google Patents
Seawater corrosion inhibitor applied to carbon steel and application method thereof Download PDFInfo
- Publication number
- CN105177592A CN105177592A CN201510560238.4A CN201510560238A CN105177592A CN 105177592 A CN105177592 A CN 105177592A CN 201510560238 A CN201510560238 A CN 201510560238A CN 105177592 A CN105177592 A CN 105177592A
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- China
- Prior art keywords
- corrosion inhibitor
- carbon steel
- sea water
- seawater
- corrosion
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- 230000007797 corrosion Effects 0.000 title claims abstract description 80
- 238000005260 corrosion Methods 0.000 title claims abstract description 80
- 239000013535 sea water Substances 0.000 title claims abstract description 73
- 239000003112 inhibitor Substances 0.000 title claims abstract description 50
- 229910000975 Carbon steel Inorganic materials 0.000 title claims abstract description 47
- 239000010962 carbon steel Substances 0.000 title claims abstract description 47
- 238000000034 method Methods 0.000 title claims description 15
- 229920000805 Polyaspartic acid Polymers 0.000 claims abstract description 14
- 108010064470 polyaspartate Proteins 0.000 claims abstract description 12
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 11
- NWONKYPBYAMBJT-UHFFFAOYSA-L zinc sulfate Chemical compound [Zn+2].[O-]S([O-])(=O)=O NWONKYPBYAMBJT-UHFFFAOYSA-L 0.000 claims abstract description 11
- 229960001763 zinc sulfate Drugs 0.000 claims abstract description 11
- 229910000368 zinc sulfate Inorganic materials 0.000 claims abstract description 11
- MEFBJEMVZONFCJ-UHFFFAOYSA-N molybdate Chemical compound [O-][Mo]([O-])(=O)=O MEFBJEMVZONFCJ-UHFFFAOYSA-N 0.000 claims abstract description 10
- TVXXNOYZHKPKGW-UHFFFAOYSA-N sodium molybdate (anhydrous) Chemical group [Na+].[Na+].[O-][Mo]([O-])(=O)=O TVXXNOYZHKPKGW-UHFFFAOYSA-N 0.000 claims description 8
- 230000000116 mitigating effect Effects 0.000 claims description 5
- 239000000463 material Substances 0.000 claims description 3
- 229910001209 Low-carbon steel Inorganic materials 0.000 claims description 2
- 230000003628 erosive effect Effects 0.000 claims description 2
- 230000002829 reductive effect Effects 0.000 claims description 2
- 230000005764 inhibitory process Effects 0.000 abstract description 14
- 230000000694 effects Effects 0.000 abstract description 5
- 230000002045 lasting effect Effects 0.000 abstract description 4
- AEQDJSLRWYMAQI-UHFFFAOYSA-N 2,3,9,10-tetramethoxy-6,8,13,13a-tetrahydro-5H-isoquinolino[2,1-b]isoquinoline Chemical compound C1CN2CC(C(=C(OC)C=C3)OC)=C3CC2C2=C1C=C(OC)C(OC)=C2 AEQDJSLRWYMAQI-UHFFFAOYSA-N 0.000 abstract 1
- 229940005574 sodium gluconate Drugs 0.000 abstract 1
- 235000012207 sodium gluconate Nutrition 0.000 abstract 1
- 239000000176 sodium gluconate Substances 0.000 abstract 1
- 239000002994 raw material Substances 0.000 description 13
- 239000002131 composite material Substances 0.000 description 7
- 238000007654 immersion Methods 0.000 description 6
- 238000010998 test method Methods 0.000 description 6
- 230000004580 weight loss Effects 0.000 description 6
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 3
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 229910052760 oxygen Inorganic materials 0.000 description 3
- 239000001301 oxygen Substances 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 239000012528 membrane Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 239000007769 metal material Substances 0.000 description 2
- 230000001681 protective effect Effects 0.000 description 2
- 230000002269 spontaneous effect Effects 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 125000003178 carboxy group Chemical group [H]OC(*)=O 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 239000003792 electrolyte Substances 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000005530 etching Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000028161 membrane depolarization Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000006386 neutralization reaction Methods 0.000 description 1
- 231100000252 nontoxic Toxicity 0.000 description 1
- 230000003000 nontoxic effect Effects 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000002335 preservative effect Effects 0.000 description 1
- 230000000452 restraining effect Effects 0.000 description 1
- 239000011780 sodium chloride Substances 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 230000002195 synergetic effect Effects 0.000 description 1
Landscapes
- Preventing Corrosion Or Incrustation Of Metals (AREA)
Abstract
The invention provides a seawater corrosion inhibitor applied to carbon steel. The seawater corrosion inhibitor is characterized by being prepared from the following components in percentage by mass: 2-10% of polyaspartic acid, 2-8% of sodium gluconate, 3-5% of molybdate, 4-8% of zinc sulfate and the balance being water. The seawater corrosion inhibitor applied to carbon steel has high inhibition effect on the corrosion of the carbon steel in the seawater, is excellent in inhibition lasting effect, low in cost and strong in practicability, and is environmentally friendly.
Description
Technical field
The invention belongs to marine environment and guard technology field, specifically refer to a kind of carbon steel corrosion inhibitor of sea water and application method thereof.
Background technology
Metallic corrosion is a kind of failure procedure of metal under the effect of environmental corrosion medium, is the inverse process of metallurgical production, and because entropy constantly increases, therefore this is a kind of completely spontaneous inevitable spontaneous phenomenon of carrying out.Ocean environment has extremely strong and complicated corrodibility, the metallic substance corrosion that especially severe usually occurs in the seawater.Metallic substance is once corrode, and its mechanical property will reduce, and due intensity, hardness, plasticity also can be lost, and causes material complete failure, and structure is completely destroyed.The financial loss caused because of sea-water corrosion is every year very surprising.
Take NaCl as main electrolyte in seawater, and be dissolved with a certain amount of oxygen, most of carbon steel is all easily corroded in the seawater.Wave, splashing, flow velocity etc. these be conducive to the envrionment conditions of oxygen supply, more can promote that the cathodic depolarization of oxygen reacts, impel the accelerated corrosion of carbon steel.
Adding inhibiter is in the seawater one of effective measure of carrying out corrosionproof protection to carbon steel.Corrosion inhibitor of sea water can effectively stop or slow down the corrosion speed of seawater to carbon steel, and easy to use, adding less, instant effect, and therefore neutralization technology has become main anticorrosion means.But not only cost is high for conventional inhibiter, and inhibition lasting effect is not good, and be unfavorable for degraded, unfriendly to environment.
Summary of the invention
The object of the invention is to provide a kind of carbon steel corrosion inhibitor of sea water according to above-mentioned deficiency, this inhibiter not only has good restraining effect to carbon steel corrosion in the seawater, and suppresses lasting effect good, and cost is low, environmentally friendly.
Technical scheme of the present invention is as follows: a kind of carbon steel corrosion inhibitor of sea water, is characterized in that: it is mixed according to mass percent by following component: poly aspartic acid 2 ~ 10%, Sunmorl N 60S 2 ~ 8%, molybdate 3 ~ 5%, zinc sulfate 4 ~ 8%, surplus are water.
Further, described carbon steel corrosion inhibitor of sea water is mixed according to mass percent by following component: poly aspartic acid 10%, Sunmorl N 60S 8%, molybdate 5%, zinc sulfate 5%, surplus are water.
Further, described molybdate is Sodium orthomolybdate.
Another object of the present invention is to provide the application method of above-mentioned carbon steel corrosion inhibitor of sea water, it is characterized in that: the corrosion inhibitor of sea water of described mass percent is directly added in seawater, its addition is 110 ~ 190mg/L, the erosion rate of seawater mild steel material or carbon steel component can be reduced, obtain good corrosion mitigating effect.
Further, the addition of described corrosion inhibitor of sea water is 135 ~ 170mg/L.
Further, the addition of described corrosion inhibitor of sea water is 150mg/L.
Containing the adsorption group such as-NH ,-OH ,-COOH ,-C=O in the poly aspartic acid molecule that the present invention adopts, can effective coordinated metal atom, enable the organic molecule of inhibiter of the present invention be adsorbed on steel surface, formation protective membrane, plays the effect of inhibition.And molybdate, Sunmorl N 60S have good biological degradability, by the effect of synergistic slow corrosion can be played after composite, be conducive to the raising of corrosion inhibition.By not only environmentally friendly after molybdate and Sunmorl N 60S coupling, and can greatly improve the corrosion mitigating effect of carbon steel.
Beneficial effect of the present invention is as follows:
Corrosion inhibitor of sea water of the present invention forms stable complex compound protective membrane at steel surface and effectively inhibits seawater to the corrosion of carbon steel, improves the quality of products.And corrosion inhibitor of sea water of the present invention is organic inhibitor, nontoxic, can degrade, environmentally friendly, belong to green corrosion inhibitor.Meanwhile, corrosion inhibitor of sea water raw material of the present invention is simple and easy to get, cheap, can save cost, and preparation method is simple, also only need mix.In addition during corrosion inhibitor of sea water application of the present invention, usage quantity is few, just effectively can suppress the corrosion of carbon steel, and continuous action ability is strong, can keep higher corrosion inhibition the long period, practical.
Accompanying drawing explanation
Fig. 1 is the corrosion inhibition rate-etching time graph of a relation of corrosion inhibitor of sea water of the present invention and existing corrosion inhibitor of sea water;
Wherein 1-poly aspartic acid corrosion inhibitor of sea water, the corrosion inhibitor of sea water of 2-poly aspartic acid and molybdate combination, the carbon steel corrosion inhibitor of sea water 1 of 3-embodiment 1.
Embodiment
The present invention is further illustrated below in conjunction with the drawings and specific embodiments:
Embodiment 1
Mass percent pressed by raw material: poly aspartic acid 10%, Sunmorl N 60S 8%, Sodium orthomolybdate 5%, zinc sulfate 5%, water 72%, makes carbon steel corrosion inhibitor of sea water 1 by composite for these raw material Homogeneous phase mixing.
Carry out weight loss test according to GB10124-88 " Uniform Corrosion Method of Laboratory Immersion Test method ", test(ing) medium is synthetic sea water.Experimental result is: be 30 DEG C in temperature, and carbon steel corrosion inhibitor of sea water 1 adds concentration when being 150mg/L, is 91.7% to Q235 carbon steel corrosion inhibition rate in seawater.
As shown in Figure 1, existing corrosion inhibitor of sea water is figure center line 1 and line 2, and corrosion inhibitor of sea water 1 of the present invention is figure center line 3.Not only corrosion mitigating effect is good for corrosion inhibitor of sea water of the present invention as seen from the figure, and inhibition speed is fast, and continue to nearly 30 days corrosion mitigating effects without obvious decline, lasting effect is good.
Embodiment 2
Mass percent pressed by raw material: poly aspartic acid 10%, Sunmorl N 60S 8%, Sodium orthomolybdate 5%, zinc sulfate 5%, water 72%, makes carbon steel corrosion inhibitor of sea water 2 by composite for these raw material Homogeneous phase mixing.
Carry out weight loss test according to GB10124-88 " Uniform Corrosion Method of Laboratory Immersion Test method ", test(ing) medium is synthetic sea water.Experimental result is: be 20 DEG C in temperature, and carbon steel corrosion inhibitor of sea water 2 adds concentration when being 150mg/L, is 85.9% to Q235 carbon steel corrosion inhibition rate in seawater.
Embodiment 3
Mass percent pressed by raw material: poly aspartic acid 5%, Sunmorl N 60S 4%, Sodium orthomolybdate 3%, zinc sulfate 4%, water 84%, makes carbon steel corrosion inhibitor of sea water 3 by composite for these raw material Homogeneous phase mixing.
Carry out weight loss test according to GB10124-88 " Uniform Corrosion Method of Laboratory Immersion Test method ", test(ing) medium is synthetic sea water.Experimental result is: be 30 DEG C in temperature, and carbon steel corrosion inhibitor of sea water 3 adds concentration when being 150mg/L, is 85.3% to Q235 carbon steel corrosion inhibition rate in seawater.
Embodiment 4
Mass percent pressed by raw material: poly aspartic acid 6%, Sunmorl N 60S 4%, Sodium orthomolybdate 4%, zinc sulfate 4%, water 82%, makes carbon steel corrosion inhibitor of sea water 4 by composite for these raw material Homogeneous phase mixing.
Carry out weight loss test according to GB10124-88 " Uniform Corrosion Method of Laboratory Immersion Test method ", test(ing) medium is synthetic sea water.Experimental result is: be 30 DEG C in temperature, and carbon steel corrosion inhibitor of sea water 4 adds concentration when being 150mg/L, is 89.2% to Q235 carbon steel corrosion inhibition rate in seawater.
Embodiment 5
Mass percent pressed by raw material: poly aspartic acid 10%, Sunmorl N 60S 8%, Sodium orthomolybdate 5%, zinc sulfate 5%, water 72%, makes carbon steel corrosion inhibitor of sea water 5 by composite for these raw material Homogeneous phase mixing.
Carry out weight loss test according to GB10124-88 " Uniform Corrosion Method of Laboratory Immersion Test method ", test(ing) medium is synthetic sea water.Experimental result is: be 50 DEG C in temperature, and carbon steel corrosion inhibitor of sea water 5 adds concentration when being 150mg/L, is 78.7% to Q235 carbon steel corrosion inhibition rate in seawater.
Embodiment 6
Mass percent pressed by raw material: poly aspartic acid 2%, Sunmorl N 60S 2%, Sodium orthomolybdate 4%, zinc sulfate 8%, water 84%, makes carbon steel corrosion inhibitor of sea water 6 by composite for these raw material Homogeneous phase mixing.
Carry out weight loss test according to GB10124-88 " Uniform Corrosion Method of Laboratory Immersion Test method ", test(ing) medium is synthetic sea water.Experimental result is: be 30 DEG C in temperature, and carbon steel corrosion inhibitor of sea water 6 adds concentration when being 150mg/L, is 81.7% to Q235 carbon steel corrosion inhibition rate in seawater.
Can be found out by above-described embodiment, with carbon steel corrosion inhibitor of sea water of the present invention when addition is only 150mg/L, just can play good preservative effect to carbon steel, there is very strong practicality.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (6)
1. a carbon steel corrosion inhibitor of sea water, is characterized in that: it is mixed according to mass percent by following component: poly aspartic acid 2 ~ 10%, Sunmorl N 60S 2 ~ 8%, molybdate 3 ~ 5%, zinc sulfate 4 ~ 8%, surplus are water.
2. carbon steel corrosion inhibitor of sea water according to claim 1, is characterized in that: it is mixed according to mass percent by following component: poly aspartic acid 10%, Sunmorl N 60S 8%, molybdate 5%, zinc sulfate 5%, surplus are water.
3. carbon steel corrosion inhibitor of sea water according to claim 1 and 2, is characterized in that: described molybdate is Sodium orthomolybdate.
4. the application method of carbon steel corrosion inhibitor of sea water described in a claim 1, it is characterized in that: the corrosion inhibitor of sea water of described mass percent is directly added in seawater, its addition is 110 ~ 190mg/L, the erosion rate of seawater mild steel material or carbon steel component can be reduced, obtain good corrosion mitigating effect.
5. the application method of carbon steel corrosion inhibitor of sea water according to claim 4, is characterized in that: the addition of described corrosion inhibitor of sea water is 135 ~ 170mg/L.
6. the application method of carbon steel corrosion inhibitor of sea water according to claim 4, is characterized in that: the addition of described corrosion inhibitor of sea water is 150mg/L.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510560238.4A CN105177592B (en) | 2015-09-02 | 2015-09-02 | Carbon steel corrosion inhibitor of sea water and its application process |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510560238.4A CN105177592B (en) | 2015-09-02 | 2015-09-02 | Carbon steel corrosion inhibitor of sea water and its application process |
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| CN105177592A true CN105177592A (en) | 2015-12-23 |
| CN105177592B CN105177592B (en) | 2018-08-03 |
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| CN201510560238.4A Active CN105177592B (en) | 2015-09-02 | 2015-09-02 | Carbon steel corrosion inhibitor of sea water and its application process |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106287899A (en) * | 2016-08-16 | 2017-01-04 | 重庆中节能三峰能源有限公司 | Industrial exhaust heat ground heating system |
| CN107653453A (en) * | 2017-09-06 | 2018-02-02 | 贵州民族大学 | A kind of compound corrosion inhibitor for being applied to Q235 steel and copper alloy galvanic couple and preparation method thereof |
| CN107675183A (en) * | 2017-09-06 | 2018-02-09 | 贵州民族大学 | A kind of compound corrosion inhibitor for being applied to N80 steel and stainless steel galvanic couple and preparation method thereof |
| CN110184610A (en) * | 2019-07-02 | 2019-08-30 | 李必群 | A kind of seawater circulation water environmental protection carbon steel composite corrosion inhibitor and preparation method thereof |
| CN110952103A (en) * | 2019-12-06 | 2020-04-03 | 万华化学集团股份有限公司 | Carbon steel corrosion inhibitor for oxygen-containing salt water and preparation method thereof |
| CN112553610A (en) * | 2019-09-10 | 2021-03-26 | 天津大学 | Carbon steel surface in-situ self-assembly metal-polyaspartic acid anticorrosive film and preparation method and application thereof |
| CN115354331A (en) * | 2022-08-22 | 2022-11-18 | 国网新疆电力有限公司电力科学研究院 | A kind of metal anticorrosion sustained-release microcapsule and its preparation method and application |
| CN119430395A (en) * | 2024-10-29 | 2025-02-14 | 谭明国 | Carbon steel corrosion resistance method for typical water quality in thermal and nuclear power plants |
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| CN102557276A (en) * | 2010-12-17 | 2012-07-11 | 上海洗霸科技股份有限公司 | Composite water treatment agent of closed type circulating water system |
| CN103225081A (en) * | 2013-04-26 | 2013-07-31 | 武汉钢铁(集团)公司 | Corrosion inhibitor used in carbon steel corrosion in ammonia-method desulphurization ammonium sulfate preparation system |
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2015
- 2015-09-02 CN CN201510560238.4A patent/CN105177592B/en active Active
Patent Citations (3)
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| CH697611B1 (en) * | 2004-01-17 | 2008-12-15 | Marcel Christian Wegmueller | Process for conditioning Mountain Water in primary drainage systems of tunnels. |
| CN102557276A (en) * | 2010-12-17 | 2012-07-11 | 上海洗霸科技股份有限公司 | Composite water treatment agent of closed type circulating water system |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106287899A (en) * | 2016-08-16 | 2017-01-04 | 重庆中节能三峰能源有限公司 | Industrial exhaust heat ground heating system |
| CN107653453A (en) * | 2017-09-06 | 2018-02-02 | 贵州民族大学 | A kind of compound corrosion inhibitor for being applied to Q235 steel and copper alloy galvanic couple and preparation method thereof |
| CN107675183A (en) * | 2017-09-06 | 2018-02-09 | 贵州民族大学 | A kind of compound corrosion inhibitor for being applied to N80 steel and stainless steel galvanic couple and preparation method thereof |
| CN107675183B (en) * | 2017-09-06 | 2019-11-08 | 贵州民族大学 | A compound corrosion inhibitor suitable for N80 steel and stainless steel galvanic couple and preparation method thereof |
| CN107653453B (en) * | 2017-09-06 | 2019-11-08 | 贵州民族大学 | A compound corrosion inhibitor suitable for Q235 steel and copper alloy galvanic couple and preparation method thereof |
| CN110184610A (en) * | 2019-07-02 | 2019-08-30 | 李必群 | A kind of seawater circulation water environmental protection carbon steel composite corrosion inhibitor and preparation method thereof |
| CN110184610B (en) * | 2019-07-02 | 2021-08-03 | 李必群 | Seawater circulating water environment-friendly carbon steel composite corrosion inhibitor and preparation method thereof |
| CN112553610A (en) * | 2019-09-10 | 2021-03-26 | 天津大学 | Carbon steel surface in-situ self-assembly metal-polyaspartic acid anticorrosive film and preparation method and application thereof |
| CN110952103A (en) * | 2019-12-06 | 2020-04-03 | 万华化学集团股份有限公司 | Carbon steel corrosion inhibitor for oxygen-containing salt water and preparation method thereof |
| CN115354331A (en) * | 2022-08-22 | 2022-11-18 | 国网新疆电力有限公司电力科学研究院 | A kind of metal anticorrosion sustained-release microcapsule and its preparation method and application |
| CN119430395A (en) * | 2024-10-29 | 2025-02-14 | 谭明国 | Carbon steel corrosion resistance method for typical water quality in thermal and nuclear power plants |
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| CN105177592B (en) | 2018-08-03 |
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