CN105177592B - Carbon steel corrosion inhibitor of sea water and its application process - Google Patents
Carbon steel corrosion inhibitor of sea water and its application process Download PDFInfo
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- CN105177592B CN105177592B CN201510560238.4A CN201510560238A CN105177592B CN 105177592 B CN105177592 B CN 105177592B CN 201510560238 A CN201510560238 A CN 201510560238A CN 105177592 B CN105177592 B CN 105177592B
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- corrosion inhibitor
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Abstract
The present invention provides a kind of carbon steel corrosion inhibitor of sea water, it is characterised in that：It is mixed according to mass percent by following component：Poly-aspartate 2~10%, sodium gluconate 2~8%, molybdate 3~5%, zinc sulfate 4~8%, surplus are water.The carbon steel corrosion inhibitor of sea water of the present invention not only has good inhibiting effect to the corrosion of carbon steel in the seawater, but also inhibits lasting effect good, at low cost, environmentally friendly, has very strong practicability.
Description
Technical field
The invention belongs to marine environment and protection technology field, in particular to a kind of carbon steel corrosion inhibitor of sea water and its
Application process.
Background technology
Metal erosion is a kind of failure procedure of the metal under the effect of environmental corrosion medium, is the inverse process of metallurgical production,
Since entropy is continuously increased, this is a kind of inevitable natural phenomena of spontaneous progress completely.Marine environment have it is extremely strong and
And complicated corrosivity, metal material in the seawater it occur frequently that the corrosion of especially severe.Metal material once corrodes,
Its mechanical performance will reduce, and due intensity, hardness, plasticity can also be lost, and cause material entirely ineffective, and structure is broken completely
It is bad.Economic loss is extremely surprising caused by seawater corrosion every year.
Using NaCl as main electrolyte in seawater, and it is dissolved with a certain amount of oxygen, makes most of carbon steels in the seawater
All easily corrode.These are conducive to the environmental condition supplied oxygen for wave, splashing, flow velocity etc., and the cathodic depolarization of oxygen but will be promoted anti-
It answers, promotes the accelerated corrosion of carbon steel.
Addition corrosion inhibiter is one of the effective measures that anti-corrosion protection is carried out to carbon steel in the seawater.Corrosion inhibitor of sea water can have
The prevention of effect slows down corrosion rate of the seawater to carbon steel, and easy to use, adding less, quick, therefore neutralization technology
Have become main anti-corrosion means.But commonly corrosion inhibiter is not only of high cost, inhibition lasting effect is bad, and is unfavorable for
Degradation, it is unfriendly to environment.
Invention content
The purpose of the present invention is according to a kind of above-mentioned insufficient carbon steel corrosion inhibitor of sea water of offer, the corrosion inhibiter is not only to carbon steel
Corrosion in the seawater has good inhibiting effect, and inhibits lasting effect good, at low cost, environmentally friendly.
Technical scheme is as follows：A kind of carbon steel corrosion inhibitor of sea water, it is characterised in that：It is by following component by
It is mixed according to mass percent：Poly-aspartate 2~10%, sodium gluconate 2~8%, molybdate 3~5%, zinc sulfate 4
~8%, surplus is water.
Further, the carbon steel with corrosion inhibitor of sea water is mixed according to mass percent by following component：Poly- day
Winter propylhomoserin 10%, sodium gluconate 8%, molybdate 5%, zinc sulfate 5%, surplus are water.
Further, the molybdate is sodium molybdate.
It is a further object to provide the application processes of above-mentioned carbon steel corrosion inhibitor of sea water, it is characterised in that：It will
The corrosion inhibitor of sea water of the mass percent is directly appended in seawater, and additive amount is 110~190mg/L, you can is reduced
The corrosion rate of seawater mild steel material or carbon steel component obtains good corrosion mitigating effect.
Further, the additive amount of the corrosion inhibitor of sea water is 135~170mg/L.
Further, the additive amount of the corrosion inhibitor of sea water is 150mg/L.
Containing adsorption groups such as-NH ,-OH ,-COOH ,-C=O in the poly-aspartate molecule that the present invention uses, can effectively match
Position metallic atom, enables the organic molecule of corrosion inhibiter of the present invention to be adsorbed on carbon steel surface, forms protective film, plays the work of inhibition
With.And molybdate, sodium gluconate have good biological degradability, by the way that synergistic slow corrosion can be played the role of after compounding,
Be conducive to the raising of corrosion inhibition.It is not only environmentally friendly after molybdate is combined with sodium gluconate, but also carbon steel is delayed
Erosion effect can greatly improve.
Beneficial effects of the present invention are as follows：
The corrosion inhibitor of sea water of the present invention forms stable complex compound protective film on carbon steel surface and effectively inhibits seawater pair
The corrosion of carbon steel improves product quality.And the corrosion inhibitor of sea water of the present invention is organic inhibitor, it is nontoxic, it can degrade,
It is environmentally friendly, belong to green corrosion inhibitor.Meanwhile corrosion inhibitor of sea water raw material of the invention is simple and easy to get, cheap, Neng Goujie
Cost-saving, preparation method is simple, also need to only mix.In addition corrosion inhibitor of sea water of the invention is in application, usage amount is few, so that it may
Effectively to inhibit the corrosion of carbon steel, continuous action ability is strong, can keep higher corrosion inhibition, practicability the long period
By force.
Description of the drawings
Fig. 1 is corrosion inhibition rate-etching time relational graph of the corrosion inhibitor of sea water and existing corrosion inhibitor of sea water of the present invention；
Wherein 1- poly-aspartates corrosion inhibitor of sea water, the corrosion inhibitor of sea water of 2- poly-aspartates and molybdate combination, 3- are real
Apply the carbon steel corrosion inhibitor of sea water 1 of example 1.
Specific implementation mode
It is further illustrated the present invention below in conjunction with the drawings and specific embodiments：
Embodiment 1
Raw material is by weight percent：Poly-aspartate 10%, sodium gluconate 8%, sodium molybdate 5%, zinc sulfate 5%, water
72%, these raw materials are uniformly mixed to compounding, carbon steel corrosion inhibitor of sea water 1 is made.
According to GB10124-88《Uniform Corrosion Method of Laboratory Immersion Test method》Carry out weight loss experiment, examination
It is artificial sea water to test medium.Experimental result is：It is 30 DEG C in temperature, when carbon steel corrosion inhibitor of sea water 1 adds a concentration of 150mg/L,
It is 91.7% to Q235 carbon steels corrosion inhibition rate in seawater.
As shown in Figure 1, existing corrosion inhibitor of sea water is figure center line 1 and line 2, corrosion inhibitor of sea water 1 of the invention is figure center line
3.Not only corrosion mitigating effect is good for corrosion inhibitor of sea water of the invention as seen from the figure, but also inhibition speed is fast, continues slow to nearly 30 days
Effect is lost without being decreased obviously, and lasting effect is good.
Embodiment 2
Raw material is by weight percent：Poly-aspartate 10%, sodium gluconate 8%, sodium molybdate 5%, zinc sulfate 5%, water
72%, these raw materials are uniformly mixed to compounding, carbon steel corrosion inhibitor of sea water 2 is made.
According to GB10124-88《Uniform Corrosion Method of Laboratory Immersion Test method》Carry out weight loss experiment, examination
It is artificial sea water to test medium.Experimental result is：It is 20 DEG C in temperature, when carbon steel corrosion inhibitor of sea water 2 adds a concentration of 150mg/L,
It is 85.9% to Q235 carbon steels corrosion inhibition rate in seawater.
Embodiment 3
Raw material is by weight percent：Poly-aspartate 5%, sodium gluconate 4%, sodium molybdate 3%, zinc sulfate 4%, water
84%, these raw materials are uniformly mixed to compounding, carbon steel corrosion inhibitor of sea water 3 is made.
According to GB10124-88《Uniform Corrosion Method of Laboratory Immersion Test method》Carry out weight loss experiment, examination
It is artificial sea water to test medium.Experimental result is：It is 30 DEG C in temperature, when carbon steel corrosion inhibitor of sea water 3 adds a concentration of 150mg/L,
It is 85.3% to Q235 carbon steels corrosion inhibition rate in seawater.
Embodiment 4
Raw material is by weight percent：Poly-aspartate 6%, sodium gluconate 4%, sodium molybdate 4%, zinc sulfate 4%, water
82%, these raw materials are uniformly mixed to compounding, carbon steel corrosion inhibitor of sea water 4 is made.
According to GB10124-88《Uniform Corrosion Method of Laboratory Immersion Test method》Carry out weight loss experiment, examination
It is artificial sea water to test medium.Experimental result is：It is 30 DEG C in temperature, when carbon steel corrosion inhibitor of sea water 4 adds a concentration of 150mg/L,
It is 89.2% to Q235 carbon steels corrosion inhibition rate in seawater.
Embodiment 5
Raw material is by weight percent：Poly-aspartate 10%, sodium gluconate 8%, sodium molybdate 5%, zinc sulfate 5%, water
72%, these raw materials are uniformly mixed to compounding, carbon steel corrosion inhibitor of sea water 5 is made.
According to GB10124-88《Uniform Corrosion Method of Laboratory Immersion Test method》Carry out weight loss experiment, examination
It is artificial sea water to test medium.Experimental result is：It is 50 DEG C in temperature, when carbon steel corrosion inhibitor of sea water 5 adds a concentration of 150mg/L,
It is 78.7% to Q235 carbon steels corrosion inhibition rate in seawater.
Embodiment 6
Raw material is by weight percent：Poly-aspartate 2%, sodium gluconate 2%, sodium molybdate 4%, zinc sulfate 8%, water
84%, these raw materials are uniformly mixed to compounding, carbon steel corrosion inhibitor of sea water 6 is made.
According to GB10124-88《Uniform Corrosion Method of Laboratory Immersion Test method》Carry out weight loss experiment, examination
It is artificial sea water to test medium.Experimental result is：It is 30 DEG C in temperature, when carbon steel corrosion inhibitor of sea water 6 adds a concentration of 150mg/L,
It is 81.7% to Q235 carbon steels corrosion inhibition rate in seawater.
It can be seen from above-described embodiment that being only 150mg/L in additive amount with the carbon steel of the present invention with corrosion inhibitor of sea water
When, good anti-corrosion effect can be played to carbon steel, and there is very strong practicability.
The foregoing is merely presently preferred embodiments of the present invention, is not intended to limit the invention, it is all the present invention spirit and
Within principle, any modification, equivalent replacement, improvement and so on should all be included in the protection scope of the present invention.
Claims (5)
1. a kind of carbon steel corrosion inhibitor of sea water, it is characterised in that：It is mixed according to mass percent by following component：It is poly-
Aspartic acid 10%, sodium gluconate 8%, molybdate 5%, zinc sulfate 5%, surplus are water.
2. carbon steel corrosion inhibitor of sea water according to claim 1, it is characterised in that：The molybdate is sodium molybdate.
3. the application process of carbon steel corrosion inhibitor of sea water described in a kind of claim 1, it is characterised in that：By the mass percent
Corrosion inhibitor of sea water be directly appended in seawater, additive amount be 110~190mg/L, you can reduce seawater mild steel material
Or the corrosion rate of carbon steel component, obtain good corrosion mitigating effect.
4. the application process of carbon steel corrosion inhibitor of sea water according to claim 3, it is characterised in that：The corrosion inhibitor of sea water
Additive amount is 135~170mg/L.
5. the application process of carbon steel corrosion inhibitor of sea water according to claim 3, it is characterised in that：The corrosion inhibitor of sea water
Additive amount is 150mg/L.
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| 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 |
| CN107675183B (en) * | 2017-09-06 | 2019-11-08 | 贵州民族大学 | A kind of compound corrosion inhibitor and preparation method thereof suitable for N80 steel and stainless steel galvanic couple |
| CN107653453B (en) * | 2017-09-06 | 2019-11-08 | 贵州民族大学 | A kind of compound corrosion inhibitor and preparation method thereof suitable for Q235 steel and copper alloy galvanic couple |
| 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 |
| CN115354331B (en) * | 2022-08-22 | 2023-07-28 | 国网新疆电力有限公司电力科学研究院 | Metal anti-corrosion slow-release microcapsule and preparation method and application thereof |
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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 |
| 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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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| 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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Effective date of registration: 20170731 Address after: 430083, Hubei Wuhan Qingshan District Factory No. 2 Gate joint stock company organs Applicant after: Wuhan iron and Steel Company Limited Address before: 15 Wuchang, Wuhan Friendship Avenue, No. 999, block A, layer (Wuhan Iron and steel science and technology innovation department), No. 430080, Applicant before: Wuhan Iron & Steel (Group) Corp. |
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