CN105154885A - Application of efficient corrosion inhibitor - Google Patents
Application of efficient corrosion inhibitor Download PDFInfo
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- CN105154885A CN105154885A CN201510578279.6A CN201510578279A CN105154885A CN 105154885 A CN105154885 A CN 105154885A CN 201510578279 A CN201510578279 A CN 201510578279A CN 105154885 A CN105154885 A CN 105154885A
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Abstract
The invention relates to a metal zinc seawater corrosion inhibitor, in particular to application of an efficient corrosion inhibitor. The efficient corrosion inhibitor is sulfate polysaccharide Fucoidan shown in the formula I, which is applied to zinc and metal products of zinc to serve as a corrosion-resistant inhibitor. The efficient corrosion inhibitor is low in use level, good for environment protection, high in efficiency and long in sustained action time, can effectively inhibit metal zinc from corrosion and damage, and has a wide application prospect.
Description
Technical field
The present invention relates to the corrosion inhibitor of sea water of metallic zinc, specifically a kind of high-efficient corrosion inhibitor application.
Background technology
Along with the arrival of numerical ocean model, the eye of development has been invested ocean by the mankind gradually.But seawater brings many disasters and huge financial loss to the mankind because of its strong corrodibility.Therefore, metallic substance etching problem is in the seawater solved extremely urgent.Inhibiter plays a part to become more and more important in exploitation and using of seawater process with the superiority of its uniqueness.
Zinc is a kind of important non-ferrous metal, occupies the 4th in global consumption and production amount.Metallic zinc has that outward appearance is beautiful, heat conduction, conduct electricity very well, oxidation corrosion product is nontoxic, the feature such as free from environmental pollution, and in metal protection technique, be often used as thermospray, hot dip process material, thus, in many branchs of industry such as electronics, electric power, aviation, chemical industry, building materials, traffic and daily life, obtain and apply widely.But zinc is vulnerable to corrosion in acidity or basic solution, and its oxide film is also all soluble in acid or alkaline solution, thus solves the extremely urgent of zine corrosion problem.
At present, had a lot of bibliographical information to cross the corrosion inhibitor of sea water of metallic zinc, organic inhibitor has very large application prospect, but there is toxicity problem.
Summary of the invention
The object of the present invention is to provide a kind of nontoxic, environmental protection, high-efficient corrosion inhibitor application efficiently.
The present invention adopts technical scheme to be for achieving the above object:
A kind of high-efficient corrosion inhibitor, high-efficient corrosion inhibitor is the sulfated polysaccharides Fucoidan shown in formula one,
The application of high-efficient corrosion inhibitor, the sulfated polysaccharides Fucoidan shown in formula one is applied in zinc and metal products thereof as anticorrosion corrosion inhibitor.
Be the anticorrosion corrosion inhibitor of zinc in the medium of 0.1%-5% (weight) sodium-chlor and metal products thereof as seawater or concentration using formula one compound.
The amount of described often liter of medium or seawater Chinese style one compound is 20-150mg, and solution medium temperature is 15-30 DEG C, pH is 8-9.
The advantage that the present invention has:
1. cost is low.Inhibiter effective constituent of the present invention is fucoidan, is to extract to obtain from phaeophyta plant (as kelp, sea-tangle), and raw material is easy to get, cheap, and it is convenient to buy.
2. environmental protection.Inhibiter of the present invention is compared with traditional organic zinc inhibiter with inorganic inhibitor conventional at present, is a kind of water miscible fiber, and is applied to pharmaceutical industries preventing cancer, so be a kind of inhibiter of environmental protection.
3. high efficiency.The present invention adds the destruction that a small amount of inhibiter just can effectively suppress metallic zinc in Seawater, and inhibition efficiency can reach about 84%.
4. good endurance.Inhibiter of the present invention has excellent weather resistance, can keep higher corrosion inhibition for a long time.
Accompanying drawing illustrates:
Fig. 1 is experiment gained SEM figure, wherein, and the electrode surface of (a) newly polishing; 7d is soaked in (b) natural sea-water; C () adds in the natural sea-water of 110mg inhibiter and soaks 7d, temperature remains on 298K.Upper as can be seen from figure: compared with the electrode surface of newly polishing, soak electrode surface generation severe pitting in the seawater, and after adding inhibiter, this phenomenon significantly to be controlled, so Fucoidan plays good preservative effect at seawater to zinc.
Embodiment
The present invention is specifically: take a certain amount of fucoidan compound and directly add in natural sea-water and fully dissolve; thus just can carry out anti-corrosion protection to the zinc in Seawater and metal products thereof; wherein in often liter of Seawater, the amount of fucoidan compound is 20-150mg; solution temperature is 15-30 DEG C; Immersion time is that (soak time is relevant to the characteristic of metal material and inhibiter for 20-30min; be metal and solution interface characteristic and reach the stable required time; the required soak time of this experiment is about 30min), pH is 8-9.
The present invention adopts conventional electrochemistry experiment: electrochemical impedance and potentiodynamic polarization determine fucoidan impact on the corrosion behavior of metallic zinc in Seawater, is observed the configuration of surface of metallic zinc after corrosion in two media by SEM simultaneously.Although two kinds of electrochemical means results are variant, overall trend is consistent, all shows that this compound has good corrosion mitigating effect to metallic zinc; SEM test result is also consistent with electrochemistry experiment result simultaneously.
Embodiment 1
Experiment material is metallic zinc, formula one fucoidan compound is made into inhibiter, medium is the sea water solution taking from Huiquan Bay of Qingdao, just simply filtered by seawater, be immersed in by zinc products and add in the medium of inhibiter, temperature is 25 DEG C, pH=8-9, wherein medium consumption is 1L, and medium Chinese style one compound add-on is 60mg, and Immersion time is 30min.
Measured by electrochemistry experiment, comprise polarization curve and measure and electrochemical impedance, instrument is Solartron1287 and Solartron1260, and adopt traditional three-electrode system, experimental results shows: this compound is 66.7% to the inhibition efficiency of zinc.
Example 2
Experiment material is metallic zinc, formula one fucoidan compound is made into inhibiter, medium is the sea water solution taking from Huiquan Bay of Qingdao, just simply filtered by seawater, be immersed in by zinc products and add in the medium of inhibiter, temperature is 25 DEG C, pH=8-9, wherein medium consumption is 1L, and medium Chinese style one compound add-on is 80mg, and Immersion time is 30min.
Measured by electrochemistry experiment, comprise polarization curve and measure and electrochemical impedance, instrument is Solartron1287 and Solartron1260, and adopt traditional three-electrode system, experimental results shows: this compound is 80.5% to the inhibition efficiency of zinc.
Embodiment 3
Experiment material is metallic zinc, formula one fucoidan compound is made into inhibiter, medium is the sea water solution taking from Huiquan Bay of Qingdao, just simply filtered by seawater, be immersed in by zinc products and add in the medium of inhibiter, temperature is 25 DEG C, pH=8-9, wherein medium consumption is 1L, and medium Chinese style one compound add-on is 110mg, and Immersion time is 30min.
Measured by electrochemistry experiment, comprise polarization curve and measure and electrochemical impedance, instrument is Solartron1287 and Solartron1260, and adopt traditional three-electrode system, experimental results shows: this compound is 75.4% to the inhibition efficiency of zinc,
Embodiment 4
Experiment material is metallic zinc, formula one fucoidan compound is made into inhibiter, medium is the sea water solution taking from Huiquan Bay of Qingdao, just seawater is simply filtered, being immersed in by zinc products adds in the medium of inhibiter, solution temperature is 25 DEG C, pH=8-9, in order to verify the preservative effect of Fucoidan to zinc further, we adopt scanning electronic microscope (SEM) to test, the electrode surface of the new polishing of contrast, corrodes certain hour in media as well and in the medium adding inhibiter, corrodes the electrode surface of same time.Experiment condition: the electrode of 1. new polishing: polish step by step from 400-2000 with sand paper, 2. soak 7d in natural sea-water, 3. soak 7d in the seawater adding 110mgFucoidan.
Claims (4)
1. a high-efficient corrosion inhibitor, is characterized in that: high-efficient corrosion inhibitor is the sulfated polysaccharides Fucoidan shown in formula one,
2., by the application of high-efficient corrosion inhibitor according to claim 1, it is characterized in that: the sulfated polysaccharides Fucoidan shown in formula one is applied in zinc and metal products thereof as anticorrosion corrosion inhibitor.
3. by the application of high-efficient corrosion inhibitor according to claim 2, it is characterized in that: the anticorrosion corrosion inhibitor using formula one compound as seawater or concentration being zinc in the medium of 0.1%-5% (weight) sodium-chlor and metal products thereof.
4., by the application of high-efficient corrosion inhibitor according to claim 3, it is characterized in that: the amount of described often liter of medium or seawater Chinese style one compound is 20-150mg, solution temperature is 15-30 DEG C, pH is 8-9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201510578279.6A CN105154885B (en) | 2015-09-11 | 2015-09-11 | A kind of high-efficient corrosion inhibitor application |
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| CN201510578279.6A CN105154885B (en) | 2015-09-11 | 2015-09-11 | A kind of high-efficient corrosion inhibitor application |
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| CN105154885A true CN105154885A (en) | 2015-12-16 |
| CN105154885B CN105154885B (en) | 2018-06-19 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111575719A (en) * | 2020-06-29 | 2020-08-25 | 哈尔滨工业大学（威海） | Sea cucumber polysaccharide carbon steel corrosion inhibitor |
| CN114214629A (en) * | 2021-11-23 | 2022-03-22 | 大连理工常熟研究院有限公司 | Ecklonia polysaccharide and sodium molybdate based compound corrosion inhibitor and application thereof |
| CN116023920A (en) * | 2022-11-11 | 2023-04-28 | 天津大港油田滨港集团博弘石油化工有限公司 | Environment-friendly tetracyclic imidazoline solid corrosion inhibitor and preparation method thereof |
Citations (1)
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| CN101037483A (en) * | 2007-04-20 | 2007-09-19 | 中国科学院海洋研究所 | Method for extracting brown algae polysaccharide sulfated |
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Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101037483A (en) * | 2007-04-20 | 2007-09-19 | 中国科学院海洋研究所 | Method for extracting brown algae polysaccharide sulfated |
Non-Patent Citations (2)
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| 刘学虎: "用海藻制备"绿色"水处理剂的研究", 《中国优秀硕士学位论文全文数据库（硕士） 工程科技Ⅰ辑》 * |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111575719A (en) * | 2020-06-29 | 2020-08-25 | 哈尔滨工业大学（威海） | Sea cucumber polysaccharide carbon steel corrosion inhibitor |
| CN111575719B (en) * | 2020-06-29 | 2022-05-31 | 威海海洋生物医药产业技术研究院有限公司 | Sea cucumber polysaccharide carbon steel corrosion inhibitor |
| CN114214629A (en) * | 2021-11-23 | 2022-03-22 | 大连理工常熟研究院有限公司 | Ecklonia polysaccharide and sodium molybdate based compound corrosion inhibitor and application thereof |
| CN114214629B (en) * | 2021-11-23 | 2023-11-17 | 大连理工常熟研究院有限公司 | Compound corrosion inhibitor based on laminarin and sodium molybdate and application thereof |
| CN116023920A (en) * | 2022-11-11 | 2023-04-28 | 天津大港油田滨港集团博弘石油化工有限公司 | Environment-friendly tetracyclic imidazoline solid corrosion inhibitor and preparation method thereof |
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| CN105154885B (en) | 2018-06-19 |
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