CN105154885B - A kind of high-efficient corrosion inhibitor application - Google Patents
A kind of high-efficient corrosion inhibitor application Download PDFInfo
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- CN105154885B CN105154885B CN201510578279.6A CN201510578279A CN105154885B CN 105154885 B CN105154885 B CN 105154885B CN 201510578279 A CN201510578279 A CN 201510578279A CN 105154885 B CN105154885 B CN 105154885B
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Abstract
The present invention relates to the corrosion inhibitor of sea water of metallic zinc, specifically a kind of high-efficient corrosion inhibitor application.High-efficient corrosion inhibitor is the sulfated polysaccharides Fucoidan shown in formula one, and the sulfated polysaccharides Fucoidan shown in formula one is applied to be used as anticorrosion corrosion inhibitor in zinc and its metal product.Corrosion inhibiter using the present invention, dosage is few, environmentally protective, efficient, the continuous action time is long, can effectively inhibit the corrosion failure of metallic zinc, have broad application prospects.
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
With the arrival of numerical ocean model, the eye of development has gradually been invested ocean by the mankind.However seawater is strong because of it
Corrosivity brings many disasters and huge economic loss to the mankind.Therefore, the etching problem of metal material in the seawater is solved
It is extremely urgent.Corrosion inhibiter plays a part of becoming more and more important during exploitation and using of seawater with its unique superiority.
Zinc is a kind of important non-ferrous metal, and the 4th is occupied in global yield and consumption.Metallic zinc has appearance
Beautiful, heat conduction conducts electricity very well, and oxidation corrosion product is nontoxic, it is free from environmental pollution the features such as, and the often quilt in metal protection technique
As thermal spraying, hot-dip material, thus in many branchs of industry such as electronics, electric power, aviation, chemical industry, building materials, traffic and daily
In life, obtain and its be widely applied.However zinc is vulnerable to corrosion in acid or alkaline solution, and its oxidation film is also all
Acid or aqueous slkali are soluble in, thus solves the problems, such as the extremely urgent of zine corrosion.
At present, before having there is the corrosion inhibitor of sea water that many document reports cross metallic zinc, organic inhibitor to have very big application
Scape, but there are toxicity problems.
Invention content
The purpose of the present invention is to provide a kind of nontoxic, environmentally friendly, efficient high-efficient corrosion inhibitor applications.
To achieve the above object the present invention use technical solution for：
A kind of high-efficient corrosion inhibitor, high-efficient corrosion inhibitor are the sulfated polysaccharides Fucoidan shown in formula one,
The application of high-efficient corrosion inhibitor, the sulfated polysaccharides Fucoidan shown in formula one are applied to make in zinc and its metal product
For anticorrosion corrosion inhibitor.
Using one compound of formula as the zinc and its metal in the medium of seawater or a concentration of 0.1%-5% (weight) sodium chloride
The anticorrosion corrosion inhibitor of product.
The amount of one compound of every liter of medium or seawater Chinese style is 20-150mg, and solution medium temperature is 15-30 DEG C, pH
For 8-9.
Advantage for present invention：
It is 1. at low cost.Corrosion inhibiter active ingredient of the present invention is fucoidan, is from brown algae plant (such as kelp, kelp)
Extraction obtains, and raw material is easy to get, cheap, and purchase is convenient.
It is 2. environmentally protective.Corrosion inhibiter of the present invention and currently used inorganic inhibitor and traditional organic zinc inhibitor phase
Than, it is a kind of water-soluble fiber, and be applied to the pre- anti-cancer of pharmaceuticals industry, so be a kind of environmentally protective corrosion inhibiter.
3. high efficiency.The present invention, which adds a small amount of corrosion inhibiter, just can effectively inhibit destruction of the metallic zinc in Seawater,
And inhibition efficiency is up to 84% or so.
4. durability is good.Corrosion inhibiter of the present invention has excellent durability, can keep higher corrosion inhibition for a long time.
Description of the drawings：
Fig. 1 is experiment gained SEM figures, wherein, the electrode surface that (a) newly polishes；(b) 7d is impregnated in natural sea-water；(c) add
Enter and 7d is impregnated in the natural sea-water of 110mg corrosion inhibiter, temperature is maintained at 298K.It can be seen that from figure：With the electrode newly polished
Surface is compared, and severe pitting occurs for the electrode surface impregnated in the seawater, and after adding in corrosion inhibiter, this phenomenon obtains significantly
Control, so Fucoidan plays zinc good anti-corrosion effect in seawater.
Specific embodiment
The present invention is specifically：It weighs a certain amount of fucoidan compounds and is directly added into natural sea-water and fully dissolve, from
And anti-corrosion protection can be carried out to the zinc in Seawater and its metal product, wherein fucoidanization in every liter of Seawater
The amount of object is closed as 20-150mg, solution temperature is 15-30 DEG C, Immersion time for 20-30min (soaking time and metal material with
And the characteristic of corrosion inhibiter is related, as metal reaches with solution interface characteristic and stablizes the required time, when being impregnated needed for this experiment
Between for 30min or so), pH 8-9.
The present invention is using conventional electrochemistry experiment：Electrochemical impedance and potentiodynamic polarization determine fucoidan in sea
To the influence of the corrosion behavior of metallic zinc in aqueous medium, while pass through the surface of metallic zinc after corroding in SEM observation two medias
Form.Although two kinds of electrochemical means results are variant, overall trend is consistent, shows that this compound has metallic zinc well
Corrosion mitigating effect；SEM test results are also consistent with electrochemistry experiment result simultaneously.
Embodiment 1
Experiment material is metallic zinc, one fucoidan compounds of formula is made into corrosion inhibiter, medium is is derived from Huiquan Bay of Qingdao
Sea water solution, only seawater is simply filtered, by zinc products be immersed in add in corrosion inhibiter medium in, temperature 25
DEG C, pH=8-9, wherein medium consumption are 1L, and one compound addition of medium Chinese style is 60mg, Immersion time 30min.
It is measured by electrochemistry experiment, is measured including polarization curve and electrochemical impedance, instrument are
Solartron1287 and Solartron1260, using traditional three-electrode system, experimental results show：This compound pair
The inhibition efficiency of zinc is 66.7%.
Example 2
Experiment material is metallic zinc, one fucoidan compounds of formula is made into corrosion inhibiter, medium is is derived from Huiquan Bay of Qingdao
Sea water solution, only seawater is simply filtered, by zinc products be immersed in add in corrosion inhibiter medium in, temperature 25
DEG C, pH=8-9, wherein medium consumption are 1L, and one compound addition of medium Chinese style is 80mg, Immersion time 30min.
It is measured by electrochemistry experiment, is measured including polarization curve and electrochemical impedance, instrument are
Solartron1287 and Solartron1260, using traditional three-electrode system, experimental results show：This compound pair
The inhibition efficiency of zinc is 80.5%.
Embodiment 3
Experiment material is metallic zinc, one fucoidan compounds of formula is made into corrosion inhibiter, medium is is derived from Huiquan Bay of Qingdao
Sea water solution, only seawater is simply filtered, by zinc products be immersed in add in corrosion inhibiter medium in, temperature 25
DEG C, pH=8-9, wherein medium consumption are 1L, and one compound addition of medium Chinese style is 110mg, Immersion time 30min.
It is measured by electrochemistry experiment, is measured including polarization curve and electrochemical impedance, instrument are
Solartron1287 and Solartron1260, using traditional three-electrode system, experimental results show：This compound pair
The inhibition efficiency of zinc is 75.4%,
Embodiment 4
Experiment material is metallic zinc, one fucoidan compounds of formula is made into corrosion inhibiter, medium is is derived from Huiquan Bay of Qingdao
Sea water solution, only seawater is simply filtered, by zinc products be immersed in add in corrosion inhibiter medium in, solution temperature
It it is 25 DEG C, pH=8-9, in order to further verify anti-corrosion effects of the Fucoidan to zinc, we use scanning electron microscope
(SEM) it is tested, compares the electrode surface newly polished, corrode certain time in the medium and in the medium for adding in corrosion inhibiter
The electrode surface of middle corrosion same time.Experiment condition：1. the electrode newly polished：It is polished step by step from 400-2000 with sand paper, 2.
7d is impregnated in natural sea-water, 3. impregnates 7d in the seawater for adding in 110mg Fucoidan.
Claims (3)
1. a kind of application of high-efficient corrosion inhibitor, it is characterised in that：Sulfated polysaccharides Fucoidan is applied to zinc and its metal product
It is middle to be used as anticorrosion corrosion inhibitor；
The high-efficient corrosion inhibitor is the sulfated polysaccharides Fucoidan shown in formula one,
Formula one.
2. the application of high-efficient corrosion inhibitor as described in claim 1, it is characterised in that：Using one compound of formula as seawater or concentration
For 0.1 %-5%（Weight）The anticorrosion corrosion inhibitor of zinc and its metal product in the medium of sodium chloride.
3. the application of high-efficient corrosion inhibitor as described in claim 2, it is characterised in that：Every liter of medium or seawater Chinese style one are changed
The amount for closing object is 20-150 mg, and solution temperature is 15-30 DEG C, pH 8-9.
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| 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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| CN105154885A CN105154885A (en) | 2015-12-16 |
| CN105154885B true CN105154885B (en) | 2018-06-19 |
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| 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 |
| 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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| CN100540568C (en) * | 2007-04-20 | 2009-09-16 | 中国科学院海洋研究所 | A kind of method of extracting algal polysaccharide sulfate |
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