CN103510094A - Application of nicotinic acid as seawater rust inhibitor - Google Patents
Application of nicotinic acid as seawater rust inhibitor Download PDFInfo
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- CN103510094A CN103510094A CN201210204135.0A CN201210204135A CN103510094A CN 103510094 A CN103510094 A CN 103510094A CN 201210204135 A CN201210204135 A CN 201210204135A CN 103510094 A CN103510094 A CN 103510094A
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- rust inhibitor
- nicotinic acid
- seawater
- sodium chloride
- carbon steel
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Abstract
The invention relates to a rust inhibitor for, in concrete environment or corresponding alkaline conditions, corrosion inhibition of steel (carbon steel) in seawater or a sodium chloride solution, and particularly relates to the application of nicotinic acid as a seawater rust inhibitor in the concrete alkaline environment or corresponding alkaline conditions. The rust inhibitor is applied in the concrete alkaline environment or corresponding alkaline conditions for corrosion prevention of carbon steel materials and steel bar products thereof in the seawater or a sodium chloride medium, and the rust inhibitor of the invention is less in use amount, wide in source, non-toxic, green and environmentally friendly, high in efficiency, strong in continuous function ability, can effectively inhibit corrosion destruction of the carbon steel, and has substantial application values and broad market prospects.
Description
Technical field
The present invention relates to a kind of rust inhibitor in concrete environment or under corresponding alkaline condition, suppress steel (carbon steel) corrosion in seawater or sodium chloride solution, specifically a kind of nicotinic acid application under concrete alkalescence environment or corresponding alkaline condition as seawater rust inhibitor.
Background technology
Base oneself upon the needs of ecological environmental protection and the oceanic resources strategy of sustainable development; antirust for reinforced concrete not only requires to have the management using method of preservative effect and the safe ready of cheap cost, stability and high efficiency; and in application development process, to adapt to the requirement of Green Chemistry, reduce the carrying capacity of environment of product.
Traditional high-performance rebar concrete inorganic rust inhibitor product is as phosphoric acid salt, chromate and nitrous acid base class, in the PR ENV1504-9 bulletin of issuing in European Committee for Standardization, be listed in deadly poisonous compound, forbidden as concrete additive, using in Infrastructure and oceanographic engineering construction.Organic rust inhibitor of occupying at present principal market share is as amine, alcamines and fatty acid, according to the requirement of " China marine environmental quality communique " the sustainable recycle of oceanic resources, the problem that still exists antiseptic property index and zero pollutant row magnanimity to make overall plans, asepsis environment-protecting become thus rust inhibitor in Future Development without avoidable restriction bottleneck.
Adopt natural small molecules biomaterial or synthesising preparation as: VITAMIN and antibacterials etc. are as wide material sources, cheap, environmental friendliness and the avirulent novel corrosion inhibitor of human body is replaced to the Research Thinking of traditional rust inhibitor and achievement breaks through, some germ resistance alkaloids, Fungicide, farm crop hormone inhibitor plant extraction organic acid all studied proof can the corrosive medium generation competitive adsorption such as chlorion in metallic surface and acidity or neutral solution react, and existing work progressively therefrom filters out as compounds such as Touch-me-notAction Plant and Weibull, all have at saturated Ca (OH)
2in concrete simulation liquid high alkalinity environment, can keep compared with the feature of high resistant rust efficiency.
Three kinds of VITAMIN (B wherein
3, B
6, C) in acid and neutral solution, carbon steel is all had to good corrosion inhibition, Ferreira has studied the inhibition efficiency of xitix in pH=2-6 acidic solution first by polarization curve and alternating-current impedance; Goncalves and Ju research find that nicotinic acid is at the 0.5M of pH=2.7 Na
2sO
4in can significantly reduce the corrosion current of anodic reaction; Pang has studied the adsorption isotherm rule of pyridoxol in 1M HCl; Turn to concrete reinforcement corrosion-resistant field, to the further discussion of VITAMIN series compound anticorrosion performance and rule, certainly will also will become the academic focus of competitively chasing.
Summary of the invention
The object of the present invention is to provide a kind of natural, green non-poisonous, efficient effective constituent for the reinforcing steel bar corrosion inhibitor containing vitamin compound, in order to suppress carbon steel and the corrosion of reinforcement in concrete material product in seawater or sodium chloride medium thereof under alkaline condition.
For achieving the above object, the technical solution used in the present invention is:
A kind of nicotinic acid is the application under concrete alkalescence environment or corresponding alkaline condition as seawater rust inhibitor.
Wherein concrete alkalescence environment or corresponding alkaline condition refer to that pH value is for 9.5-13.5.
Described rust inhibitor is applied in concrete alkalescence environment or under corresponding alkaline condition, refers to that nicotinic acid acts in seawater or sodium chloride medium carbon steel material and reinforcing bar goods thereof are carried out to corrosion prevention.
In described seawater or sodium chloride medium, the concentration of nicotinic acid is 0.01-0.1g/L.
In described seawater or sodium chloride medium, the concentration of nicotinic acid is preferably 0.02-0.1g/L.
Described carbon steel material and reinforcing bar goods thereof are immersed in seawater or sodium chloride medium, and submergence temperature is 10-55 ℃.
In seawater or sodium chloride medium, the massfraction of sodium-chlor is 0.1%-5%,
The another name of effective constituent nicotinic acid is vitamins B
3or pyridine-3-carboxylic acid;
Product of the present invention can prevent carbon steel material and reinforcing bar goods thereof in concrete environment or corresponding alkaline condition under, the corrosion electrochemistry occurring when villaumite contact in seawater or sodium chloride solution reacts (local corrosion and general corrosion).
The invention has the beneficial effects as follows:
1. cost is low.The effective constituent of rust inhibitor of the present invention is nicotinic acid, and this compound and occurring in nature extensively exist, and in industrial a large amount of production, is widely used in health-care hospital, biotechnological formulation, and wide material sources are cheap.
2. green non-poisonous environmental protection.Rust inhibitor of the present invention is compared with amine rust inhibitor with the inorganic rust inhibitor that occupies in the market main share, there is the advantage that is exposed under high light or is easily degraded to non-toxic substance in soil and organism, can not bring load to environment, meet the trend of green rust inhibitor development.
3. suitability is strong.Rust inhibitor of the present invention applied widely all has good anticorrosion performance within the scope of different salinity, temperature and wider alkaline pH.
4. high efficiency.The present invention adds a small amount of rust inhibitor just can effectively suppress carbon steel material or the destruction of its corresponding reinforcing bar goods in corrosive medium.
5. good endurance.Inhibiter of the present invention has long-acting effect persistence, can in alkaline environment, keep for a long time higher resistance rust efficiency.
Embodiment
The present invention carries out zero-G test according to GB10124-88 " Uniform Corrosion Method of Laboratory Immersion Test method ", and adopts electrochemical AC impedance spectrum and two kinds of electrochemical methods of electrokinetic potential polarization to carry out anticorrosion performance sign.Although the resistance that three kinds of methods obtain rust efficiency has different, mainly to be average corrosion rate due to weight-loss method test, what electrochemical method was tested is the corrosion efficiency in transient process, but the general morphologictrend of the whole bag of tricks is consistent, can find out that this compound all has good anticorrosion performance under different salinity, rust inhibitor concentration, temperature, pH value condition.The experiment test method adopting comes from document: [1] W.Li, L.Hu, S.Zhang, B.Hou, Effects of two fungicides on the corrosion resistance of copper in 3.5% NaCl solution under various conditions[J], Corros.Sci.2011, 53:735-745[2] H.Tian, W.Li, B.Hou.Novel application of a hormone biosynthetic inhibitor for the corrosion resistance enhancement of copper in synthetic seawater[J] .Corros.Sci.2011, 53:3435 – 3445.
Embodiment 1
Condition: experiment material is carbon steel (Fe:99.5%, Mn:0.4-0.5%, C:0.1-0.2%), effectively rust inhibitor composition is nicotinic acid, medium is 3.5% sodium chloride solution, consumption 100L, and the effective content that adds nicotinic acid is 1g, temperature is 25 ℃, pH=9.5, and Immersion time is 60 days.
Test acquisition resistance rust efficiency is respectively by experiment, weightlessness 85.2%, and electrochemical impedance spectroscopy 87.7%, electrokinetic potential polarization curve 87.2%, shows that compound is the rust inhibitor that consumption is low, efficiency is high.
Embodiment 2
Condition: experiment material is carbon steel (Fe:99.5%, Mn:0.4-0.5%, C:0.1-0.2%), effectively rust inhibitor composition is nicotinic acid, medium is 3.5% sodium chloride solution, consumption 100L, and the effective content that adds nicotinic acid is 2g, temperature is 25 ℃, pH=9.5, and Immersion time is 60 days.
Test acquisition resistance rust efficiency is respectively by experiment, weightlessness 91.6%, and electrochemical impedance spectroscopy 92.4%, electrokinetic potential polarization curve 93.8%, shows that compound is the rust inhibitor that consumption is low, efficiency is high.
Embodiment 3
Condition: experiment material is carbon steel (Fe:99.5%, Mn:0.4-0.5%, C:0.1-0.2%), effectively rust inhibitor composition is nicotinic acid, medium is 3.5% sodium chloride solution, consumption 100L, and the effective content that adds nicotinic acid is 4.5g, temperature is 25 ℃, pH=9.5, and Immersion time is 60 days.
Test acquisition resistance rust efficiency is respectively by experiment, weightlessness 95.7%, and electrochemical impedance spectroscopy 95.5%, electrokinetic potential polarization curve 96.8%, shows that compound is the rust inhibitor that consumption is low, efficiency is high.
Embodiment 4
Condition: experiment material is carbon steel (Fe:99.5%, Mn:0.4-0.5%, C:0.1-0.2%), effectively rust inhibitor composition is nicotinic acid, medium is 3.5% sodium chloride solution, consumption 100L, and the effective content that adds nicotinic acid is 7g, temperature is 25 ℃, pH=9.5, and Immersion time is 60 days.
Test acquisition resistance rust efficiency is respectively by experiment, weightlessness 96.4%, and electrochemical impedance spectroscopy 97.2%, electrokinetic potential polarization curve 97.1%, shows that compound is the rust inhibitor that consumption is low, efficiency is high.
Embodiment 5
Condition: experiment material is carbon steel (Fe:99.5%, Mn:0.4-0.5%, C:0.1-0.2%), effectively rust inhibitor composition is nicotinic acid, medium is 3.5% sodium chloride solution, consumption 100L, and the effective content that adds nicotinic acid is 10g, temperature is 25 ℃, pH=9.5, and Immersion time is 60 days.
Test acquisition resistance rust efficiency is respectively by experiment, weightlessness 98.2%, and electrochemical impedance spectroscopy 98.6%, electrokinetic potential polarization curve 98.1%, shows that compound is the rust inhibitor that consumption is low, efficiency is high.
Embodiment 6
Condition: experiment material is carbon steel (Fe:99.5%, Mn:0.4-0.5%, C:0.1-0.2%), effect rust inhibitor composition is nicotinic acid, medium is 3.5% sodium chloride solution, consumption 100L, and the effective content that adds nicotinic acid is 1g, temperature is 25 ℃, pH=10.5, and Immersion time is 60 days.
Test acquisition resistance rust efficiency is respectively by experiment, weightlessness 86.4%, and electrochemical impedance spectroscopy 89.2%, electrokinetic potential polarization curve 88.5%, shows that compound is the rust inhibitor that consumption is low, efficiency is high.
Embodiment 7
Condition: experiment material is carbon steel (Fe:99.5%, Mn:0.4-0.5%, C:0.1-0.2%), effect rust inhibitor composition is nicotinic acid, medium is 3.5% sodium chloride solution, consumption 100L, and the effective content that adds nicotinic acid is 1g, temperature is 25 ℃, pH=12, and Immersion time is 60 days.
Test acquisition resistance rust efficiency is respectively by experiment, weightlessness 89.8%, and electrochemical impedance spectroscopy 92.4%, electrokinetic potential polarization curve 93.3%, shows that compound is the rust inhibitor that consumption is low, efficiency is high.
Embodiment 8
Condition: experiment material is carbon steel (Fe:99.5%, Mn:0.4-0.5%, C:0.1-0.2%), effect rust inhibitor composition is nicotinic acid, medium is 3.5% sodium chloride solution, consumption 100L, and the effective content that adds nicotinic acid is 1g, temperature is 25 ℃, pH=13.5, and Immersion time is 60 days.
Test acquisition resistance rust efficiency is respectively by experiment, weightlessness 92.2%, and electrochemical impedance spectroscopy 94.3%, electrokinetic potential polarization curve 94.8%, shows that compound is the rust inhibitor that consumption is low, efficiency is high.
Embodiment 9
Condition: experiment material is carbon steel (Fe:99.5%, Mn:0.4-0.5%, C:0.1-0.2%), effectively rust inhibitor composition is nicotinic acid, medium is 3.5% sodium chloride solution, consumption 100L, and the effective content that adds nicotinic acid is 2g, temperature is 35 ℃, pH=9.5, and Immersion time is 60 days.
Test acquisition resistance rust efficiency is respectively by experiment, weightlessness 88.3%, and electrochemical impedance spectroscopy 89.4%, electrokinetic potential polarization curve 89.9%, shows that compound is the rust inhibitor that consumption is low, efficiency is high.
Embodiment 10
Condition: experiment material is carbon steel (Fe:99.5%, Mn:0.4-0.5%, C:0.1-0.2%), effectively rust inhibitor composition is nicotinic acid, medium is 3.5% sodium chloride solution, consumption 100L, and the effective content that adds nicotinic acid is 2g, temperature is 45 ℃, pH=9.5, and Immersion time is 60 days.
Test acquisition resistance rust efficiency is respectively by experiment, weightlessness 86.2%, and electrochemical impedance spectroscopy 86.6%, electrokinetic potential polarization curve 86.2%, shows that compound is the rust inhibitor that consumption is low, efficiency is high.
Embodiment 11
Condition: experiment material is carbon steel (Fe:99.5%, Mn:0.4-0.5%, C:0.1-0.2%), effectively rust inhibitor composition is nicotinic acid, medium is 3.5% sodium chloride solution, consumption 100L, and the effective content that adds nicotinic acid is 2g, temperature is 55 ℃, pH=9.5, and Immersion time is 60 days.
Test acquisition resistance rust efficiency is respectively by experiment, weightlessness 84.0%, and electrochemical impedance spectroscopy 86.1%, electrokinetic potential polarization curve 85.4%, shows that compound is the rust inhibitor that consumption is low, efficiency is high.
Claims (6)
1. nicotinic acid application under concrete alkalescence environment or corresponding alkaline condition as seawater rust inhibitor.
2. nicotinic acid application under concrete alkalescence environment or corresponding alkaline condition as seawater rust inhibitor according to claim 1, is characterized in that: concrete alkalescence environment or corresponding alkaline condition refer to that pH value is for 9.5-13.5.
3. nicotinic acid application under concrete alkalescence environment or corresponding alkaline condition as seawater rust inhibitor according to claim 1, it is characterized in that: described rust inhibitor is applied in concrete alkalescence environment or under corresponding alkaline condition, referring to that nicotinic acid acts in seawater or sodium chloride medium carries out corrosion prevention to carbon steel material and reinforcing bar goods thereof.
4. nicotinic acid application under concrete alkalescence environment or corresponding alkaline condition as seawater rust inhibitor according to claim 3, is characterized in that: in described seawater or sodium chloride medium, the concentration of nicotinic acid is 0.01-0.1g/L.
5. nicotinic acid application under concrete alkalescence environment or corresponding alkaline condition as seawater rust inhibitor according to claim 4, is characterized in that: in described seawater or sodium chloride medium, the concentration of nicotinic acid is preferably 0.02-0.1g/L.
6. nicotinic acid application under concrete alkalescence environment or corresponding alkaline condition as seawater rust inhibitor according to claim 3, is characterized in that: described carbon steel material and reinforcing bar goods thereof are immersed in seawater or sodium chloride medium, and submergence temperature is 10-55 ℃.
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| CN201210204135.0A CN103510094A (en) | 2012-06-20 | 2012-06-20 | Application of nicotinic acid as seawater rust inhibitor |
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| CN201210204135.0A CN103510094A (en) | 2012-06-20 | 2012-06-20 | Application of nicotinic acid as seawater rust inhibitor |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108341809A (en) * | 2017-12-11 | 2018-07-31 | 内江师范学院 | A kind of steel corrosion inhibitor and its preparation method and application |
| CN108947412A (en) * | 2018-09-05 | 2018-12-07 | 河海大学 | A kind of ecology resistance anti-corrosion maritime concrete of rust type seawater sea sand and preparation method thereof |
| US11180856B1 (en) | 2020-06-18 | 2021-11-23 | King Fahd University Of Petroleum And Minerals | Corrosion inhibitor composition and methods of inhibiting corrosion |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61153290A (en) * | 1984-12-26 | 1986-07-11 | Toshiba Corp | Corrosion inhibitor for metal |
| CN102108513A (en) * | 2010-12-27 | 2011-06-29 | 中国人民解放军防化指挥工程学院 | Compound corrosion inhibitor for corrosion medium and preparation method thereof |
-
2012
- 2012-06-20 CN CN201210204135.0A patent/CN103510094A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61153290A (en) * | 1984-12-26 | 1986-07-11 | Toshiba Corp | Corrosion inhibitor for metal |
| CN102108513A (en) * | 2010-12-27 | 2011-06-29 | 中国人民解放军防化指挥工程学院 | Compound corrosion inhibitor for corrosion medium and preparation method thereof |
Non-Patent Citations (1)
| Title |
|---|
| 田惠文等: "烟酸在铁钝化膜层表面的吸附机理", 《物理化学学报》 * |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108341809A (en) * | 2017-12-11 | 2018-07-31 | 内江师范学院 | A kind of steel corrosion inhibitor and its preparation method and application |
| CN108341809B (en) * | 2017-12-11 | 2020-12-22 | 内江师范学院 | Steel rust inhibitor and preparation method and application thereof |
| CN108947412A (en) * | 2018-09-05 | 2018-12-07 | 河海大学 | A kind of ecology resistance anti-corrosion maritime concrete of rust type seawater sea sand and preparation method thereof |
| CN108947412B (en) * | 2018-09-05 | 2021-07-13 | 河海大学 | Ecological rust-resistant seawater sea sand corrosion-resistant marine concrete |
| US11180856B1 (en) | 2020-06-18 | 2021-11-23 | King Fahd University Of Petroleum And Minerals | Corrosion inhibitor composition and methods of inhibiting corrosion |
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Application publication date: 20140115 |