CN101139717A - Method for preparing vapour phase inhibitor - Google Patents
Method for preparing vapour phase inhibitor Download PDFInfo
- Publication number
- CN101139717A CN101139717A CNA2007101573354A CN200710157335A CN101139717A CN 101139717 A CN101139717 A CN 101139717A CN A2007101573354 A CNA2007101573354 A CN A2007101573354A CN 200710157335 A CN200710157335 A CN 200710157335A CN 101139717 A CN101139717 A CN 101139717A
- Authority
- CN
- China
- Prior art keywords
- vapour
- corrosion
- phase inhibitor
- amine
- inhibitor
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Landscapes
- Preventing Corrosion Or Incrustation Of Metals (AREA)
Abstract
The invention discloses a preparation method for a gaseous inhibitor with the general formula of R2N(CH2)n plus 1CH(OH)NCH2R2 (n is equal to 0 to 3). Tertiary amine and benzonic acid and the derivant are mixed under 50 to 70 DEG C; the reacted product is mixed with de-ionized water in proportion (10 to 20 per cent):(90 to 80 per cent); then the pH value is adjusted between 8 and 9 with NaOH. The tertiary amine compound can be aromatic amine, fatty amine and heterocyclic ring amine or one or a combination of two from them; the benzonic acid can be a derivant of benzonic acid or phthalic acid, or fatty carboxylic acid compound, or a mixture of one or two of above components.
Description
Technical field
The present invention relates to a kind of tertiary amines vapour-phase inhibitor preparation method of (Volatile Corrosion Inhibitor is called for short VCI), it is used to protect common metal such as iron, zinc, tin, aluminium, copper and their alloy to avoid atomospheric corrosion.
Background technology
It is the problem that all faces in each national industrial production that metal suffers atomospheric corrosion, and according to document [1] statistics, China accounts for 2.5% of national economy because of the loss that atomospheric corrosion caused every year, causes enormous economic loss and harm.The environmental pollution that corrosion causes has destroyed the eubiosis, the crisis human health.Research mechanism of corrosion and safeguard procedures have not been simple technical problems, but are related to resources conseravtion, save energy, protection environment, assurance ordinary production and a series of important social and economic problems such as personnel safety, development new technology.For slowing down corrosion of metal, people adopt many methods to protect metal, wherein adding vapour-phase inhibitor (Volatile Corrosion Inhibitor is called for short VCI) is exactly not only an economy but also practical method, has become a kind of important protection against corrosion means [2-4].The general molecular weight of vapour-phase inhibitor is less, can volatilize the particle with corrosion inhibition automatically at normal temperatures, and its particle can spread, be dissolved in the thin electrolyte of metallic surface, generates the protectiveness ion, suppresses corrosion process, prevents corrosion.Because the volatility of vapour-phase inhibitor particle is higher, as long as can arriving the metallic surface, its steam just can make metal obtain protecting, thus no matter be the surface of metal products, or inner chamber, groove even position, slit all can be protected [5].Simultaneously, can also keep the original mechanical property of metallic substance constant, protected metal surface before use usually need be through not handling.So vapour-phase inhibitor is more more extensive than using coating, pad and corrosion-proof paint to use.At present, the vapour-phase inhibitor technology has been widely used in fields such as machinery, electronics, instrument, automobile and military project, becomes one of main method that prevents atomospheric corrosion.
For many years, being used for the antirust vapour-phase inhibitor principal constituent of iron and steel or other mental package and all being with dicyclohexyl amine nitrite, carbonic acid dicyclohexyl amine, 2-mercaptobenzothiazole, benzotriazole and urotropine etc. is inhibiter, though these vapour-phase inhibitors have excellent corrosion inhibition.Yet over past ten years, because the toxicity problem of these compounds, its application be very limited [6].For example, America NI OSH in 1976 checks out that nitrite and organic amine salt reaction generate carcinogens---nitrosamine, and the nitrites inhibiter is disabled.Current, people are devoted to mainly that toxicity is low, cost is low and the high inhibiter R and D of corrosion mitigating effect, but also face a lot of problems now, or the corrosion inhibition of inhibiter does not pass a test, or the inhibiter cost is higher, or inhibiter toxicity is higher.Current, the research direction of vapour-phase inhibitor mainly concentrates on novel, the high-efficiency low-toxicity type inhibiter kind that ecotope is not constituted destruction.
Summary of the invention
The purpose of this invention is to provide a kind of preparation method who does not contain the vapour-phase inhibitor of nitrite, have the rustless property excellence concurrently, the low and low characteristic of toxicity of raw materials cost by product provided by the invention.
The present invention mainly is achieved by the synthetic a series of tertiary amine compounds of alkylated reaction: be R with the general formula
2N (CH
2)
N+1CH (OH) CH
2NR
2(n=0-3) tertiary amine and phenylformic acid with mix by a certain percentage, at 50～70 ℃ of reaction 2h down, reaction product is carried out recrystallization in ethanol.Then reactant and deionized water are pressed (10～20%): the mixed of (90～80%), with NaOH the pH value is adjusted between 8～9 then, promptly constitute vapour-phase inhibitor.
Above-mentioned tertiary amine compounds can be aromatic amine, aliphatic amide or heterocyclic amine or one or more mixture wherein, the phenylformic acid that is adopted can be the derivative of benzoic derivative, benzene first diacid, can be the fats carboxylic acid cpd also, or the mixture of taking to contain above-mentioned one or more components be formed.
The invention has the beneficial effects as follows: the synthetic vapour-phase inhibitor has bigger molecular weight, be different from traditional low molecular weight amine and its esters vapour-phase inhibitor, have bigger bridging effect, specific molecule structure and lower toxicity, be applicable to non-ferrous metal and the good vapour-phase inhibitor of ferrous metal system performance.
Description of drawings
The present invention is further illustrated (being example with the brass material) below in conjunction with the drawings and specific embodiments.
Fig. 1 is that the polarization curve of synthetic gas phase corrosion inhibitor of the present invention in simulation atomospheric corrosion water measured.
Fig. 2 is the ac impedance measurement of synthetic gas phase corrosion inhibitor of the present invention in simulation atomospheric corrosion water.
Fig. 3 and Fig. 4 are that brass of the present invention is adding vapour-phase inhibitor volatile rust prevention aptitude tests front and rear surfaces sem analysis.
Embodiment
Below in conjunction with example in detail the present invention is described in detail:
Embodiment one
The tertiary amine of 0.1mol and the tolyl acid of 0.11mol are mixed under 50～70 ℃, behind the reaction 2h, behind the recrystallization a certain amount of NaOH is added in the mixture, add the deionized water of 70ml again, adjust the pH value and be adjusted to 8～9.
Embodiment two
The tertiary amine of 0.21mol and the benzene first diacid of 0.20mol are mixed under 50～70 ℃, behind the reaction 4h, behind the recrystallization a certain amount of NaOH is added in the mixture, add the deionized water of 120ml again, adjust the pH value and be adjusted to 8～9.
Embodiment three
The tertiary amine of 0.1mol, the phenylformic acid of 0.05mol and the benzene first diacid of 0.06mol are mixed under 50～70 ℃, behind the reaction 2.5h, behind the recrystallization a certain amount of NaOH is added in the mixture, add the deionized water of 70ml again, adjust the pH value and be adjusted to 8～9.
Embodiment four
Mix under 50～70 ℃ in the phenylformic acid of the two kinds of tertiary amine compounds of 0.05mol and 0.11mol respectively, behind the reaction 3h, behind the recrystallization a certain amount of NaOH is added in the mixture, add the deionized water of 60ml again, adjust the pH value and be adjusted to 8～9.
Implement comparative example one:
The vapour-phase inhibitor that adds different amounts in simulation atomospheric corrosion water carries out electrochemical tests and measures.During experiment working electrode is stablized for some time in corrosion electrolytic solution, begin to test polarization curve after waiting to stablize.The polarization curve measurement is shown in Fig. 1.Along with the increase of density of corrosion inhibitor, the cathode and anode polarization curve all is moved to the left, and makes corrosion electric current density reduce gradually.This shows that the synthetic gas phase corrosion inhibitor all has resistance inhibitor action to the anode dissolution and the negative electrode oxygen depolarization process of brass.
Implement comparative example two:
The vapour-phase inhibitor that adds different amounts in simulation atomospheric corrosion water carries out ac impedance measurement, and the impedance measurement frequency is 10kHz～10mHz, ac-excited signal amplitude ± 10mV.Impedance measurement is shown in Fig. 2.As can be seen from Figure, the impedance spectrum of brass in containing vapour-phase inhibitor electrolytic solution is the capacitive reactance arc of a sinking, and this capacitive reactance arc is out of shape to some extent in low-frequency range, and the capacitive reactance arc dia increases with the increase of density of corrosion inhibitor.After vapour-phase inhibitor was added in this explanation, the reaction resistance of brass surfaces increased, and the difficulty that corrosion reaction takes place is increased.
Implement comparative example three:
The experiment of volatile rust prevention ability is a direct measuring method of estimating vapour-phase inhibitor rustless property under static wet environment.Visual inspection experiment finishes back brass surfaces status discovery, add vapour-phase inhibitor after, the brass surfaces light does not have the sign (Fig. 4) of local corrosion.And in the blank medium, brass surfaces presents typical local corrosion feature (Fig. 3).This explanation synthetic vapour-phase inhibitor can effectively suppress the corrosion of brass in atmosphere.
From above enforcement comparative example as seen, the inventive method institute synthetic vapour-phase inhibitor has good corrosion inhibiting effect to metal, its interfacial adsorption rete densification, and anti-corrosion capability is stronger.
Claims (3)
1. the preparation method of a vapour-phase inhibitor is characterized in that, with general formula R
2N (CH
2)
N+1CH (OH) CH
2NR
2(n=0-3) tertiary amine mixes under 50～70 ℃ with phenylformic acid and derivative thereof, and reactant and deionized water by 10～20%: 90～80% mixed, are adjusted to the pH value between 8～9 with NaOH then.
2. the preparation method of a kind of vapour-phase inhibitor according to claim 1 is characterized in that, described tertiary amine is aromatic amine, aliphatic amide or heterocyclic amine or one or more mixture wherein.
3. the preparation method of a kind of vapour-phase inhibitor according to claim 1, it is characterized in that, described phenylformic acid can be the derivative of benzoic derivative or benzene first diacid, also can be fats carboxylic acid cpd or the mixture composition of taking to contain above-mentioned one or more components.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007101573354A CN101139717A (en) | 2007-09-30 | 2007-09-30 | Method for preparing vapour phase inhibitor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007101573354A CN101139717A (en) | 2007-09-30 | 2007-09-30 | Method for preparing vapour phase inhibitor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101139717A true CN101139717A (en) | 2008-03-12 |
Family
ID=39191821
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2007101573354A Pending CN101139717A (en) | 2007-09-30 | 2007-09-30 | Method for preparing vapour phase inhibitor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101139717A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103556155A (en) * | 2013-10-30 | 2014-02-05 | 无锡市威海达机械制造有限公司 | High-elasticity metal vapor-phase anti-rust film |
| CN103602989A (en) * | 2013-10-30 | 2014-02-26 | 无锡市威海达机械制造有限公司 | Metal gas-phase antirust film |
| CN104109099A (en) * | 2014-05-20 | 2014-10-22 | 烟台恒迪克能源科技有限公司 | Synthesis method of hydroxyalkyl tertiary ammonium beta-hydroxyalkyldienediaminocaproate |
| CN106086898A (en) * | 2016-08-20 | 2016-11-09 | 哈尔滨锅炉厂有限责任公司 | Volatile rust prevention powder of carbon steel and low alloy steel and preparation method thereof |
| CN110499512A (en) * | 2019-09-11 | 2019-11-26 | 王二坡 | One kind being applicable in environmentally friendly gaseous recombination corrosion inhibitor of more metals and preparation method thereof |
-
2007
- 2007-09-30 CN CNA2007101573354A patent/CN101139717A/en active Pending
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103556155A (en) * | 2013-10-30 | 2014-02-05 | 无锡市威海达机械制造有限公司 | High-elasticity metal vapor-phase anti-rust film |
| CN103602989A (en) * | 2013-10-30 | 2014-02-26 | 无锡市威海达机械制造有限公司 | Metal gas-phase antirust film |
| CN104109099A (en) * | 2014-05-20 | 2014-10-22 | 烟台恒迪克能源科技有限公司 | Synthesis method of hydroxyalkyl tertiary ammonium beta-hydroxyalkyldienediaminocaproate |
| CN104109099B (en) * | 2014-05-20 | 2017-01-11 | 山东蓝盟防腐科技股份有限公司 | Synthesis method of hydroxyalkyl tertiary ammonium beta-hydroxyalkyldienediaminocaproate |
| CN106086898A (en) * | 2016-08-20 | 2016-11-09 | 哈尔滨锅炉厂有限责任公司 | Volatile rust prevention powder of carbon steel and low alloy steel and preparation method thereof |
| CN106086898B (en) * | 2016-08-20 | 2018-06-05 | 哈尔滨锅炉厂有限责任公司 | Volatile rust prevention powder of carbon steel and low alloy steel and preparation method thereof |
| CN110499512A (en) * | 2019-09-11 | 2019-11-26 | 王二坡 | One kind being applicable in environmentally friendly gaseous recombination corrosion inhibitor of more metals and preparation method thereof |
| CN110499512B (en) * | 2019-09-11 | 2021-08-27 | 王二坡 | Environment-friendly gas-phase composite rust inhibitor suitable for multiple metals and preparation method thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Hegazy et al. | Novel cationic gemini surfactants as corrosion inhibitors for carbon steel pipelines | |
| Atta et al. | Corrosion inhibition, hydrogen evolution and antibacterial properties of newly synthesized organic inhibitors on 316L stainless steel alloy in acid medium | |
| Shukla et al. | Triazines: Efficient corrosion inhibitors for mild steel in hydrochloric acid solution | |
| Sherif et al. | Corrosion of magnesium/manganese alloy in chloride solutions and its inhibition by 5-(3-aminophenyl)-tetrazole | |
| Abdallah et al. | Synthesis of some aromatic nitro compounds and its applications as inhibitors for corrosion of carbon steel in hydrochloric acid solution | |
| CN101139717A (en) | Method for preparing vapour phase inhibitor | |
| Mobin et al. | Inhibition of mild steel corrosion using l-histidine and synergistic surfactants additives | |
| Shah et al. | Schiff bases of triethylenetetramine as corrosion inhibitors of Zinc in Hydrochloric acid | |
| Liu et al. | Adsorption orientation of sodium of polyaspartic acid effect on anodic films formed on magnesium alloy | |
| Fouda et al. | Benzothiazole derivatives as corrosion inhibitors for carbon steel in 1 M phosphoric acid (H3PO4) solutions | |
| Arukalam et al. | Adsorption and inhibitive properties of hydroxypropyl methylcellulose on the acid corrosion of mild steel | |
| Singh et al. | Pipali (Piper longum) and Brahmi (Bacopa monnieri) extracts as green corrosion inhibitor for aluminum in NaOH solution | |
| Sanatkumar et al. | The corrosion inhibition of maraging steel under weld aged condition by 1 (2 E)-1-(4-aminophenyl)-3-(2-thienyl) prop-2-en-1-one in 1.5 M hydrochloric acid medium | |
| Rbaa et al. | Novel 8-Hydroxyqionoline Derivatives as Effective Corrosion Inhibitors for Mild Steel in HCl Solution: Synthesis, Characterization, Gravimetric, Electrochemical, Surface Morphological and UV-Visible Spectrometry | |
| Fengling et al. | Triazole derivatives as corrosion inhibitors for mild steel in hydrochloric acid solution | |
| Juan et al. | The Preparation of a Novel Corrosion Inhibitor and Its Corrosion Inhibition Behavior on 2024 Al‐Cu‐Mg Alloy in Acid Solution | |
| Liu et al. | THE INHIBITORY EFFECT OF SOME BIPYRIDINE DERIVATIVES ON THE CORROSION BEHAVIOR OF N 80 CARBON STEEL IN SULPHURIC ACID SOLUTIONS | |
| Ostanina et al. | Magnesium alloys spontaneous dissolution features under external anodic polarization in presence of inhibitors | |
| CN110644007B (en) | Preparation method and application of 2, 3-thiophene dimethyl acetal 2-aminofluorene Schiff base corrosion inhibitor | |
| CN110592595A (en) | Preparation method and application of 2, 5-thiophene dimethyl acetal 2-aminofluorene Schiff base corrosion inhibitor | |
| Galai et al. | The effect of temperature on the inhibition of acid hydrochloric corrosion of carbon steel by hexa propylene glycol cyclotriphosphazene | |
| CN111690936A (en) | Compound corrosion inhibitor suitable for AZ91D magnesium alloy in neutral saline water medium and preparation method thereof | |
| Lin et al. | Corrosion inhibition effect of phosphate on fine-grain high-strength reinforcement in simulated concrete pore solutions with carbonation and chloride-intrusion | |
| Banerjee et al. | An electrochemical and quantum chemical investigation of some corrosion inhibitors on aluminium alloy in 0.6 M aqueous sodium chloride solution | |
| CN115466960B (en) | Preparation method and application of benzothiazole group-containing modified polyaspartic acid fluorescent corrosion inhibitor |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C12 | Rejection of a patent application after its publication | ||
| RJ01 | Rejection of invention patent application after publication |
Open date: 20080312 |