CN107675182A - A kind of green compound corrosion inhibitor and its application - Google Patents
A kind of green compound corrosion inhibitor and its application Download PDFInfo
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- CN107675182A CN107675182A CN201711007639.2A CN201711007639A CN107675182A CN 107675182 A CN107675182 A CN 107675182A CN 201711007639 A CN201711007639 A CN 201711007639A CN 107675182 A CN107675182 A CN 107675182A
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23F—NON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM SURFACE; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL; MULTI-STEP PROCESSES FOR SURFACE TREATMENT OF METALLIC MATERIAL INVOLVING AT LEAST ONE PROCESS PROVIDED FOR IN CLASS C23 AND AT LEAST ONE PROCESS COVERED BY SUBCLASS C21D OR C22F OR CLASS C25
- C23F11/00—Inhibiting corrosion of metallic material by applying inhibitors to the surface in danger of corrosion or adding them to the corrosive agent
- C23F11/04—Inhibiting corrosion of metallic material by applying inhibitors to the surface in danger of corrosion or adding them to the corrosive agent in markedly acid liquids
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Abstract
The invention discloses a kind of green compound corrosion inhibitor and its application, the corrosion inhibiter is formed by vanillic aldehyde solution and cinnamic acid solution compounding, the concentration of vanillic aldehyde is 0.005mol/L~0.020mol/L in gained corrosion inhibiter after compounding, the concentration of cinnamic acid is 0.005mol/L~0.020mol/L, and the corrosion inhibiter effectively slows down the corrosion of copper, N80 steel in hydrochloric acid medium.The beneficial effects of the invention are as follows：(1) all harmless vanillic aldehyde of human body and environment and cinnamic acid will be compounded, effectively reduces harm of harmful corrosion inhibiter to the mankind and ecology, be a kind of environmentally friendly, green compound corrosion inhibitor；(2) after vanillic aldehyde compounds with both cinnamic acids, one layer of big adsorbed film of good compactness, coverage is formd in metal surface, effectively prevent corrosion of the corrosive ions to copper and N80 steel surfaces, reduce corrosion of metal speed, the extent of corrosion of pipeline, equipment etc. is reduced, reduces the economic loss caused by corrosion；(3) preparation method is simple, and cost is low, green, is easy to industrialized production.
Description
Technical field
The invention belongs to industrial inhibiter technology field, is related to a kind of green compound corrosion inhibitor and its application.
Background technology
With the fast development of national economy, the economic benefit in petroleum industry field steps up, but simultaneously in the field
The problems such as pipe corrosion caused by the harsh environments such as strong acid and strong base even fails also becomes increasingly conspicuous, and only China National Petroleum is public
Department was lost every year on average up to 1,400,000,000 yuan between 1996~1999 years caused by corrosion.N80 steel as one kind be commonly used in oil and
Petroleum casing pipe material in the work of natural gas production pipeline, etching problem is more common, and corrodes the not exclusively failure triggered,
Major accident caused by after even more failing.Copper finds earliest metal as human society, because of its excellent intensity, well
The features such as machining property and weldability, obtain widely should in chemical industry, military affairs and the field such as civilian for a long time
With, but during use, similar harsh conditions environment also results in metallic copper and is easy to be corroded, and then gives chemical industry
Production brings some unnecessary heavy losses.In order to solve this problem, sight has been put into just by many researchers
On prompt, efficient corrosion inhibiter.For corrosion inhibiter such as imidazoles woods compound, pyrimidine derivatives etc. of N80 steel corrosions, corrode for Cu
Corrosion inhibiter such as thiocarbamide and hexa etc., although the synthesis of these corrosion inhibiter is simple, inhibition efficiency is high, they should
With influence that all can be certain to environment or health generation.Contain N atoms in imidazoles woods compound, can be produced after use poisonous
Gas causes environmental pollution；Pyrimidine derivatives are inflammable, are dissolved in water, have severe toxicity, certain damage can be caused after skin, eye contact
Wound, environment and water pollution etc. can be caused by being discharged into air.Therefore, a kind of new, environment-friendly and green metal inhibitor is found
It is very urgent to suppress corrosion of metal.
The content of the invention
For above-mentioned technical problem present in prior art, it is an object of the invention to provide a kind of green compounding inhibition
Agent, the corrosion inhibiter is efficient, green, effectively slows down copper, N80 steel corrodes in hydrochloric acid medium.
The technical solution adopted in the present invention is a kind of green compound corrosion inhibitor, by vanillic aldehyde solution and cinnamic acid solution
Compounding forms.
Further, a kind of green compound corrosion inhibitor, the concentration of vanillic aldehyde is 0.005mol/ in gained corrosion inhibiter after compounding
L~0.020mol/L, the concentration of cinnamic acid is 0.005mol/L~0.020mol/L.
Further, a kind of green compound corrosion inhibitor, the concentration of vanillic aldehyde is 0.010mol/ in gained corrosion inhibiter after compounding
L, the concentration of cinnamic acid is 0.020mol/L.
Further, a kind of green compound corrosion inhibitor, the concentration of vanillic aldehyde is 0.010mol/ in gained corrosion inhibiter after compounding
L, the concentration of cinnamic acid is 0.015mol/L.
Further, a kind of green compound corrosion inhibitor, the solvent diluted used in vanillic aldehyde is distilled water, dilution cinnamic acid institute
Solvent is distilled water.
Further, a kind of green compound corrosion inhibitor, hydrochloric acid medium are the hydrochloric acid solution that mass fraction is 15%.
A kind of green compound corrosion inhibitor is in the application for effectively slowing down copper, N80 steel corrodes in hydrochloric acid medium.
Further, a kind of green compound corrosion inhibitor is in the application for effectively slowing down copper, N80 steel corrodes in hydrochloric acid medium,
The application is specifically what is followed the steps below：
(1) metallic copper, N80 steel are handled：It is Ф that copper sheet and N80 steel discs are processed into specification using wire cutting method
14.5mm × 3mm disk；Sample test face is polished step by step with 400#, 800#, 1000# and 1200# abrasive paper for metallograph, then used
Polishing machine is polished；Cleaned successively with acetone, ethanol and redistilled water, it is standby after drying；
(2) thermostat water bath is opened, bath temperature is set to 298K, the container equipped with corrosion inhibiter is put into thermostat water bath
In；
(3) metallic copper, N80 steel samples are respectively put into corrosion inhibiter, are taken out after soaking 12h-18h, be subsequently placed in hydrochloric acid
In solution.
The beneficial effects of the invention are as follows：(1) vanillic aldehyde is a kind of aldehydes organic matter, is largely present in beet, vanilla bean etc.
In plant, it is easy to extract, environmental protection, health, cinnamic acid is also a kind of aldehydes organic matter, is extracted from animals and plants, safe, green,
The present invention will compound to the harmless vanillic aldehyde of human body and environment and cinnamic acid, effectively reduce harmful corrosion inhibiter to the mankind
It is a kind of environmentally friendly, green compound corrosion inhibitor with the harm of ecology；(2) it is demonstrated experimentally that vanillic aldehyde compounds with both cinnamic acids
Afterwards, one layer of big adsorbed film of good compactness, coverage is formd in metal surface, effectively prevent corrosive ions to copper and
The corrosion of N80 steel surfaces, corrosion of metal speed is reduced, reduce the extent of corrosion of pipeline, equipment etc., reduced because corrosion is made
Into economic loss；(3) compound corrosion inhibitor preparation method of the invention is simple, and cost is low, green, is easy to industrial metaplasia
Production.
Brief description of the drawings
When Fig. 1 is 25 DEG C, Tafel polarization curve of the copper in the vanillic aldehyde corrosion inhibiter of various concentrations；
When Fig. 2 is 25 DEG C, Nyquist curve of the copper in the vanillic aldehyde corrosion inhibiter of various concentrations；
When Fig. 3 is 25 DEG C, Tafel polarization curve of the copper in the cinnamic acid corrosion inhibiter of various concentrations；
When Fig. 4 is 25 DEG C, Nyquist curve of the copper in the cinnamic acid corrosion inhibiter of various concentrations；
When Fig. 5 is 25 DEG C, Tafel polarization curve of the copper in the compound corrosion inhibitor of various concentrations；
When Fig. 6 is 25 DEG C, Nyquist curve of the copper in the compound corrosion inhibitor of various concentrations；
When Fig. 7 is 25 DEG C, Tafel polarization curve of the N80 steel in the vanillic aldehyde corrosion inhibiter of various concentrations；
When Fig. 8 is 25 DEG C, Nyquist curve of the N80 steel in the vanillic aldehyde corrosion inhibiter of various concentrations；
When Fig. 9 is 25 DEG C, Tafel polarization curve of the N80 steel in the cinnamic acid corrosion inhibiter of various concentrations；
When Figure 10 is 25 DEG C, Nyquist curve of the N80 steel in the cinnamic acid corrosion inhibiter of various concentrations；
When Figure 11 is 25 DEG C, Tafel polarization curve of the N80 steel in the compound corrosion inhibitor of various concentrations；
When Figure 12 is 25 DEG C, Nyquist curve of the N80 steel in the compound corrosion inhibitor of various concentrations；
Figure 13 is equivalent circuit diagram (R used when impedance curve is fittedsRepresent etchant solution resistance, CfRepresent metal surface
Membrane capacitance, RfRepresent film resistance, CdlRepresent electric double layer capacitance, RctRepresent charge transfer resistance).
Embodiment
Technical scheme is described further with reference to specific embodiment, it is to be understood that the guarantor of the present invention
Shield scope is not limited by specific embodiment.
Embodiment 1
First, vanillic aldehyde solution is prepared
Vanillic aldehyde is Chinese medicines group chemical reagent, analyzes pure, white powder.Weighed respectively with assay balance 0.038g,
0.076g, 0.114g and 0.152g (error range is ± 0.0002g) vanillic aldehyde powder are simultaneously dissolved in 50mL distilled water respectively
In, obtain the vanillic aldehyde solution that concentration is respectively 0.005mol/L, 0.010mol/L, 0.015mol/L and 0.020mol/L.
Vanillic aldehyde is a kind of aldehydes organic matter, is largely present in the plants such as beet, vanilla bean, is easy to extract, environmental protection,
Health, belong to organic inhibitor, it is all harmless to human body and environment.
2nd, cinnamic acid solution is prepared
Cinnamic acid is Chinese medicines group chemical reagent, analyzes pure, buff oily liquids.Weigh four parts successively with graduated cylinder
0.5mL solution, is diluted to 755mL, 378mL, 252mL and 189mL respectively, obtain concentration be respectively 0.005mol/L,
0.010mol/L, 0.015mol/L and 0.020mol/L cinnamic acid solution.
Cinnamic acid is a kind of aldehydes organic matter, is extracted from animals and plants, safe and environment-friendly, green, belongs to organic inhibitor, right
Human body and environment are all harmless.
3rd, compound
Appropriate certain density vanillic aldehyde solution and appropriate certain density cinnamic acid solution are taken, two kinds of solution are mixed into
Together, stir, after compounding, the concentration of vanillic aldehyde is 0.005mol/L~0.020mol/L, and the concentration of cinnamic acid is
0.005mol/L~0.020mol/L.
In the present embodiment, 30mL vanillic aldehydes solution and 30mL cinnamic acids solution is taken to mix and compounded.
The present invention will compound to the harmless vanillic aldehyde of human body and environment and cinnamic acid, effectively reduce harmful inhibition
Harm of the agent to environment and the mankind, it is a kind of safety-type composite corrosion inhibitor.
4th, henchnmrk test and result
1st, henchnmrk test
(1) metal copper sample is handled
Copper sheet is first processed into the disk that specification is Ф 14.5mm × 3mm with wire cutting method, then sample test face used
400#, 800#, 1000# and 1200# abrasive paper for metallograph are polished step by step, then are polished with polishing machine, finally successively with acetone, ethanol and
Redistilled water cleans, standby after drying.
(2) corrosion test is carried out to metal copper sample
Using the hydrochloric acid solution that mass fraction is 15% as acid medium, metal copper sample is respectively put into various concentrations 50mL
Vanillic aldehyde corrosion inhibiter (298K), cinnamic acid corrosion inhibiter (298K) and various concentrations 60mL compound corrosion inhibitor in (298K), leaching
12h-18h is steeped, takes out, is subsequently placed in be measured in 20mL hydrochloric acid solution.
(3) electro-chemical test is carried out
Electrochemistry experiment test is carried out to the metal copper sample after immersion, including：Polarization curve and impedance curve (repeat
Three times), while using software to curve obtained it is fitted, obtains corroding electrokinetic potential fitting parameter and impedance fitting parameter.
2nd, result of the test
Electrochemical results
The size of corrosion electric current density of the metal in corrosive medium is one of important indicator for evaluating its decay resistance,
Corrosion electric current density is bigger, and metal erosion is more serious.In Nyquist curves, capacitive reactance arc radius is bigger, charge transfer resistance resistance
It is bigger, i.e., corrosive ions attack metal when need to overcome bigger resistance, the corrosion resistance of metal is better.
Tafel polarization curve and Nyquist curve such as Fig. 1 and 2 of the copper in the vanillic aldehyde corrosion inhibitor solution of various concentrations
It is shown, Tafel polarization curve and Nyquist curve such as Fig. 3 and 4 institute of the copper in the cinnamic acid corrosion inhibitor solution of various concentrations
Show, Tafel polarization curve and Nyquist curve of the copper in the compound corrosion inhibitor solution of various concentrations are as it can be seen in figures 5 and 6, profit
Polarization curve and impedance curve are fitted with related software, and equivalent circuit diagram such as Figure 13 during impedance curve fitting, obtain
To corrosion electrokinetic potential and impedance fitting parameter be shown in Table 1~6 (HCl concentration be 4.865molL-1)。
It can be seen that from Fig. 1~6 and table 1~6：When not adding corrosion inhibiter, corrosion electric current density is 63.137 × 10- 5A·cm-2, the charge transfer resistance in solution is 10.63 Ω cm2；After adding corrosion inhibiter, there are different journeys in polarization curve
Degree moves to left, and the radius of capacitive reactance arc significantly increases in impedance curve, shows the addition of corrosion inhibiter, to Chloride Attack metallic copper table
The process in face serves certain inhibition.The covering of copper surface corrosion inhibiter film layer can be calculated using formula (1)
Spend size.Add 0.01molL-1Vanillic aldehyde corrosion inhibitor solution when, corrosion electric current density minimum 5.277 × 10-5A·cm-2, Rct is up to 85.50 Ω cm2, film surface coverage is preferably 0.8757, and inhibition efficiency is up to 87.57%；Add
0.015mol·L-1During cinnamic acid corrosion inhibitor solution, corrosion electric current density minimum 1.122 × 10-5A·cm-2, Rct is up to
80.92Ω·cm2, film surface coverage is preferably 0.8686, and inhibition efficiency is up to 86.86%；And add compounding inhibition
After agent, corrosion electric current density minimum 0.9259 × 10-5A·cm-2, Rct is up to 650.10 Ω cm2, film surface covering
Degree preferably 0.9836, inhibition efficiency is up to 98.36%, and now vanillic aldehyde solution concentration is 0.01molL-1, cinnamic acid is molten
Liquid concentration is 0.02molL-1.Correction data can substantially observe that the corrosion electric current density after compounding is smaller, capacitive reactance arc
Radius is bigger, and inhibition efficiency is far longer than single corrosion inhibiter, illustrates that compound corrosion inhibitor more can effectively slow down chlorion to gold
Belong to the erosion and destruction of copper.
Wherein：θ is coverage,And RctDo not add corrosion inhibiter respectively and add the charge transfer resistance of corrosion inhibiter.
Electrokinetic potential fitting data of the bronze medal of table 1 in vanillic aldehyde corrosion inhibitor solution
Impedance fitting data of the bronze medal of table 2 in vanillic aldehyde corrosion inhibitor solution
Electrokinetic potential fitting data of the bronze medal of table 3 in cinnamic acid corrosion inhibitor solution
Impedance fitting data of the bronze medal of table 4 in cinnamic acid corrosion inhibitor solution
Electrokinetic potential fitting data of the bronze medal of table 5 in compound corrosion inhibitor solution
Impedance fitting data of the bronze medal of table 6 in compound corrosion inhibitor solution
Embodiment 2
First, vanillic aldehyde solution is prepared
Vanillic aldehyde is Chinese medicines group chemical reagent, analyzes pure, white powder.Weighed respectively with assay balance 0.038g,
0.076g, 0.114g and 0.152g (error range is ± 0.0002g) vanillic aldehyde powder are simultaneously dissolved in 50mL distilled water respectively
In, obtain the vanillic aldehyde solution that concentration is respectively 0.005mol/L, 0.010mol/L, 0.015mol/L and 0.020mol/L.
Vanillic aldehyde is a kind of aldehydes organic matter, is largely present in the plants such as beet, vanilla bean, is easy to extract, environmental protection,
Health, belong to organic inhibitor, it is all harmless to human body and environment.
2nd, cinnamic acid solution is prepared
Cinnamic acid is Chinese medicines group chemical reagent, analyzes pure, buff oily liquids.Weigh four parts successively with graduated cylinder
0.5mL solution, is diluted to 755mL, 378mL, 252mL and 189mL respectively, obtain concentration be respectively 0.005mol/L,
0.010mol/L, 0.015mol/L and 0.020mol/L cinnamic acid solution.
Cinnamic acid is a kind of aldehydes organic matter, is extracted from animals and plants, safe and environment-friendly, green, belongs to organic inhibitor, right
Human body and environment are all harmless.
3rd, compound
Appropriate certain density vanillic aldehyde solution and appropriate certain density cinnamic acid solution are taken, two kinds of solution are mixed into
Together, stir, after compounding, the concentration of vanillic aldehyde is 0.005mol/L~0.020mol/L, and the concentration of cinnamic acid is
0.005mol/L~0.020mol/L.
In the present embodiment, 30mL vanillic aldehydes solution and 30mL cinnamic acids solution is taken to mix and compounded.
The present invention will compound to the harmless vanillic aldehyde of human body and environment and cinnamic acid, effectively reduce harmful inhibition
Harm of the agent to environment and the mankind, it is a kind of safety-type composite corrosion inhibitor.
4th, henchnmrk test and result
1st, henchnmrk test
(1) N80 steel samples are handled
N80 pieces are first processed into the disk that specification is Ф 14.5mm × 3mm with wire cutting method, then sample test face used
400#, 800#, 1000# and 1200# abrasive paper for metallograph are polished step by step, then are polished with polishing machine, finally successively with acetone, ethanol and
Redistilled water cleans, standby after drying.
(2) corrosion test is carried out to N80 steel samples
Using the hydrochloric acid solution that mass fraction is 15% as acid medium, N80 samples are respectively put into various concentrations 50mL's
In the compound corrosion inhibitor of vanillic aldehyde corrosion inhibiter (298K), cinnamic acid corrosion inhibiter (298K) and various concentrations 60mL (298K), immersion
12h-18h, take out, be subsequently placed in be measured in 20mL hydrochloric acid solution.
(3) electro-chemical test is carried out
Electrochemistry experiment test is carried out to the N80 samples after immersion, including：Polarization curve and impedance curve (repeat three
It is secondary), while curve obtained is fitted using software, obtain corroding electrokinetic potential fitting parameter and impedance fitting parameter.
2nd, result of the test
Electrochemical results
Tafel polarization curve and Nyquist curve such as Fig. 7 of the N80 steel in the vanillic aldehyde corrosion inhibitor solution of various concentrations
Shown in 8, Tafel polarization curve and Nyquist curve such as Fig. 9 of the N80 steel in the cinnamic acid corrosion inhibitor solution of various concentrations
Shown in 10, Tafel polarization curve and Nyquist curve such as Figure 11 of the N80 steel in the compound corrosion inhibitor solution of various concentrations
Shown in 12, polarization curve and impedance curve are fitted using related software, and equivalent circuit during impedance curve fitting
Figure such as Figure 13, obtained corrosion electrokinetic potential and impedance fitting parameter is shown in Table 7~12, and (HCl concentration is 4.865molL-1)。
Observe Fig. 7~12 and table 7~12 is can be found that：When not adding corrosion inhibiter, corrosion electric current density is 7.52 × 10- 3A·cm-2, the charge transfer resistance in solution is 9.366 Ω cm2；After adding different corrosion inhibiter, polarization curve occurs
Different degrees of moves to left, and the radius of capacitive reactance arc significantly increases in impedance curve, shows the addition of corrosion inhibiter, the corruption to metal N80
Erosion serves certain inhibition.It is embodied in and adds 0.015molL-1Vanillic aldehyde corrosion inhibitor solution when, corrosion electricity
Current density minimum 0.627 × 10-3A·cm-2, Rct is up to 72.84 Ω cm2, film surface coverage is preferably
0.8714, inhibition efficiency is up to 87.14%；Add 0.02molL-1During cinnamic acid corrosion inhibitor solution, corrosion electric current density is most
Small is 0.486 × 10-3A·cm-2, Rct is up to 57.93 Ω cm2, film surface coverage is preferably 0.8383, inhibition effect
Rate is up to 83.83%；And after adding compound corrosion inhibitor, corrosion electric current density minimum 0.227 × 10-3A·cm-2, Rct is most
Greatly 105.1 Ω cm2, film surface coverage is preferably 0.9104, and inhibition efficiency is up to 91.04%, now vanillic aldehyde
Solution concentration is 0.01molL-1, cinnamic acid solution concentration is 0.015molL-1.Compound corrosion inhibitor described above can more have
Slow down corrosion of the chlorion to N80 in effect ground.
Electrokinetic potential fitting data of the N80 of table 7 in vanillic aldehyde corrosion inhibitor solution
Impedance fitting data of the N80 of table 8 in vanillic aldehyde corrosion inhibitor solution
Electrokinetic potential fitting data of the N80 of table 9 in cinnamic acid corrosion inhibitor solution
Impedance fitting data of the N80 of table 10 in cinnamic acid corrosion inhibitor solution
Electrokinetic potential fitting data of the N80 of table 11 in aldehyde corrosion inhibitor solution is compounded
Impedance fitting data of the N80 of table 12 in compound corrosion inhibitor solution
Enumerated in table 13 for similar experiment in document part under the conditions of, the inhibition efficiency of some conventional corrosion inhibiter.Therefrom may be used
To find out, under the conditions of similar experiment, the inhibition efficiency effect after vanillic aldehyde compounds with cinnamic acid is more obvious, although concentration ratio
Other corrosion inhibiter are higher, but it can be extracted from animals and plants, and tri- kinds of elements of C, H, O are comprised only in molecule, will not be to environment
Threatened with the mankind.And contain the hetero atoms such as S, N in the inhibitor molecular such as thiocarbamide (TU) and hexa (HMTA),
Certain pollution can be caused to environment etc. during synthesis and application.Therefore, on the premise of economic benefit is ensured, ring is considered
Guarantor's factor, the compound corrosion inhibitor after vanillic aldehyde mixes with cinnamic acid have bigger prospects for commercial application.
In summary, after vanillic aldehyde compounds according to a certain percentage with cinnamic acid, metallic copper, N80 steel can effectively be slowed down
Corrosion in hydrochloric acid medium, and the compound corrosion inhibitor is green, safe and harmless.
The comparison of several corrosion inhibiter under the conditions of the similar experiment of table 13
Note：TU:Thiourea；
HMTA:Hexamethylenetetramine；
PP-1:5-styryl-2,7-dithioxo-2,3,5,6,7,8-hexahydropyrimido[4,5-d]-
pyrimidin-4(1H).
PP-2:5-(2-hydroxyphenyl)-2,7-dithioxo-2,3,5,6,7,8-hexahydropyrimido
[4,5-d]-pyrimidin-4(1H).
Disclosed above is only the specific embodiment of the present invention, and still, the embodiment of the present invention is not limited to this, Ren Heben
What the technical staff in field can think change should all fall into protection scope of the present invention.
Claims (8)
1. a kind of green compound corrosion inhibitor, it is characterised in that formed by vanillic aldehyde solution and cinnamic acid solution compounding.
A kind of 2. green compound corrosion inhibitor as claimed in claim 1, it is characterised in that vanillic aldehyde in gained corrosion inhibiter after compounding
Concentration be 0.005mol/L~0.020mol/L, the concentration of cinnamic acid is 0.005mol/L~0.020mol/L.
A kind of 3. green compound corrosion inhibitor as claimed in claim 2, it is characterised in that vanillic aldehyde in gained corrosion inhibiter after compounding
Concentration be 0.010mol/L, the concentration of cinnamic acid is 0.020mol/L.
A kind of 4. green compound corrosion inhibitor as claimed in claim 2, it is characterised in that vanillic aldehyde in gained corrosion inhibiter after compounding
Concentration be 0.010mol/L, the concentration of cinnamic acid is 0.015mol/L.
5. a kind of green compound corrosion inhibitor as claimed in claim 1, it is characterised in that dilute the solvent used in the vanillic aldehyde
For distilled water, it is distilled water to dilute the solvent used in the cinnamic acid.
6. a kind of green compound corrosion inhibitor as claimed in claim 1, it is characterised in that the hydrochloric acid medium is that mass fraction is
15% hydrochloric acid solution.
7. a kind of green compound corrosion inhibitor as claimed in claim 1 effectively slow down copper, N80 steel corrodes in hydrochloric acid medium
Using.
8. a kind of green compound corrosion inhibitor as claimed in claim 7 effectively slow down copper, N80 steel corrodes in hydrochloric acid medium
Using, it is characterised in that the application is specifically what is followed the steps below：
(1) metallic copper, N80 steel are handled：It is Ф 14.5mm that copper sheet and N80 steel discs are processed into specification using wire cutting method
× 3mm disk；Sample test face is polished step by step with 400#, 800#, 1000# and 1200# abrasive paper for metallograph, then uses polishing machine
It is polished；Cleaned successively with acetone, ethanol and redistilled water, it is standby after drying；
(2) thermostat water bath is opened, bath temperature is set to 298K, the container equipped with corrosion inhibiter is put into thermostat water bath；
(3) metallic copper, N80 steel samples are respectively put into corrosion inhibiter, are taken out after soaking 12h-18h, be subsequently placed in hydrochloric acid solution
In.
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101818350A (en) * | 2010-04-29 | 2010-09-01 | 同济大学 | Anti-oil well metal equipment corrosion inhibitor, preparation method and using method thereof |
| CN105883947A (en) * | 2016-06-29 | 2016-08-24 | 欣格瑞（山东）环境科技有限公司 | Green medicament used for zero discharge of circulating water |
| CN107217267A (en) * | 2017-05-25 | 2017-09-29 | 西北大学 | It is a kind of to suppress the environmental type compound corrosion inhibitor that copper corrodes in acid medium |
-
2017
- 2017-10-25 CN CN201711007639.2A patent/CN107675182A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101818350A (en) * | 2010-04-29 | 2010-09-01 | 同济大学 | Anti-oil well metal equipment corrosion inhibitor, preparation method and using method thereof |
| CN105883947A (en) * | 2016-06-29 | 2016-08-24 | 欣格瑞（山东）环境科技有限公司 | Green medicament used for zero discharge of circulating water |
| CN107217267A (en) * | 2017-05-25 | 2017-09-29 | 西北大学 | It is a kind of to suppress the environmental type compound corrosion inhibitor that copper corrodes in acid medium |
Non-Patent Citations (1)
| Title |
|---|
| 曾宪光等: "环境友好缓蚀剂的研究现状和展望", 《腐蚀与防护》 * |
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