CN101376981A - 3-amino-1,2,4-triazol as corrosion inhibitor of cupronickel B30 - Google Patents
3-amino-1,2,4-triazol as corrosion inhibitor of cupronickel B30 Download PDFInfo
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- CN101376981A CN101376981A CNA2008102005042A CN200810200504A CN101376981A CN 101376981 A CN101376981 A CN 101376981A CN A2008102005042 A CNA2008102005042 A CN A2008102005042A CN 200810200504 A CN200810200504 A CN 200810200504A CN 101376981 A CN101376981 A CN 101376981A
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- Prior art keywords
- amino
- triazole
- cupronickel
- corrosion
- electrode
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- 229910000570 Cupronickel Inorganic materials 0.000 title claims description 38
- 238000005260 corrosion Methods 0.000 title abstract description 34
- 230000007797 corrosion Effects 0.000 title abstract description 34
- KLSJWNVTNUYHDU-UHFFFAOYSA-N Amitrole Chemical compound NC1=NC=NN1 KLSJWNVTNUYHDU-UHFFFAOYSA-N 0.000 title abstract description 14
- 239000003112 inhibitor Substances 0.000 title abstract description 12
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 claims abstract description 32
- 239000011780 sodium chloride Substances 0.000 claims abstract description 16
- SNTWKPAKVQFCCF-UHFFFAOYSA-N 2,3-dihydro-1h-triazole Chemical compound N1NC=CN1 SNTWKPAKVQFCCF-UHFFFAOYSA-N 0.000 claims description 30
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 abstract description 4
- 239000010949 copper Substances 0.000 abstract description 4
- 229910000881 Cu alloy Inorganic materials 0.000 abstract 3
- 229910000990 Ni alloy Inorganic materials 0.000 abstract 3
- 230000002401 inhibitory effect Effects 0.000 abstract 2
- 239000000243 solution Substances 0.000 description 15
- 230000000116 mitigating effect Effects 0.000 description 9
- 230000005764 inhibitory process Effects 0.000 description 4
- 239000012528 membrane Substances 0.000 description 4
- 230000010287 polarization Effects 0.000 description 4
- 239000008367 deionised water Substances 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 2
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- 239000007864 aqueous solution Substances 0.000 description 2
- 229960000935 dehydrated alcohol Drugs 0.000 description 2
- 229910021641 deionized water Inorganic materials 0.000 description 2
- 239000003814 drug Substances 0.000 description 2
- 238000002847 impedance measurement Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 229910001369 Brass Inorganic materials 0.000 description 1
- 241000370738 Chlorion Species 0.000 description 1
- 239000004593 Epoxy Substances 0.000 description 1
- 206010034972 Photosensitivity reaction Diseases 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 229910021529 ammonia Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000003115 biocidal effect Effects 0.000 description 1
- 230000004071 biological effect Effects 0.000 description 1
- 239000012490 blank solution Substances 0.000 description 1
- 239000010951 brass Substances 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- YOCUPQPZWBBYIX-UHFFFAOYSA-N copper nickel Chemical compound [Ni].[Cu] YOCUPQPZWBBYIX-UHFFFAOYSA-N 0.000 description 1
- RAABOESOVLLHRU-UHFFFAOYSA-N diazene Chemical compound N=N RAABOESOVLLHRU-UHFFFAOYSA-N 0.000 description 1
- 229910000071 diazene Inorganic materials 0.000 description 1
- ZOMNIUBKTOKEHS-UHFFFAOYSA-L dimercury dichloride Chemical class Cl[Hg][Hg]Cl ZOMNIUBKTOKEHS-UHFFFAOYSA-L 0.000 description 1
- 229940079593 drug Drugs 0.000 description 1
- 239000000975 dye Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000005530 etching Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 230000000855 fungicidal effect Effects 0.000 description 1
- 239000000417 fungicide Substances 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 239000000314 lubricant Substances 0.000 description 1
- 229910052748 manganese Inorganic materials 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 230000036211 photosensitivity Effects 0.000 description 1
- 239000005648 plant growth regulator Substances 0.000 description 1
- 238000005498 polishing Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000013535 sea water Substances 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 241000894007 species Species 0.000 description 1
- 230000009885 systemic effect Effects 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 150000003852 triazoles Chemical class 0.000 description 1
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- Preventing Corrosion Or Incrustation Of Metals (AREA)
Abstract
The invention relates to anti-corrosive inhibitor with 3-amino-1, 2, 4 triazole as the copper and nickel alloy B30. In 3 percent NaCl solution, the use concentration of the anti-corrosive inhibitor with 3-amino-1, 2, 4 triazole as the copper and nickel alloy B30 is 5mg.L<-1> to 17.5mg.L<-1>; when the use concentration is 15mg.L<-1>, the inhibiting effect is the best. Electrochemical data shows that after 15mg.L<-1> of 3-amino-1, 2, 4 triazole is added into the 3 percent NaCl solution, the corrosion current of the copper and nickel alloy B30 is reduced from 6.797mu A.cm<-2> to 0.2438mu A.cm<-2>, and the inhibiting efficiency is about 96.85 percent.
Description
Technical field
The present invention relates to 3-amino-1,2, the 4-triazole is as the anticorrosion corrosion inhibitor of cupronickel B 30.
Background technology
The seawater corrosion resistance of cupronickel and anti-ammonia corrosion performance are much better than brass, the air removal section of beach plant condenser and landlocked plant condenser is often selected White Copper Tubes (cupronickel) for use, the domestic trade mark commonly used is a cupronickel B 30, and promptly copper nickel content was about for 70% and 30% (containing elements such as micro Fe, Mn in the alloy) respectively.Cupronickel all has application at many industrial circles such as shipbuilding, power stations, especially heat exchanger, still, heat exchanger contains chlorion cupronickel is caused heavy corrosion, studies show that adding inhibiter when nickel content is low in the cupronickel is the best method that suppresses metallic corrosion.
3-amino-1,2, the 4-triazole has very strong chelating, photosensitivity and biological activity, therefore is widely used in the synthetic and preparation of antibiotic class medicine, triazole species diimide dyestuff, sensitive materials, systemic fungicide and plant-growth regulator, is a kind of green corrosion inhibitor.In addition, it can also directly be used as weedicide, lubricant metal inhibitor etc.
At present, both at home and abroad this Research on Corrosion Inhibitor still is in the junior stage, and 3-amino-1,2, the 4-triazole is not seen in report as yet as the Corrosion Inhibition to cupronickel B 30.
Summary of the invention
Technical problem to be solved by this invention is with 3-amino-1,2, and the 4-triazole is as the anticorrosive metal inhibiter of cupronickel B 30.
The technical solution used in the present invention:
With 3-amino-1,2, the 4-triazole is as the anticorrosion corrosion inhibitor of cupronickel B 30, and its concentration of NaCl solution 3% is 5mg/L
-1～17.5mg/L
-1
When at 3% NaCl solution 3-amino-1,2, the concentration of 4-triazole is 15mgL
-1The time 3-amino-1,2, the 4-triazole is as corrosion mitigating effect the best of the anticorrosion corrosion inhibitor of cupronickel B 30.
The beneficial effect of the invention
The present invention is with 3-amino-1,2, and the conduct of 4-triazole is in the anticorrosion corrosion inhibitor of cupronickel B 30.Electrochemical data shows in 3% NaCl solution and adds 15mgL
-13-amino-1,2, the corrosion current of cupronickel B 30 is from 6.797 μ Acm behind the 4-triazole
-2Drop to 0.2138 μ Acm
-2, inhibition efficiency is 96.85%.
Description of drawings
Fig. 1 is that the cupronickel B 30 electrode is immersed in different concns 3-amino-1,2 in the 3%NaCl solution, the alternating-current impedance figure of 4-triazole (Nyquist figure);
Fig. 2 is that the cupronickel B 30 electrode is immersed in different concns 3-amino-1,2 in the 3%NaCl solution, the alternating-current impedance figure of 4-triazole (Bode figure);
Fig. 3 is that the cupronickel B 30 electrode is immersed in different concns 3-amino-1,2 in the 3%NaCl solution, the polarization curve of 4-triazole.
Embodiment
Below by accompanying drawing the present invention is done to describe in further detail, 3-amino-1,2,4-triazole are as the anticorrosion corrosion inhibitor of cupronickel B 30, and concentration is 5mg/L in 3%NaCl solution
-1～17.5mg/L
-1, when its concentration is 15mgL
-1The time, 3-amino-1,2,4-triazole is during as the anticorrosion corrosion inhibitor of cupronickel B 30, corrosion mitigating effect the best.
Embodiment
Medicine and instrument
Dehydrated alcohol, 3-amino-1,2,4-triazole, sodium chloride, reagent is analytical pure, and the laboratory water is a deionized water;
ZF-9 type potentiostat (the square Electronics Co., Ltd in Shanghai), CHI66OC electrochemical workstation (Shanghai occasion China instrument company).
The test frequency scope of alternating-current impedance is at 100.00kHz～50mHz, and ac-excited signal peak is 5mV; The scanning speed of polarization curve is 2mV/s.
Adopt classical three-electrode system in the experiment, working electrode is the cupronickel B 30 electrode, and supporting electrode and reference electrode are respectively Pt electrode and saturated calomel electrode.
The cupronickel B 30 electrode
The cupronickel B 30 electrode selects for use pure copper material to test.Cupronickel B 30 electrode non-working surface is made with epoxy sealing.Electrode area is 0.24cm
2, cupronickel B 30 electrode 0#-6# abrasive paper for metallograph sanding and polishing step by step before measuring, washed with de-ionized water is carried out oil removing with dehydrated alcohol then, puts into electrolyzer after rinsing well with deionized water at last.
The 3-amino-1,2 of different concns, the 4-triazole
Press table 1 and in the 3%NaCl aqueous solution, prepare the 3-amino-1,2 of different concns, 4-triazole
The 3-amino-1,2 of different concns in the table 1:3%NaCl aqueous solution, the 4-triazole
Ac impedance measurement:
Fig. 1 is that cupronickel B 30 is at table 1 different concns 3-amino-1,2, the alternating-current impedance figure in the 4-triazole solution behind the 0.5h.In solution, there is 3-amino-1,2, during the 4-triazole, 3-amino-1,2,4-triazole and metal function form a kind of protective membrane, embody corrosion mitigating effect.Corresponding ac impedance measurement result is impedance spectrogram (Nyquist figure), and the impedance spectrogram is irregular capacitive reactance arc, and the chord length on arc and the Z axle is corresponding to the membrane resistance Rf of B30 electrode, and Rf is big more, illustrates that corrosion mitigating effect is good more.
From Fig. 1 we as can be seen, compare with blank solution, add 3-amino-1,2, the impedance spectrogram chord length that the cupronickel B 30 electrode pair of 4-triazole is answered obviously increases R
fIncrease, 3-amino-1,2 is described, corrosion has tangible corrosion inhibition to the 4-triazole to cupronickel B 30.In addition, it can also be seen that along with 3-amino-1,2,4-triazole concentration is from 0mgL from Fig. 1
-1To 17.5mgL
-1, corresponding impedance spectrogram chord length obviously increases R
fIncrease, corrosion mitigating effect is best, but 3-amino-1,2,4-triazole concentration surpasses 15g/mL
-1After, impedance spectrogram chord length is on a declining curve, therefore, 3-amino-1,2,4-triazole concentration is 15mgL
-1The time, best to cupronickel B 30 corrosive corrosion mitigating effect.
Fig. 2 be cupronickel B 30 at table 1 different concns 3-amino-1,2, alternating-current impedance (Bode) in the 4-triazole solution behind 0.5h figure.The corrosion resisting property of electrode can be by the Impedance Membrane value of low frequency | and Z| characterizes, the Impedance Membrane value | and Z| is big more, and then the corrosive effect of electrode is good more, also 3-amino-1,2 as can be seen from Fig. 2, the 4-triazole has certain corrosion mitigating effect to cupronickel B 30, when 3-amino-1,2,4-triazole concentration is 15mgL
-1The time | the Z|0.05 maximum, to cupronickel B 30 corrosive corrosion mitigating effect the best.
Polarization curve is analyzed:
Fig. 3 be cupronickel B 30 at table 1 different concns 3-amino-1,2, the polarization curve in the 4-triazole solution behind the 0.5h, its relevant electrochemical data is listed in table 2 (corrosion rate η=(I wherein
0Corr-Icorr)/I
0Corr, wherein I
0Each expression of corr, Icorr does not add and has added 3-amino-1,2, the corrosion electric current density of 4-triazole).
Table 2: different concns 3-amino-1,2, corrosion potential, corrosion electric current density and corrosion rate in the 4-triazole solution
| 3-amino-1,2,4-triazole (mgL -1) | Ecorr (mV) | Icorr (μA·cm -2) | η (％) |
| 0 | -241 | 6.797 | / |
| 5 | -330 | 0.3091 | 95.45 |
| 10 | -327 | 0.2775 | 95.92 |
| 12.5 | -292 | 0.2623 | 96.14 |
| 15 | -280 | 0.2138 | 96.85 |
| 17.5 | -317 | 0.3436 | 94.94 |
The corrosion current of cupronickel B 30 electrode was 11.52 μ Acm when 3%NaCl solution was blank as known from Table 2
-2, add 17.5mgL
-13-amino-1,2,4-triazole post-etching electric current is reduced to 0.2138 μ Acm
-2, inhibition efficiency is 96.85%, and 3-amino-1,2 is described, the 4-triazole has tangible corrosion mitigating effect to the cupronickel B 30 in the 3%NaCl solution.This result is consistent with the conclusion that AC impedence method draws.
Above said content only is the basic explanation of the present invention under conceiving, and according to any equivalent transformation that technical scheme of the present invention is done, all should belong to protection scope of the present invention.
Claims (2)
1,3-amino-1,2, the 4-triazole is characterized in that the inhibiter as cupronickel B 30,3-amino-1,2 in 3%NaCl solution, 4-triazole concentration is 5mgL
-1～50mgL
-1
2,3-amino-1,2 according to claim 1, the 4-triazole is characterized in that: 3-amino-1,2 in 3% NaCl solution, 4-triazole concentration is 15mgL
-1
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008102005042A CN101376981A (en) | 2008-09-26 | 2008-09-26 | 3-amino-1,2,4-triazol as corrosion inhibitor of cupronickel B30 |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008102005042A CN101376981A (en) | 2008-09-26 | 2008-09-26 | 3-amino-1,2,4-triazol as corrosion inhibitor of cupronickel B30 |
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| Publication Number | Publication Date |
|---|---|
| CN101376981A true CN101376981A (en) | 2009-03-04 |
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|---|---|---|---|
| CNA2008102005042A Pending CN101376981A (en) | 2008-09-26 | 2008-09-26 | 3-amino-1,2,4-triazol as corrosion inhibitor of cupronickel B30 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2602575C2 (en) * | 2015-02-06 | 2016-11-20 | Общество с ограниченной ответственностью "ТЕХНОХИМ" | Corrosion inhibitors of copper and copper-containing alloys |
| CN107287599A (en) * | 2017-05-31 | 2017-10-24 | 上海师范大学 | A kind of metal copper inhibitor |
| RU2679022C2 (en) * | 2017-07-17 | 2019-02-05 | федеральное государственное бюджетное образовательное учреждение высшего образования "Воронежский государственный университет" (ФГБОУ ВО "ВГУ") | Corrosion inhibitor for copper and copper-containing alloys in neutral chloride solutions (options) |
-
2008
- 2008-09-26 CN CNA2008102005042A patent/CN101376981A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2602575C2 (en) * | 2015-02-06 | 2016-11-20 | Общество с ограниченной ответственностью "ТЕХНОХИМ" | Corrosion inhibitors of copper and copper-containing alloys |
| CN107287599A (en) * | 2017-05-31 | 2017-10-24 | 上海师范大学 | A kind of metal copper inhibitor |
| RU2679022C2 (en) * | 2017-07-17 | 2019-02-05 | федеральное государственное бюджетное образовательное учреждение высшего образования "Воронежский государственный университет" (ФГБОУ ВО "ВГУ") | Corrosion inhibitor for copper and copper-containing alloys in neutral chloride solutions (options) |
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Open date: 20090304 |