CN103436888A - High temperature copper corrosion inhibitor containing benzimidazole and preparation method of high temperature copper corrosion inhibitor - Google Patents
High temperature copper corrosion inhibitor containing benzimidazole and preparation method of high temperature copper corrosion inhibitor Download PDFInfo
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- CN103436888A CN103436888A CN2013103718781A CN201310371878A CN103436888A CN 103436888 A CN103436888 A CN 103436888A CN 2013103718781 A CN2013103718781 A CN 2013103718781A CN 201310371878 A CN201310371878 A CN 201310371878A CN 103436888 A CN103436888 A CN 103436888A
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- 239000010949 copper Substances 0.000 title claims abstract description 64
- 229910052802 copper Inorganic materials 0.000 title claims abstract description 64
- 230000007797 corrosion Effects 0.000 title claims abstract description 64
- 238000005260 corrosion Methods 0.000 title claims abstract description 64
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 title claims abstract description 63
- 239000003112 inhibitor Substances 0.000 title claims abstract description 36
- HYZJCKYKOHLVJF-UHFFFAOYSA-N 1H-benzimidazole Chemical compound C1=CC=C2NC=NC2=C1 HYZJCKYKOHLVJF-UHFFFAOYSA-N 0.000 title claims abstract description 25
- 238000002360 preparation method Methods 0.000 title description 7
- YXIWHUQXZSMYRE-UHFFFAOYSA-N 1,3-benzothiazole-2-thiol Chemical compound C1=CC=C2SC(S)=NC2=C1 YXIWHUQXZSMYRE-UHFFFAOYSA-N 0.000 claims abstract description 40
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims abstract description 36
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 26
- QRUDEWIWKLJBPS-UHFFFAOYSA-N benzotriazole Chemical compound C1=CC=C2N[N][N]C2=C1 QRUDEWIWKLJBPS-UHFFFAOYSA-N 0.000 claims abstract description 23
- 239000012964 benzotriazole Substances 0.000 claims abstract description 23
- 239000000203 mixture Substances 0.000 claims abstract description 8
- KAESVJOAVNADME-UHFFFAOYSA-N Pyrrole Chemical compound C=1C=CNC=1 KAESVJOAVNADME-UHFFFAOYSA-N 0.000 claims abstract 3
- 238000000034 method Methods 0.000 claims description 9
- -1 benzimidazole compound Chemical class 0.000 claims description 6
- 150000001556 benzimidazoles Chemical class 0.000 claims description 5
- 239000008367 deionised water Substances 0.000 claims description 4
- 229910021641 deionized water Inorganic materials 0.000 claims description 4
- 238000003756 stirring Methods 0.000 claims description 4
- DWYHDSLIWMUSOO-UHFFFAOYSA-N 2-phenyl-1h-benzimidazole Chemical compound C1=CC=CC=C1C1=NC2=CC=CC=C2N1 DWYHDSLIWMUSOO-UHFFFAOYSA-N 0.000 claims description 3
- CMGDVUCDZOBDNL-UHFFFAOYSA-N 4-methyl-2h-benzotriazole Chemical compound CC1=CC=CC2=NNN=C12 CMGDVUCDZOBDNL-UHFFFAOYSA-N 0.000 claims 3
- FGYADSCZTQOAFK-UHFFFAOYSA-N 1-methylbenzimidazole Chemical compound C1=CC=C2N(C)C=NC2=C1 FGYADSCZTQOAFK-UHFFFAOYSA-N 0.000 claims 1
- LDZYRENCLPUXAX-UHFFFAOYSA-N 2-methyl-1h-benzimidazole Chemical compound C1=CC=C2NC(C)=NC2=C1 LDZYRENCLPUXAX-UHFFFAOYSA-N 0.000 claims 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims 1
- ZUOUZKKEUPVFJK-UHFFFAOYSA-N diphenyl Chemical compound C1=CC=CC=C1C1=CC=CC=C1 ZUOUZKKEUPVFJK-UHFFFAOYSA-N 0.000 claims 1
- 229910052739 hydrogen Inorganic materials 0.000 claims 1
- 239000001257 hydrogen Substances 0.000 claims 1
- 150000002460 imidazoles Chemical class 0.000 claims 1
- KKCBUQHMOMHUOY-UHFFFAOYSA-N sodium oxide Chemical compound [O-2].[Na+].[Na+] KKCBUQHMOMHUOY-UHFFFAOYSA-N 0.000 claims 1
- 229910001948 sodium oxide Inorganic materials 0.000 claims 1
- 239000000498 cooling water Substances 0.000 abstract description 8
- 230000000694 effects Effects 0.000 abstract description 8
- 230000005764 inhibitory process Effects 0.000 abstract description 8
- 238000000859 sublimation Methods 0.000 abstract description 5
- 230000008022 sublimation Effects 0.000 abstract description 5
- RKMOGOGTQIHYMN-UHFFFAOYSA-N 4-(2-methylphenyl)-2h-benzotriazole Chemical compound CC1=CC=CC=C1C1=CC=CC2=NNN=C12 RKMOGOGTQIHYMN-UHFFFAOYSA-N 0.000 abstract 2
- 239000004480 active ingredient Substances 0.000 abstract 1
- 150000001879 copper Chemical class 0.000 abstract 1
- 230000000116 mitigating effect Effects 0.000 description 17
- 239000000463 material Substances 0.000 description 12
- 238000012360 testing method Methods 0.000 description 11
- 229910001369 Brass Inorganic materials 0.000 description 9
- 229910000570 Cupronickel Inorganic materials 0.000 description 9
- 229910045601 alloy Inorganic materials 0.000 description 9
- 239000000956 alloy Substances 0.000 description 9
- 239000010951 brass Substances 0.000 description 9
- YOCUPQPZWBBYIX-UHFFFAOYSA-N copper nickel Chemical compound [Ni].[Cu] YOCUPQPZWBBYIX-UHFFFAOYSA-N 0.000 description 9
- 230000003020 moisturizing effect Effects 0.000 description 8
- 229910000831 Steel Inorganic materials 0.000 description 7
- 238000005530 etching Methods 0.000 description 7
- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 description 7
- 239000010959 steel Substances 0.000 description 7
- 238000009749 continuous casting Methods 0.000 description 5
- 150000003851 azoles Chemical class 0.000 description 4
- 241001124569 Lycaenidae Species 0.000 description 3
- 239000000470 constituent Substances 0.000 description 3
- 235000014987 copper Nutrition 0.000 description 3
- 238000003795 desorption Methods 0.000 description 3
- JPVYNHNXODAKFH-UHFFFAOYSA-N Cu2+ Chemical compound [Cu+2] JPVYNHNXODAKFH-UHFFFAOYSA-N 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 229940125782 compound 2 Drugs 0.000 description 2
- 239000004020 conductor Substances 0.000 description 2
- 239000002826 coolant Substances 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 239000003814 drug Substances 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 230000003134 recirculating effect Effects 0.000 description 2
- BHPQYMZQTOCNFJ-UHFFFAOYSA-N Calcium cation Chemical compound [Ca+2] BHPQYMZQTOCNFJ-UHFFFAOYSA-N 0.000 description 1
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 1
- 229910001200 Ferrotitanium Inorganic materials 0.000 description 1
- 229910001424 calcium ion Inorganic materials 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000000460 chlorine Substances 0.000 description 1
- 125000001309 chloro group Chemical group Cl* 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 229910001431 copper ion Inorganic materials 0.000 description 1
- AYWHENVLARCQQQ-UHFFFAOYSA-N copper;1h-pyrrole Chemical compound [Cu].C=1C=CNC=1 AYWHENVLARCQQQ-UHFFFAOYSA-N 0.000 description 1
- 238000002425 crystallisation Methods 0.000 description 1
- 230000008025 crystallization Effects 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000011049 filling Methods 0.000 description 1
- 239000008235 industrial water Substances 0.000 description 1
- 230000002401 inhibitory effect Effects 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000001953 recrystallisation Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 238000010561 standard procedure Methods 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 230000001954 sterilising effect Effects 0.000 description 1
- 230000035882 stress Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000004381 surface treatment Methods 0.000 description 1
- 230000002195 synergetic effect Effects 0.000 description 1
- 230000008646 thermal stress Effects 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
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Abstract
本发明公开了一种含苯并咪唑高温铜缓蚀剂，特别涉及用于高温循环冷却水系统中的铜缓蚀剂。它由苯并咪唑(BI)、苯并三氮唑(BTA)、巯基苯并噻唑(MBT)、甲基苯并三氮唑(TTA)的混合物、氢氧化钠(NaOH)和水(H2O)组成。经实践证明，该种铜缓蚀剂的投用不仅在低温下对铜有极好的缓蚀作用，而且避开了纯BTA型唑类缓蚀剂在高温下易升华的问题，保证了此种铜缓蚀剂在高温下也同样有良好的缓蚀阻垢效果。本发明的含苯并咪唑高温铜缓蚀剂对环境无危害，当活性成分的投药量为1~2mg/L时，对高温体系中铜的腐蚀率小于0.001mm/a，是一种高效环保型高温铜缓蚀剂。
The invention discloses a benzimidazole-containing high-temperature copper corrosion inhibitor, in particular to a copper corrosion inhibitor used in a high-temperature circulating cooling water system. It consists of a mixture of benzimidazole (BI), benzotriazole (BTA), mercaptobenzothiazole (MBT), tolylbenzotriazole (TTA), sodium hydroxide (NaOH) and water (H 2 O) Composition. Practice has proved that the use of this copper corrosion inhibitor not only has an excellent corrosion inhibition effect on copper at low temperatures, but also avoids the problem of easy sublimation of pure BTA-type azole corrosion inhibitors at high temperatures, ensuring this This kind of copper corrosion inhibitor also has good corrosion and scale inhibition effect at high temperature. The benzimidazole-containing high-temperature copper corrosion inhibitor of the present invention has no harm to the environment, and when the dosage of the active ingredient is 1-2mg/L, the corrosion rate of copper in the high-temperature system is less than 0.001mm/a, which is an efficient and environmentally friendly Type high temperature copper corrosion inhibitor.
Description
Technical field
The present invention relates to industrial circulating cooling water and process, be specially adapted to a kind of benzoglyoxaline high temperature copper inhibitor and preparation method thereof that contains of copper material inhibition protection in Steel Plant's continuous cast mold water coolant, steam turbine of thermal power plant inner cold water.
Background technology
Along with the fast development of industrial economy, industrial water consumption sharply rises, and water coolant is the rich and influential family in process water, accounts for more than 80% of process water total amount.Therefore, how saving process water, accomplish that when using recirculated cooling water energy-saving consumption-reducing, water-saving and emission-reducing are protection of the environment, the basic demand that reduces costs, is also the primary goal that China realizes Sustainable development.
Continuous caster is the nucleus equipments of Steel Plant for continuous casting steel machine, and crystallizer is continuous caster " heart ", is the bottomless ingot mold for Forced water cooling.During work, the crystallizer inwall is bearing the static pressure of high-temperature molten steel and the mechanical stress produced with the frictional force of base shell relative movement etc. and the comprehensive action of thermal stresses, and its working conditions is very severe.In order to obtain qualified strand, crystallizer should meet that thermal conductivity is good, recrystallization temperature is high, thermal fatigue resistance, the primary conditions such as intensity is high, wear resistance good, long service life, therefore the only selection that the copper material that meets above-mentioned condition is crystallization continuous casting device, the inhibition of copper material has also become to prevent bleed-out, guarantees the important process link of the normal stably condensation shaping ejection of steel.Equally, in the process of generator generating, stator and rotor can produce a large amount of heats, must through the hollow copper conductor, constantly take away heat with heat-eliminating medium, reduce as much as possible the temperature of generator key position, once copper conductor is corroded, just likely cause the Serious Accidents such as burn-down of electric motor blast, loss is greatly.Visible, the inhibition problem that solves copper material under the high temperature system has become the task of top priority in recirculated cooling water field.
In recent years, take the azole compounds that benzotriazole is representative is often used as the copper inhibitor in industrial circulating cooling water.Chinese patent: (CN101974760A) disclose a kind of oxidization-resistant copper corrosion inhibitor for recirculating cooling water system; this inhibiter effective constituent is by a kind of or compositions of mixtures of benzotriazole, methyl benzotriazazole and mercaptobenzothiazole; reduce the decomposition of chlorine residue to organophosphate and polymer antisludging agent when can be protected the copper product in the recirculating cooling water system that uses chloride sterilant; improve the sterilizing ability of circulating water system, thereby reduce the processing costs of circular water treating system and improve treatment effect.Chinese patent: the preparation and the surface treatment method that (CN102206826A) disclose the multiple matching type copper inhibitor mainly formed by benzotriazole, 2-mercaptobenzothiazole.Described inhibiter is due to benzotriazole, methyl benzotriazazole and the mercaptobenzothiazole film forming speed is fast, corrosion mitigating effect good, can effectively avoid the generation of the corrosion products such as copper material surface ventilation breather under higher concentration.But their sublimation temperature is lower (as the sublimation temperature of BTA is 95 ℃) all, easy desorption when the wall temperature of interchanger is higher and reduce corrosion mitigating effect therefore only uses the azole compounds of above-mentioned routine unsatisfactory as the corrosion mitigating effect of copper inhibitor in high-temperature systems.In this case, be badly in need of the copper inhibitor that a kind of chemical stability is good, high temperature resistant, certain threshold effect is arranged and have good synergistic effect with other medicament.
Summary of the invention
The object of the present invention is to provide a kind of industrial circulating cooling water that is applicable to, especially under the high temperature system containing benzoglyoxaline high temperature copper inhibitor and application thereof.This kind of copper inhibitor has the corrosion inhibiting ability of good thermostability, excellence, and cost is lower, environmentally friendly.
The technical solution that realizes the object of the invention is:
A kind of containing benzoglyoxaline high temperature copper inhibitor, described inhibiter is by benzimidazoles compound (BI), benzotriazole (BTA), mercaptobenzothiazole (MBT), methyl benzotriazazole (TTA), sodium hydroxide (NaOH) and water (H
2o) form, each constituent mass mark is: benzimidazoles compound 2% ~ 3%, benzotriazole 1% ~ 1.5%, mercaptobenzothiazole 0.5% ~ 0.7%, methyl benzotriazazole 0.5% ~ 0.7%, sodium hydroxide 1% ~ 2%, surplus are deionized water.
Wherein, benzimidazoles compound is selected one or more the mixture in 1-tolimidazole, 2-tolimidazole and 2-Phenylbenzimidazole.The preferred 2-Phenylbenzimidazole of benzoglyoxaline.
The above-mentioned preparation method containing benzoglyoxaline high temperature copper inhibitor, comprise the following steps: first sodium hydroxide is added to the water, again above-mentioned azole compounds (benzimidazoles compound (BI), benzotriazole (BTA), mercaptobenzothiazole (MBT), methyl benzotriazazole (TTA)) is at room temperature slowly stirred and adds wherein in proportion, continue to stir 1 ~ 2 hour, obtain containing benzoglyoxaline high temperature copper inhibitor when solution is clarified without insoluble impurities;
Each constituent mass mark is: benzimidazoles compound 2% ~ 3%, benzotriazole 1% ~ 1.5%, mercaptobenzothiazole 0.5% ~ 0.7%, methyl benzotriazazole 0.5% ~ 0.7%, sodium hydroxide 1% ~ 2%, surplus are deionized water.
In the system of its sublimation temperature below 95 ℃, film forming speed is fast, corrosion mitigating effect good for BTA, but in the system of comparatively high temps easy desorption and reduce corrosion mitigating effect; Although MBT and TTA film forming speed are slightly slow, sublimation temperature is higher, is difficult for desorption after film forming; Main component BI has fabulous thermostability, even also can good protection effect be arranged to copper product under the high temperature system of 350 ℃.
The present invention compared with prior art, its remarkable advantage is: (1) is of the present invention containing benzoglyoxaline high temperature copper inhibitor, at high temperature the corrosion mitigating effect of copper material is better than to common azole copper inhibitor, even under the high temperature system of 350 ℃, still can reaches more than 99% to the corrosion inhibition rate of copper; (2) of the present invention containing benzoglyoxaline high temperature copper inhibitor, because raw material sources are extensive, preparation technology is simple, and cost is low, does not increase the user equipment investment.
Below in conjunction with accompanying drawing, the present invention is described in further detail.
The accompanying drawing explanation
In Fig. 1 embodiment of the present invention 6, system adds the corrosion rate (black) of formula before 8 to I type red copper standard corrosion coupon and the corrosion rate (white) after dosing varies with temperature diagram under high temperature (150 ± 5 ~ 350 ± 5 ℃).
In Fig. 2 embodiment of the present invention 7, system adds respectively corrosion rate (black) and the corrosion rate (white) dosing after of formula before 8 to I type red copper, brass, copper-nickel alloy standard corrosion coupon and illustrates under 350 ± 5 ℃.
Embodiment
below in conjunction with specific embodiment, composition and the effect containing benzoglyoxaline high temperature copper inhibitor of the present invention is described further.
Preparation method containing benzoglyoxaline high temperature copper inhibitor, comprise the following steps: first sodium hydroxide is added to the water, again benzimidazoles compound (BI), benzotriazole (BTA), mercaptobenzothiazole (MBT), methyl benzotriazazole (TTA) are at room temperature slowly stirred and add wherein in proportion, continue to stir 1 ~ 2 hour, obtain containing benzoglyoxaline high temperature copper inhibitor when solution is clarified without insoluble impurities.
The inhibiter that uses forms as shown in table 1, and the experiment of using moisturizing water-quality guideline used is as shown in table 2.
Composition containing benzoglyoxaline high temperature copper inhibitor used in table 1 embodiment
| Formula | BI | BTA | MBT | TTA | NaOH | H 20 |
| 1 | 2.0% | 1.0% | 0.5% | 0.5% | 1.0% | 95.0% |
| 2 | 2.5% | 1.0% | 0.5% | 0.5% | 1.0% | 94.5% |
| 3 | 2.0% | 1.5% | 0.5% | 0.5% | 1.0% | 94.5% |
| 4 | 2.5% | 1.5% | 0.5% | 0.5% | 1.0% | 94.0% |
| 5 | 3.0% | 1.0% | 0.6% | 0.6% | 1.0% | 93.8% |
| 6 | 3.0% | 1.0% | 0.7% | 0.7% | 1.0% | 93.6% |
| 7 | 3.0% | 1.5% | 0.6% | 0.6% | 1.0% | 93.3% |
| 8 | 3.0% | 1.5% | 0.7% | 0.7% | 1.0% | 93.1% |
The moisturizing water quality that table 2 experiment is used
| The water sample source | Three 2# of the steel mill continuous casting system moisturizings of Ma Gang company |
| pH | 7.5 |
| Calcium ion/(with CaCO 3Meter mg/L) | <5mg/L |
| Cl -/ (mg/L) | 10mg/L |
| Total alkalinity/(mmol/L) | 1.2 |
| Total hardness/(mmol/L) | 0.5 |
| Specific conductivity/(μ scm -1) | 205 |
By specification, be 50mm * 25mm * 2mm, surface-area is 28cm
2i type brass, red copper or copper-nickel alloy standard corrosion coupon hang on the titanium steel autoclave kettle cover below that useful volume is about 500mL, fill with the moisturizing shown in table 2 in still, guarantee that kettle cover covers tightly the rear water surface and can not have the copper test piece.Add the composite corrosion inhibitor in table 1, in the warranty test water sample, the effective content of azole compounds is 2mg/L, after sealing, is placed in the constant temperature oven of assigned temperature, takes out to roll every 1 hour and stirs 1min, after 72h, takes out and is cooled to room temperature.Moisturizing in still is taken out, calculate the copper ion concentration in moisturizing after processing by standard method and obtain in the namely copper test piece of cupric ion total amount in moisturizing with this quality partly that is corroded.Carry out blank test by same method, in conjunction with both test-results, calculate corrosion inhibition rate.
embodiment 1choose formula 1, test the corrosion mitigating effect of its (150 ± 5 ℃, 200 ± 5 ℃, 250 ± 5 ℃, 300 ± 5 ℃, 350 ± 5 ℃) I type red copper standard corrosion coupon at high temperature, result is as shown in the table:
| Temperature (℃) | Blank corrosion rate (mm/a) | Dosing post-etching rate (mm/a) |
| 150±5℃ | 0.0228 | 0.0016 |
| 200±5℃ | 0.0255 | 0.0019 |
| 250±5℃ | 0.0287 | 0.0020 |
| 300±5℃ | 0.0301 | 0.0024 |
| 350±5℃ | 0.0320 | 0.0027 |
embodiment 2choose formula 1, test it to the corrosion mitigating effect at 350 ± 5 ℃ of lower I type red coppers, brass, copper-nickel alloy standard corrosion coupon, result is as shown in the table:
| Copper material | Blank corrosion rate (mm/a) | Dosing post-etching rate (mm/a) |
| Red copper | 0.0320 | 0.0027 |
| Brass | 0.0329 | 0.0023 |
| Copper-nickel alloy | 0.0331 | 0.0029 |
embodiment 3choose formula 4, test the corrosion mitigating effect of its (150 ± 5 ℃, 200 ± 5 ℃, 250 ± 5 ℃, 300 ± 5 ℃, 350 ± 5 ℃) I type red copper standard corrosion coupon at high temperature, result is as shown in the table:
| Temperature (℃) | Blank corrosion rate (mm/a) | Dosing post-etching rate (mm/a) |
| 150±5℃ | 0.0228 | 0.0015 |
| 200±5℃ | 0.0255 | 0.0017 |
| 250±5℃ | 0.0287 | 0.0018 |
| 300±5℃ | 0.0301 | 0.0021 |
| 350±5℃ | 0.0320 | 0.0026 |
| Temperature (℃) | Blank corrosion rate (mm/a) | Dosing post-etching rate (mm/a) |
| 150±5℃ | 0.0228 | 0.0014 |
| 200±5℃ | 0.0255 | 0.0016 |
| 250±5℃ | 0.0287 | 0.0018 |
| 300±5℃ | 0.0301 | 0.0021 |
| 350±5℃ | 0.0320 | 0.0025 |
| Copper material | Blank corrosion rate (mm/a) | Dosing post-etching rate (mm/a) |
| Red copper | 0.0320 | 0.0025 |
| Brass | 0.0329 | 0.0022 |
| Copper-nickel alloy | 0.0331 | 0.0027 |
embodiment 6choose formula 8, test the corrosion mitigating effect of its (150 ± 5 ℃, 200 ± 5 ℃, 250 ± 5 ℃, 300 ± 5 ℃, 350 ± 5 ℃) I type red copper standard corrosion coupon at high temperature, result is as shown in the table:
| Temperature (℃) | Blank corrosion rate (mm/a) | Dosing post-etching rate (mm/a) |
| 150±5℃ | 0.0228 | 0.0014 |
| 200±5℃ | 0.0255 | 0.0015 |
| 250±5℃ | 0.0287 | 0.0017 |
| 300±5℃ | 0.0301 | 0.0019 |
| 350±5℃ | 0.0320 | 0.0022 |
As shown in Figure 1, along with system temperature is increased to 350 ± 5 ℃, the corrosion mitigating effect of medicament slightly reduces, but fill a prescription, 8 still can keep that copper material is had to good corrosion mitigating effect.
embodiment 7choose formula 8, test it to the corrosion mitigating effect at 350 ± 5 ℃ of lower I type red coppers, brass, copper-nickel alloy standard corrosion coupon, result is as shown in the table:
| Copper material | Blank corrosion rate (mm/a) | Dosing post-etching rate (mm/a) |
| Red copper | 0.0320 | 0.0022 |
| Brass | 0.0329 | 0.0019 |
| Copper-nickel alloy | 0.0331 | 0.0024 |
As shown in Figure 2, for different copper materials, 8 the corrosion mitigating effect of filling a prescription can be slightly different, comprehensively it seems, formula of the present invention is best to the corrosion mitigating effect of brass, slightly is better than red copper and copper-nickel alloy.
embodiment 8above-mentioned formula 8 is applied to three steel mills 2 of Ma'anshan Iron and Steel Corp
#continuous casting system, moisturizing water quality is as table 2, and recirculated water concentration rate 1.2 ~ 1.5, compare as table 3 with other scheme treatment effect.
Three steel mills 2 of table 3 Ma Gang company
#treatment effect synopsis when continuous casting system recirculated water adds different inhibiter
| No | Time | The inhibiter main component | The inhibiter cost | The crystallizer life-span |
| 1 | 2007.02~2010.08 | BTA+TTA+MBT | ~ 3 ten thousand yuan/month | 50 ~ 200 stoves |
| 2 | 2010.09~2010.12 | NaMoO 4+BTA | ~ 30 ten thousand yuan/month | 50 ~ 250 stoves |
| 3 | 2011.01~2013.06 | BI+BTA+MBT+TTA | ~ 5 ten thousand yuan/month | 300 ~ 600 stoves |
Result shows, benzoglyoxaline type high temp copper inhibitor of the present invention is no more than 0.0027mm/a to the corrosion rate of copper material under 350 ± 5 ℃ of systems, and corrosion inhibition rate all can reach more than 99.73%.
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| US10190222B2 (en) | 2015-05-28 | 2019-01-29 | Ecolab Usa Inc. | Corrosion inhibitors |
| US10519116B2 (en) | 2015-05-28 | 2019-12-31 | Ecolab Usa Inc. | Water-soluble pyrazole derivatives as corrosion inhibitors |
| US10669637B2 (en) | 2015-05-28 | 2020-06-02 | Ecolab Usa Inc. | Purine-based corrosion inhibitors |
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| US11306400B2 (en) | 2015-05-28 | 2022-04-19 | Ecolab Usa Inc. | 2-substituted imidazole and benzimidazole corrosion inhibitors |
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| CN115491679A (en) * | 2022-10-15 | 2022-12-20 | 厦门竞高电镀有限公司 | Environment-friendly copper anti-blushing agent and preparation thereof |
| CN115491679B (en) * | 2022-10-15 | 2024-04-02 | 厦门竞高电镀有限公司 | Environment-friendly copper anti-discoloration agent and preparation thereof |
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