一种酸化曼尼希碱季铵盐缓蚀剂的合成及性能研究

以丙烯酸羟乙酯、乙酰氯、甲醛、二乙醇胺为主要原料,通过Mannich反应合成曼尼希碱,曼尼希碱再与氯化苄反应进行季铵化,得到曼尼希碱季铵盐缓蚀剂。通过红外光谱对产物结构进行了表征;采用静态挂片失重法、电化学方法和电镜扫描法考察了该缓蚀剂的缓蚀性能。结果表明:该缓蚀剂是以抑制阳极为主的混合型吸附成膜缓蚀剂;在缓蚀剂质量分数为0.9%,腐蚀介质盐酸质量分数为20%,腐蚀温度为90℃,腐蚀时间为12 h及常压条件下,对N80钢的缓蚀率达到96.2%,能有效抑制盐酸对N80钢的腐蚀。     

由喹啉季铵盐和有机胺合成的缓蚀剂的缓蚀原理

９５－０３５由喹啉季铵盐和有机胺合成的缓蚀剂的缓蚀原理一种新型酸性介质缓蚀剂是由喹啉季铵盐和有机胺合成的，具有良好的热稳定性和耐盐酸性。根据极化曲线和吸附理论，论述了缓蚀剂的保护机理。由于Ｃｌ￣－（来自盐酸）和有机阳离子（来自缓蚀剂）被吸附在金属表面...     

新型缓蚀剂的制备及其性能研究

以水合肼、邻羟基苯甲醛为原料合成一种新型席夫碱酸化缓蚀剂。运用失重法和电化学法研究了该缓蚀剂在盐酸溶液中对碳钢的缓蚀行为。试验结果表明:缓蚀剂对盐酸介质中的N80钢片有明显的缓蚀作用,缓蚀剂的加入提高了腐蚀反应的活化能。电化学测试表明其是一种以抑制阳极为主的混合型缓蚀剂。     

一种季铵盐型酸化缓蚀剂的合成及性能评价

以乌洛托品、氯化苄和含氮芳香族化合物为原料,合成一种季铵盐型酸化缓蚀剂YT101,采用失重法和电化学方法评价了其在中、低温盐酸中的缓蚀性能,探讨了其缓蚀机理,并与国内几种常见的缓蚀剂进行对比。结果表明,YT101是以阴极抑制为主的混合抑制性缓蚀剂,主要组成为:乌洛托品和氯化苄的反应产物,氯化苄和含氮芳香族化合物的反应产物,两种组分联合作用于金属表面形成多层致密的有机保护膜,有效地抑制了盐酸对N80钢的腐蚀,同时,YT101与炔醇类缓蚀剂(PA)有着很好的配伍性,少量炔醇的加入,可以大幅提高其缓蚀效果。此外,YT101还具有酸溶性好、毒性低、合成工艺简单(一步反应)等优点,有着良好的应用前景。     

耐高温缓蚀剂的制备及缓蚀性能研究

以喹啉和氯化苄为原料,以1:1:1摩尔比合成喹啉季铵盐。喹啉季铵盐用作高温腐蚀缓蚀剂的主要成分,与表面活性剂和腐蚀缓蚀剂等合成配比制成炔丙基酮缓蚀剂。通过高温静态失重法测试腐蚀缓蚀剂样品的腐蚀缓蚀效果。通过一系列合成条件和试验研究了腐蚀缓蚀剂的最佳合成条件。同时,通过对照试验和单因素试验研究了防腐剂的最佳配方,得出的结论是腐蚀缓蚀剂的最佳合成条件的反应温度为150℃,反应时间5h。腐蚀缓蚀剂使得表面活性剂的效果提高,即喹啉季铵盐的效果:丙炔基醇:甲酸:OP-10=63:25:6:6。在这些条件下,样品的腐蚀速率为44.5 g/m~2h,达到了更好的腐蚀缓蚀效果。     

双喹啉季铵盐在盐酸体系中的缓蚀性能及协同增效作用研究

采用静态失重法评价了一种双喹啉季铵盐QAD在盐酸体系中对N80钢的缓蚀性能,研究了丙炔醇对主缓蚀剂QAD的协同效应和非离子表面活性剂OP-10的增效作用,得到一种新型高效的复合缓蚀剂QBP-1。通过动电位极化扫描和交流阻抗测定研究了QBP-1在盐酸酸化体系中的电化学行为。     

含氮杂环季铵盐离子液体缓蚀剂的合成及其性能研究

以苯甲胺、环氧氯丙烷、1-溴代十二烷、喹啉为原料,通过开环反应和季铵化反应合成了1-(3-(苄基氨基)-2-羟丙基)喹啉-1-氯化铵(BZ-1-KL)以及1-(3-(苄基(十二烷基)氨基)-2-羟丙基)喹啉-1-氯化铵(BZ-N-KL) 2种季铵盐型缓蚀剂。利用红外光谱对产物进行了结构表征,并通过静态挂片失重法和电化学分析法对其缓蚀效果进行评价。当温度为60℃、BZ-1-KL和BZ-N-KL质量分数为1. 0%时,对P110的缓蚀率分别为93. 10%、93. 51%,且均符合Langmuir单分子层等温吸附。量子化学计算结果表明,2种缓蚀剂的能隙差较小,主要通过苯环、喹啉等与铁形成稳定的配位键达到缓蚀效果。     

曼尼希碱型盐酸酸化缓蚀剂的合成及性能研究

以苯胺、甲醛、乙酰丙酮为原料,通过Mannich反应合成一种新型曼尼希碱。结果表明,新型曼尼希碱的最佳条件为:苯胺∶甲醛∶乙酰丙酮的物质的量配比为1∶1∶1,反应温度为80℃、盐酸加入量为0.02 mol、反应时间为6 h。分别采用失重法和电化学方法研究了曼尼希碱缓蚀剂的缓蚀性能,在25℃,1 mol/L的盐酸溶液中,对碳钢的缓蚀率达92.3%以上。对其缓蚀机理进行了初步的探讨,认为合成的新型曼尼希碱是以抑制阳极为主的混合型缓蚀剂。     

硫脲基松香咪唑啉季铵盐 的合成、性能及缓蚀机理

以松香、二乙烯三胺、3-氯-2-羟基丙烷磺酸钠和硫脲为主剂合成了硫脲基松香咪唑啉季铵盐,对其结构进行了红外和核磁(~(13)CNMR)表征。通过静态失重法和电化学方法考察了硫脲基松香咪唑啉季铵盐在酸性介质中的缓蚀性能,结合成膜理论以及缓蚀剂的分子结构,对自制缓蚀剂的缓蚀机理做出了解释。结果表明:303 K下,在质量分数为15%的盐酸介质中加入占盐酸质量0.4%的硫脲基松香咪唑啉季铵盐,其缓蚀率可达90.81%;自制缓蚀剂吸附在碳钢表面形成吸附膜,从而起到缓蚀作用。     

芳基咪唑啉季铵盐缓蚀剂的制备及其性能研究

以苯甲酸、二乙烯三胺和氯化苄为原料,合成了一种芳基咪唑啉季铵盐缓蚀剂。利用静态失重法和极化曲线法测定缓蚀剂对X80管线钢在含饱和CO2的模拟油田采出水溶液中的缓蚀作用。结果表明,实验得到了芳基咪唑啉季铵盐,温度和缓蚀剂用量对缓蚀性能影响显著,极化曲线表明该缓蚀剂是一种在较低浓度下以抑制阴极反应为主而在较高浓度下以抑制阳极反应为主的混合型缓蚀剂。     

Inhibiting and accelerating effects of some quinolines on the corrosion of zinc and some binary zinc alloys in HCl solution

The effect of quinoline, benzo(f)quinoline and 8-hydroxyquinoline on the electrochemical and corrosion behaviour of zinc, Zn-2% Cd and Zn-2% Pb alloys in deaerated 0.1m HCl solution was studied using the potentiostatic technique. Although quinoline inhibited the corrosion of zinc at all examined concentrations, it accelerated the corrosion of the alloys. As an inhibitor, quinoline was found to have a predominant anodic effect and its adsorption conformed with the Temkin isotherm. At concentrations >10^–4 m, benzo(f)quinoline inhibited the corrosion of both zinc and the alloys. Inhibition was found to be predominantly anodic without changing the mechanism of zinc dissolution. Inhibition by 8-hydroxy quinoline was found to be purely anodic occurring by surface chelation, resulting in a change of the mechanism of zinc dissolution.     

Microencapsulation of quinoline as a corrosion inhibitor in polyurea microcapsules for application in anticorrosive PU coatings

The use of reservoirs containing corrosion inhibitors as active substances for corrosion protection is an issue of great interest in the scientific literature. The aim of the present study is to encapsulate quinoline, a corrosion inhibitor, into a micro-reservoir to overcome disadvantages caused by its direct addition into a coating layer. Quinoline incorporated microcapsules with different core solvents were synthesized at room temperature by an interfacial polymerization method. The morphologies, wall structures, particle size and thermal properties of the synthesized microcapsules were investigated. The release study of core material was carried out by loss on drying and UV spectrophotometric methods. The prepared quinoline based microcapsules were incorporated in polyurethane (PU) coatings to study their effect on corrosion of substrate. The anticorrosive performance of coatings loaded with different weight % of microcapsules containing quinoline was tested by immersion of the PU coated mild steel specimens in 5 wt% HCl solution by visual observation and weight loss measurements.     

盐类浓度对油酸咪唑啉季铵盐缓蚀率的影响

针对油田污水富含钙、镁、钠等盐类的现状,合成了油酸咪唑啉季铵盐,采用电化学极化法和静态失重法测试了其缓蚀性能,并采用电化学极化法考察了强酸腐蚀介质中氯化钙、氯化镁及氯化钠3种盐的浓度对该缓蚀剂缓蚀率的影响。结果表明:该缓蚀剂是一种以阳极抑制为主的混合型缓蚀剂;在1mol·L-1 HCl溶液中,当缓蚀剂浓度为5mg·L-1时,N80钢片的腐蚀速率和缓蚀剂的缓蚀率趋于稳定;随着介质中盐类浓度的增大,缓蚀剂的缓蚀率逐渐减小。分析认为,缓蚀率减小的原因可能是由于介质的电导率增大,导致腐蚀速率加快。     

Electrochemical frequency modulation as a new technique for monitoring corrosion inhibition of iron in acid media by new thiourea derivative

The electrochemical frequency modulation EFM technique provides a new tool for electrochemical corrosion monitoring. EFM is a non-destructive technique as electrochemical impedance spectroscopy (EIS). EFM technique was used in comparison with the traditional dc and ac techniques. Results obtained by EFM technique were shown to be in agreement with other electrochemical techniques. With EFM technique, a corrosion rate can be obtained instantaneously in very short time which makes this technique ideal in online corrosion monitoring. New synthesized thiourea derivative named 1,3-diarylidenethiourea (DAT) was examined as a new corrosion inhibitor for iron in 1 M hydrochloric acid solution.     

盐酸介质中氯化苄基喹啉铵的缓蚀性能及电化学行为研究

合成了氯化苄基喹啉铵(QA),评价了其在盐酸介质中对N80钢的缓蚀性能,分别探讨了丙炔醇(BCC)和JHC-2对QA的协同效应,研究了非离子表面活性剂OP-10对二元复配缓蚀剂体系的增效作用,通过极化曲线和电化学阻抗实验研究了盐酸介质中QA的电化学行为。结果表明:盐酸介质中QA对N80钢的缓蚀作用明显,用量为200mg·L-1时对N80钢的缓蚀率达到93%以上;BCC、JHC-2对QA的缓蚀性能具有协同效应,最佳配比(mg·L-1)QA∶BCC(JHC-2)为150∶50;非离子表面活性剂OP-10对二元复配缓蚀剂体系有明显增效作用,最佳配比(mg·L-1)QA∶BCC(JHC-2)∶OP-10为150∶50∶20。     

Inhibition Effects of a Synthesized Novel 4-Aminoantipyrine Derivative on the Corrosion of Mild Steel in Hydrochloric Acid Solution together with Quantum Chemical Studies

1,5-Dimethyl-4-((2-methylbenzylidene)amino)-2-phenyl-1H-pyrazol-3(2H)-one (DMPO) was synthesized to be evaluated as a corrosion inhibitor. The corrosion inhibitory effects of DMPO on mild steel in 1.0 M HCl were investigated using electrochemical impedance spectroscopy (EIS), potentiodynamic polarization, open circuit potential (OCP) and electrochemical frequency modulation (EFM). The results showed that DMPO inhibited mild steel corrosion in acid solution and indicated that the inhibition efficiency increased with increasing inhibitor concentration. Changes in the impedance parameters suggested an adsorption of DMPO onto the mild steel surface, leading to the formation of protective films. The novel synthesized corrosion inhibitor was characterized using UV-Vis, FT-IR and NMR spectral analyses. Electronic properties such as highest occupied molecular orbital energy, lowest unoccupied molecular orbital energy (EHOMO and ELUMO, respectively) and dipole moment (μ) were calculated and discussed. The results showed that the corrosion inhibition efficiency increased with an increase in the EHOMO values but with a decrease in the ELUMO value.     

Starch-AA-CS三元共聚物对酸溶液中碳钢的缓蚀作用

以淀粉（Starch）、丙烯酸（AA）和壳聚糖（CS）为原料合成三元共聚物（SAAC）。利用红外光谱（FT-IR）和X射线衍射（XRD）进行结构表征,并通过电化学方法、失量法、扫描电子显微镜（SEM）和能谱仪（EDS）研究SAAC在1 mol·L^-1 HCl环境下对Q235碳钢的缓蚀作用及机理。结果显示,SAAC是一种混合型缓蚀剂,30℃时,200 mg·L^-1的SAAC的缓蚀率可达90.1%。通过Gibbs自由能和Tafel曲线可知,SAAC在Q235碳钢表面的吸附符合Langmuir吸附等温式,同时存在物理吸附与化学吸附。SAAC合成原料经济、环保,合成条件温和,是一种具有广泛应用前景的绿色环保型缓蚀剂。     

双咪唑啉缓蚀剂抑制油田CO_2腐蚀的性能研究

以葵二酸、三乙烯四胺和氯化苄为原料,合成了双咪唑啉缓蚀剂。通过电化学阻抗法,研究了双咪唑啉缓蚀剂在饱和CO_2油田采出水介质中对J55油管钢的缓蚀性能,并对两口CO_2腐蚀严重的油井进行了现场加注试验。结果表明,双咪唑啉缓蚀剂在油田水介质中抑制CO_2腐蚀性能优异:加入缓蚀剂后可使电荷传递电阻大幅增加,在缓蚀剂浓度为150ml/L时,缓蚀率可达96.3%;两口试验井加注缓蚀剂后,腐蚀速率大幅下降,缓蚀率可达85%以上,现场使用效果优异。     

A Corrosion Inhibition Study of a Novel Synthesized Gemini Nonionic Surfactant for Carbon Steel in 1 M HCl Solution

In this study, a gemini nonionic surfactant was synthesized as a corrosion inhibitor for carbon steel in 1 M HCl. Surface properties of the synthesized gemini nonionic surfactant were determined by using surface tension. The results showed that the gemini nonionic surfactant has good surface active properties. The corrosion inhibition effect of the synthesized inhibitor on carbon steel was evaluated by using electrochemical impedance spectroscopy (EIS), potentiodynamic polarization and weight loss methods. The characterization of the film formed on the steel surface was carried out by scanning electron microscope (SEM) methods. The inhibitor molecules were adsorbed physically onto a carbon steel surface according to the Langmuir adsorption isotherm. The results revealed that the inhibitor acted as a mixed-type inhibitor. It was found that the inhibition efficiency increases with an increase in inhibitor concentration and decreases with increasing temperature. Thermodynamic parameters were calculated to elucidate the inhibitive mechanism.