3%NaCl溶液中咪唑和苯并三唑对Cu缓蚀协同作用的研究

采用失重法考察了3%NaCl溶液中咪唑和苯并三唑对Cu 的缓蚀作用,结果表明100 mg/L的咪唑对Cu的缓蚀率仅为477%,100 mg/L的苯并三唑对Cu 的缓蚀效率为732%,当70 mg/L的咪唑和30 mg/L的苯并三唑复配使用后,其缓蚀效率提高 到943%,电化学极化曲线研究表明苯并三唑对Cu电极的阳极过程有抑制作用,咪唑对Cu电 极的阴极过程有抑制作用,咪唑和苯并三唑的复配使用显著增加了对Cu电极阴极和阳极电化 学过程的抑制作用.     

双苯并三唑Mannich碱在5% NaHCO_3溶液中对Cu的缓蚀作用

以苯并三唑(BTA)为母体合成了两种双苯并三唑Mannich碱1,2-双([1,2,3]苯并三唑)-1,2-二苯基氨基乙烷(BBTAP)和1,2-双([1,2,3]苯并三唑)-1,2-二甲基氨基乙烷(BBTAM)。采用静态失重法、极化曲线和电化学阻抗谱(EIS)研究了BBTAP、BBTAM和BTA在5 mass%NaHCO_3水溶液中的缓蚀性能和吸附行为。结果表明:在较高温度下,三种化合物在5%NaHCO_3溶液中对Cu均有较好的缓蚀作用。与BTA相比,BBTAP和BBTAM具有用量少,缓蚀效率高的特点。三种化合物在铜表面上的吸附过程均为放热过程,在铜表面上的吸附行为服从Langmuir吸附等温式,属于物理-化学混合吸附。     

NaCl溶液中烷基咪唑对铜的缓蚀作用研究

采用电化学方法考察了3％NaCl溶液中2－正十一烷基咪唑对Cu的缓蚀作用，结果表明烷基咪唑对Cu电极的阴，阳极电化学过程均有明显的抑制作用，随着烷基咪唑浓度的增加，分子聚集体的形成，导致烷基咪唑在电极表面吸附程度的降低，其缓蚀能力有所下降。     

盐酸介质中苯并三氮唑衍生物的缓蚀机理研究

利用微波促进合成了5种苯并三氮唑衍生物,利用失重法和电化学方法研究了其在50℃、5%盐酸中对N80钢的缓蚀效果,并利用电化学方法重点讨论了吗啉甲基苯三唑的缓蚀行为.结果表明,合成的5种衍生物对实验条件下的N80钢有较好的缓蚀效果,属于吸附型缓蚀剂;吗啉甲基苯三唑为混合控制型缓蚀剂,其对N80钢的缓蚀作用属于几何覆盖效应,符合Langmuir吸附等温式. 页     

盐酸介质中1-丙基-2-甲基-3-烷基苯并咪唑盐对Q235钢的缓蚀作用

合成了不同烷基链长的1-丙基-2-甲基-3-烷基苯并咪唑盐,通过动电位极化曲线、电化学阻抗谱和扫描电镜等方法研究其对Q235钢在1 mol/LHCl中的缓蚀作用。结果表明,1-丙基-2-甲基-3-烷基苯并咪唑盐对Q235钢在盐酸溶液中具有优异的缓蚀性能,其中1-丙基-2-甲基-3-十四烷基苯并咪唑盐的缓蚀性能最好,当浓度达到10mg/L时缓蚀率达98.6%,是以阴极型为主的混合型缓蚀剂。     

苯并三氮唑对BFe30—11在单相及含砂人工海水中冲刷腐蚀的抑制作用

采用旋转圆筒式冲刷装置通过多种电化学测试及失重测量研究了苯并三氮唑对ＢＦｅ３０－１－１在单相及含砂人工海水中冲刷腐蚀的抑制作用。结果表明,ＢＴＡ可有效抑制ＢＦｅ３０－１－１在单相及含砂人工海水中冲腐蚀的阴,阳极反应,属几何覆盖型缓蚀剂,其只附满足Ｌａｎｇｍｉｕｒ等温式。ＢＴＡ在单相流动海水中比静态下缓蚀作用更强,但流速较高时,ＢＴＡ缓蚀作用下降;在含砂人工海水中,ＢＴＡ缓蚀作用随砂含量的增加而降低     

HCl溶液中氨基酸类化合物对铜的缓蚀作用

采用失重法、电化学极化曲线和电化学阻抗谱比较了0.5 mol/L HCl溶液中传统缓蚀剂苯并三唑(BTA)和辛酰谷氨酸、DL-苏氨酸、DL-丝氨酸等氨基酸类物质对铜的缓蚀作用。挂片试验和阻抗谱表明,10-3mol/L的辛酰谷氨酸对铜的缓蚀作用最好,缓蚀率可以达到82.7%。从电化学极化曲线来看,这几种氨基酸类缓蚀剂均是阴极型缓蚀剂。在浓度10-5~10-3mol/L范围内随着辛酸谷氨酸浓度升高缓蚀效果加强。     

钨酸盐与苯并三唑对X70钢协同缓蚀作用的研究

应用动电位扫描法和电化学阻抗法研究了钨酸盐和苯并三唑(BTA)在氯化钠介质中对X70钢的协同缓蚀作用。结果表明:X70钢在0.03%的NaCl溶液中的腐蚀为混合控制过程。Na2WO4.2H2O和苯并三唑均为阳极型缓蚀剂。在保持缓蚀剂总浓度为2×10-3mol/L时,Na2WO4.2HO∶BTA为1∶1时缓蚀率达最大,为83.01%。     

苯并三氮唑及其甲基衍生物在去离子水中对铜的缓蚀作用

采用电化学和分光光度法研究了苯并三氮唑和甲基苯并三氮唑在去离子水中对紫铜的腐蚀电化学行为的影响和吸附规律。结果表明，当浓度大于5mg/L时，苯并三氮唑和甲基苯并三氮唑均具有较好缓蚀性能，且甲基苯并三氮唑的缓蚀性能优于苯并三氮唑。这两种缓蚀剂属于阳极型缓蚀剂，吸附过程为放热反应，属化学吸附，服从Langmuir吸附等温式。     

高氯油田水溶液中咪唑类缓蚀剂的性能

采用失重试验和电化学方法研究了苯并咪唑及6-硝基苯并咪唑两种缓蚀剂在含氯油田水溶液中对Q235钢的缓蚀作用,并探讨其缓蚀机理,研究了两种缓蚀剂添加量对缓蚀效率的影响。结果表明,苯并咪唑及6-硝基苯并咪唑缓蚀剂都具对Q235钢有明显的缓蚀作用,苯并咪唑缓蚀率随着浓度增大呈现增大趋势,浓度为1.0g/L时缓蚀效果最好,缓蚀率达90.41%;6-硝基苯并咪唑的缓蚀率随着浓度的增大具有极值效应,当浓度为0.5g/L时,最大缓蚀率为84.78%。极化曲线和电化学阻抗谱试验结果与失重法的结果一致,都表明在油田水溶液中苯并咪唑的缓蚀率较6-硝基苯并咪唑高。苯并咪唑的缓蚀效果较6-硝基苯并咪唑更好,且两种缓蚀剂在Q235钢表面的吸附都为自发过程,符合Langmuir吸附等温式。     

MBT、BTA和MBO对铜缓蚀性能的电化学研究

用电化学方法比较研究了２－巯基苯并恶唑（ＭＢＯ），苯并三唑（ＢＴＡ）和２－巯基苯并噻唑（ＭＢＴ）在３％ＮａＣｌ，０．１ｍｏｌ／Ｌ ＨＣｌ和０．５ｍｏｌ／Ｌ ＨＣｌ溶液中对铜的缓蚀性能，在３％ＮａＣｌ溶液中，ＭＢＯ表现出稍优于ＢＴＡ，远高于ＭＢＴ的缓蚀能力；与ＢＴＡ和ＭＢＴ相比，在０．１ｍｏｌ／Ｌ ＨＣｌ和０．５ｍｏｌ／Ｌ ＨＣｌ中，ＭＢＯ对铜的腐蚀有突出的缓蚀效果。     

Corrosion inhibition of copper–phosphorus brazing alloys in tetra‐n‐butylammonium bromide aerated aqueous solution by benzotriazole

The corrosion inhibition behavior of benzotriazole (BTA) on a brazing alloy, CuP in the non‐welded and welded conditions in 17 wt% (0.534 mol/L) tetra‐n‐butylammonium bromide (TBAB) aerated aqueous solution was investigated by potentiodynamic polarization, electrochemical impedance spectroscopy (EIS), and scanning electron microscopy/energy dispersive X‐ray spectroscopy techniques. The experimental results showed that BTA could protect effectively copper alloys in aqueous TBAB solution. The inhibition efficiency of BTA increased with increasing inhibitor concentration from 0.1 to 6 g/L, attaining efficiencies of up to 96% calculated according to different methodologies. Corrosion current densities were lower after the melting process. Galvanic studies showed that copper behaved as the anode when coupled to its alloys. The addition of BTA caused an increase in charge transfer resistance and a decrease in the capacitance of the double layer. Adsorption of BTA in 17 wt% TBAB solution on the copper alloys' surface was found to obey the Langmuir adsorption isotherm.     

The synergistic effect of Na3PO4 and benzotriazole on the inhibition of copper corrosion in tetra‐n‐butylammonium bromide aerated aqueous solution

The effect of Na₃PO₄ and the mixture of benzotriazole (BTA) and Na₃PO₄ (SP) on the corrosion of copper in 17 wt% (0.534 mol/L) tetra‐n‐butylammonium bromide (TBAB) aerated aqueous solution has been investigated by means of weight‐loss test, potentiodynamic polarization test, electrochemical impedance spectroscopy (EIS), and scanning electron microscopy/energy dispersive X‐ray techniques. The experimental results showed that a dosage of Na₃PO₄ stimulated the copper corrosion, and the corrosion rate increased with increasing Na₃PO₄ concentration, whereas the mixture of BTA and Na₃PO₄ could protect copper in aqueous TBAB solution. The inhibition action of the mixture of BTA and Na₃PO₄ on the corrosion of copper is mainly due to the inhibition of the anodic process of corrosion. The inhibition efficiency of a mixture consisting of 2 g/L BTA and 1 g/L Na₃PO₄ was about 96%. The mixture of BTA and Na₃PO₄ inhibits the corrosion of copper better than BTA by itself, indicating that Na₃PO₄ has a synergistic role with BTA on the corrosion inhibition of copper in TBAB aqueous solution.     

苯并三唑对碳钢/铜合金电偶腐蚀行为的影响

目的 研究NaCl溶液中苯并三唑(BTA)对碳钢/铜合金电偶腐蚀行为的影响.方法 使用丝束电极(WBE)技术和电化学阻抗谱(EIS)技术研究在未添加和添加BTA的NaCl溶液中,丝束电极表面的电位分布、电流密度分布和电化学阻抗谱演化,同时对比分析碳钢区域与铜合金区域的阻抗谱特征.结果 在未添加BTA的条件下浸泡72 h...     

BTA酰基衍生物的合成及对Cu在3%NaCl水溶液中缓蚀性能的研究

用苯并三氮唑(BTA)和酸性氯化物(酰氯类)合成7种BTA酰基衍生物.采用间接失重方法比较BTA及其衍生物对Cu在3%NaCl水溶液中的缓蚀性能.结果表明:7种BTA衍生物中,Glutaryl/BTA的缓蚀性能远优于BTA;C5/BTA的缓蚀性不及BTA;其余5种的缓蚀性能均略优于BTA.用传统的失重方法测试金属缓蚀性能需要最少几十天才能完成.用阳极微分脉冲溶出伏安法(DPAS),可以灵敏地测出Cu泡在3%NaCl里一天溶出痕量的铜离子浓度.     

复配BTA与TTA钝化纯铜工艺研究

目的为了提高纯铜表面的耐腐蚀性。方法通过苯并三氮唑(BTA)与甲基苯并三氮唑(TTA)复配,对纯铜进行钝化,并分析钝化温度、时间及pH值对纯铜钝化效果的影响。分别运用电化学法、硝酸点滴实验、中性盐雾实验、SEM等手段对不同钝化液钝化膜的微观结构与耐蚀性能进行研究,并与铬酸盐钝化结果进行对比。结果将4 g/L BTA、4 g/L TTA复配,辅以氧化剂20 m L/L H_2O_2,对纯铜以pH值为4、钝化时间3 min、钝化温度40℃、自然风干老化1 d的钝化工艺处理后,可以生成明显的钝化膜。其表面致密,耐蚀性较好,在盐雾试验中腐蚀缓慢,其平均腐蚀速率为0.76 mg/d,自腐蚀电流密度仅为1.5660μA/cm2,缓蚀率达到81.9%,接近铬酸盐钝化的抗腐蚀效果。结论在适宜的钝化工艺下,经过BTA与TTA复配钝化后,可以在基体表面生成Cu/Cu_2O/Cu(I)BTA聚合物保护膜,同时TTA的非极性甲基形成的单分子层膜的疏水性更好,两者共同作用,形成较为致密的钝化膜覆盖在铜基体表面,明显提高纯铜表面耐蚀性。     

Corrosion inhibition of copper in tetra‐n‐butylammonium bromide aqueous solution by benzotriazole

The corrosion inhibition behavior of benzotriazole (BTA) on copper in 17 wt% tetra‐n‐butylammonium bromide (TBAB) aerated aqueous solution was investigated by weight‐loss tests, potentiodynamic polarization, electrochemical impedance spectroscopy, and scanning electron microscopy/energy dispersive X‐ray spectroscopy. BTA is a good inhibitor in 17 wt% TBAB solution. The inhibition efficiency of BTA increases with increasing inhibitor concentration, attaining efficiencies of up to 90% calculated according to different methodologies. Adsorption of BTA in 17 wt% TBAB solution on the copper surface was found to obey the Langmuir adsorption isotherm.     

铜表面BTA薄膜在强酸中耐蚀性的电化学阻抗研究

用电化学阻抗法研究铜在强酸中添加BTA(苯并三唑)及铜表面预覆BTA薄膜后在强酸中的耐蚀行为和机理。研究表明:在强酸溶液中,BTA与二价铜离子形成不同配位数的Cu—BTA配合物,在硫酸中抑制阳极反应,在盐酸中抑制阴极反应。在铜表面预覆BTA薄膜,对铜有更好的防蚀保护性能。     

Impedance and XPS study of benzotriazole films formed on copper, copper-zinc alloys and zinc in chloride solution

The formation of protective layers on copper, zinc and copper-zinc (Cu-10Zn and Cu-40Zn) alloys at open circuit potential in aerated, near neutral 0.5 M NaCl solution containing benzotriazole was studied using electrochemical impedance spectroscopy (EIS) and X-ray photoelectron spectroscopy (XPS). Benzotriazole (BTAH), generally known as an inhibitor of copper corrosion, also proved to be an efficient inhibitor for copper-zinc alloys and zinc metal. The surface layers formed on alloys in BTAH-inhibited solution comprised both polymer and oxide components, namely Cu(I)BTA and Zn(II)BTA polymers and Cu₂O and ZnO oxides, as proved by the in-depth profiling of the layers formed. A tentative structural model describing the improved corrosion resistance of Cu, Cu-xZn alloys and Zn in BTAH containing chloride solution is proposed.