CAJ | 학술논문

目前,国内外有关N-长链烷基苯并咪唑对钢缓蚀作用的研究鲜见报道,苯并咪唑无毒,环境友好,可替代苯并三氮唑,利用价值大.合成了一系列不同链长的N-烷基苯并咪唑阳离子(NBIC),并研究了其对碳钢的缓蚀性能和作用机理.通过失重法、极化曲线法、扫描电镜分析以及对吸附热的计算等考察了40℃下N-烷基苯并咪唑阳离子在1.0 mol/L HCl中对碳钢的缓蚀作用.NBIC在较低浓度(20 mg/L)下就表现出优异的性能,以N-正十二基苯并咪唑阳离子(N12BIC)效果最好.随着浓度的增加,缓蚀效率增加,当N12BIC浓度为50 mg/L时,缓蚀率达到97.15%.吸附热数据表明在碳钢表面的吸附行为既包含化学吸附又有物理吸附.极化曲线测试表明,NBIC是一种以抑制阴极反应为主的混合型缓蚀剂.
목전,국내외유관N-장련완기분병미서대강완식작용적연구선견보도,분병미서무독,배경우호,가체대분병삼담서,이용개치대.합성료일계렬불동련장적N-완기분병미서양리자(NBIC),병연구료기대탄강적완식성능화작용궤리.통과실중법、겁화곡선법、소묘전경분석이급대흡부열적계산등고찰료40℃하N-완기분병미서양리자재1.0 mol/L HCl중대탄강적완식작용.NBIC재교저농도(20 mg/L)하취표현출우이적성능,이N-정십이기분병미서양리자(N12BIC)효과최호.수착농도적증가,완식효솔증가,당N12BIC농도위50 mg/L시,완식솔체도97.15%.흡부열수거표명재탄강표면적흡부행위기포함화학흡부우유물리흡부.겁화곡선측시표명,NBIC시일충이억제음겁반응위주적혼합형완식제.
A series of N-alkyl benzimi-dazole cations (NBIC) with different alkyl length were synthe-sized. The inhibition behavior of NBIC for mild steel in 1.0 mol/L HC1 medium at 40 ℃ was investigated by measurement of weight loss and polarization curves, observation of scanning elec-tron microscopy and calculation of adsorption heat. It was found that NBIC had excellent inhibition efficiency for mild steel even at a low concentration of 20 mg/L, and N -dodecane benzimidazole cationic (N12 BIC) showed the best inhibition performance. The inhibition efficiency increased with increasing concentration of NBIC, and reached as much as 97.15% at a N12BIC concentra-tion of 50 mg/L. Moreover, NBIC acted to inhibit corrosion of the mild stcel by chemical adsorption and physical adsorption there-on. And it appeared as a type of mixed inhibitor dominated by cathode inhibition.