CAJ | 학술논문

以有机酸或脂肪酸甲酯和二乙烯三胺或三乙烯四胺、四乙烯五胺为原料、甲苯为携水剂,制备了一系列单环咪唑啉类缓蚀剂;采用静态失重法考察了单环咪唑啉分子中的亲水基团结构、疏水基团结构对单环咪唑啉类缓蚀剂缓蚀性能的影响.结果表明,咪唑啉分子中亲水基团碳链变长、氮原子个数增加,缓蚀剂对A3碳钢的缓蚀率增加;分子中疏水基团碳链变短时,对A3碳钢的缓蚀率降低,当碳原子个数少于12时,缓蚀率明显降低;疏水基团为体积较大的脂环基团或混合的脂肪酸基团时,该缓蚀剂都具有很强的缓蚀作用,且能有效抑制氢鼓泡.油酸与四乙烯五胺合成的油酸基单环咪唑啉用量为6 mg/L时,对A3碳钢的缓蚀率可达99%;环烷酸与四乙烯五胺合成的环烷基单环咪唑啉用量为4 mg/L时,对A3碳钢的缓蚀率可达98%;混合脂肪酸甲酯与四乙烯五胺合成的脂肪酸基单环眯唑啉用量为6 mg/L时,对A3碳钢的缓蚀率可达97%以上,且都具有很好的抑制氢鼓泡性能.
이유궤산혹지방산갑지화이을희삼알혹삼을희사알、사을희오알위원료、갑분위휴수제,제비료일계렬단배미서람류완식제;채용정태실중법고찰료단배미서람분자중적친수기단결구、소수기단결구대단배미서람류완식제완식성능적영향.결과표명,미서람분자중친수기단탄련변장、담원자개수증가,완식제대A3탄강적완식솔증가;분자중소수기단탄련변단시,대A3탄강적완식솔강저,당탄원자개수소우12시,완식솔명현강저;소수기단위체적교대적지배기단혹혼합적지방산기단시,해완식제도구유흔강적완식작용,차능유효억제경고포.유산여사을희오알합성적유산기단배미서람용량위6 mg/L시,대A3탄강적완식솔가체99%;배완산여사을희오알합성적배완기단배미서람용량위4 mg/L시,대A3탄강적완식솔가체98%;혼합지방산갑지여사을희오알합성적지방산기단배미서람용량위6 mg/L시,대A3탄강적완식솔가체97%이상,차도구유흔호적억제경고포성능.
A series of imidazoline corrosion inhibitors was synthesized from olelic acid or fatty acid methyl ester with diethylen etriamine or triethylenetetramine and tetraethylenepentamine by using toluene as water carrying agent. Static weight-loss method was used to investigate the effect of hydrophilic group and hydrophobic group in the imidazoline molecule on the anti-corrosion performance of the imidazoline corrosion inhibitors. The results showed that the corrosion inhibition rate to A3 steel for the olelic-imidazoline with longer hydrophilic group and more nitrogen atoms was high, while it decreased significantly as the number of carbon atoms in hydrophilic group less than 12. Larger alicyclic group in hydrophobic groups or mixed fatty acid of hydrophobic groups in imidazoline molecule could improve the corrosion inhibition of the imidazoline and inhibit the hydrogen blistering effectively. The corrosion inhibition rate of the single alicyelic olelic-imidazoline synthesized with olelic acid and tetraethylenepentamine was up to 99% for A3 steel at the imidazoline dosage of 6 mg/L, while that of the single alicyclic imidazoline synthesized with naphthenic acid and diethylenetriamine could reach 98% at the dosage of 4 mg/L and that of the fatty acid imidazoline synthesized with mixed fatty acid methyl ester and tetraethylenepentamine was up to 97% at the dosage of 6 mg/L, and all of them could well inhibit hydrogen blistering.