中国腐蚀与防护学报
中國腐蝕與防護學報
중국부식여방호학보
JOURNAL OF CHINESE SOCIETY FOR CORROSION AND PROTECTION
2009年
5期
333-338
,共6页
CO_2腐蚀%缓蚀剂%咪唑啉%疏水基团%流速
CO_2腐蝕%緩蝕劑%咪唑啉%疏水基糰%流速
CO_2부식%완식제%미서람%소수기단%류속
carbon dioxide corrosion%corrosion inhibitor%imidazoline%hydrophobic group%flow condition
合成了四种含有不同疏水基团的咪唑啉型缓蚀剂,即正丁基咪唑啉(IM-4)、壬基咪唑啉(IM-9)、十一烷基咪唑啉(IM-11)和十七烷基咪唑啉(IM-17),产物经红外,紫外光谱等进行表征.在静态及动态条件下,用失重法、电化学等方法研究各缓蚀剂对N80钢在CO_2饱和的3%NaCl溶液中的缓蚀性能.结果表明,静态条件下,缓蚀剂的缓蚀性能与疏水基团的碳链长度、空间位阻及其水溶性有关;在介质流速为5 m/s的动态条件下,缓蚀剂的缓蚀效率显著降低,对缓蚀剂的疏水和屏障作用要求更高.
閤成瞭四種含有不同疏水基糰的咪唑啉型緩蝕劑,即正丁基咪唑啉(IM-4)、壬基咪唑啉(IM-9)、十一烷基咪唑啉(IM-11)和十七烷基咪唑啉(IM-17),產物經紅外,紫外光譜等進行錶徵.在靜態及動態條件下,用失重法、電化學等方法研究各緩蝕劑對N80鋼在CO_2飽和的3%NaCl溶液中的緩蝕性能.結果錶明,靜態條件下,緩蝕劑的緩蝕性能與疏水基糰的碳鏈長度、空間位阻及其水溶性有關;在介質流速為5 m/s的動態條件下,緩蝕劑的緩蝕效率顯著降低,對緩蝕劑的疏水和屏障作用要求更高.
합성료사충함유불동소수기단적미서람형완식제,즉정정기미서람(IM-4)、임기미서람(IM-9)、십일완기미서람(IM-11)화십칠완기미서람(IM-17),산물경홍외,자외광보등진행표정.재정태급동태조건하,용실중법、전화학등방법연구각완식제대N80강재CO_2포화적3%NaCl용액중적완식성능.결과표명,정태조건하,완식제적완식성능여소수기단적탄련장도、공간위조급기수용성유관;재개질류속위5 m/s적동태조건하,완식제적완식효솔현저강저,대완식제적소수화병장작용요구경고.
Four kinds of imidazoline inhibitors with different hydrophobic group i.e. 2-heptadecyl-aminoethyl-imidazoline (IM-17), 2-undecyl-aminoethyl-imidazoline (IM-11), 2-nonyl-aminoethyl-imidazoline (IM-9), 2-butyl-aminoethyl-imidazoline (IM-4) had been synthesized and characterized by IR and UV spectra. The inhibition performance of these imidazoline inhibitors for CO_2 corrosion of N80 in 3% NaCl solution was investigated through linear polarization resistance, polarization curve and electrochemical impedance spectroscopy under static and flow conditions. The results showed that the inhibition efficiency under static condition decreased in the order of IM-9>IM-4>IM-11> IM-17, i.e. the inhibition efficiency was related with both the solubility and the length of carbon chain of hydrophobic group of imidazolines. In contrast, the inhibition efficiency at 5 m/s decreased in the order of IM-9>IM-l>IM-17>IM-4, and solution flow (5 m/s) dramatically worsened the inhibition performance of imidazolines.
