【摘要】 采用电化学方法模拟某含H2 S和CO2 的高温高压气井腐蚀环境 ,研究了咪唑啉衍生物对N80油管钢的缓蚀机理和缓蚀行为。结果表明 :该咪唑啉衍生物能与介质中的硫化物共同与铁原子配位 ,产生稳定的吸附膜 ,属于阳极型缓蚀剂 ,其缓蚀机理为“负催化效应” ,在较强的阳极极化条件下的脱附行为服从金属基底原子离子化溶解对缓蚀剂的冲击脱附模型 ,对裸钢或已经发生了腐蚀的油管钢都能起到较好的防护作用 ,能抑制H2 S导致的局部腐蚀。更多还原

【Abstract】 Through simulating the corrosion environment in one high-temperature and high pressure gas well containing H 2S/CO 2 by use of electrochemical method,the inhibition mechanism and behavior of imidazoline derivant on tubing steel N80 were studied by the authors.It is concluded that,together with the sulfide in medium,the imidazoline derivant can coodinate the ferric atom into a steady adsorption film;it belongs in an anodic inhibitor and its inhibition mechanism is regarded as “nagative catalytic effect”;and the desorption at strong anodic polarization obeys the desorption model of the concussion of the ionized dissolution of metallic atom on the inhibitor,which plays an important role in protecting the bare steel and eroded tubing steel and can restrain the local corrosion caused by H 2S.更多还原