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以4种不同碳链长度的烷基硫醇、氯乙酸钠和苯并三唑为原料,合成了一系列新型的1-(2’-烷硫基乙酰基)-苯并三唑缓蚀剂。采用失重法和电化学方法评价了这4种苯并三唑衍生物对Cu在3.5%(质量分数)NaCl溶液中的缓蚀性能,同时对缓蚀剂分子在Cu表面的吸附规律进行了初步的研究。结果表明,该系列苯并三唑衍生物是一类以阳极抑制为主的混合型缓蚀剂,其在Cu表面的吸附行为符合Langmuir等温吸附模型,吸附过程包括物理吸附和化学吸附,当用量为150 mg·kg~(-1)时,缓蚀率可达到94.6%以上,并且具有良好的耐温性能。
A series of novel 1- (2’-alkylthioacetyl) -benzotriazole inhibitors were synthesized from alkylthiols, sodium chloroacetate and benzotriazole with four different carbon chain lengths . The corrosion inhibition behaviors of these four benzotriazole derivatives on 3.5% (mass fraction) NaCl solution were evaluated by weight loss method and electrochemical method, and the adsorption behavior of corrosion inhibitor molecule on Cu surface was also preliminary Research. The results show that the series of benzotriazole derivatives are a kind of mixed inhibitor with anode inhibition mainly. The adsorption behavior on Cu surface conforms to the Langmuir isothermal adsorption model. The adsorption process includes physical adsorption and chemisorption. When 150 mg · kg ~ (-1), the corrosion inhibition rate can reach 94.6%, and has good temperature resistance.