采用失重法与电化学方法研究了咪唑和2-苯基-2-咪唑啉对Cu在5% H2SO4水溶液中的缓蚀性能、吸附行为及缓蚀机理.结果表明,2种化合物对Cu均具有显著的缓蚀作用,且2-苯基2-咪唑啉的缓蚀效率大于咪唑.同时,分别采用腐蚀反应中的活化能Ea,吸附过程中的Gibbs自由能△Gm和吸附焓△Hm判断了2种化合物在Cu表面上的吸附特性.结果表明,咪唑和2-苯基-2-咪唑啉在Cu表面上的吸附过程为放热过程,均为单层化学吸附,服从Langmuir吸附等温式.此外,研究了咪唑和2-苯基-2-咪唑啉分子在Cu表面形成吸附层结构的差异,分析其对Cu的缓蚀机理.
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