2种癸二酸咪唑啉季铵盐的合成及缓蚀性能评价

摘要

Two sebacic acid imidazoline quaternary ammonium salts, sebacic acid-salicylic acid imidazoline quaternary ammonium salts ( SSAI) and sebacic acid imidazoline quaternary ammonium salts ( SAI), were synthesized and their inhibition action and adsorption behavior on N80 steel in 1 mol/L hydrochloric solution were investigated by means of mass loss and electrochemical techniques. It was showed that the two compounds had good corrosion inhibition for N80 steel in 1 mol/L HC1 solution. SSAI was found to have a superior inhibition efficiency to SAI. Both SSAI and SAI were mixed-type inhibitors and mainly inhibited anode process against N80 steel in 1 mol/L HC1 solution. The experimental results revealed that the adsorption processes were exothermic reaction and belong to chemical adsorption.%合成了2种癸二酸咪唑啉季铵盐癸二酸-水杨酸咪唑啉季铵盐( SSAI)和癸二酸咪唑啉季铵盐(SAI),并采用失重法和电化学方法研究了这2种咪唑啉季铵盐对N8O钢在1 mol/L HCl溶液中的缓蚀性能和吸附行为.结果表明,在1 mol/L HCl溶液中这2种化合物对N80钢均有较好的缓蚀作用,缓蚀效率大小顺序为SSAI ＞SAI.SSAI和SAI均为混合偏阳极型缓蚀剂.2种化合物在N80钢表面的吸附服从Langmuir吸附等温式,属于化学吸附.