绿色复合型缓蚀剂的制备及性能研究

Study on preparation and performance of green composite corrosion inhibitor

以聚天冬氨酸(PASP)、多氨基多醚基甲叉膦酸(PAPEMP)、N-(3-氨丙基)咪唑(N-API)和硫酸锌(ZnSO 4)为主要原料,制备了绿色复合型缓蚀剂,研究了其在0.5 mol/L H 2SO_(4)溶液中对抑制20#碳钢腐蚀的协同作用.实验结果表明,当复合缓蚀剂中PASP,PAPEMP,N-API,ZnSO 4的质量浓度分别为30,20,40和4 mg/L时,其缓蚀率可达97.6%.电化学测试表明该缓蚀剂表现为阳极型缓蚀剂,抑制了金属的溶解和阴极过程,表现出明显的协同作用.通过SEM表面分析表明复合缓蚀剂具有显著的缓蚀性能.

A green composite corrosion inhibitor was prepared from polyaspartic acid(PASP),polyamino polyether methylidene phosphonic acid(PAPEMP),N-(3-aminopropyl)imidazole(N-API)and zinc sulfate(ZnSO_(4)).Its synergistic effect on inhibiting 20#carbon steel corrosion in 0.5 mol/L H 2SO 4 solution was studied.The experimental results show that when the mass concentrations of PASP,PAPEMP,N-API and ZnSO 4 in the composite inhibitor is 30,20,40 and 4 mg/L respectively,the inhibition rate can reach 97.6%.The electrochemical tests show that the inhibitor is an anodic inhibitor,which inhibits the dissolution of metal and cathodic process,showing obvious synergistic effect.SEM surface analysis shows that the composite corrosion inhibitor has significant corrosion inhibition performance.