一种新型含硫曼尼希碱的合成与缓蚀性能研究  

Study on synthesis and corrosion inhibition of a novel sulfur-containing Mannich base

作　　者：胡闪 王任芳[1] 石东坡[1] 杨婷 李克华[1] 苏铁军[2] HU Shan;WANG Ren-fang;SHI Dong-po;YANG Ting;LI Ke-hua;SU Tie-jun(School of Chemistry and Environmental Engineering,Yangtze University,Jingzhou 434023,China;College of Engineering and Technology,Yangtze University,Jingzhou 434020,China)

机构地区：[1]长江大学化学与环境工程学院,湖北荆州434023 [2]长江大学工程技术学院,湖北荆州434020

出　　处：《应用化工》2020年第8期1925-1929,共5页Applied Chemical Industry

基　　金：国家自然科学基金(41202111);湖北省教育厅科学技术研究项目资助(B2016445)。

摘　　要：由苯甲醛、苯乙酮和氨基硫脲合成曼尼希碱缓蚀剂,通过静态失重实验、动电位极化曲线、交流阻抗等方法评价了其在10%HCl溶液中对N80钢的缓蚀性能。结果表明,在缓蚀剂加量为1%、60℃的10%盐酸溶液中,N80钢片的腐蚀速率为0.6274 g/(m^2·h);随着温度的升高和盐酸浓度的增加,缓蚀剂的腐蚀速率有所上升,但都在1 g/(m^2·h)以下;缓蚀剂在钢片表面的吸附符合Langmuir吸附等温模型;加入缓蚀剂后,钢片的腐蚀电流密度降低,电荷转移电阻增大,表明该缓蚀剂能有效地抑制N80钢的腐蚀。Mannich base inhibitors were synthesized from benzaldehyde,acetophenone and thiosemicarbazone.The corrosion inhibition performance of N80 steel in 10%HCl solution was evaluated by static weightlessness experiments,dynamic potential polarization curves,and AC impedance.The results show that the corrosion rate of N80 steel sheet is 0.6274 g/(m^2·h)in a 10%hydrochloric acid solution containing 1%corrosion inhibitor at 60℃.As the temperature increases and the concentration of hydrochloric acid increases,the corrosion rate of the corrosion inhibitor increases,but both are below 1 g/(m^2·h);the adsorption of the corrosion inhibitor on the surface of the steel sheet conforms to the Langmuir adsorption isothermal model;After the inhibitor was added,the corrosion current density of the steel sheet decreased and the charge transfer resistance increased,indicating that the inhibitor can effectively inhibit the corrosion of N80 steel.

关 键 词：缓蚀剂 吸附 电化学 曼尼希碱 

分 类 号：TQ031.2[化学工程] TQ035