硫氰酸钾/硫脲复合物对45碳钢的缓蚀性能评价  

CORROSION INHIBITION PERFORMANCE OF THE POTASSIUM THIOCYANATE/THIOUREA COMPLEX ON THE 45 CARBON STEEL

作　　者：王永垒[1] 李海云[1] 陆露露[1] 彭志翔[1] 

机构地区：[1]黄山学院化学化工学院,安徽黄山245041

出　　处：《井冈山大学学报（自然科学版）》2015年第4期17-20,共4页Journal of Jinggangshan University (Natural Science)

基　　金：国家级大学生创新创业训练计划项目(201410375004);黄山学院校级科研项目(2014xkj012)

摘　　要：本研究借助静态腐蚀失重法确定了硫氰酸钾/硫脲缓蚀剂的最佳配方,并分别研究了该配方在5%硫酸、5%硝酸及5%盐酸中对45碳钢的缓蚀性能。结果表明:在5%硫酸溶液中,使用硫氰酸钾:硫脲为7:3的质量比配方,缓蚀剂为0.2%时对45碳钢的缓蚀达到最大,缓蚀率为82.3%;在5%硝酸溶液中,使用硫氰酸钾:硫脲为4:6的质量比配方,缓蚀剂的加入量为0.1%时对45碳钢的缓蚀率可达到99%以上;在5%盐酸中,只需加入0.2%的复合缓蚀剂(硫氰酸钾:硫脲=4:6),对45碳钢的缓蚀率可以达到76%。Tafel极化曲线表明硫氰酸钾/硫脲复合物的加入可以明显地降低45碳钢在3种酸溶液中的腐蚀电流。The best formula and corrosion inhibition performances of the potassium thiocyanate/ thiourea complex inhibitor on the 45 carbon steel in different acid solutions（5%H2SO4, 5%HNO3, 5%HCl）were studied by static weight loss method. The results showed that the corrosion inhibition efficiency of 45 carbon steel in 5% H2SO4 was 82.3% with 0.2% adding amount of complex inhibitor （weight ratio of potassium thiocyanate to thiourea, 7：3）, and it was above 99% and 76% in 5% HNO3 and HCl with 0.1% and 0.2% adding amount of complex inhibitor （weight ratio of potassium thiocyanate to thiourea, 4：6）, respectively. Tafel polarization curve results showed that the addition of the potassium thiocyanate/thiourea complex can significantly reduce corrosion current.

关 键 词：硫氰酸钾 硫脲 失重法 复合物 45碳钢 

分 类 号：TG174.4[金属学及工艺—金属表面处理]