新型固体复合缓蚀剂对20碳钢在酸洗液中的缓蚀性能研究  

Corrosion Inhibition Performance of a New Solid Compound Inhibitor for 20 Carbon Steel in Pickling Solutions

作　　者：王永垒[1] 李海云[1] 方红霞[1] 徐先刚 陆露露[1] 

机构地区：[1]黄山学院化学化工学院,黄山245041 [2]常州联江环保科技有限公司,常州213164

出　　处：《腐蚀科学与防护技术》2015年第3期243-248,共6页Corrosion Science and Protection Technology

基　　金：黄山学院引进人才启动项目(2015xkjq002);国家级大学生创新训练项目(201410375004);黄山学院校级项目(2014xkjq012)资助

摘　　要：以固体间苯二胺、硫氰酸钾及乌洛托品为原料研制了一种新型固体复合型缓蚀剂,并利用静态失重法、Tafel极化曲线、电化学阻抗研究了其在10%HCl溶液、10%H2SO4溶液、10%HNO3溶液中对20碳钢的缓蚀行为。结果表明,在上述3种酸溶液中,添加0.5%的新型固体复合型缓蚀剂即可使20碳钢的缓蚀率全部达到80%以上,其中在10%HNO3溶液中,20碳钢的缓蚀率可以达到99.1%。Tafel极化曲线及电化学阻抗也表明该缓蚀剂的加入显著地抑制了20碳钢在酸溶液中的腐蚀速率,说明该缓蚀剂能够在20碳钢的表面形成缓蚀性能优良的保护膜。A new solid compound inhibitor was prepared using solid 1,3-benzendiamine, potassium thiocyanate and methenamine as main raw materials. The corrosion inhibition behavior of the inhibitor for 20 carbon steel in pickling solutions(10% hydrochloric acid, 10% sulfuric acid and 10% nitric acid) were studied by static mass loss method, Tafel polarization curves and EIS test. The results show that with a dose 0.5% of the inhibitor the corrosion inhibition efficiencies for 20 carbon steel are all higher than 80% in the above-mentioned three acid solutions, among them the highest is 99.1% for the steel in 10% nitric acid. Results of Tafel polarization curves and EIS measurement show that the addition of the inhibitor can significantly reduce the corrosion rate of 20 carbon steel,which demonstrated the new inhibitor could form a film with excellent corrosion protectiveness on the surface of 20 carbon steel.

关 键 词：固体复合型 20碳钢 缓蚀剂 Tafel曲线 

分 类 号：TG174.42[金属学及工艺—金属表面处理]