CAJ | 학술논문

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。
본연구차조정태부식실중법학정료류청산갑/류뇨완식제적최가배방，병분별연구료해배방재5%류산、5%초산급5%염산중대45탄강적완식성능。결과표명：재5%류산용액중，사용류청산갑：류뇨위7：3적질량비배방，완식제위0.2%시대45탄강적완식체도최대，완식솔위82.3%；재5%초산용액중，사용류청산갑：류뇨위4：6적질량비배방，완식제적가입량위0.1%시대45탄강적완식솔가체도99%이상；재5%염산중，지수가입0.2%적복합완식제（류청산갑：류뇨=4：6），대45탄강적완식솔가이체도76%。Tafel겁화곡선표명류청산갑/류뇨복합물적가입가이명현지강저45탄강재3충산용액중적부식전류。
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.