摘要
以5-甲基-2-巯基-1,3,4-噻二唑为原料经过系列反应,合成了3种新型酰胺类缓蚀剂。实验结果表明:所合成的3种缓蚀剂在酸性介质中对不锈钢的缓蚀效率都随浓度的增加而增加,当用量达到50 mg/L时,其缓蚀效果达到最佳,其中C3的缓蚀效果最大,达到98%。加入缓蚀剂C3以后,在不锈钢表面生成一层缓蚀剂保护膜,阻止不锈钢表面与硫酸等腐蚀性介质的接触,当缓蚀剂的浓度为50×10-6 mol/L时,其自腐蚀电位最高,其腐蚀电流密度最小,为1.5μA/cm^2。EIS结果表明所绘制的几种曲线的形状大体相似,未加缓蚀剂的试片其容抗弧半径最小,加入缓蚀剂以后,其容抗弧半径明显增加,加有C3缓蚀剂的不锈钢片其容抗弧半径最大,其对不锈钢保护作用最明显。
5-Methyl-2-mercapto-1,3,4-thiadiazole was used as raw material,and three new amide corrosion inhibitors were synthesized through a series of reactions.The performance of the synthesized corrosion inhibitor was tested.The experimental results show that the corrosion inhibition efficiency of the three synthesized corrosion inhibitors on stainless steel in acid medium increases with the increase of the concentration.When the dosage reaches 50 mg/L,the corrosion inhibition effect reaches the best.Among them,C3 inhibits corrosion.The erosion effect is the largest,reaching 98%.After adding corrosion inhibitor C3,a protective film of corrosion inhibitor is formed on the surface of stainless steel to prevent the stainless steel surface from contacting corrosive media such as sulfuric acid.When the concentration of corrosion inhibitor is 50×10-6 mol/L,The corrosion potential is the highest,and the corrosion current density is the smallest,1.5μA/cm^2.The EIS results show that the shapes of the drawn curves are roughly the same.The test piece without corrosion inhibitor has the smallest capacitive arc radius.After adding the corrosion inhibitor,the capacitive arc radius increases significantly.The one with C3 corrosion inhibitor.The stainless steel sheet has the largest capacitive resistance arc radius,and its protective effect on stainless steel is the most obvious.
作者
王恩东
Wang Endong(Teaching Affairs Office, Chongqing Industry and Trade Polytechnic, Chongqing 408000, China)
出处
《精细石油化工》
CAS
北大核心
2020年第6期66-70,共5页
Speciality Petrochemicals
关键词
噻二唑
缓蚀性能
合成
不锈钢
thiadiazole
corrosion inhibition performance
synthesis
stainless steel
