【摘要】：以木薯淀粉(CS)、丙烯酰胺(AA)及二甲基二烯丙基氯化銨(DMDAAC)為原料,制備出陽離子木薯淀粉接枝共聚物(CCSGC);采用失重法、開路電位-時間曲線、動電位極化曲線、電化學阻抗譜(EIS)和SEM考察了CCSGC對冷軋鋼在HCl介質(zhì)中的緩蝕性能。結(jié)果表明:CCSGC在1.0 mol/L HCl溶液中對冷軋鋼具有優(yōu)良的緩蝕作用,20~50℃下,當CCSGC添加量為50 mg/L時,冷軋鋼的最大緩蝕率均能超過92%,緩蝕性能明顯高于CS、AA、DMDAAC或CS/AA/DMDAAC混合物。CCSGC在鋼表面的吸附符合Langmuir吸附等溫式,且為混亂度增加、放熱的混合吸附過程。CCSGC為通過"幾何覆蓋效應(yīng)"同時抑制陰極和陽極的混合抑制型緩蝕劑;EIS結(jié)果表明:EIS呈存在彌散效應(yīng)的容抗弧,電荷轉(zhuǎn)移電阻隨CCSGC質(zhì)量濃度的增加而增大,但雙電層電容值卻減小。SEM結(jié)果表明:CCSGC能有效地抑制鋼在HCl中的腐蝕。
[Abstract]:Cationic cassava starch graft copolymer (CCSGC); was prepared from cassava starch (CS), acrylamide (AA) and dimethyldiallylammonium chloride (DMDAAC). The inhibition properties of CCSGC on cold rolled steel in HCl medium were investigated by weightlessness method, open-circuit potential-time curve, potentiodynamic polarization curve, electrochemical impedance spectroscopy (EIS) and SEM. The results show that CCSGC has excellent corrosion inhibition effect on cold rolled steel in 1. 0 mol/L HCl solution. The maximum corrosion inhibition rate of cold rolled steel can exceed 92% at 20 ~ 50 鈩，

本文編號：2305092