(1. 重慶科技學(xué)院 化學(xué)化工學(xué)院，重慶 401331；
2. 西南大學(xué) 化學(xué)化工學(xué)院，重慶 400715)
摘 要: 采用分子自組裝技術(shù)，在銅電極表面形成一層1, 3−二巰基硫醇(BDT)單分子自組裝膜。通過交流阻抗、極化曲線和循環(huán)伏安等電化學(xué)方法探討該自組裝膜在3%NaCl溶液中對銅電極的緩蝕作用。實(shí)驗(yàn)表明：BDT能夠有效地組裝到銅的表面形成單分子自組裝膜，BDT自組裝膜能有效地抑制銅基底在3%NaCl腐蝕介質(zhì)以及酸性NaCl溶液中的腐蝕行為；緩蝕效率隨組裝時(shí)間的延長逐漸升高并趨于穩(wěn)定，在pH值較低的溶液中仍具有較好的緩蝕效果；當(dāng)BDT濃度為1.0×10−2 mol/L、組裝時(shí)間為40 h時(shí)，銅電極的腐蝕電流最小，緩蝕效率最好。
關(guān)鍵字: 1, 3－二巰基硫醇；自組裝膜；銅電極；緩蝕
（1. School of Chemistry and Chemical Engineering, Chongqing University of Science and Technology,
Chongqing 401331, China;
2. School of Chemistry and Chemical Engineering, Southwest University, Chongqing 400715, China）
Abstract:Adopting molecular self-assembly technique, a self-assembled membrane of 1, 3-benzenedithiol (BDT) was formed on the surface of the copper electrode. The effect of this membrane on the corrosion inhibition of copper electrode in 3% NaCl solution was investigated by using electrochemical impedance spectroscopy (EIS), polarization curve and cyclic voltammetry (CV). The results show that BDT can be assembled on the surface of copper electrode to form monomolecular self-assembled membrane，and the membrane can efficiently inhibit the copper base corrosion in the 3% NaCl corrosion medium and acidic solution. The inhibition efficiency increases with increasing assembling time and obtains steady state gradually. In the solution with lower pH value, BDT can also keep good inhibitor. When the copper electrode is modified with 1.0×10−2 mol/L BDT for 40 h, the corrosion current is the smallest, the inhibition efficiency is the highest.
Key words: 1, 3-benzenedithiol; self-assembled monolayer; copper electrode; corrosion
