(1. 中南大學(xué) 材料科學(xué)與工程學(xué)院，長(zhǎng)沙 410083；2. 中南大學(xué) 有色金屬材料科學(xué)與工程教育部重點(diǎn)實(shí)驗(yàn)室，長(zhǎng)沙 410083)
摘 要: 采用循環(huán)伏安曲線、極化曲線和交流阻抗譜研究銅經(jīng)2-巰基苯并噻唑(MBT)和8-羥基喹啉(HQ)鈍化處理后在3.5%NaCl溶液中的電化學(xué)行為，利用掃描電鏡觀察銅經(jīng)緩蝕溶液處理前后在3.5%NaCl鹽水中的腐蝕形貌。結(jié)果表明，MBT或HQ在銅表面形成的絡(luò)合物膜能明顯改善銅在3.5%NaCl溶液中的耐蝕能力；經(jīng)0.5 mmol/L MBT+0.5 mmol/L HQ復(fù)配溶液處理后，其緩蝕率達(dá)90.3%；緩蝕劑的緩蝕效果由大到小的順序?yàn)椋篗BT+HQ，MBT，HQ，Blank。分析了MBT與HQ兩者具有緩蝕協(xié)同作用的機(jī)理。
關(guān)鍵字: 銅；緩蝕劑；2-巰基苯并噻唑；8-羥基喹啉；協(xié)同作用
（1. College of Material Science and Engineering, Central South University, Changsha 410083, China;2. Key Laboratory of Non-Ferrous Metal Materials Science and Engineering, Ministry of Education,Central South University, Changsha 410083, China）
Abstract:The performance of benzotriazole(BTA) and 2-mercaptobenzothiazole(MBT) as corrosion inhibitors for copper was investigated in 3.5% NaCl solution. Potentiodynamic polarization, cyclic voltammogram and AC impedance spectroscopy were used to study the electrochemical behaviors of copper electrodes passivated by inhibitors and their complex. Corrosion morphologies of copper electrodes in 3.5%NaCl solution were observed directly by scanning electron microscopy (SEM). The results show that the complex compound films formatted by MBT or HQ on copper surface apparently increase the copper electrode anticorrosion in 3.5%NaCl solution. The anticorrosive efficiency of 0.5 mmol/LMBT+0.5 mmol/L HQ combined inhibitor is 90.3%. The anticorrosive effect order of those corrosion inhibitors is MBT+HQ＞MBT＞HQ＞Blank. The mechanism of the synergistic effect for MBT and HQ has also been discussed in detail.
Key words: copper; corrosion inhibitor; 2-mercaptobenzothiazole; 8-oxyquinoline; synergistic effect
