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《Materials Protection》 2010-05
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Synergistic Inhibition Action of Thiourea and Cetylpyridinium Bromide for X70 Steel in Solution of 30% Lactic Acid

DENG Zu-yu1,2,LI Fu-rong1,WANG Hong-yun1,REN Ya-hua1,HE Xiao-ying1(1. Institute of Chemical Engineering,China West Normal University,Nanchong 637002,China; 2. Sichuan Preschool Education College,Jiangyou 621709,China).  
The inhibition action of thiourea (TU) and cetylpyridinium bromide (CPB) for X70 steel in 30% lactic acid solution,separately or in combination,was investigated by measuring electrochemical impedance spectra and potentiodynamic polarization curves. It was found that both TU and CPB had inhibition function for X70 steel in 30% lactic acid solution. In particular,TU combined with CPB showed better inhibition performance than TU or CPB alone. When TU and CPB were mixed at a mass ratio of 1:1 and introduced as combined inhibitor into the solution of 30% lactic acid at a dose of 20 mg/L,the best inhibition efficiency was obtained.
【Fund】: 四川省科技厅重点项目(04jy029-100)资助
【CateGory Index】: TG174.42
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