Anticorrosion Performance of Carbon Steel in 55% LiBr Solution Containing PMA/SbBr_3 Inhibitor

作     者：HU Xian-qi LIANG Cheng-hao HUANG Nai-bao 

作者机构：School of Chemical Engineering Dalian University of Technology Dalian 116012 Liaoning China Electromechanics and Materials Engineering College Dalian Maritime University Dalian 116026 Liaoning China 

出 版 物：《Journal of Iron and Steel Research International》 (J. Iron Steel Res. Int.)

年 卷 期：2006年第13卷第4期

页      面：56-60页

核心收录：

学科分类：080503[工学-材料加工工程] 08[工学] 0805[工学-材料科学与工程（可授工学、理学学位）] 

主　　题：carbon steel lithium bromide corrosion inhibitor 

摘      要：The anticorrosion performance of carbon steel in 55 % LiBr solution containing PMA/SbBr3 inhibitor was studied by weight-loss tests, electrochemical measurements and surface analysis. In 55 %LiBr＋PMA/SbBr3 solution, corrosion rates of carbon steel at 145 ℃, 175℃, 190℃ and 240℃ are 18.32μm·a^-1 , 27.68μm·a^-1, 53.58μm·a^-1 and 73. 78μm·a^-1 , respectively. PMA/SbBr3 inhibitor may inhibit the corrosion of carbon steel in 55% LiBr solution effectively. Especially, it shows an excellent corrosion inhibition performance at high temperature. Both anodic and cathodic reactions of carbon steel may be inhibited by PMA/SbBr3 inhibitor, so it may be classified as mixed inhibitor. In 55%LiBr＋PMA/SbBr3 solution, the apparent activation energy of the corrosion reaction of carbon steel is 29. 61 kJ·mol^-1. The corrosion inhibition mechanism of PMA/SbBr3 is suggested as follows： PMA has the effect of inhibiting hydrogen evolution and a strong oxidizing property; Sb^3＋ also exhibits oxidizing properties, and can exist stably with PMA in LiBr solutions; the passive film comprising Fe2O3 and antimony formed on carbon steel surface may prevent Brfrom diffusing into the metal surface due to the synergistic effect of PMA and Sb^3＋ ; As a result, the anticorrosion performance of carbon steel may be improved by PMA/SbBr3 inhibitor in 55% LiBr solution.