碳钢在液/固双相管流中磨损腐蚀的电化学行为  

ELECTROCHEMICAL BEHAVIOR IN EROSION-CORROSION OF CARBON STEEL IN LIQUID-SOLID DOUBLE PHASE FLOW LOOP

作　　者：田兴玲[1] 林玉珍[1] 刘景军[1] 雍兴跃[1] 

机构地区：[1]北京化工大学材料科学与工程学院,北京100029

出　　处：《中国腐蚀与防护学报》2004年第1期48-51,共4页Journal of Chinese Society For Corrosion and Protection

基　　金：国家自然科学基金 ( 5 0 10 10 0 2 );金属腐蚀与防护国家重点实验室资助项目 ( 2 0 0 14 )

摘　　要：利用自行研制的管流动态模拟试验装置 ,研究了碳钢在液 /固双相流中的磨损腐蚀 .结果表明 :碳钢在含有5 %河砂的双相流动 3 5 %NaCl溶液中 ,磨损腐蚀速度随流速的增加而显著增大 ,没有像单相流中出现磨损腐蚀速度显著降低的流速区段 ,其磨损腐蚀过程仍主要受阴极氧扩散控制 .对碳钢施加阴极电流 ,由于抑制了腐蚀电化学因素 ,从而大幅度削弱了与流体力学因素间的协同效应 ,使碳钢的磨损腐蚀大大减轻 .The electrochemical behavior in erosion-corrosion of carbon steel in flowing liquid-solid double-phase solution was studied with self-made flow loop simulating apparatus.The experimental results showed that erosion-corrosion rate in flowing double-phase 3.5% NaCl solution containing 5% sand increases markedly with increasing flow velocity.But it was not found that the erosion-corrosion rate-decreased region which happened in flowing single phase solution existed.The erosion-corrosion process of carbon steel in flowing liquid-solid double-phase solution is still controlled by cathodic oxygen diffusion process.Once cathodic current was impressed on carbon steel,the erosion-corrosion rate of carbon steel decreases abruptly because the corrosion electrochemistry factor is restrained and the synergism is weakened.It was verified that corrosion electrochemical factor plays a dominant role in erosion-corrosion.

关 键 词：碳钢 液/固双相流管流体系 磨损腐蚀 腐蚀电化学因素 协同效应 

分 类 号：TG172.9[金属学及工艺—金属表面处理]