铝青铜在不同流速海水泥浆下的冲刷腐蚀行为  

Erosion-Corrosion Behavior of Aluminum Bronze under Different Flow Velocities of Seawater Slurry

作　　者：彭昊 张昭[2] 陈思安 陈纳 赵飞燕 朱本峰 卫国英[1] PENG Hao;ZHANG Zhao;CHEN Sian;CHEN Na;ZHAO Feiyan;ZHU Benfeng;WEI Guoying(China Jiliang University,Hangzhou 310018,China;Zhejing University,Hangzhou 310018,China)

机构地区：[1]中国计量大学,杭州310018 [2]浙江大学,杭州310018

出　　处：《腐蚀与防护》2022年第12期11-20,共10页Corrosion & Protection

基　　金：国家自然科学基金(51771173,52171083)。

摘　　要：通过扫描电镜、电化学阻抗谱和电化学噪声和腐蚀测试,研究了铝青铜在静态海水、2m/s和4m/s海水泥浆下的冲刷腐蚀行为。结果表明:在静态海水中,腐蚀前期铝青铜表面以点蚀为主,腐蚀后期铝青铜表面腐蚀产物的积累使腐蚀性粒子传输困难,电化学腐蚀速率逐渐降低;在2m/s海水冲刷下,铝青铜表面点蚀较严重,腐蚀主要受扩散控制,腐蚀产物的脱落使其腐蚀速率增大;在4m/s海水冲刷下,腐蚀初期铝青铜表面以点蚀为主,受扩散影响,腐蚀后期,成核生长能量上升,铝青铜的腐蚀速率先降低后保持稳定。The erosion corrosion behaviors of an aluminum bronze in static seawater,2 m/s and 4 m/s seawater slurry were studied through scanning electron microscopy,electrochemical impedance spectroscopy and electrochemical noise and corrosion tests.The results showed that in static seawater,the surface of aluminum bronze was mainly pitting in the early stage of corrosion,and the accumulation of corrosion products on the surface of aluminum bronze in the later stage made it difficult for corrosive particles to transport,and the electrochemical corrosion rate gradually decreased.Under 2 m/s seawater erosion,the surface pitting of aluminum bronze was serious,corrosion was mainly controlled by diffusion,and the corrosion rate increased due to the shedding of corrosion products.Under 4 m/s seawater erosion,the surface of aluminum bronze was mainly pitting in the initial stage of corrosion,and the energy of nucleation zone increased at the later stage of corrosion due to diffusion,and the corrosion rate of aluminum bronze firstly decreased and then remained stable.

关 键 词：铝青铜 冲刷腐蚀 电化学噪声 点蚀 

分 类 号：TG174[金属学及工艺—金属表面处理]