DOI:10.11973/fsyfh-202212003铝青铜在不同流速海水泥浆下的冲刷腐蚀行为彭昊1,张昭2,陈思安1,陈纳1,赵飞燕1,朱本峰1,2,卫国英1(1.中国计量大学,杭州310018;2.浙江大学,杭州310018)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。关键词:铝青铜;冲刷腐蚀;电化学噪声;点蚀中图分类号:TG174文献标志码:A文章编号:1005-748X(2022)12-0011-10Erosion-CorrosionBehaviorofAluminumBronzeunderDifferentFlowVelocitiesofSeawaterSlurryPENGHao1,ZHANGZhao2,CHENSian1,CHENNa1,ZHAOFeiyan1,ZHUBenfeng1,2,WEIGuoying1(1.ChinaJiliangUniversity,Hangzhou310018,China;2.ZhejingUniversity,Hangzhou310018,China)Abstract:Theerosioncorrosionbehaviorsofanaluminumbronzeinstaticseawater,2m/sand4m/sseawaterslurrywerestudiedthroughscanningelectronmicroscopy,electrochemicalimpedancespectroscopyandelectrochemicalnoiseandcorrosiontests.Theresultsshowedthatinstaticseawater,thesurfaceofaluminumbronzewasmainlypittingintheearlystageofcorrosion,andtheaccumulationofcorrosionproductsonthesurfaceofaluminumbronzeinthelaterstagemadeitdifficultforcorrosiveparticlestotransport,andtheelectrochemicalcorrosionrategraduallydecreased.Under2m/sseawatererosion,thesurfacepittingofaluminumbronzewasserious,corrosionwasmainlycontrolledbydiffusion,andthecorrosionrateincreasedduetothesheddingofcorrosionproducts.Under4m/sseawatererosion,thesurfaceofaluminumbronzewasmainlypittingintheinitialstageofcorrosion,andtheenergyofnucleationzoneincreasedatthelaterstageofcorrosionduetodiffusion,andthecorrosionrateofaluminumbronzefirstlydecreasedandthenremainedstable.Keywords:aluminiumbronze;erosioncorrosion;electrochemicalnoise;pitting冲刷腐蚀是金属表面与腐蚀性流体之间高速...
