基于阵列电极技术研究藤壶附着对Q235钢腐蚀行为的影响  

Effect of Barnacle Adhesion on Corrosion Behavior of Q235 Steel

作　　者：胡杰珍[1] 上官桔钰 邓培昌 冯绮蓝 王贵[1] 王沛林 HU Jiezhen;SHANGGUAN Juyu;DENG Peichang;FENG Qilan;WANG Gui;WANG Peilin(College of Mechanical Engineering,Guangdong Ocean University,Zhanjiang 524088,China;College of Chemistry and Environment,Guangdong Ocean University,Zhanjiang 524088,China)

机构地区：[1]广东海洋大学机械工程学院,湛江524088 [2]广东海洋大学化学与环境学院,湛江524088

出　　处：《中国腐蚀与防护学报》2023年第5期1145-1150,共6页Journal of Chinese Society For Corrosion and Protection

基　　金：广东省自然科学基金(2021A1515012129);湛江市科技发展专项(2022A01029)。

摘　　要：以Q235钢为研究材料,经实海挂样,藤壶附着后,利用阵列电极技术、线性极化、电化学阻抗谱及腐蚀形貌观察等相结合的方法,分析藤壶附着对碳钢腐蚀行为的影响,探讨藤壶附着下碳钢的腐蚀机理。结果表明,藤壶加剧碳钢时空二维的非均匀腐蚀:藤壶活体附着造成碳钢低腐蚀电位(低25 mV)、低腐蚀电流(低79%)的“双低”腐蚀特征,抑制碳钢腐蚀;藤壶脱落后,残存底壳阻隔性快速下降,加速碳钢腐蚀;藤壶附着导致碳钢最大偶接电位差为25 mV,最大电偶电流达到41.6μA·cm^(-2)。The effect of the adhesive barnacles,as a common fouling organism,on the corrosion behavior of Q235 steel was examined via immersion testing in natural seawater of depth 15 m at Zhanjiang Bay.After immersion in seawater for 15 and 30 d respectively,the tested steels were characterized by means of wire beam electrode,linear polarization,electrochemical impedance spectroscopy and surface corrosion morphology observation etc.The results show that after immersion for one month in seawater,barnacles are naturally attached on the steel surface.The barnacle adhesion on the carbon steel could intensify its non-uniform corrosion,in other word,the carbon steel suffered from non-uniform corrosion with lower corrosion potential by 25 mV and lower corrosion current density by 79%.After the barnacle falls off,the barrier effect of the remaining bottom shell will drop rapidly,and the corrosion rate of carbon steel will accelerate.In addition,due to the non-uniform corrosion of carbon steel caused by barnacle adhesion,the maximum potential difference of coupling is 25 mV,and the maximum galvanic current reaches 41.6μA·cm^(-2).

关 键 词：污损生物 Q235钢 腐蚀 阵列电极 电化学阻抗谱 

分 类 号：TG172[金属学及工艺—金属表面处理]