10CrNi3MoV船用钢港口环境腐蚀行为对比研究
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摘要
目的对比研究10CrNi3MoV船用钢在我国黄海、东海和南海海域具有代表性的港口海水环境中的腐蚀行为。方法在青岛、舟山和三亚港口进行10CrNi3MoV船用钢的实海暴露实验,通过腐蚀形貌观察、腐蚀速率和点蚀深度测量,结合各海域环境因素的监测和腐蚀产物成分的XRD分析,研究材料暴露0.5a的腐蚀规律和腐蚀机制。结果 10CrNi3MoV钢在青岛港口主要发生均匀腐蚀,在舟山和三亚港口以点蚀为主要腐蚀形式。10CrNi3MoV钢腐蚀速率受温度、盐度、溶氧量和泥沙冲刷综合作用的影响,随港口纬度的降低,材料腐蚀速率增大。附着海生物是影响10CrNi3MoV钢点蚀的重要因素,材料在附着率高的三亚和舟山港口具有更高的点蚀深度。结论附着区与非附着区形成的电偶效应使阴阳极反应界面分离,具有保护性的α-FeOOH的阴极去极化加快了附着海生物闭塞区的阳极溶解。
Objective To comparatively research corrosion behaviors of 10 CrNi3 MoV low alloy steel in the marine environment of typical harbors of the Huanghai Sea, the East China Sea and the South China Sea. Methods The field corrosion tests of 10 CrNi3 MoV low alloy steel were performed in the harbor seawater of Qingdao, Zhoushan and Sanya. The observation of the corrosion morphology and the measurement of the corrosion rate and pitting depth were conducted. Combined with the monitoring of the marine environment factors and the XRD results of the corrosion product, the corrosion mechanism of 10 CrN i3 Mo V steel was discussed. Results 10 CrN i3 Mo V steel experienced mainly general corrosion in the Qingdao harbor, while pitting was the major corrosion form in Zhoushan and Sanya. The corrosion rate of the steel was influenced under the mixed effect of seawater temperature, salinity, dissolved oxygen concentration and sediment erosion. With the decrease of the harbor latitude, the corrosion rate of the steel increased. The attached fouling organism was a key factor that affected the pittingbehavior of the steel. The steel had higher pitting depth in the harbor of Zhoushan and Sanya where the adhesion rate of the fouling organism was high. Conclusion The galvanic couple effect formed between the adhesion region and the non-attached region caused the separation of the interface between the cathodic and anodic reaction. The anodic dissolution in the occluded area beneath the attached organism is accelerated by the cathodic depolarization of the protective α-FeOOH product.
Objective To comparatively research corrosion behaviors of 10 CrNi3 MoV low alloy steel in the marine environment of typical harbors of the Huanghai Sea, the East China Sea and the South China Sea. Methods The field corrosion tests of 10 CrNi3 MoV low alloy steel were performed in the harbor seawater of Qingdao, Zhoushan and Sanya. The observation of the corrosion morphology and the measurement of the corrosion rate and pitting depth were conducted. Combined with the monitoring of the marine environment factors and the XRD results of the corrosion product, the corrosion mechanism of 10 CrN i3 Mo V steel was discussed. Results 10 CrN i3 Mo V steel experienced mainly general corrosion in the Qingdao harbor, while pitting was the major corrosion form in Zhoushan and Sanya. The corrosion rate of the steel was influenced under the mixed effect of seawater temperature, salinity, dissolved oxygen concentration and sediment erosion. With the decrease of the harbor latitude, the corrosion rate of the steel increased. The attached fouling organism was a key factor that affected the pittingbehavior of the steel. The steel had higher pitting depth in the harbor of Zhoushan and Sanya where the adhesion rate of the fouling organism was high. Conclusion The galvanic couple effect formed between the adhesion region and the non-attached region caused the separation of the interface between the cathodic and anodic reaction. The anodic dissolution in the occluded area beneath the attached organism is accelerated by the cathodic depolarization of the protective α-FeOOH product.
引文
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[22]肖葵,董超芳,李晓刚,等.碳钢和耐候钢加速腐蚀实验研究[J].装备环境工程,2007,4(3):5-8.
[2]陈卓元,林志坚,宋文桑,等.东海、南海海域海洋环境因素研究[J].腐蚀与防护,2000,21(6):248-251.
[3]王相润,周玲玲,陈振进,等.海洋环境因素对钢腐蚀速度的影响[J].海洋科学,1988,12(1):31-34.
[4]傅晓蕾,马力,闫永贵,等.溶解氧浓度对船体钢在海水中腐蚀行为的影响[J].腐蚀与防护,2010,31(12):942-945.
[5]孙世斌.海洋石油平台用D36钢电化学腐蚀行为研究[J].全面腐蚀控制,2016,30(12):50-53.
[6]刘杰,李相波,王佳,等.阴极极化对人为破损907A涂层钢腐蚀行为的影响[J].装备环境工程,2010,7(3):1-5.
[7]YANG Da-zhang,LIU Jian-hua,E Xiao-xue,et al.Experimental Study of Composition and Influence Factors on Fouling of Stainless Steel and Copper in Seawater[J].Annals of Nuclear Energy,2016,94:767-772.
[8]LI Qing-yang,LI Wei,AN Mao-zhong.Sunlight Induced Photoelectrochemical Anticorrosion Effect of Corrosion Product Layers on Electrogalvanized Steel in Simulated Seawater[J].Electrochemistry Communications,2018,90:39-42.
[9]魏爱军,霍富永,胡志明,等.温度对A3钢在海水中电化学腐蚀的影响[J].腐蚀与防护,2008,29(10):605-606.
[10]MORCILLO M,CHICO B,MARIACA L,et al.Salinity in Marine Atmospheric Corrosion:Its Dependence on the Wind Regime Existing in the Site[J].Corrosion Science,2000,42(1):91-104.
[11]杨海洋,黄桂桥.环境因素对碳钢实海暴露初期腐蚀速率的影响[J].腐蚀与防护,2014,35(6):576-578.
[12]朱相荣,张启富.海水中钢铁腐蚀与环境因素的灰关联分析[J].海洋科学,2000,24(5):37-40.
[13]KALASHNIKOVA I,NUNEZ L,CORVO F.Corrosion Behavior of Metallic Materials in the Cuban Caribbean Sea[J].Corrosion Reviews,1995,13(2-4):261-296.
[14]朱相荣,郁春娟,张晶.Al合金海水腐蚀与环境因素的灰关联分析[J].腐蚀科学与防护技术,2001,13(1):9-11.
[15]BLACKWOOD D J,LIM C S,TEO S L M,et al.Macrofouling Induced Localized Corrosion of Stainless Steel in Singapore Seawater[J].Corrosion Science,2017,129:152-160.
[16]MESSANO L V R D,SATHLER L,REZNIK L Y,et al.The Effect of Biofouling on Localized Corrosion of the Stainless Steels N08904 and UNS S32760[J].International Biodeterioration and Biodegradation,2009,63(5):607-614.
[17]张盾,王毅,王鹏,等.海水环境生物腐蚀污损与防护[J].装备环境工程,2016,13(4):22-27.
[18]REFAIT P,GROLLEAU A M,JEANNIN M,et al.Localized Corrosion of Carbon Steel in Marine Media:Galvanic Coupling and Heterogeneity of the Corrosion Product Layer[J].Corrosion Science,2016,111:583-595.
[19]KAMIMURA T,HARA S,MIYUKI H,et al.Composition and Protective Ability of Rust Layer Formed on Weathering Steel Exposed to Various Environments[J].Corrosion Science,2006,48(9):2799-2812.
[20]YAMASHITA M,MIYUKI H,MATSUDA Y,et al.The Long Term Growth of the Protective Rust Layer Formed on Weathering Steel by Atmospheric Corrosion during a Quarter of a Century[J].Cheminform,1994,25(19):283-299.
[21]NEFF D,DILLMANN P,BELLOT-GURLET L,et al.Corrosion of Iron Archaeological Artefacts in Soil:Characterisation of the Corrosion System[J].Corrosion Science,2005,47(2):515-535.
[22]肖葵,董超芳,李晓刚,等.碳钢和耐候钢加速腐蚀实验研究[J].装备环境工程,2007,4(3):5-8.