船用钢板材料在淡水环境中初期腐蚀行为  

Initial Corrosion Behaviors of Ship Steel Plate in Fresh Water Environment

作　　者：郝张科 陈志飚[3] 张东 潘莹[1,2] 周学杰 HAO Zhang-ke;CHEN Zhi-biao;ZHANG Dong;PAN Ying;ZHOU Xue-jie(Wuhan Research Institute of Materials Protection, Wuhan 430030, China;State Key Laboratory of Special Surface Protection Materials and Application Technology, Wuhan 430030, China;Wuhan Institute of Specification of China classification society, Wuhan 430030, China)

机构地区：[1]武汉材料保护研究所,武汉430030 [2]特种表面保护材料及应用技术国家重点试验室,武汉430030 [3]中国船级社武汉规范研究所,武汉430030

出　　处：《装备环境工程》2017年第9期73-79,共7页Equipment Environmental Engineering

基　　金：国家科技基础条件平台项目(2005DKA10400)

摘　　要：目的研究船用钢板材料在长江淡水环境中的初期腐蚀行为。方法运用形貌分析、腐蚀质量损失、XRD、开路电位、极化曲线等方法研究Q235B和CCSA两种船用钢板材料在室外长江淡水环境中不同暴露方式(水面大气、半浸、全浸)及不同浸泡时间(0.5,1 a)腐蚀行为;室内长江淡水环境不同暴露方式(半浸、全浸)浸泡768 h内的腐蚀行为;室内长江淡水环境全浸泡下在不同时间(0~14 d)的电化学腐蚀行为。结果两种船用钢板材料在武汉长江淡水中腐蚀严重,半浸泡环境下腐蚀速率最大,达到100μm/a,水面区大气腐蚀速率最小,腐蚀速率为30μm/a左右,全浸区腐蚀速率为80μm/a左右,1 a和0.5 a的腐蚀速率相近,CCSA耐蚀性优于Q235B。室内长江淡水浸泡环境下两种船用钢板材料腐蚀电位随时间而降低,2d后趋于稳定;半浸泡环境下腐蚀速率大于全浸区;极化曲线说明浸泡2 d后,腐蚀速率降低且趋于稳定。结论 CCSA耐蚀性优于Q235B,半浸泡环境下腐蚀最严重,其次为全浸区,水面大气环境腐蚀最小。Objective To study initial corrosion behaviors of ship steel plate material in fresh water environment of theYangtze River.Methods Several methods including morphology analysis,weight loss analysis,XRD,open circuit potentialand polarization curves were used to study corrosion behaviors of Q235B and CCSA in different exposure modes(surface water,semi immersion,full immersion)and different soaking time(0.5a,1a)in outdoor fresh water environmentof the Yangtze River;corrosion behaviors in different exposure conditions(semi immersion and full immersion)in indoorfresh water environment of the Yangtze River in768h;electrochemical corrosion behaviors of indoor fresh water environmentat different times(0-14d).Results Two kinds of ship steel plate materials suffered from serious corrosions in theWuhan Section of the Yangtze River.The corrosion rate in the semi immersion environment was the largest,which was upto100μm/a;the corrosion rate in the water surface area was the smallest,which was about30μm/a and the whole immersion zone was about80μm/a;the corrosion resistance of CCSA was better than that of Q235B and the corrosion rate wassimilar between1and0.5years.The corrosion potential of two kinds of marine steel plates in the fresh water immersionenvironment of Yangtze River decreased with time,and tended to be stable2days later.The corrosion rate in the semiimmersion environment was greater than that of the full immersion zone.The polarization curves showed that after2daysof immersion,the corrosion rate decreased and tended to be stable.Conclusion The corrosion resistance of CCSA is betterthan that of Q235B.The corrosion is the most serious in the semi immersion environment,followed by the total immersionzone,and the minimum environmental corrosion in the water surface.

关 键 词：船用钢板 淡水环境 腐蚀 

分 类 号：TJ04[兵器科学与技术—兵器发射理论与技术] TG172[金属学及工艺—金属表面处理]