海洋工程用D36、F460和F690钢在模拟海水中的电化学腐蚀行为
Electrochemical Corrosion Behaviors of D36, F460 and F690 Steels for Offshore Engineering in Simulated Seawater
摘 要
研究了海洋工程用国产D36、F460和F690钢的显微组织，以及在20，50℃模拟海水（质量分数3.5% NaCl溶液）中的电化学腐蚀行为。结果表明：热机控制工艺轧制D36钢的显微组织为铁素体、珠光体和少量魏氏组织，经淬火+回火热处理的F460和F690钢的显微组织均为细小板条贝氏体；在NaCl溶液中，D36、F460和F690钢的耐腐蚀性能和抗点蚀能力依次增大；与20℃下的相比，3种试验钢在50℃下的自腐蚀电流密度明显增大，耐腐蚀性能降低；在NaCl溶液中长时间浸泡后，D36、F460和F690钢的表面腐蚀产物膜厚度依次降低，腐蚀产物膜内元素种类依次增多，3种试验钢整体上均呈现均匀腐蚀特征。
高强钢
电化学
腐蚀形貌
offshore engineering
high strength steel
electrochemistry
corrosion morphology
Abstract
Microstructures and electrochemical corrosion behaviors in simulated seawater (3.5wt%NaCl solution) at 20, 50℃ of domestic D36, F460 and F690 steels for marine engineering were studied. The results show that the microstructure of D36 steel rolled by thermo-mechanical control process consisted of ferrite, pearlite and a little widmanstatten structure. The microstructures of F460 and F690 steels after quenching and tempering treatment were both composed of fine bainite lath. In the NaCl solution, the corrosion resistance and pitting corrosion resistance of D36, F460 and F690 steels increased in turn. Compared with those at 20℃, the free corrosion current density at 50℃ of the three tested steels increased significantly, and the corrosion resistance decreased. After long-term immersion in the NaCl solution, the thicknesses of surface corrosion product film on D36, F460 and F690 steel decreased in turn, and the element type in the corrosion product film increased in turn. The three tested steels showed overall uniform corrosion characteristics.
中图分类号 TG172.5 DOI 10.11973/jxgccl201908006
所属栏目 材料性能及应用
基金项目 “挑战杯”竞赛支撑项目（TZ20180003）；江苏省大学生创新创业训练计划项目（201911276004Z）；大学生科技创新基金项目（TB201802033）；江苏省高等学校自然科学研究面上项目（18KJB130003）；国家自然科学基金青年科学基金资助项目（51801098）
收稿日期 2018/7/12
修改稿日期 2019/7/1
网络出版日期
作者单位点击查看
备注张振(1988-),男,河南周口人,讲师,博士
引用该论文: ZHANG Zhen,WANG Qi,ZHANG Caiyi,LU Xiaohui,HU Zhengfei,GAO Shan. Electrochemical Corrosion Behaviors of D36, F460 and F690 Steels for Offshore Engineering in Simulated Seawater[J]. Materials for mechancial engineering, 2019, 43(8): 27～34
张振,王琪,张才毅,芦晓辉,胡正飞,高珊. 海洋工程用D36、F460和F690钢在模拟海水中的电化学腐蚀行为[J]. 机械工程材料, 2019, 43(8): 27～34
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【2】张杰, 蔡庆伍, 樊艳秋, 等. 回火温度对E690海洋用钢组织和显微硬度的影响[J]. 材料热处理学报, 2012, 33(4):55-61.
【3】冯小明, 罗迪强, 孙乐飞, 等. 冷却速度对E690海洋平台用钢组织与性能的影响[J]. 金属热处理, 2016, 41(9):131-133.
【4】GUO J, YANG S W, SHANG C J, et al. Influence of carbon content and microstructure on corrosion behaviour of low alloy steels in a Cl- containing environment[J]. Corrosion Science, 2009, 51(2):242-251.
【5】ZHOU Y L, CHEN J, XU Y, et al. Effects of Cr, Ni and Cu on the corrosion behavior of low carbon microalloying steel in a Cl- containing environment[J]. Journal of Materials Science & Technology, 2013, 29(2):168-174.
【6】HAO X H, DONG J H, WEI J, et al. Effect of Cu on corrosion behavior of low alloy steel under the simulated bottom plate environment of cargo oiltank[J]. Corrosion Science, 2017,121:84-93.
【7】陈祥曦, 马力, 赵程, 等. 阴极保护电位对E460钢氢脆敏感性的影响[J]. 腐蚀与防护, 2015, 36(11):1026-1029.
【8】MA H C, LIU Z Y, DU C W, et al. Effect of cathodic potentials on the SCC behavior of E690 steel in simulated seawater[J]. Materials Science and Engineering:A, 2015, 642:22-31.
【9】MA H C, LIU Z Y, DU C W, et al. Comparative study of the SCC behavior of E690 steel and simulated HAZ microstructures in a SO2-polluted marine atmosphere[J]. Materials Science and Engineering:A, 2016, 650:93-101.
【10】贾月彩, 牛见青, 刘东升. 船板钢耐海洋大气腐蚀性能研究[J]. 上海金属, 2013, 35(1):26-30.
【11】马宏驰,杜翠薇,刘智勇,等. E36和E690钢在模拟海水中的腐蚀行为对比研究[J]. 腐蚀科学与防护技术,2016,28(1):27-32.
【12】武会宾,尚成嘉,赵运堂,等.回火对低碳贝氏体钢组织稳定性及力学性能的影响[J]. 钢铁,2005,40(3):62-65.
【13】LOU X Y, SINGH P M. Role of water, acetic acid and chloride on corrosion and pitting behaviour of carbon steel in fuel-grade ethanol[J]. Corrosion Science, 2010, 52(7):2303-2315.
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【21】MELCHERS R E. Effect of small compositional changes on marine immersion corrosion of low alloy steels[J]. Corrosion Science, 2004, 46(7):1669-1691.
【22】陶素芬,王福明, 于乔木,等.奥氏体化温度及时间对EQ70钢晶粒尺寸的影响[J].材料热处理学报,2013,34(11):42-47.
【23】张振, 胡正飞. 温度对P92耐热钢高温水中应力腐蚀开裂行为的影响[J]. 材料热处理学报, 2015, 36(8):121-125.
【24】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.
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