极地冰覆盖下变温和恒温对高强钢腐蚀影响研究  

Effect of Variable-and Constant-Temperature on Corrosion Behavior of High Strength Steel under Polar Ice Cover

作　　者：彭文山 辛永磊 温杰平 侯健 孙明先 PENG Wenshan;XIN Yonglei;WEN Jieping;HOU Jian;SUN Mingxian(National Key Laboratory of Marine Corrosion and Protection,Luoyang Ship Material Research Institute,Qingdao 266237,China;Marine Chemical Research Institute,Qingdao 266001,China)

机构地区：[1]中国船舶集团有限公司第七二五研究所,海洋腐蚀与防护全国重点实验室,青岛266237 [2]海洋化工研究院有限公司,青岛266001

出　　处：《中国腐蚀与防护学报》2025年第3期821-826,共6页Journal of Chinese Society For Corrosion and Protection

摘　　要：极地气候环境特殊,金属材料可能长期暴露在冰层覆盖下,为研究冰覆盖腐蚀条件下恒温和变温环境对高强钢腐蚀的影响,采用室内模拟实验。在-45~-5℃温度下进行1个月的周期性冰覆盖变温腐蚀测试,与同周期恒温条件下-5和-45℃的腐蚀行为进行比较。结果表明:冰层覆盖下,随着温度升高,高强钢的腐蚀速率增加;在冰层覆盖下,温度的变化对高强钢的腐蚀形貌影响较小;电化学测试发现高强钢的容抗弧半径较大,变化范围较小,-5℃低温条件下,其自腐蚀电位最低,但是与变温条件下相差不大;XRD和拉曼光谱分析说明腐蚀产物由α-FeOOH、β-FeOOH、γ-FeOOH和Fe_(3)O_(4)/γ-Fe_(2)O_(3)构成,温度从-45℃到-45~-5℃,再到-5℃,腐蚀产物种类呈增加趋势。The polar climate environment is special,and metal materials may be exposed to ice cover for a long time.Herein,the effect of variable-and constant-temperature on the corrosion behavior of a Ni-Cr-Mo-V high-strength steel under ice cover conditions was studied.Therefore,an indoor simulation test procedure was proposed as follows:periodic corrosion tests beneath ice cover were conducted at variable temperatures ranging from-45 to-5 o C for one month,meanwhile the corrosion tests beneath ice cover at constant temperatures in the range of-5 and-45 o C were tacked as comparison.The results show that under the ice cover,the corrosion rate of high-strength steel increases with the increase of temperature;while the variable temperature has a relatively small impact on the corrosion morphology of high-strength steel;Electrochemical test results reveal that the capacitance arc radius of high-strength steel is relatively large,with a small range of variation.At low temperature-5 o C,its self-corrosion potential is the lowest,but the difference is not significant compared to those by variable temperature conditions;XRD and Raman spectroscopic analysis indicate that the corrosion products are composed ofα-FeOOH,β-FeOOH,γ-FeOOH,and Fe_(3)O_(4)/γ-Fe_(2)O_(3).The temperature ranges from-45 o C to-45--5 o C,and then to-5 o C,the spicies of phase for corrosion products are showing an increasing trerd.

关 键 词：极地环境 低温 高强钢 冰覆盖 大气腐蚀 腐蚀产物 

分 类 号：TG172.5[金属学及工艺—金属表面处理]