Q235钢在海口大气环境中自然暴露与加速条件下的初期腐蚀行为
Initial Corrosion Behavior of Q235 Steel under Natural Exposure andAccelerated Conditions in Haikou Atmospheric Environment
摘 要
在海口大气环境下对Q235钢进行为期180 d的自然暴露试验和喷洒质量分数3.1%NaCl溶液的加速自然暴露试验,通过腐蚀形貌、腐蚀深度以及腐蚀后拉伸性能的对比,研究了加速条件对该钢初期腐蚀行为的影响。结果表明:试验钢朝天面比朝地面的腐蚀速率更大,喷洒NaCl溶液对腐蚀的加速效应显著;随试验时间的延长,锈层对基体的保护作用增强,试验钢的腐蚀速率减小,加速自然暴露工况下生成的锈层保护作用更强;2种工况下试验钢的拉伸性能均随腐蚀质量损失率的增大而降低,自然暴露和加速自然暴露工况下降低程度最大的分别为弹性模量和断后伸长率;自然暴露工况腐蚀对拉伸性能的削弱效果高于加速自然暴露工况下,其中对弹性模量削弱效果的差异高达14倍。
暴露试验
加速效应
腐蚀形貌
腐蚀质量损失
拉伸性能
Q235 steel
exposure test
acceleration effect
corrosion morphology
corrosion mass-loss
tensile property
Abstract
Natural exposure tests and accelerated natural exposure tests by spraying 3.1wt% NaCl solution were carried out on Q235 steel in Haikou atmospheric environment for 180 d. The effect of acceleration conditions on the initial corrosion behavior of the steel was studied by comparing the corrosion morphology, corrosion depth and tensile properties after corrosion. The results show that the corrosion rate of the test steel facing upward the ground was higher than facing toward the ground. Spraying NaCl solution had a significant acceleration effect on corrosion. With the extension of time, the corrosion rate of the test steel decreased due to the improvement of the protective effect of the rust layer on the matrix, and the protective effect of the rust layer formed under the accelerated natural exposure condition was stronger. The tensile properties of the test steel under both conditions decreased with the increase of corrosion mass loss rate, and under natural exposure and accelerated natural exposure conditions, the elastic modulus and percentage elongation after fracture were the most reduced, respectively. The weakening effect of corrosion on the tensile properties under natural exposure condition was higher than that under accelerated natural exposure condition, and the difference of weakening effect on elastic modulus was up to 14 times.
中图分类号 TU5111.3 DOI 10.11973/jxgccl202310002
所属栏目 试验研究
基金项目 海南省自然科学基金资助项目(522RC613,520QN230);国家自然科学基金资助项目(52208312);国家重点研发计划项目(2019YFD1101003)
收稿日期 2023/4/23
修改稿日期 2023/9/4
网络出版日期
作者单位点击查看
联系人作者秦术杰讲师
备注王欣(1998-),男,山西临汾人,硕士研究生
引用该论文: WANG Xin,QIN Shujie. Initial Corrosion Behavior of Q235 Steel under Natural Exposure andAccelerated Conditions in Haikou Atmospheric Environment[J]. Materials for mechancial engineering, 2023, 47(10): 9～15
王欣,秦术杰. Q235钢在海口大气环境中自然暴露与加速条件下的初期腐蚀行为[J]. 机械工程材料, 2023, 47(10): 9～15
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参考文献
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【2】FELIU S,MORCILLO M,CHICO B.Effect of distance from sea on atmospheric corrosion rate[J].Corrosion,1999,55(9):883-891.
【3】王秀民,王培,孙阳超,等.Q235钢在模拟海洋大气环境中的耐蚀性研究[J].表面技术,2015,44(11):104-111. WANG X M,WANG P,SUN Y C,et al.Corrosion resistance of Q235 steel in simulated marine atmospheric environment[J].Surface Technology,2015,44(11):104-111.
【4】雷林,徐静雯.Q345钢关键腐蚀因子研究[J].全面腐蚀控制,2019,33(8):71-76. LEI L,XU J W.Study on key corrosion factors of Q345 steel[J].Total Corrosion Control,2019,33(8):71-76.
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【6】王志高,海潮,姜杰,等.Q235钢在德阳大气环境中腐蚀行为研究[J].中国腐蚀与防护学报,2021,41(6):871-876. WANG Z G,HAI C,JIANG J,et al.Corrosion behavior of Q235 steels in atmosphere at Deyang district for one year[J].Journal of Chinese Society for Corrosion and Protection,2021,41(6):871-876.
【7】刘雨薇,赵洪涛,王振尧.碳钢和耐候钢在南沙海洋大气环境中的初期腐蚀行为[J].金属学报,2020,56(9):1247-1254. LIU Y W,ZHAO H T,WANG Z Y.Initial corrosion behavior of carbon steel and weathering steel in Nansha marine atmosphere[J].Acta Metallurgica Sinica,2020,56(9):1247-1254.
【8】FUENTE D D L,DÍAZ I,SIMANCAS J,et al.Long-term atmospheric corrosion of mild steel[J].Corrosion Science,2011,53(2):604-617.
【9】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.
【10】陈露,李宁,徐善华,等.锈蚀钢材力学性能退化规律试验研究[J].工业建筑,2011,41(增刊1):652-654. CHEN L,LI N,XU S H,et al.Experimental study on the deterioration of mechanical properties of corroded steel[J].Industrial Construction,2011,41(S1):652-654.
【11】袁迎曙,贾福萍,蔡跃.锈蚀钢筋的力学性能退化研究[J].工业建筑,2000,30(1):43-46. YUAN Y S,JIA F P,CAI Y.Deterioration of mechanical behavior of corroded steel bar[J].Industrial Construction,2000,30(1):43-46.
【12】吴庆,袁迎曙.锈蚀钢筋力学性能退化规律试验研究[J].土木工程学报,2008,41(12):42-47. WU Q,YUAN Y S.Experimental study on the deterioration of mechanical properties of corroded steel bars[J].China Civil Engineering Journal,2008,41(12):42-47.
【13】邱斌,徐善华.锈蚀钢板力学性能的退化规律[J].机械工程材料,2014,38(10):60-63. QIU B,XU S H.Deterioration law of mechanical properties of corroded steel plates[J].Materials for Mechanical Engineering,2014,38(10):60-63.
【14】孙维章,梁宋湘,罗建群.锈蚀钢筋剩余承载能力的研究[J].水利水运工程学报,1993(2):169-179. SUN W Z,LIANG S X,LUO J Q.Study on remanent load-bearing capacity of corroded reinforcing steel[J].Hydro-Science and Engineering,1993(2):169-179.
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【16】袁迎曙,余索.锈蚀钢筋混凝土梁的结构性能退化[J].建筑结构学报,1997,18(4):51-57. YUAN Y S,YU S.Deterioration of structural behavior in corroded reinforced concrete beam[J].Journal of Building Structures,1997,18(4):51-57.
【17】杨大宁,汪川,王振尧,等.海南省变电站大气腐蚀调查[J].腐蚀科学与防护技术,2015,27(6):617-620. YANG D N,WANG C,WANG Z Y,et al.Investigation on atmospheric corrosion of substation in Hainan Province[J].Corrosion Science and Protection Technology,2015,27(6):617-620.
【18】WANG J,WANG Z Y,KE W.Characterisation of rust formed on carbon steel after exposure to open atmosphere in Qinghai salt lake region[J].Corrosion Engineering,Science and Technology,2012,47(2):125-130.
【19】MORCILLO M,CHICO B,ALCÁNTARA J,et al.Atmospheric corrosion of mild steel in chloride-rich environments.Questions to be answered[J].Materials and Corrosion,2015,66(9):882-892.
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【21】CHEN Y Y,TZENG H J,WEI L I,et al.Corrosion resistance and mechanical properties of low-alloy steels under atmospheric conditions[J].Corrosion Science,2005,47(4):1001-1021.
【22】HOU W,LIANG C.Eight-year atmospheric corrosion exposure of steels in China[J].Corrosion,1999,55(1):65-73.
【23】宋子博,王智春,王建国,等.Q235钢在冀北地区的大气腐蚀行为[J].机械工程材料,2021,45(6):46-51. SONG Z B,WANG Z C,WANG J G,et al.Atmospheric corrosion behavior of Q235 steel in northern Hebei region[J].Materials for Mechanical Engineering,2021,45(6):46-51.
【24】李慧艳,方月华,肖葵,等.碳钢在吐鲁番干热大气环境中的腐蚀行为[J].腐蚀科学与防护技术,2014,26(5):407-412. LI H Y,FANG Y H,XIAO K,et al.Corrosion behavior of carbon steels in hot and dry atmosphere environment at Turpan area[J].Corrosion Science and Protection Technology,2014,26(5):407-412.
【25】徐善华,王皓,苏磊.中性盐雾腐蚀环境中Q235钢板力学性能的退化规律[J].机械工程材料,2016,40(5):86-91. XU S H,WANG H,SU L.Degradation law of mechanical properties of Q235 steel plate in neutral salt spray corrosion environment[J].Materials for Mechanical Engineering,2016,40(5):86-91.
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