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材料导报  2025, Vol. 39 Issue (16): 24070041-9    https://doi.org/10.11896/cldb.24070041
  金属与金属基复合材料 |
热带海岛大气环境下Q235钢的腐蚀规律及GM(1,1)模型预测
秦术杰*, 王欣
海南大学土木建筑工程学院,海口 570228
Corrosion Law and GM(1,1) Model-based Prediction of Q235 Steel in Tropical Island Atmospheric Environment
QIN Shujie*, WANG Xin
School of Civil Engineering and Architecture, Hainan University, Haikou 570228, China
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摘要 Q235钢在我国海南岛及南海群岛应用时的腐蚀问题不容忽视。通过自然暴露试验及喷洒水雾、质量分数为3.1%和5%盐雾的加速试验,采用宏观形貌观察法、SEM、EDS、XRD、腐蚀失重法及拉伸试验等分析手段,对Q235钢在热带海岛大气环境下的腐蚀规律进行研究,并基于GM(1,1)模型对腐蚀钢材的力学性能进行预测和分析。结果表明:Q235钢腐蚀锈层的颜色和结构形式在不同工况下存在差异,水雾会加剧锈层与基体界面处的裂纹扩展,而盐雾会破坏锈层的致密性并加速锈层开裂。Q235钢腐蚀深度与腐蚀时间关系符合幂函数规律,盐雾对腐蚀质量损失的加速效果高于水雾。腐蚀12个月后,Q235钢的屈服强度、抗拉强度和断后伸长率在不同工况下的退化程度由低至高依次为:自然暴露＜水雾＜盐雾。GM(1,1)模型对腐蚀钢材的力学性能退化规律具有较好的预测精度,所有工况下的各力学性能的退化速率均随时间延长逐渐趋于平缓;自然暴露工况下的屈服强度、抗拉强度和断后伸长率的退化程度和速率均显著低于其他工况,而弹性模量在自然暴露和水雾工况下随时间的退化程度比较接近,但也显著低于盐雾工况。
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秦术杰
王欣
关键词:  Q235钢  热带海岛大气环境  腐蚀形貌  腐蚀失重  力学性能退化  预测模型    
Abstract: The corrosion of Q235 steel is a problem that can not be ignored in tropical island areas such as Hainan Island and the South China Sea Islands. Through natural exposure test, accelerated tests by spraying water mist and salt mist with mass fractions of 3.1% and 5%, adopting the methods including macroscopic morphology observation, SEM, EDS, XRD, corrosion weight loss and tensile tests, the corrosion law of Q235 steel in tropical island atmospheric environment was studied, and the mechanical properties of corroded steel were analyzed and predicted based on the GM(1, 1) model. The results show that the color and structural form of corrosion rust layer of Q235 steel vary for those under different conditions. Water mist exacerbates the crack expansion at the interface between the rust layer and the substrate, while salt mist destroys the compactness of the rust layer and accelerated its cracking progress. The law between corrosion depth of Q235 steel and time follows a power function. Salt mist has a greater accelerating effect on corrosion mass loss than water mist. After corrosion for 12 months, the degradation degrees of mechanical properties including yield strength, tensile strength and elongation after fracture of Q235 steel ranges from low to high are under natural exposure, water mist and salt mist conditions sequentially. The GM(1, 1) model exhibits a well accuracy in predicting the degradation of mechanical properties of corroded steel. The degradation rates of mechanical properties decrease gradually and level off with time under all test conditions. The degradation degree and rate of yield strength, tensile strength and elongation after fracture under natural exposure condition are significantly lower than those under other conditions. The degradation degree of elastic modulus with time under natural exposure and water mist conditions is similar, while they are significantly lower than those under salt spray conditions.
Key words:  Q235 steel    tropical island atmospheric environment    corrosion morphology    corrosion weight loss    mechanical property degradation    prediction model
出版日期:  2025-08-15      发布日期:  2025-08-15
ZTFLH:  TU5111.3  
基金资助: 国家自然科学基金(52208312);海南省自然科学基金(522RC613);国家重点研发计划(2019YFD1101003)
通讯作者:  秦术杰,博士,海南大学土木建筑工程学院副教授、博士研究生导师。目前主要从事建筑材料腐蚀与结构安全评估等方面的研究工作。qinshujie@hainanu.edu.cn   
引用本文:    
秦术杰, 王欣. 热带海岛大气环境下Q235钢的腐蚀规律及GM(1,1)模型预测[J]. 材料导报, 2025, 39(16): 24070041-9.
QIN Shujie, WANG Xin. Corrosion Law and GM(1,1) Model-based Prediction of Q235 Steel in Tropical Island Atmospheric Environment. Materials Reports, 2025, 39(16): 24070041-9.
链接本文:  
https://www.mater-rep.com/CN/10.11896/cldb.24070041  或          https://www.mater-rep.com/CN/Y2025/V39/I16/24070041
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