盐雾下Q235钢腐蚀特性及基于VIC-3D的拉伸性能研究  

Corrosion characteristics of Q235 steel under salt spray and tensile performance based on VIC-3D

作　　者：储宵宵 王珍珍 王伟 周智 CHU Xiaoxiao;WANG Zhenzhen;WANG Wei;ZHOU Zhi(School of Civil Engineering and Architecture,Hainan University,Haikou 570228,China)

机构地区：[1]海南大学土木建筑工程学院,海南海口570228

出　　处：《海南大学学报(自然科学版中英文)》2025年第1期33-40,共8页Natural Science of Hainan University

基　　金：海南省院士创新平台项目(YSPTZX202006)。

摘　　要：通过中性盐雾箱对Q235钢连续喷雾1、3、7、21和42 d,对比分析了Q235钢腐蚀后的宏/微观形貌变化、质量损失、表面应变场变化以及各力学性能指标(弹性模量、屈服强度、抗拉强度,断后应变)随失重率的退化规律,研究了不同腐蚀时间对Q235钢的影响。结果表明,盐雾作用加速了钢材的锈层沟壑形貌形成及脱落进程,使微观形貌由稀疏点蚀状向麻点状,再向蜂窝状发展;平均腐蚀速率随着盐雾时间先减小后增大;各力学性能指标与失重率呈线性关系;随着腐蚀时间延长,高应变区域变得更加分散,表面应变场的不均匀性加剧,在弹性阶段和强化阶段尤为明显;盐雾作用会降低断裂阶段应变差值,使材料变脆,宏观表现为断裂形态由斜断裂向阶梯断裂转变。In the report,the continuous spraying of Q235 steel for 1,3,7,21,and 42 d with a neutral salt spray tank were performed to compare and analyze the macro/micro morphology changes,mass loss,surface strain field changes,and the degradation law of various mechanical properties(elastic modulus,yield strength,tensile strength,and strain after fracture)with the weight loss rate of Q235 steel after corrosion.The effects of the corrosion time on Q235 steel were also studied.The results showed that salt spray accelerated the formation and shedding process of the rust layer,the microstructure developed from sparse pitting to pitting,and then to honeycomb.The average corrosion rate decreased firstly,and then increased with the salt spray time.The mechanical properties had a linear relationship with the weight loss rate.With the extension of corrosion time,the high strain area became more dispersed,the surface strain field became more uneven,especially in the elastic stage and the strengthening stage.Salt spray reduced the strain difference at the fracture stage, and made the material brittle, and the macro fracture morphology changed from inclined fracture to stepfracture.

关 键 词：Q235钢 表面形貌 VIC-3D技术 拉伸性能 

分 类 号：S932.4[农业科学—渔业资源]