| 摘要: |
| 为研究海洋浪溅区环境下高强钢及焊缝连接的腐蚀形貌特征和时变效应，通过微观扫描测试Q690高强钢及焊缝连接表面粗糙度参数，得到表面峰最大高度（Sp）、表面谷最大深度（Sv）、表面轮廓偏斜度（Ssk）及表面轮廓峭度（Sku）随腐蚀时间的演化规律，并进行回归分析与对比.结果表明：通过分析粗糙度参数随腐蚀时间的变化过程，以及对比Q690高强钢母材与焊缝连接扫描区域的差异性，能准确地判断其腐蚀程度及特征，从而为海洋环境下国产高强钢损伤评估提供新的途径. |
| 关键词: Q690高强钢 海洋浪溅区 微观扫描 焊缝连接 粗糙度参数 损伤评估 |
| DOI：10.3969/j.issn.1007-9629.2024.08.008 |
| 分类号:TU511.3 |
| 基金项目:国家自然科学基金资助项目（52008094）；江苏省自然科学基金资助项目（SBK2020040）；江苏省研究生科研与实践创新计划项目（KYCX23_0273，KYCX24_0367）；中央高校基本科研业务费专项资金资助项目（2242024k30065） |
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| Research on Roughness Parameters of High Strength Steel and Weld Joint in Marine Environment |
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WEI Huanhuan1,2,3, TANG Yiqun1,2, ZHANG Guangcai1, CHEN Chen3,4
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1.Key Laboratory of Concrete & Pre-stressed Concrete Structures of Ministry of Education， Southeast University， Nanjing 211189， China;2.Jiangsu Key Laboratory of Engineering Mechanics， Southeast University， Nanjing 211189， China;3.State Key Laboratory of Eco-Hydraulics in Northwest Arid Region of China， Xi’an University of Technology， Xi’an 710048， China;4.School of Civil Engineering， Xi’an University of Architecture & Technology， Xi’an 710054， China
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| Abstract: |
| The surface roughness parameters of Q690 high strength steel and weld joint specimens were assessed through microscopic scanning tests to investigate the dynamic changes in corrosion morphology characteristics of high strength steel（HSS） within the ocean splash zone corrosive environment. These investigations encompassed the analysis of parameters such as the maximum height of surface peaks Sp， the maximum depth of surface valleys Sv， the skewness of surface profiles Ssk， and the kurtosis of surface profiles Sku over varying periods of corrosion. Power function regression analyses and comparative assessments were conducted for each of these parameters. The results indicate that considering the differences in the scanning area of base material and weld joint of Q690 high strength steel， the corrosion degrees and characteristics can be accurately determined by analyzing the variation process of roughness parameters with corrosion time， so as to provide a new approach for damage assessment of domestically produced high strength steel in marine environments. |
| Key words: Q690 high strength steel ocean splash zone microscopic scanning weld joint roughness parameter damage assessment |
