Mao Shuqing *,an Yuexiang.Research on surface modification and property of architectural landscape steel structures[J].Plating & Finishing,2024,(4):51-58.[doi:10.3969/j.issn.1001-3849.2024.04.008]
建筑景观钢结构的表面改性设计与性能研究
- Title:
- Research on surface modification and property of architectural landscape steel structures
- Keywords:
- steel structure ; plasma spray coating ; chemical modification ; wear resistance ; corrosion resistance
- 分类号:
- TG174.4
- 文献标志码:
- A
- 摘要:
- 为了提升建筑景观钢结构的表面性能，采用等离子喷涂和化学修饰的方法在钢结构用 Q345B 钢基体表面制备了 4 种不同成分配比的（ Ni60+ Al 2 O 3 ）涂层，研究了粉末成分配比对涂层物相组成、形貌、硬度、耐磨性和耐蚀性的影响。结果表明， 4 种涂层表面未见异常凹坑或者裂纹，局部存在未完全熔化的颗粒和微孔；涂层表面粗糙度会随着 Ni60 粉末质量分数的增加而减小。涂层 A （ 10%Ni60 ）、涂层 B （ 20%Ni60 ）、涂层 C （ 30%Ni60 ）和涂层 D （ 40%Ni60 ）与钢结构基体的结合强度分别为 26 、 37 、 50 和 56 MPa ，涂层区和界面区的硬度都高于钢结构基体，涂层 C 的涂层区硬度最高；当 Ni60 粉末质量分数从 10% 增加至 40% ，涂层的磨损率先减后增，涂层 C 的磨损率最小，具有最佳耐磨性能。化学修饰处理可以提升 Q345B 钢基体表面涂层的耐蚀性能，且当 Ni60 粉末质量分数从 10% 增加至 40% ，化学修饰后涂层的腐蚀电位先正移后负移、腐蚀电流密度先减后增、阻抗弧半径先增后减，化学修饰后涂层 C 的腐蚀电位最正、腐蚀电流密度最小、阻抗弧半径最大，涂层 C 具有最佳耐蚀性能。
- Abstract:
- ： In order to improve the surface performance of architectural landscape steel structures ， four different composition ratios of （ Ni60+Al 2 O 3 ） coatings were prepared on the Q345B steel substrate surface using plasma spraying and chemical modification methods. The effects of powder composition ratios on the phase composition ， morphology ， hardness ， wear resistance ， and corrosion resistance of the coatings were studied. The results showed that there were no abnormal pits or cracks on the surface of the four coatings ， and there were partially melted particles and micropores in local areas ； The surface roughness of the coating will decrease as the mass fraction of Ni60 powder increases ， the bonding strength between coating A （ 10% Ni60 ）， coating B （ 20% Ni60 ）， coating C （ 30% Ni60 ）， and coating D （ 40% Ni60 ） with the steel structure substrate is 26 ， 37 ， 50 ， and 56 MPa ， respectively. The hardness of the coating area and interface area is higher than that of the steel structure substrate ， and the coating area of coating C has the highest hardness ； When the mass fraction of Ni60 powder increases from 10% to 40% ， the wear of the coating first decreases and then increases ， and the wear rate of coating C is the smallest ， with the best wear resistance. Chemical modification treatment can improve the corrosion resistance of the surface coating on Q345B steel substrate. When the mass fraction of Ni60 powder in creases from 10% to 40% ， the corrosion potential of the chemically modified coating first shifts positive and then negative ， the corrosion current density first decreases and then increases ， and the impedance arc radius first increases and then decreases. After chemical modification ， the corrosion potential of coating C is the most positive ， the corrosion current density is the smallest ， and the impedance arc radius is the largest ， coating C has the best corrosion resistance performance.
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备注/Memo
收稿日期： 2023-12-01 修回日期： 2024-01-16 作者简介： 茅舒青（ 1986 —），女，博士，讲师， email ： 188817869@qq.com 基金项目： 浙江省重点研发计划项目（ 2022C02013 ）?/html>