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材料导报  2023, Vol. 37 Issue (18): 22010063-6    https://doi.org/10.11896/cldb.22010063
  金属与金属基复合材料 |
一步法反应时间对AZ91镁合金表面超疏水涂层耐腐蚀性的影响
李少鹏, 王德芳, 谢文玲*, 李秀兰, 李轩
四川轻化工大学机械工程学院,四川 自贡 643000
Effect of Reaction Time of One-step on Corrosion Resistance of Superhydrophobic Coatings on AZ91 Magnesium Alloys
LI Shaopeng, WANG Defang, XIE Wenling*, LI Xiulan, Li Xuan
College of Mechanical Engineering, Sichuan University of Science and Engineering, Zigong 643000, Sichuan, China
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摘要 利用硬脂酸乙醇和硫酸锌溶液,采用一步法(水热刻蚀和修饰结合)在AZ91镁合金表面制备了超疏水涂层,研究了反应时间对其疏水性和耐腐蚀性的影响。用X射线光电子衍射仪(XRD)、傅里叶转换红外射线(FTIR)、扫描电子显微镜(SEM)及EDS谱图分析涂层的相组成和微观形貌,利用接触角和极化曲线测试其疏水性和耐腐蚀性。随反应时间延长,涂层的接触角先增大再减小,其中反应7 h制备的涂层接触角达到最大值154.2°,为超疏水涂层,其腐蚀电流密度最低,较镁合金基体下降了3个数量级,阻抗较镁合金基体提高了5个数量级,耐腐蚀性显著提高。
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李少鹏
王德芳
谢文玲
李秀兰
李轩
关键词:  AZ91镁合金  超疏水涂层  一步法  耐腐蚀性    
Abstract: One-step method combined hydrothermal etching and modification using stearic acid ethanol and zinc sulfate solution was used to prepare superhydrophobic coatings on the AZ91 magnesium alloys. The effect of reaction times of the one-step method on hydrophobicity and corrosion resistance of superhydrophobic coatings was studied. The phase composition and microstructure of coatings were analyzed by X-ray photoelectron diffractometer (XRD), Fourier transform infrared ray (FTIR), scanning electron microscope (SEM) and EDS spectrum. And the hydrophobicity and corrosion resistance were characterized by contact angle and polarization curve. With the increase of reaction time, the contact angles of the coatings first increased and then decreased. The coating prepared with 7 h of action time had the maximum contact angles of 154.2°, which was a superhydrophobic coating, and the coated sample had the lowest corrosion current density and the biggest impedance, which was 3 orders of magnitude lower and 5 orders of magnitude higher than those of uncoated magnesium alloy matrix, respectively. So, the corrosion resistance of the magnesium alloy was significantly improved.
Key words:  AZ91 magnesium alloy    superhydrophobic coating    one-step process    corrosion resistance
出版日期:  2023-09-25      发布日期:  2023-09-18
ZTFLH:  TG178  
基金资助: 过程装备与控制工程四川省高校重点实验室项目(GK202011);大学生创新创业项目(cx2020176)
通讯作者:  *谢文玲,四川轻化工大学机械工程学院副教授、研究研究生导师。2000年西华大学塑性成形工艺与设备专业本科毕业后到四川轻化工大学工作至今,2007年四川大学材料加工工程专业硕士毕业,2022年西南大学化学(洁净能源科学)专业博士毕业。目前主要从事金属表面改性、金属材料相变等方面的研究工作。发表论文20余篇,包括Surface & Coatings Technology,Vacuum,《金属热处理》《铸造技术》《热加工工艺》等,授权国家发明专利5项。zsyxwl@126.com   
作者简介:  李少鹏,2015年6月于山西大同大学获得工学学士学位。现为四川轻化工大学机械工程学院研究生,目前主要研究领域为镁合金表面防护涂层。
引用本文:    
李少鹏, 王德芳, 谢文玲, 李秀兰, 李轩. 一步法反应时间对AZ91镁合金表面超疏水涂层耐腐蚀性的影响[J]. 材料导报, 2023, 37(18): 22010063-6.
LI Shaopeng, WANG Defang, XIE Wenling, LI Xiulan, Li Xuan. Effect of Reaction Time of One-step on Corrosion Resistance of Superhydrophobic Coatings on AZ91 Magnesium Alloys. Materials Reports, 2023, 37(18): 22010063-6.
链接本文:  
http://www.mater-rep.com/CN/10.11896/cldb.22010063  或          http://www.mater-rep.com/CN/Y2023/V37/I18/22010063
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