硅烷化处理工艺参数对建筑用6061铝合金耐蚀性的影响
Effect of Silanization Treatment Process Parameters on Corrosion Resistance of 6061 Aluminum Alloy for Building
摘 要
采用硅烷处理工艺在建筑用6061铝合金型材表面制备了硅烷涂层,并进行了工艺优化研究。采用电化学测试,对比分析了硅烷处理前后6061铝合金在0.025 mol/L硼酸钠+0.05 mol/L氢氧化钠混合溶液中的耐蚀性。结果表明:优化后的6061铝合金硅烷化处理工艺为硅烷化时间180 s、硅烷溶液pH 11、固化温度90 ℃;最佳硅烷化处理工艺得到的硅烷涂层的厚度约为90 nm,涂层均匀致密,与铝合金基体结合良好;硅烷化处理后6061铝合金的耐腐蚀性能明显优于硅烷化处理前,试样的阻抗值明显增大,表面接触角减小、黏附功增大。
硅烷化处理
工艺参数
耐蚀性
6061 aluminum alloy
silanization treatment
process parameter
corrosion resistance
Abstract
Silane coating was prepared on the surface of 6061 aluminum alloy profiles by silanization treatment process. The optimization of silane treatment process was studied. The corrosion resistances of 6061 aluminum alloy before and after silane treatment in 0.025 mol/L sodium borate + 0.05 mol/L sodium hydroxide mixed solution were compared and analyzed by electrochemical performance test method. The results show that the optimized silylation process of 6061 aluminum alloy was silylation time 180 s, silane solution pH 11, curing temperature 90 ℃. The thickness of silane coating obtained by the optimal silanization treatment process was about 90 nm, and the coating was uniform and dense, which had good bonding with the aluminum alloy substrate. The corrosion resistance of 6061 aluminum alloy after silanization treatment was obviously better than that before silanization treatment. The impedance value of the sample increased obviously, the surface contact angle decreased and the adhesion work increased.
中图分类号 TG174.4 DOI 10.11973/fsyfh-202303009
所属栏目 试验研究
基金项目 四川省教育厅自然科学研究项目(19ZB0072);四川省创新能力提升工程-青年基金专项(cxnlts-qnjj-202018)
收稿日期 2021/4/15
修改稿日期
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引用该论文: YU Gao,ZHOU Rui,LU Fenglian,WEI Yunman. Effect of Silanization Treatment Process Parameters on Corrosion Resistance of 6061 Aluminum Alloy for Building[J]. Corrosion & Protection, 2023, 44(3): 61
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【7】易俊兰,秦锐,吴宏亮,等. 化学转化处理时间对新型2198铝锂合金耐蚀性的影响[J]. 腐蚀与防护,2020,41(12):26-30.
【8】李海丰,任伊锦. 铝合金硅烷处理工艺及电泳漆膜配套性研究[J]. 涂层与防护,2020,41(12):53-58.
【9】ANDREATTA F,TURCO A,DE GRAEVE I,et al. SKPFM and SEM study of the deposition mechanism of Zr/Ti based pre-treatment on AA6016 aluminum alloy[J]. Surface and Coatings Technology,2007,201(18):7668-7685.
【10】DZHURINSKIY D V,DAUTOV S S,SHORNIKOV P G,et al. Surface modification of aluminum 6061-O alloy by plasma electrolytic oxidation to improve corrosion resistance properties[J]. Coatings,2020,11(1):4.
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【15】孙费梅,杨萍,易伟红. 铝合金基体上多层组合镀层的耐蚀性研究[J]. 电镀与精饰,2017,39(12):29-32.
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