CHEN Tianli.Effect of Treatment Time on Corrosion Resistance of Lanthanum Salt Conversion Films on Hot Galvanized Plate Used in Construction[J].Plating & Finishing,2022,(7):24-29.[doi:10.3969/j.issn.1001-3849.2022.07.005]
处理时间对建筑用热镀锌板镧盐转化膜耐蚀性的影响
- Title:
- Effect of Treatment Time on Corrosion Resistance of Lanthanum Salt Conversion Films on Hot Galvanized Plate Used in Construction
- Keywords:
- lanthanum salt conversion film ; hot galvanized plate ; treatment time ; lead acetate resistance time ; salt spray test
- 分类号:
- TG174.4
- 文献标志码:
- A
- 摘要:
- 将热镀锌板浸入含有柠檬酸的处理液中制备镧盐转化膜,并研究处理时间对镧盐转化膜形貌、表面成分、物相及耐蚀性的影响。结果表明:镧盐转化膜含有 Zn 、 La 、 C 和 O 元素,主要由 ZnO 和 La 2 O 3 相组成。随着处理时间延长, La 元素质量分数呈增加趋势,伴随着 Zn 元素质量分数降低,镧盐转化膜的形貌先趋于致密而后表面龟裂出现脱落现象,导致耐蚀性先逐步提高而后下降。对热镀锌板化学转化处理 8 min 后,表面出现白锈的时间延长了约 30 h ,耐醋酸铅点滴时间延长了约 40 s ,膜层电阻和电荷转移电阻都提高约 2 倍,耐蚀性明显提高。
- Abstract:
- : Hot galvanized plate was immersed in a treatment solution containing citric acid to prepared lanthanum salt conversion films , and the effect of treatment time on the morphology , surface composition , phase and corrosion resistance of lanthanum salt conversion films was studied. The results showed that lanthanum salt conversion film contains Zn , La , C and O elements , and was composed of ZnO and La 2 O 3 phase. With the extension of treatment time , the mass fraction of La element shows an increasing trend along with the decrease of the mass fraction of Zn element , and the morphology of lanthanum salt conversion films tend to be dense at first and then the surface cracked and fell off , leading to the corrosion resistance increased at first and then decreased. When chemical conversion treatment of hot galvanized plate for 8 min , the time of white rust appeared on the surface was prolonged by about 30 h , the lead acetate resistance time was prolonged by about 40 s , and the film resistance and charge transfer resistance were increased by about two times , indicating that the corrosion resistance of hot galvanized plate was significantly improved.
参考文献/References:
[1] 周婉秋 , 刘艳荣 , 王建 , 等 . 热镀锌板钼酸盐转化膜制备及耐腐蚀性能研究 [J]. 沈阳师范大学学报 ( 自然科学版 ), 2013, 31(2): 148-152.
[2] 黄婷婷 , 周婉秋 , 王宇玲 , 等 . 添加剂用量对钼酸盐失效转化液再生的影响 [J]. 沈阳师范大学学报 ( 自然科学版 ), 2016, 34(1): 6-9.
[3] 赵艳 . 热浸镀锌层表面钛盐转化处理研究 [D]. 西安 : 西安建筑科技大学 , 2012.
[4] 吴晓晓 . 热浸 Galfan 镀层表面镧盐转化膜的研究 [D]. 广州 : 华南理工大学 , 2016.
[5] 甘树坤 , 刘爽 . 吕雪飞 . 金属表面耐蚀性稀土转化膜的研究进展 [J]. 吉林化工学院学报 , 2017, 34(9): 79-83.
[6] 吴海江 , 徐国荣 , 许剑光 , 等 . 热镀锌钢铈盐 / 硅烷复合膜的制备及其耐蚀性能 [J]. 材料保护 , 2013, 46(1): 16-18.
[7] 孔纲 , 吴双 , 林德鑫 , 等 . 热镀锌层柠檬酸改进型铈盐转化膜的生长机理 [J]. 中国有色金属学报 , 2012, 22(5): 1390-1397
[8] 吴海江 , 卢锦堂 . 热镀锌钢表面铈转化膜的表征与腐蚀电化学行为 [J]. 中国有色金属学报 , 2011, 21(5): 1009-1015.
[9] 史立平 , 郭瑞光 . 镀锌钢铈盐转化膜硅酸钠封闭后的耐蚀性能 [J]. 材料保护 , 2013, 46(6): 15-17.
[10] 田飘飘 , 张振海 , 徐丽萍 , 等 . 钴盐对热镀锌板有机硅烷转化膜耐腐蚀性能的影响 [J]. 材料保护 , 2013, 46(7): 13-15.
[11] 李丽洁 , 房永超 , 蔡召兵 , 等 . 镁合金无水化学转化膜表面裂纹行为的计算机模拟 [J]. 稀有金属材料与工程 , 2018, 47(2): 431-435.
相似文献/References:
[1]韩晶晶,窦国涛*.建筑用热镀锌板表面不同镧盐转化膜的制备与性能[J].电镀与精饰,2022,(2):1.[doi:doi: 10.3969/j.issn.1001-3849.2022.02.001]
HAN Jingjing,DOU Guotao *.Preparation and Properties of Different Lanthanum Salt Conversion Films on Hot Galvanized Plate for Construction[J].Plating & Finishing,2022,(7):1.[doi:doi: 10.3969/j.issn.1001-3849.2022.02.001]
备注/Memo
收稿日期: 2021-08-05 修回日期: 2021-11-06 作者简介: 陈天丽( 1984 -),硕士,讲师, Email : huajing0000@126.com 基金项目: 河南省科技攻关项目( 212102310972 )、河南省高等学校重点科研项目( 20B560016 )