YU Haiqing*,DING Chunyan.Application of Medium Temperature Zn-Ca Phosphating Process in Corrosion Protection of Q345 Steel[J].Plating & Finishing,2020,(5):44-46.[doi:10.3969/j.issn.1001-3849.2020.05.0070]
中温锌钙系磷化工艺在Q345钢防腐蚀中的应用
- Title:
- Application of Medium Temperature Zn-Ca Phosphating Process in Corrosion Protection of Q345 Steel
- 文献标志码:
- A
- 摘要:
- 选取Q345钢为基体进行中温锌钙系磷化处理,在磷化液温度分别为50、55、60、65和70 ℃的条件下制备了5种锌钙系磷化膜。采用浸泡实验和电化学腐蚀实验,对5种磷化膜的耐蚀性进行评价,并与Q345钢的耐蚀性进行了比较。结果表明,在中性氯化钠溶液中,相比Q345钢,磷化膜的腐蚀程度较轻,磷化膜的腐蚀电位发生正移,腐蚀电流密度降低;温度对磷化膜的耐蚀性有不同程度的影响,随着温度从50 ℃升高到70 ℃,磷化膜的腐蚀电位先正移后负移,腐蚀电流密度先降低后升高;当温度为65 ℃时制备的磷化膜具有相对优异的耐蚀性。
- Abstract:
- Five different types of Zn-Ca phosphating films were prepared on Q345 steel at the temperature of 50 ℃, 55 ℃, 60 ℃, 65 ℃ and 70 ℃, respectively. The immersion test and electrochemical corrosion test were carried out to evaluate the corrosion resistance of these phosphating films, and the corrosion resistance of these phosphating films was compared with that of Q345 steel. The results showed that in neutral sodium chloride solution, the corrosion degree of phosphating films was lighter than that of Q345 steel. Compared with Q345 steel, the corrosion potential of phosphating films was positively shifted and the corrosion current density was decreased. The corrosion resistance of phosphating films was affected by the temperature. As the temperature was increased from 50 ℃ to 70 ℃, the corrosion potential of phosphating films first shift-ed positive and then negative, while the corrosion current density first decreased and then increased. The phosphating films prepared at 65 ℃ exhibited relatively excellent corrosion resistance.
参考文献/References:
[1] 关永保. 钢铁基体防腐蚀施工前的表面处理[J]. 全面腐蚀控制, 2016(9): 90-91.
Guan Y B. Surface treatment of steel matrix before anti-corrosion construction[J]. Total Corrosion Control, 2016(9): 90-91 (in Chinese).
[2] 苗彦民, 李晓民. 锰系磷化在表面防锈工艺中的应用[J]. 现代涂料与涂装, 2017(7): 58-60.
Miao Y M, Li X M. Application of manganese-based phosphating in surface anti-rust process[J]. Modern Paint and Finishing, 2017(7): 58-60 (in Chinese).
[3] 王世娟, 胡瑾, 杨晓东. 常温清洁锌钙系磷化液的研制[J]. 实验室研究与探索, 2012, 31(5): 63-65.
Wang S J, Hu J, Yang X D. Manufacturer of cleaning Zn-Ca phosphating solution at room temperature[J]. Research and Exploration in Laboratory, 2012, 31(5): 63-65 (in Chinese).
[4] 黄琳, 刘法彬. 中温锌钙系磷化工艺[J]. 全面腐蚀控制, 2007, 21(2): 19-21.
Huang L, Liu F B. Study on calcium-zinc phosphating solution in middle temperature[J]. Total Corrosion Control, 2007, 21(2): 19-21 (in Chinese).
[5] 朱顺敏, 郑卫刚. Q345钢激光熔覆镍基WC合金组织与耐磨性研究[J]. 表面工程资讯, 2014(3): 8-9.
Zhu S M, Zheng W G. Microstructure and wear resistance of nickel-based WC alloy coated by laser cladding of Q345 steel[J]. Surface Engineering Information, 2014(3): 8-9 (in Chinese).
[6] 陈阳, 郝建军, 郭雪. 镁合金磷化工艺的研究[J]. 电镀与环保, 2015, 35(4): 49-51.
Chen Y, Hao J J, Guo X. Study on phosphating process of magnesium alloy[J]. Electroplating & Pollution Control, 2015, 35(4): 49-51 (in Chinese).
[7] 王桂香, 王洋洋, 吴舜. 镁锂合金表面锌锰磷化膜的制备与性能表征[J]. 稀有金属材料与工程, 2014, 43(7): 1764-1768.
Wang G X, Wang Y Y, Wu S. Preparation and characterization of Zn-Mn phosphate conversion coatings on Mg-Li alloy[J]. Rare Metal Materials and Engineering, 2014, 43(7): 1764-1768 (in Chinese).
备注/Memo
收稿日期: 2019-12-06;修回日期: 2020-03-10
通信作者: 于海青, email: yu_250000yt@sina.com
基金项目: 2017年山东省高等学校科研发展计划一般项目(J17KB008)