摘要
采用中温锌-锰系磷化工艺,按照三因素四水平正交试验方案,在40Cr钢表面制备了16种锌-锰系磷化膜。通过硫酸铜点滴实验,测试了磷化膜的耐腐蚀性能,进行了最优工艺参数的筛选。分析了最优工艺条件下制备的磷化膜的元素组成,并观察了最优磷化膜和40Cr钢浸泡腐蚀前后的形貌。结果表明,正交试验极差分析得到各因素对磷化膜耐硫酸铜点滴时间影响的主次顺序为:磷化液温度>磷化时间>表调时间。当表调时间为30 s、磷化时间为25 min、磷化液温度为65℃时,磷化膜的耐硫酸铜点滴时间最长,耐腐蚀性能最好。最优磷化膜主要由Zn、P、Mn、Fe和O元素组成,Zn元素含量最高,约为38%;最优磷化膜浸泡腐蚀前后的形貌变化不大,能有效减轻40Cr钢的腐蚀程度。
Sixteen kinds of zinc-manganese phosphating films were prepared on the surface of 40Cr steel by medium temperature zinc-manganese phosphating process according to three-factor and four-level orthogonal experimental scheme.The corrosion resistance of phosphating film was tested by copper sulfate dropping test,and the optimum process parameters were selected.The element composition of the phosphating film prepared under the optimum conditions was analyzed,and the morphology of the phosphating film and 40Cr steel before and after immersion corrosion was observed.The results showed that the order of the influence of the factors on the corrosion-resistance time of copper sulfate dropping test was as follows:phosphating solution temperature>phosphating time>surface conditioning time.When surface conditioning time was 30 s,the phosphating time was 25 min and the phosphating solution temperature was 65℃,the phosphating films showed the longest corrosion-resistance time to copper sulfate dropping test,and exhibited the best corrosion resistance.The optimal phosphating film was mainly composed of Zn,P,Mn,Fe and O elements,and the content of Zn was the highest,about 38%.The morphology of the optimal phosphating film had little change before and after immersion corrosion,which can effectively reduce the corrosion degree of 40Cr steel.
作者
许兵
司晓卉
张立祥
XU Bing;SI Xiaohui;ZHANG Lixiang(Shanxi Institute of Mechanical and Electrical Engineering,Changzhi 046000,China;Tangshan No.1 Vocational Secondary School,Tangshan 063000,China;North China University of Science and Technology,Tangshan 063000,China)
出处
《电镀与精饰》
CAS
北大核心
2020年第6期13-17,共5页
Plating & Finishing
基金
河北省职业教育科学研究“十三五”规划重点课题(JZY19006)。
关键词
锌-锰系磷化膜
耐腐蚀性能
表调时间
磷化液温度
磷化时间
zinc-manganese phosphating film
corrosion resistance
surface conditioning time
phos⁃phating solution temperature
phosphating time
作者简介
通信作者:许兵,email:tangshan_063000@126.com。
