摘要
通过脉冲电镀技术在Q235钢基体上制备出Zn-Ni-Mn合金镀层。研究了电流密度对镀层表面形貌、成分、沉积速率及耐蚀性的影响。结果表明,随着电流密度的增大,沉积速率先增大再减小;镀层中锰含量升高,锌、镍含量降低。随电流密度增加,该镀层随耐蚀性先增强后减弱。电流密度为3.0 A·dm^(-2)时,所得Zn-Ni-Mn合金镀层平整致密,耐蚀性最好。Zn-Ni-Mn合金镀层在3.5%NaCl溶液中的耐蚀性比在5.0%NaOH溶液中更好。
Zn-Ni-Mn alloy coatings were prepared on Q235 steel substrate by pulse electroplating. The effects of current density on the surface morphology, composition, electrodeposition rate and corrosion resistance of Zn-Ni-Mn alloy coating were studied. The results show that with current density increasing, the electrodeposition rate increases firstly and then decreases. Mn content in the alloy coating increases while zinc and Mn contents decrease. The corrosion resistance of the alloy coating increases firstly and then decreases with the increase of current density. The coating obtained at current density of 3.0 A·dm-2 is smooth and compact, and has the best corrosion resistance. The corrosion resistance of Zn-Ni-Mn alloy coating in 3.5% NaC1 solution is better than in 5.0% NaOH solution.
出处
《热加工工艺》
CSCD
北大核心
2017年第14期167-169,172,共4页
Hot Working Technology
基金
国家自然科学基金资助项目(51474088)
