电镀Zn-Ni-P合金及其耐蚀性研究
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摘要
通过Hull槽实验对乙酸盐体系电镀Zn-Ni合金工艺进行了优化,再向优化后的镀液添加Na_2H_2PO_2,制备出Zn-Ni-P合金。对不同P含量的Zn-Ni-P合金镀层的耐蚀性进行了研究,并表征其微观形貌和镀层组成。结果表明,乙酸盐电镀Zn-Ni-P合金的最佳配方及工艺条件为:ZnCl_2100 g/L,NiCl_2?6H_2O 120 g/L,CH_3COONH_480 g/L,CH_3COONa 40 g/L,KCl 200 g/L,Na_2H_2PO_215 g/L,SDS 0.06 g/L,pH为4,电流密度为1.5 A/dm~2,温度为40℃。该工艺下制备的镀层结晶细致,P含量约为12.5%,耐蚀性最好。
The process of electroplating Zn-Ni alloy in acetate system was optimized by Hull cell test,and Na_2H_2PO_2was added to the optimized plating solution to prepare the Zn-Ni-P alloy.The corrosion resistance of Zn-Ni-P alloy with different P contents was studied,and the microscopic morphology and composition of the alloy were analyzed.The results showed that the optimum technological parameters of preparing Zn-Ni-P alloy were obtained as follows:ZnCl_2100 g/L,NiCl_2·6H_2O 120 g/L,CH_3COONH_480g/L,CH_3COONa 40 g/L,KCl 200 g/L,Na_2H_2PO_215 g/L,SDS 0.06 g/L,pH was 4,current density was 1.5 A/dm~2,temperature was 40℃.The coating prepared using the optimum method had a fine suface,and the better corrosion resistance.The P content of the alloy was about 12.5%。
The process of electroplating Zn-Ni alloy in acetate system was optimized by Hull cell test,and Na_2H_2PO_2was added to the optimized plating solution to prepare the Zn-Ni-P alloy.The corrosion resistance of Zn-Ni-P alloy with different P contents was studied,and the microscopic morphology and composition of the alloy were analyzed.The results showed that the optimum technological parameters of preparing Zn-Ni-P alloy were obtained as follows:ZnCl_2100 g/L,NiCl_2·6H_2O 120 g/L,CH_3COONH_480g/L,CH_3COONa 40 g/L,KCl 200 g/L,Na_2H_2PO_215 g/L,SDS 0.06 g/L,pH was 4,current density was 1.5 A/dm~2,temperature was 40℃.The coating prepared using the optimum method had a fine suface,and the better corrosion resistance.The P content of the alloy was about 12.5%。
引文
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[3] Feng Z,Li D,Sun Q,et al. Insight into the role andmechanism of 2,2-bipyridine as a novel additive for na-no-electrodeposition of Zn-Ni alloy[J]. Journal of Alloysand Compounds,2018,8(15):1026-1034.
[4] Kubisztal J,Niedbala J,Budniok A. Corrosion resis-tance of Zn-Ni-P+Ni composite coatings[J]. Surface andInterface Analysis,2010,42(6-7):1222-1225.
[5] Pouladi S,Shariat M H,Bahrololoom M E. Electrodepo-sition and characterization of Ni-Zn-P and Ni-Zn-P/nanoSiC coatings[J]. Surface&Coatings Technology,2012,213:33-40.
[6] Srivastava C,Ghosh S K,Rajak S,et al. Effect of pH onanomalous co-deposition and current efficiency duringelectrodeposition of Ni-Zn-P alloys[J]. Surface&Coat-ings Technology,2017,313:8-16.
[7] Popescu,Maria A,Moreno,et al. Synthesis,morpholo-gy and specific magnetization of the electrodeposited ZnNi-P thin films on copper substrate from non-cyanideelectrolyte[J]. Central European Journal of Chemistry,2013,11(7):1137-1149.
[8]谢勤. Zn-Ni、Zn-Ni-P合金电镀工艺及其基础理论研究[D].长沙:中南大学,2001.
[9]谭育慧,王艳,章朦,等.电解铜箔表面电沉积Zn-NiP-La合金工艺[J].应用化学,2015,32(4):458-463.
[10]黄清安,邓伯华.铜电极上Zn-Ni-P合金电沉积行为的研究[J].电镀与涂饰,1996,3:1-3.
[11]肖友军,李立清,秦灏.影响Zn-Ni-P合金镀层中Ni和P含量的因素[J].材料保护,2008,41(9):28-30.
[12]项腾飞,焦亚萍,梅天庆,等.纳米SiO2对锌-镍合金镀层耐蚀性的影响[J].电镀与精饰,2015,37(2):28-32.
[13]Nasri F,Zouari M,Kharrat M,et al. Structural,micro-mechanical and tribological characterization of Zn-Nicoatings:effect of sulfate bath composition[J]. Transac-tions of the Indian Institute of Metals,2018,3:1-14.