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采用由30 g/L氧化锌、180 g/L氢氧化钠、2.8 g/L香草醛、4 g/L硫脲、4 g/L三乙烯四胺、1 mL/L甲醛和0.15 g/L SiC(粒径约40 nm)组成的碱性镀液对Q235钢脉冲电镀Zn-纳米Si C复合镀层,通过优化得到较佳的工艺条件为:平均电流密度2.0 A/dm2,占空比30%,镀液温度20～30°C,脉冲频率125 Hz,搅拌速率250 r/min,电镀时间20～25 min。在该工艺下所得复合镀层结晶细腻,含碳化硅的质量分数为1.67%,耐蚀性比脉冲电镀纯锌镀层更好。
Abstract：Zn–nano-SiC composite coating was prepared on the surface of Q235 steel by pulsed electroplating in an alkaline bath comprising ZnO 30 g/L, NaOH 180 g/L, vanillin 2.8 g/L, thiourea 4 g/L, triethylenetetramine 4 g/L, formaldehyde 1 mL/L, and SiC(about 40 nm in diameter averagely) 0.15 g/L. The process conditions were optimized as follows: average current density 2.0 A/dm2, duty cycle 30%, bath temperature 20-30 °C, pulse frequency 125 Hz, agitation rate 250 r/min, and electroplating time 20-25 min. The composite coating prepared is fine-grained, contains 1.67 wt.% of SiC, and has better corrosion resistance than the pure zinc coating prepared similarly by pulsed electroplating.
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基本信息:
DOI：10.19289/j.1004-227x.2021.09.003
中图分类号:TQ153
引用信息:
[1]陆雄波,邓型深,姜吉琼.碱性脉冲电镀Zn-纳米SiC复合镀层工艺条件的优化[J].电镀与涂饰,2021,40(09):674-677.DOI:10.19289/j.1004-227x.2021.09.003.
基金信息:
国家自然科学基金（51665010）
2021-05-15
2021-05-15