摘要
以镀液稳定性,纳米TiO_2在镀液中的分散性,沉积速率,镀层的磷含量、TiO_2颗粒含量、显微硬度、孔隙率和耐蚀性为指标,研究了硫酸高铈对复合化学镀Ni–P–TiO_2的影响。镀液最优组成和工艺条件为:NaH_2PO_2·H_2O 32g/L,NiSO_4·6H_2O 26g/L,一水合柠檬酸20g/L,CH_3COONa·3H_2O 15g/L,十二烷基苯磺酸钠40mg/L,纳米TiO_2 1.5g/L,硫酸高铈4~24mg/L,温度(88±1)°C,pH4.8±0.2,时间1h。结果表明,适量硫酸高铈的加入能够提高镀液稳定性,加快沉积速率,提高Ni–P–TiO_2复合镀层的磷含量、显微硬度以及耐蚀性。
The effect Of ceric sulfate on electroless Ni-P-TiO2 composite plating was studied using stability of bath, distribution of nano-TiO2 in bath, deposition rate, as well as phosphate content, TiO2 content, microhardness, porosity and corrosion resistance of the composite coating as the evaluation indicators. The optimal bath composition and process conditions are as follows： NaH2PO2·H2O 32 g/L, NiSO4·6H2O 26 g/L, citric acid monohydrate 20 g/L, CH3COONa·3H2O 15 g/L, sodium dodecyl benzenesulfonate 40 mg/L, nano-TiO2 1.5 g/L, temperature 88±1 ℃, pH 4.8±0.2, and time 1 h. After adding a suitable amount of ceric sulfate to the bath, its stability is improved and the deposition rate, phosphorus content, microhardness and corrosion resistance of the Ni-P-TiO2 composite coating are increased.
出处
《电镀与涂饰》
CAS
CSCD
北大核心
2017年第5期235-238,共4页
Electroplating & Finishing
基金
2017年贵州大学研究生创新基金(研理工2017003)
铝合金化学镀镍低铬钝化综合研究(黔科合区域合[2014]7007)
关键词
镍–磷合金
纳米二氧化钛
复合化学镀
硫酸高铈
稳定性
耐蚀性
nickel-phosphorus alloy
nano-titania
electroless composite plating
ceric sulfate
stability
corrosion resistance
