Shanghai Daoqin Plastics Co., Ltd.

in recent years day use product 不断 推陈出 new, for surface decoration more high requirements, more color electroplating trim parts very 受消费者欢迎, application non 常广泛, from 标牌, process product to 五金, tool, tool, 眼镜, table/sheet and other has application. plastics belongs to difficult material, although has formed process, 报道也 relatively more, for/regarding di color electroplating and more color electroplating process also to. for production relatively formed di color electroplating process brief introduction.
　　1· process process/workflow and precautions
　　 remove force → chemical remove 油→ chemical coarse 化→ salt acid 洗→胶体钯直接 active 化→ understanding 胶→ chemical 镀镍→毛刷刷洗→闪镀(焦磷 acid salt copper)→ acid property light copper → light 亮镀镍→ dilute acid active 化→镀仿金→钝化→烘 dry → local 点清漆→烘 dry →退 remove local 仿金层→ dilute H2SO4 active 化→镀铬→烘 dry →检验. above process process/workflow water 洗工序. water 洗一定 need has, need 清洗彻底. active and understanding rear water 洗严禁 use water 猛冲. 每道工序操 as need anti parts between scratch 伤碰毛. parts 装网, or from 网, in 倒出时 need light light as, most good in water 盆里, use water force anti parts between scratch 伤.
　　1.1 remove force will plastics parts in in, 70℃ lower temperature 2h.
　　1.2 chemical remove 油
　　 hydrogen oxidation 钠40g/L, acid 钠30g/L, carbon acid 钠20g/L, OP emulsification agent 1～3g/L, θ60～70℃, t10～15min
　　 remove process in, light light plastics parts, add fast remove speed degree. can will coarse rear recycling liquid add temperature to ultra- 70℃ lower remove 油.
　　1.3 chemical coarse 化[1]CrO3 400g/L, H2SO4(d=1.84)200mL/L, H2O 600mL/L versus for density 1.45θ70℃, t10～15min need according to formulation and as conditions as, 不会发生 coarse 化不足 or coarse degree.
　　1.4 salt acid 洗HCl(d=1.19)100～200mL/L, t1～3min salt acid can remove plastics surface coarse liquid and Cr3+. salt acid rear, can use 肉眼观察 to plastics surface 由淡淡 dark green 变 白一.
　　1.5胶体钯直接 active method PdCl2·2H2O 0.5～1g/L, SnCl2·2H2O 50～100g/L, HCl(d=1.19)200～300mL/L, θ 50～60℃, t5～10min chlorine concentrated degree need high, 否则配槽 cost high, belt/tape loss large. 一 资 material [2]报道 formulation in, chlorine quality concentrated degree low 于0.5g/L, in production in is can 行, make long active time to 30min above, temperature degree improve/increase to 60℃ above, 依然会出现露塑, production efficiency low, formed product rate low. is anti 止清洗 water belt/tape make active liquid dilute generate 沉淀, plastics parts 进入胶体钯直接 active liquid front, in 胶体钯 solvent liquid rear recycling liquid in 预浸5min, 不清洗直接进行胶体钯 active 化. prohibited will chemical 镀镍不 combined plastics parts 不退镍层直接进入胶体钯 solvent liquid active 化, make 胶体钯 active liquid 引入Ni2+, reduce active liquid active property and stability property.
　　1.6 understanding 胶NaOH 100～300g/Lt3～5min alkali liquid understanding method ratio acid liquid understanding speed degree fast, 彻底且无需 add hot, acid liquid understanding relatively concentrated acid need add hot.
　　1.7 chemical 镀镍, acid salt copper, acid property light copper, light 亮镀镍, 镀仿金 and solvent liquid formed separation, made, use and 常规镀 liquid same, can has material.
　　1.8毛刷刷洗 chemical 镀镍层 surface can can in solid pellets or its it material, electroplating rear easy generate coarse and 花脸, this in large 面积镀 parts upper very obvious, therefore increase 一道毛刷刷洗工序. 刷洗时不 need use hard 毛刷, 以免划伤 chemical 镀镍层.
　　1.9点清漆镀仿金 rear, 经钝化 again transparent can improve/increase resistant color can force, to insulation function, retardant 止仿金层 upper again upper 铬. plastics parts resistant temperature, requirements transparent is normal temperature dry type or low temperature dry type. local transparent 清漆时 need fine, anti in 需镀铬 花纹部位 upper 点漆. 如需烘 dry film, temperature degree need ultra- 70℃.
　　2·结束语
　　 more color electroplating market outlook/prospects good, 效益佳, 但起步晚无报道 can 参考. introduction di color electroplating product, color (仿金)背景衬托出白亮(铬)花纹图案, appearance very 漂亮. is, 亮镍层经 镀仿金, 钝化, dry, 点清漆, dry, local remove 仿金层 and other more 工序, 需24h above, 会发生严 heavy 钝化. tube/pipe dilute H2SO4 relatively long time active 化, 但镀铬 positive product rate also is low (can to 40% left right), made 约 经济效益. versus electroplating as 者 努 force, its it 如缎面镍+仿金, 黑镍+仿金, copper +黑镍, 白镍+黑镍+金 color, copper +黑镍+仿金…… more color electroplating process will more add formed 熟.