1. No cyanogen alkaline bright copper

Step to complete the precoated with thickening on the copper alloy, coating thickness can reach more than 10 microns, brightness, such as acid bright copper plating, if black processing of dark effect, has been in the normal operation of 10000 litres of slot for two years.

2. No cyanide bright silver plating

Normal is given priority to with thiosulfate complexing agent, senior type is given priority to with sulfur-free organic complexing agent. QuanGuangLiang coating thickness can reach more than 40 microns, coating the surface resistance ~ 41 mu Ω ㎝, ~ HV101.4 hardness, thermal shock, 250 ℃ unqualified, very close to the performance of cyanide silver plating.

3. No cyanogen autocatalytic chemical plating

Main salt use Na3 [Au (SO3) 2], the gold layer thickness can be up to 1.5 mu m, has been used in gold plating on the high-density flexible circuit boards and electronic ceramics.

4. The formaldehyde autocatalytic chemical copper plating

Used for PCB through-hole plating and nonconductive surface metallization. Abolish with cheap non-toxic hypophosphite toxic formaldehyde generation, there is no commercial product at home and abroad. Basic laboratory research completed, deposition rate 3 ~ 4 mu m/h, lifetime of more than 10 cycle (MTO), compact, bright coating. But needs further perfect and pilot test.

5. Pure palladium plating

Ni can cause dermatitis, the eu has refused to containing Ni accessories imports, Ni metal palladium is the best generation. This project completed in 1997, including two kinds of process, it is a thin palladium plating, the thickness of 0.1 ~ 0.2 mu m, has been used as anticorrosive decorative plating on cupronickel tin and the silver color layer; Two is thick palladium plating, 3 microns thick, no crack (international level) at present, because of palladium is expensive, not yet entered the domestic market.

6. Zinc trivalent chromium plating blue white and colored passivator

Chromic salt substitute carcinogenic hexavalent chromium salt. Blue and white passivation colour such as chrome plated layer, through salt spray test more than 26 hours, has experienced 10 years of market test. Colour passivation has completed laboratory research, bright color, but must be pilot test.

7. Pure gold plating

The main salt for K [Au (CN) 2], is a micro cyanide process. Plating gold purity 99.99%, gold (30 microns) bonding strength > 5 g, solder ball shear strength (25 microns) > 1.2 Kg. Knoop hardness H < 90, has been used in high-density flexible PCB plating.

8. Bai Gang electroplating

With Pd (60) Ni (40) and Pd (80) Ni (20), has set up a file in the electronic products used in kims plating layer and the silver color.

9. Other technologies

Gold, silver, palladium recovery of precious metals; Diamond set plating technology; Stainless steel chemical and electrochemical precision polishing technology; Textile copper plating, nickel plating technology; Hard gold (Au - Co, Au - Ni) plating; Palladium cobalt alloy electroplating; Gun black Sn - Ni electroplating; Chemical plating; Pure gold immersion plating; Chemical heavy silver; Chemical tin.