Common plating technology introduction

1 bright copper cyanide alkaline
In the previous step to complete the pre-copper alloy plated with thick, coating thickness up to 10μm above, Brightness as acidic bright copper plating, blackening treatment if carried out up to the dark effect, has been in 10,000 liters tank running for two years.
2 shiny silver cyanide
Ordinary type with thiosulfate based complexing agent, senior type to sulfur-based organic complexing agent. Full bright coating thickness up to 40μm above, the coating surface resistivity ~ 41μΩ · cm, hardness ~ HV101.4, thermal shock 250 ℃ qualified, very close to the performance of silver cyanide.
3 autocatalytic electroless gold cyanide
Molybdenum tube salt used Na3 [Au (SO3) 2], the gold layer thickness of up to 1.5μm, has been used in high-density flexible circuit boards and electronic ceramic plating.
4 Non-formaldehyde autocatalytic electroless copper
For through-hole plated circuit board and a non-conductive surface metallization. Get rid of toxic formaldehyde replaced by cheap non-toxic hypophosphite, no commercial products at home and abroad. Laboratory research has been basically completed, the deposition rate 3 ~ 4μm / h, the life of 10 cycles (MTO) above, dense coating, bright. But should be further improved and ongoing pilot test.
5 pure palladium plating
Ni can cause dermatitis, the EU has already refused to import Ni-containing jewelry, palladium is the best generation of Ni metal. The project was completed in 1997, including two kinds of technology, one thin palladium plating thickness 0.1 ~ 0.2μm, has been used as a preservative in White Bronze decorative coatings and anti-silver color layer; Second thick palladium plating thickness 3μm no cracks (current international standards), because palladium is expensive, has yet to enter the domestic market.
6 trivalent chromium passivation of zinc plated blue and white and color agents
Trivalent chromium salt instead of carcinogenic hexavalent chromium salts. Color, such as blue and chrome passivation layer, through the neutral salt spray test 26 hours or more, has experienced a decade of market tests. Color passivation laboratory studies have been completed, bright color, but are subject to a pilot test.
7 gold plating
Main salt K [Au (CN) 2], is a micro-cyanide process. 99.99% pure gold plating, gold (30μm) bonding strength> 5g, Ball (25μm) shear strength> 1.2Kg. Knoop hardness H <90, has been used in high-density flexible circuit board gold.
8 white steel plating
A Pd (60) Ni (40) and Pd (80) Ni (20) are two, has been used in electronic products, and anti-silver plating voucher color layers.
9 Other technical
Precious metals gold, silver, palladium recovery technology; diamond-plated inlay technology; stainless steel precision electrochemical and chemical polishing techniques; textiles copper, nickel technology; hard gold (Au-Co, Au-Ni) plating; palladium-cobalt alloy plating; gun Black Sn-Ni plating; chemical plating; gold dip; immersion silver; Immersion Tin