You are Here: Home > GMF Plating Processes > Gold Alloy Plating Processes
Gold Alloy Plating Processes
Cobalt-Gold Processes
AURUNA 539/539LC
AURUNA 539 and 539LC produce gold alloy deposits of 99.7% gold, alloyed with cobalt. The ultra bright deposits have good corrosion and abrasion resistance with a hardness of 150 - 220 HV.
The processes exhibit excellent deposit distribution.
AURUNA 7100
A high-speed cobalt alloyed gold plating process.
The deposit from this electrolyte contains 99.7% gold and has a hardness of 180 - 200 HV making it well suited for electrical contact applications.
AURUNA 8100
A high speed cobalt gold alloy process for reel to reel and tab plating applications.
Gold content is 12 g/l and deposition rate is up to 11 µm per minute.
Nickel-Gold Processes
AURUNA 215
A weakly acid, decorative nickel/gold plating solution, producing a deposit of approximately 1 - 2 N.
AURUNA 220
AURUNA 220 produces a pale yellow, bright 14 carat nickel-gold alloy deposit ideally suited for decorative applications.
With gold content 4 g/l and a deposition speed of 0.6 µm per minute the process is suitable for both rack and barrel applications.
AURUNA 523
A high efficiency nickel-gold alloy plating process containing 0.3% nickel.
The deposits show low and stable contact resistance and good wear resistance whilst showing a wide operating window.
It can be used in both rack and barrel and meets ASTM B488: type 2 - 3, code C.
AURUNA 527
AURUNA 527 produces a nickel gold alloy deposit and has been designed specifically for barrel plating.
This gold bath displays excellent metal distribution characteristics. The bath has a gold content of 2 - 5 g/l and a deposition rate of 0.02 - 0.1 µm per minute.
AURUNA 528
A weakly acid, hard gold plating electrolyte with high current efficiency.
This nickel alloyed gold plating solution is ideal for both printed circuit and decorative applications producing a yellow coloured deposit.
AURUNA 531
AURUNA 531 is a weakly acidic electrolyte for the deposition of bright, hard gold coatings – deep yellow in colour.
The nickel gold alloy coatings have a hardness of 140 - 150 HV and display good abrasion resistance.
AURUNA 535/535LC
AURUNA 535 is a weakly acidic electrolyte producing deposits containing 99.8% gold. The gold is alloyed with nickel and the resulting deposit has a hardness of 140 - 150HV.
Both the 535 bath and the 535LC bath (low concentration) may use stainless steel anodes.
AURUNA 7400
AURUNA 7400 is a high-speed nickel gold bath. The yellow gold deposits have a purity of 99.5 - 99.9% gold and a hardness of 120 - 180HV.
AURUNA 8400
A new high speed hard nickel-gold alloy process designed for electrical contacts.
Low porosity and wear resistance are features together with an extended operating range.
ASTM B-488: type2-3, code C.
Nickel/Cobalt-Gold Processes
AURUNA 247
A weakly acid, nickel/cobalt alloyed gold plating electrolyte specifically designed for the bathroom industry. The yellow-grey coloured deposit has good corrosion and abrasion resistance as well as good hardness.
Iron-Gold Processes
AURUNA 536/536LC
A decorative, deep-yellow iron/gold alloy deposit is produced by AURUNA 536 which is suitable both decorative and technical applications (MIL-G 45204 classification I-11C).
The solution has a gold content of 11 g/l and has a deposition speed of 1 µm per minute.
These electrolytes produce a gold deposit of 99.7% gold alloyed with iron. Crack-free coatings of up to 10 µm can be achieved with a hardness of 150 - 170 HV.
AURUNA 7000
A high-speed acid gold plating solution, producing iron alloyed gold deposits. Ideally suited to connector applications, this electrolyte can be easily cleaned of metallic impurities.
Nickel/Indium-Gold Processes
AURUNA 221
A weakly acid, nickel/indium alloyed gold plating electrolyte producing a pale yellow 1N coloured deposit.
Deposits have good corrosion and abrasion resistance making them ideal for decorative applications.
AURUNA 222
Similar to AURUNA 221 but producing a light 2N colour.
AURUNA 223
Similar to AURUNA 221 but producing a pale yellow/greyish colour.
AURUNA 230
A high speed, nickel-indium alloyed gold plating electrolyte producing a pale yellow colour.
AURUNA 232
As AURUNA 230 but producing a light yellow 2N colour.
AURUNA 233
As AURUNA 230 but producing a pale/greyish colour.
Silver-Gold Processes
AURUNA 570
A range of alkaline-cyanide, silver alloyed gold electrolytes producing thick coatings of gold.
| AURUNA 570 | 18 carat | Green Yellow |
| AURUNA 571 | 20 carat | Light Yellow |
| AURUNA 572 | 22.8 carat | Deep Yellow |
| AURUNA 574 | 14 carat | Pale Yellow |
| AURUNA 575 | 12 carat | Yellowish White |