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Gold Processes

Pure Gold Processes:

AURUNA 311

AURUNA 311 has been specifically developed for direct gilding of stainless steel.  The process is also well suited for chrome-nickel alloys, molybdenum steels and low activity nickel alloys.  Excellent as a strike solution, prior to heavy deposit gold plating.

The bath has a gold content 2-4g/l, according to application and a deposition rate up to 0.2 µm per minute.

AURUNA 550

A neutral electrolyte with high current efficiency producing matt yellow, pure gold deposits. The deposit has excellent bonding and soldering properties making it ideal for printed circuit and semiconductor applications.

AURUNA 551

A pure gold strike bath which is intended for depositing thin pure gold layers (0.05 – 0.1µm) prior to further gold plating in the likes of AURUNA 550.

This provides an adherent layer to substrates or intermediate layers but also protects the main gold electrolyte from contamination.

AURUNA 555

AURUNA 555 is a neutral pH, pure gold gilding solution with a gold content of 1-2 g/l.

This bath has a deposition rate of 0.1-0.15 µm per minute.

AURUNA 558

A high-speed pure gold bath for bonding applications, with good thermal stability.

Auruna 558 has a gold content of 12 g/l and a deposition speed of 0.6-2.4 µm per minute and meets MIL-G 45204 classification III A.

AURUNA 580

A weakly acidic gold strike bath for use in combination with Auruna 558.

AURUNA 5000

A weakly acid fine gold bath for rack and barrel applications. The high purity gold deposit has excellent bonding properties.

AURUNA Color

A range of colour gold baths with enhanced wear resistance by addition of hardener. The hardener renders the coatings more wear resistant without affecting the colour, which due to their composition are relatively soft.

Auruna Color hard gold baths are designed to produce thin coating of approximately 0.1-0.2 µm for decorative applications.

100 Yellow Green 0N
101 Pale Yellow 1N
102 Light Yellow 2N
103 Yellow    3N
104 Pink 4N
115 Red 5N
109 Pure Gold
146 Greyish Pink

Cobalt-Gold Processes:

AURUNA 539/539LC

AURUNA 539 and 539LC produce gold deposits of 99.7%, alloyed with cobalt. The ultra bright deposits have good corrosion and abrasion resistance with a hardness of 150-220HV.

The processes exhibit excellent deposit distribution.

AURUNA 529

A hard gold electrolyte with high current efficiency making it ideal for plating of electrical contacts or printed circuit boards.
This gold/cobalt alloy can also be used for decorative finishes.

AURUNA 5400

AURUNA 5400 produces a gold/cobalt alloyed deposits very similar to the AURUNA 539.

The variable gold concentration and wide operating current density range are characteristics of this process and it can be used in either rack or barrel applications.

AURUNA 8100

A high speed cobalt gold 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 220

AURUNA 220 produces a pale yellow, bright 14 carat nickel/iron/indium 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 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 8400

A new high speed hard nickel-gold 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 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 150-170HV.

AURUNA 5300

A nickel free gold/iron alloyed process for decorative and technical applications.

The coatings are solderable and have a high abrasion resistance when under friction load by a metallic contact.

Contacts coated with AURUNA 5300 exhibit a low contact resistance which is stable over a long period of time.

AURUNA 215

A weakly acid, decorative gold/iron/indium solution, producing a deposit of approximately       1-2N.

Nickel/Indium-Gold Processes:

AURUNA 221

A decorative gold plating electrolyte producing pale yellow deposits which are approximately 1N standard colour.

The process is easily controlled and can be used in either rack or barrel applications.

AURUNA 222

An easy to operate electrolyte which produces gold/nickel/indium alloyed decorative layers using either rack or barrel.

The light yellow coating produced is approximately 18ct or 2N standard colour with good corrosion and abrasion resistance.

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.

Immersion Gold Processes:

IMMERSION GOLD PP

An immersion gold process for producing thin 24 carat gold deposits on nickel and electroless nickel substrates.

This process is suitable for jig, barrel or basket applications.

Brush Plating Gold Processes:

AURUNA 250

A ready-for-use electrolyte for selective decorative pencil gold plating (brush gold plating). The metal is deposited by means of a wiping touch with a soaked brush. It works at room temperature, applied preferably for the direct plating of stainless steel.

AURUNA 261

A brush plating gold electrolyte producing a pale light yellow deposit of 1N.

AURUNA 262

A brush plating gold electrolyte producing a neutral yellow deposit of 2-3N.

AURUNA 263

A brush plating gold electrolyte producing a rich deep yellow fine gold colour.

AURUNA 264

A brush plating gold electrolyte producing a rose coloured deposit of 4-5N.

Gold Processes (Misc):

AURUNA FUNGICIDE 1

An effective non-foaming product for use in both gold plating baths and rinses.

K4 precipitation in weakly acidic gold baths

Nearly all divalent metal contamination can be removed by the addition of this product to weakly acidic gold baths. Precipitation is easy and prolongs the bath life.

Gold Potassium Cyanide

Gold Potassium Cyanide, 68% pure gold.

Supplied in 25 gram and 100 gram packs of gold metal.

Platinised Titanium Anodes

For use in gold and other noble metal solutions, platinised titanium anodes are available in 8 standard mesh sizes.

The anodes are made from 99.55% pure titanium, coated with 2.5 microns of platinum.

Both anodes and hooks are made to order to your required sizes.

Gold Brightener 408 WS

Gold Brightening Bath 408 WS is used for the anodic brightening of 8 - 18 carat coloured gold alloys and nickel-white gold alloys.

Anodic brightening dispenses with mechanical polishing to a varying degree depending on the shape, size and initial condition of the items.

Gold Stripping Processes:

Gold Stripper 645

A rapid non-electrolytic stripper for removing gold and alloy gold from a variety of substrates.  The solution does not generally attack the base material.

Temperature 25o-35 oC.
Stripping rate 0.5-1.0 µm per minute.
Capacity up to 20 g/l

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Contact Numbers:
Telephone +44(0)1386 552331
   
Address:

Schloetter Co Ltd
Abbey Works
New Road
Pershore
Worcestershire, UK
WR10 1BY