
Electroplating surface finishing: gold plating, silver plating, nickel plating, anodizing, plus laser engraving and polishing.

Karl Sauer GmbH
57290 Neunkirchen (Altenseelbacher Weg 13)New on Amplifa
About Karl Sauer GmbH
Karl Sauer GmbH is a family business founded in 1953 by Karl Sauer in Neunkirchen-Altenseelbach, now run by the second generation and specializing in electroplating surface finishing. The range includes gold plating (up to 2 µm), silver plating (up to 20 µm), nickel plating (up to 15 µm), anodizing and passivation of aluminium as well as laser engraving and polishing. Production takes place both in rack processing and in barrel lines for small parts and bulk goods such as screws or stamped parts. Customers' product range extends from hospitality articles and fine tableware products to electrical conductors for the electrical industry. The quality management system is certified to DIN EN ISO 9001:2015. The offering is directed exclusively at business customers.
- Site
- Neunkirchen
- Processes
- Gold plating, Silver plating, Nickel plating, Anodizing, Passivation, Polishing, Laser engraving, Miniaturization (manufacturing and forming of metal products)
- Materials
- Aluminium, Metals (general, for electroplating), Plastic (laser engraving), Organic materials (laser engraving), Stamped parts (material not further specified), Gold plating, Silver plating, Nickel plating
- Certificates
- DIN EN ISO 9001:2015, ISO 9001
- Founded
- 1953
- Industries
- Electrical industry, Hospitality/tableware, Metal processing
- 01
Order clarification
- 02
Rack or barrel line
- 03
Gold plating / silver plating / nickel plating
- 04
Anodizing / passivation
- 05
Polishing
- 06
Laser engraving
- 07
Quality inspection
Materials & Processes
Gold plating
Electroplated gold coating up to 2 µm, as corrosion protection with good conductivity and low contact resistance; rack and barrel lines.
Silver plating
Silver coating up to 20 µm, electrically and thermally conductive, especially for the electrical industry.
Nickel plating
Nickel coating up to 15 µm, decorative protection against air, water and most acids and alkalis.
Anodizing
Conversion of the aluminium surface into an oxide layer; colors Natural, Black and Green, part size up to 800 mm / 50 kg.
Passivation
Making metal surfaces conductive, up to 800 mm / 50 kg.
Laser engraving
Permanent marking of metal, plastic and organic materials up to 100 × 100 mm.
Polishing
Treatment of metal surfaces for smoothing and finishing.
Locations

Neunkirchen
DEHeadquarters and production (electroplating surface finishing)
- Part weight / size
- up to 50 kg (anodizing)
- Materials
- Metals, aluminium, plastic (laser engraving)
- Barrel line for small parts and bulk goods
- Electroplating lines for rack processing
- Laser marking system (max. 100 × 100 mm)
Parts & Services




Inside the production




Industries
Processes & technical limits
| Processes | Tolerance | Max. part | Weight | Lot size | Materials |
|---|---|---|---|---|---|
| Gold platingSurface | – | – | – | – | Metals, Screws, Stamped parts, Small parts, Bulk goods, Rack parts |
| Silver platingSurface | max. coating thickness 20 µm | – | – | – | Metals, Screws, Small parts, Bulk goods, Rack parts |
| Nickel platingSurface | max. coating thickness 15 µm | – | – | – | Metals, Screws, Stamped parts, Small parts, Bulk goods, Rack parts |
| AnodizingSurface | – | 800 mm | 50 kg | – | Aluminium |
| PassivationSurface | – | 800 mm | 50 kg | – | Aluminium, Metals |
| PolishingSurface | – | – | – | – | Metal |
| Laser engravingSurface | – | 100 mm × 100 mm | – | – | Metal, Plastic, Organic materials |
| Miniaturization (manufacturing and forming of metal products)Forming | – | – | – | – | Metal |
| Manufacturing and forming of metal productsForming | – | – | – | – | Metal |
3 Anlagen & Maschinen
| Machine | Manufacturer / model | Quantity | Working area | Year built | Site |
|---|---|---|---|---|---|
| Barrel line (electroplating line for small parts/bulk goods) | – | 1 | – | – | Neunkirchen |
| Electroplating lines (rack processing) | – | – | – | – | Neunkirchen |
| Laser marking system | – | 1 | max. 100 mm x 100 mm | – | Neunkirchen |
Additional services
Quality
The quality management system meets the requirements of DIN EN ISO 9001:2015 (certificate no. 12816 QM, syszert GmbH) and takes account of corresponding customer requirements; uniform quality standards are defined for all processes.
| Evidence | Neunkirchen |
|---|---|
| ISO 9001 |
History
- 1953
Karl Sauer founds the company in Neunkirchen-Altenseelbach; initially gift articles and products for fine tableware, later focus on electroplating surface finishing.
Management taken over by the second generation; over 60 years of experience in the company.