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Dörken MKS Electroplating: Corrosion protection system with the highest efficiency

Consistently high, uniform quality standards are required in many areas of industry. Electroplated surfaces are in use nearly everywhere and represent a reliable corrosion protection system. However: worldwide, this technology is offered by a wide range of companies, from small firms to the largest coating enterprises. And this is where the problem of fluctuating quality lies.

Fluid component coated with the DELTA-PROZINC® system

ELECTROPLATING – THE PRINCIPLE

Dörken MKS has taken up this challenge and responded with a system: the DELTA-PROZINC® electroplating protection system is a process-safe, highly-efficient electroplating system offering superb corrosion protection and fastening properties. System means that this is not just one product, but instead a system comprising individual products in an individually tailored, resource-saving process, with worldwide availability at selected licensees. This results in globally-uniform quality standards that are ideal for satisfying the high requirements of customers such as the car industry.

The overall package of pre-treatment products, zinc baths, passivation and top coats is also ecologically sustainable, as it dispenses with the need for nickel and cobalt. The top coats can be adjusted to the coefficients of friction requirements via integrated lubricant additives. They may be used to provide colour or to accommodate other requirements.

Pre-treatment

Zinc process

Passivation

Topcoat/Seal

 
  • Cleaner
  • Pickle
  • Electrolytic cleaner
 
 
  • Acidic, or
  • alkaline
 
 
  • Silvery, or
  • black
 
 
  • Colourless, or
  • black
 

INDIVIDUAL REQUIREMENTS, INDIVIDUAL SOLUTIONS

Each customer has a different focal point for requirements. Dörken MKS helps you to recognise these and reflect them in a perfectly-harmonised combination of plant and products.

At low coat thicknesses of 8-15 µm the nickel-free zinc system achieves corrosion protection of at least 360 hours against zinc corrosion (white rust) and 720 hours against base metal corrosion (red rust) in a neutral salt spray test as per DIN EN ISO 9227. In the event of damage to the surface the cathodic protection comes into play, as the zinc in the surface sacrifices itself.

The setting of defined fastening parameters via the topcoat is of particular interest for the automobile industry. The shiny, iridescent look enables use in both functional and decorative areas.

WE PRESENT A NUMBER OF SELECTED SYSTEMS HERE:

System name

System description

Corrosion resistance **

Example application

DELTA-PROZINC® 5011    

 
  • Alkaline zinc process
  • Thick coat passivation
  • Transparent topcoat
 
WR* 360 h
RR* 720 h

Fastening elements with coefficients of friction as per VDA

DELTA-PROZINC® 5015    

 
  • Alkaline zinc process
  • Thick coat passivation
  • Transparent top coat
 
WR* 360 h
RR* 720 h

Fastening elements with coefficients of friction as per specifications of the French market

DELTA-PROZINC® 7010    

 
  • Acidic zinc process
  • Thick coat passivation
  • Transparent top coat
 
WR* 360 h
RR* 720 h

Cast parts, such as brake callipers

*WR = White rust, RR = Red rust
** as per DIN EN ISO 9227 (de­pen­dent on coat struc­ture, geom­e­try, form of ap­pli­ca­tion)

THE CHARACTERISTICS OF OUR DELTA-PROZINC® ELECTROPLATING SYSTEM AT A GLANCE:

  • High cathodic corrosion protection through combination of our products, high white rust resistance
  • Thin, even coats
  • Adjustable coefficients of friction for threaded parts, as per customer specifications
  • Superb metallic appearance
  • Threaded parts without reworking / recutting
  • Ductility
  • Environmentally-friendly and resource-saving
  • Globally standardised product with uniform quality