What is Geomet Plating?

GEOMET® is a zinc-aluminum flake coating embedded in a predominantly inorganic, chromium-free substrate, applied using various application techniques. This thin coating anti-corrosion system (geomet) can be combined with topcoats for fine tuning of the coating’s functional properties, frictional properties and corrosion resistance.

How many Geometric plating standards are there?

Geomet ® 720

GEOMET ® 720 is used to protect screws and many types of metal parts from corrosion and is used in many industries. It can be combined with PLUS® coatings to provide a wide range of coefficients of friction. This is the reference zinc flake coating in Asia.

• Dry, thin, non-electrolytic coating
• Water-based chemical coating
• Zinc and aluminum are passivated in the binder
• Has the appearance of silver metal

Features and performance

• The coefficient of friction can be adjusted to target values ​​between 0.06 and 0.20 (ISO 16047) with selected coatings of
  NOF METAL COATINGS GROUP
  • Salt spray test (ISO 9227)
  • 1000 hours stainless red
• No hydrogen subsidence
• Excellent assembly and multiple tightening capabilities (with lubricating coating)
• Performance maintained at high temperatures (up to 300°C)
• Coating
• Conductivity for most process applications
• Bimetallic compatibility with aluminum

Geomet ® 500

GEOMET ® 500 is applied to fasteners and a wide variety of metal parts for protection against corrosion, and it is used in many industries.

• Thin, non-electrolytic, self-lubricating dry film
  
• Water-based chemistry
  
• Free Chrome replacement for DACROMET ® 500
  
• Decorative silver metal
  

Features and performance

• Coefficient of friction: 0.15 ± 0.03 (ISO 16047)
  
  • Salt spray test (ISO 9227)
  • 240 hours without white rust
  • 720 hours stainless red
• No hydrogen subsidence
  
• Excellent assembly and multi-tightening behavior
  
• Good mechanical damage (test method D24 1312, USCAR 32)
  and chemical resistance (tested VDA 621-412)
  
• Performance maintained at high temperatures (up to 300°C)
  
• Coating
  
• Conductivity for most applications
  
• Bimetallic compatibility with aluminum
  

Geomet ® 321 most widely used in zinc flake technology.

Geomet ® 360 Used to protect brake discs against corrosion.

Process – production technology

GEOMET® coatings are manufactured by applying a liquid medium (also known as a liquid medium without the addition of media thickeners) to parts that have been pre-treated with a variety of other technologies. together and final cure at 300°C. To be able to apply a corrosion protection coating system to bulk materials, the parts must be loose and unbonded and weigh approximately 250 g/part, or alternatively, they must be able to pourable, non-interlocking with a weight of up to 200 g/part. To use rack technology, individual components must weigh up to 50 kg. Components with dimensions of 1,200 x 1,000 x 250 mm and a maximum weight of 25 kg are prerequisites for application using spray or rack technology.

Characteristics

• Typical coating weight 24 to 32 g/m2
• Meets global automotive industry specifications
• Resistance in salt spray test according to DIN EN ISO 9227 NSS over 1,000 hours possible
• cyclic corrosion test according to DIN 50017 KK / FKW / KTW: minimum 480 hours
• no risk of hydrogen deposition
• silver gray metal; combined with black top coating
• can be coated with commercially available coatings and cathode-embedded coatings
• resistant to diesel and gasoline, engine oils, organic solvents, coolants and brake fluids; combined with the “Plus” coating, improving resistance to acids and bases.