Coatings such as plated chrome normally has a fine network of surface cracks due to internal stresses. The corrosion of the chrome plating normally occurs due to the corroding agent entering these cracks and subsequently corrosion proceeds between the chrome layer and underlying the steel, resulting is discrete red rust spots, an orange surface hue and lifting off of the chrome.

High density, highly cross-linked polymers combined with organic penetrating agents can be used to seal the network of cracks, the most common product being “MLP”. These polymers are melted into the surface of the chrome, it penetrates into the cracks and effectively seals the surface against ingress of corrosion. The salt spray resistance of the chrome can thus increase up to an exceptional 1000 hrs. MLP lowers the friction coefficient as shown below.

Application is not only limited to chrome plating, it can be applied to surface treatments such as thermal spray, electroless nickel and nitriding in applications ranging from injection moulding (especially for the corrosive PVC), hydraulics, pneumatics, and screw rods to impart lubricity and to improve release.

 

Base Friction Co-eff (Static)
Steel on Steel 0.6
MLP on Steel 0.18
Chrome on Steel 0.16
MLP treated Chrome on Steel 0.04

 

Additional benefits are:

  • Will not alter part dimensions
  • Heat resistant to over 600 °C
  • Resistant to solvents
  • FDA food and medical safe

 

For more information, please contact us.