Dear Readers,

Weiboold Academy LogoThis is the eighth article from our monthly blog series “Weibold! Academy”.

As we have mentioned before, with these articles we try to provide our readers and our newsletter subscribers with valuable knowledge about the tire recycling industry.

We believe that a good knowledge foundation might be beneficial for everyone involved in the industry and each month we cover different topics, thus providing you with important know-how for the tire recycling industry. Month by month we together dwell deeper into the world of tires and the ways of recycling them.

In case you have missed our first seven W! Academy articles, you can find them here:

  1. Welcome to Weibold! Academy
  2. Weibold! Academy: Recycled Rubber Output Spectrum and Rubber Granulates
  3. Weibold! Academy: Rubber Granulates, Rubber Powder, Tire Derived Steel and Tire Derived Fiber
  4. Weibold! Academy: Tyre Recycling Value Chain
  5. Weibold! Academy: Applications for Tyre Recycling Plant Output
  6. Weibold! Academy: Rubber Granulate Applications
  7. Weibold! Academy: Rubber Powder Applications – Rubber Industry

This month we continue covering the recycled rubber output spectrum and will explain more about surface coatings.

Rubber Powder Applications

Surface Coatings

Conventionally, there are two types of surface coating; liquid and powder surface coating. Recent advancement in surface coating industry have introduced the use of synthetic polymers that include paints, drying oils and varnishes, synthetic clear coatings, and other products whose primary function is to protect the surface of an object from the environment. Moreover, the addition of rubber additive has been proven to provide additional strength and durability to the surface coating material.

The coating material consists of fine rubber powder and, e.g., polyurethanes serving as binder. Both components are blended in a two-component high pressure syringe and are sprayed on the surface to be coated. This material usually is solvent-free and thus environmentally friendly. This method ensures a very good adhesion on almost all surfaces such as steel, concrete, wood, pressboard plates, fibre glass, armoured plastic and roof coatings. Coatings can be applied manually or by means of industrial sprays.

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These rubber powder based coatings are especially suitable as:

  • Corrosion protection
  • Protection against mechanical attrition
  • Protection against fouling
  • Noise and vibration damping
  • Diffusion protection
  • Shock absorption

Durability, elasticity and reduction of mechanical impacts are ensured also during low or high ambient temperatures.

Work carried out by Nasser Al-Aqeeli at King Fahd University of Petroleum and Minerals in Saudi Arabia concludes that as the content of rubber powder increases, the bulk hardness of the coating decreases but the corrosion resistance increases. The result of the study suggest that the ductility of the coating plays a major role in the erosion resistance of the fabricated coating. The corrosion studies showed an improvement in the corrosion resistance of the substrate due to the application of rubber powder based coatings.