Eckart Functional Effect Pigments – Zinc Flake based anti Corrosion Paints with reduced Heavy Metal Content

Time: 4:00 pm - 4:20 pm

Date: 17/11/2021

17-11-2021 16:00 17-11-2021 16:20 Europe/London Eckart Functional Effect Pigments – Zinc Flake based anti Corrosion Paints with reduced Heavy Metal Content

The use of Zinc flakes as active ingredient in corrosion protection coatings is established since the 70th. Motivation at this time was to maximize the anti-corrosion performance of coatings at very thin film thicknesses. First target applications were screws, clips and chassis components for the automotive industry. The morphology of Zinc flake pigments allows to… Read more »

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Synopsis

The use of Zinc flakes as active ingredient in corrosion protection coatings is established since the 70th. Motivation at this time was to maximize the anti-corrosion performance of coatings at very thin film thicknesses. First target applications were screws, clips and chassis components for the automotive industry. The morphology of Zinc flake pigments allows to combine two functionalities: Zinc flakes act as barrier, additionally these pigments provide galvanic protection, thus leading to superior anticorrosion performances. Zinc flakes can also be used in other applications, such as heavy corrosion protection. The pigments are used in heavy duty corrosion protection since the 1990s and the applications containing Zinc flakes can easily be designed to meet the requirements of DIN EN ISO 12944-6 C5 very high according test program 2. Due to the platelet structure, the zinc particles overlap or touch each other in the dry coating film, thus forming percolation paths. A galvanic effect is achieved already at a PVC of 12 %, what allows a huge reduction of the active metal content in the formulation in comparison to traditional Zinc dust systems. The use of Zinc flakes enables a valuable contribution to conserving resources for the scarce raw material zinc. Overall the lower material consumption of metallic zinc which is enabled by the use of Zinc flakes can trigger a valuable contribution in terms of cost-effectiveness and sustainability.

Speakers

  • Peter Wissling Global Head of Functional Coatings Marketing & Technical Services - Delta Tecnic

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