Scientific Engineering of Anti-Corrosion Coating Systems based on Organic Metals (Polyaniline)

Dr. Bernhard Wessling
Ormecon Chemie GmbH & Co. KG, Ammersbek
(a subsidiary of Zipperling Kessler & Co.)

The new corrosion protection technology with polyaniline, an Organic Metal (conductive polymer), is presented. It is based on an immense surface ennobling and the formation of a passivating metal oxide. The requirements for efficiently working coating systems, comprising the dispersed Organic Metal containig primer, eventually an intercoat, and a top coat, are characterized. An integrated 4-step-method („scientific engineering“) has been developed and is successfully used for the systematic development of such coating systems. The combination of the measurement of the open circuit potential, a new scratch test, EIS and SKP together are a powerful tool for predicting the results of accelerated corrosion tests and real-time corrosion prevention performance. Organic Metal coating systems are out-performing even the best conventional anti-corrosion coating systems.

1. Early work

2. Breakthrough

3. The need for a systematic, scientific development tool

4. "Scientific Engineering": a new research and development tool for anti-corrosion coatings
   

   • 4.1 Open Circuit Potential Measurement
   • 4.2 Ormecon Scratch Test
   • 4.3 Scanning Volta Potential Measurements (Kelvin Probe)
   • 4.4 Electrochemical Impedance Spectroscopy
   • 4.5 Climate cycling test (VDA) / Salt Spray Test

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