EC Conference | High-End Anti-Corrosion Coatings

Environmental product declarations (EPDs) are widely used to quantify the environmental impact of a particular product. However, coatings are commonly used in a multi-product system. EPDs for a single product in the system may not adequately quantify the environmental impact of the full system in the context that it is being used. Using a paint system approach, calculated by area, gives improved insight to the applied system, and makes it easier to use in the paint industry, compared to individual product declarations based on weight of products. To fill this gap, AMPP (Association for Materials Protection and Performance) is developing a sustainability scorecard standard that can be used to evaluate the environmental impact of a coating system. Elements under consideration for the scorecard include embodied CO2e, embodied water, CO2e downstream, paint consumption, durability, product hazard, chemical safety, and VOC content. This presentation will review the concept of the scorecard, provide updates on the status of the standard under development, and show how industry representatives can get involved in the standards development process.

Among the environmentally friendly direct-to-metal (DTM) WB coatings, 1K acrylate technology has been widely popular for its ease of usage. But for ultimate high performance that combines excellent corrosion resistance coupled with good chemical resistance and glossy appearance, often multicoat systems are used i.e. corrosion resistant primer with 2K WB Polyurethane topcoats. It had been long wish of industry to have single coating system that has optimal properties in all these directions to reduce number of layers and complexity of coating process. In this work we developed a hydroxyl functional acrylate dispersion for 2K WB polyurethane system that provides good metal protection properties combined with required topcoat performance such as chemical resistance and glossy appearance. The strategic design of the dispersion enabled us to achieve excellent metal protection properties at high gloss levels.

Online low-frequency impedance monitoring of coatings exposed to the atmosphere produces impedance modulus patterns that can be associated with the reversible influence of humidity/temperature fluctuations in the short term and the irreversible changes imparted by weathering in the long term. A new and intact coating system provides a dielectric barrier that effectively isolates the metal substrate from the environment. The baseline impedance can be calculated from the thickness and approximate relative dielectric constant and/or measured on the coating when dry. The loss of impedance from the baseline value and the recovery of the baseline value is observed when the coating is exposed to different humidity/temperature regimes, artificial or natural weathering. It will be presented that the intensity of the reversible impedance variations during weathering as well as the irreversible impedance loss resulting from accelerated exposure can be related to the responsiveness of the dry coating to the temperature rise, the isothermal response of the coating to moisture, the accelerated electroosmotic water uptake and the visual appearance of the coating after accelerated exposure.

During the meet-the-speakers time, you have the opportunity to meet with selected speakers in personal one-on-one meetings. Here you can get personal answers to your questions or individual solutions to your problems.

Corrosion driven delamination of organic coatings is usually considered to occur either as cathodic delamination or anodic delamination. Cathodic delamination is the faster of these two and hence is considered the more dangerous one. Although a significant progress towards the fundamentals of delamination was achieved in the recent decades, the underlying key parameters are not fully understood. Here the most recent insights into the fundamental mechanisms will be presented and the consequences for application will be discussed.

A proven concept for cleaning and pre-treatment of surfaces will be presented. Flash rust inhibitors, which have a positive influence on the long-term protection of paints in addition to favourable labelling. The likewise liquid long-term inhibitors, which are able to completely or partially substitute corrosion protection pigments. Adhesion-promoting silanes can also be replaced in paints without the risk of loss of effectiveness through hydrolysis.