Overview
FrançaisABSTRACT
This article reviews the main properties of anti-corrosion paint films: the air drying paints (such as alkyd, vinylic and silicon paints) and oven drying paints. The specificity of the various air drying paints is that, contrarily to oven drying paints they do not require any energy intake in order to form the protective film. The oven drying paints, be they liquid or powder, are more easily preserved. Furthermore, they allow for the production of paint films with highly improved properties and the acceleration of the reticulation reactions which reduces the required storage space.
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Read the articleAUTHOR
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Jean-Claude LAOUT: Doctorate in Chemistry (3rd cycle)
INTRODUCTION
After defining the main paint constituents in the article
In air-drying paints, the chemical reactions that produce a film-forming layer on the metal substrate take place without any external energy input. In oven-drying paints, on the other hand, energy in the form of heat is essential to enable the cross-linking reactions to take place.
Oven paints have a special feature:
to be presented in a single pack, given their stability at room temperature;
produce paint films with improved mechanical properties (surface hardness, scratch resistance, etc.) compared to those obtained with air-drying paints;
reduce storage areas on production sites, given the speed with which paint film cross-links with metal substrates.
To better understand these differences, the main properties of these paints are summarized in the tables 1 to 5 .
Readers are reminded that a subsequent dossier,
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