Video: Anti-rust Pigments Are Intended To Prevent Metal Corrosion
2023 Author: Hannah Pearcy | [email protected]. Last modified: 2023-11-26 11:39
The term corrosion stands for the chemical reaction of metallic materials with substances in their environment. The use of coatings that contain rust protection pigments is intended to prevent or delay metal corrosion. As a rule, the formation of rust affects the function of the material. Each component also corrodes differently under the prevailing conditions.
The aim should therefore be to prevent corrosion reactions and their consequences as far as possible. Base, intermediate and top coats with rust protection pigments can be coordinated so that highly effective (heavy) corrosion protection is achieved.
Lead-containing pigments are often used as a base coating on structural steel. B. Red lead (DIN 55916). On the binder base alkyd resin red lead has a passivating effect on
the steel surface. The effect of lamellar lead soaps improves the mechanical strength, water resistance and the adhesion of this protective layer.
Metallic pigments contained in zinc dust primers protect steel components in the cathodic area. The base metal zinc is deliberately connected to the component to be protected in order to shift the corrosive reaction. The resulting oxidation products additionally seal the coating and make further corrosion more difficult. These primers contain a high proportion of zinc dust pigments (DIN EN ISO 3549)
and are mostly processed in conjunction with epoxy resin and alkali silicates. Intermediate coatings in particular provide a barrier effect within the coating system. Pigments, such as iron mica or platelet-shaped iron oxide pigments, have a purely physical effect. The diffusion path for corrosive substances is significantly extended by the formation of lamellar structures in intermediate or top coatings.
INM researchers have developed special, platelet-shaped metal phosphate particles to increase the corrosion protection in steel structures. These are said to improve passivation and to increase the diffusion barrier for corrosive substances
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The Aqua Metallschutz combines a high level of protection with significantly simplified processing, because the water-dilutable 3-in-1 product is
Insulated metal surfaces are subject to different corrosion conditions than freely weathered ones. Because according to DIN 4140 (insulation work on operational systems
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