Corrosion-inhibiting pigmentation
Corrosion-inhibiting pigmentation uses special active agents in primers that release corrosion-inhibiting ions when wet and block anodic or cathodic processes on the metal surface. This slows undercutting of coatings.
Physico-Chemical Mechanism
Corrosion-inhibitive pigmentation contains special chemical compounds that activate on contact with moisture. They release corrosion-inhibiting ions that block anodic or cathodic processes on the metal surface, thus preventing corrosion.
Metallurgical Relevance & Risks in Welding
Using corrosion-inhibitive pigments in primers is especially important in humid environments or for steels with high corrosion protection requirements. Without these pigments, coating undercutting can accelerate, leading to cracks and loss of mechanical properties.
Workshop Practice & Action Points
Use primers with corrosion-inhibitive pigmentation in humid environments or for steels with high corrosion protection needs. Ensure the primer is fully dry and the pigments are activated before welding.