By nanoSaar AG
Pre dispersed zinc phosphate dispersion for corrosion protection formulation development Zinc Phosphate is a liquid, pre dispersed zinc phosphate product with a reported dispersed particle range of 200 to 400 nm. The grade is offered for industrial formulation screening where a fine corrosion inhibiting pigment is required, in corrosion protective primers on steel and in surface conditioning before zinc phosphate conversion coating. Starting levels are formulation reference points and do not constitute a performance specification. Determine the optimum dosage by an application related concentration ladder while keeping total pigment volume concentration and total solids comparable. Improved corrosion protection, reduced dosage, thin film suitability and surface conditioning performance must be demonstrated in the target system. Samples and technical consultation are available on request. Key Features and Applications Pre Dispersed Supply Form: Liquid dispersion for direct incorporation under controlled agitation, which may reduce grinding demand in the formulation Fine Dispersed Particle Range: Reported range of 200 to 400 nm as the current product specific size information Active Inhibitive Pigment: Zinc phosphate for interfaces exposed to water and electrolyte, acting by precipitation and anodic passivation Defined Starting Levels: Documented screening window of 3 to 10 wt% active zinc phosphate in primers and 0.5 g/L in surface conditioning baths, with a stated conversion basis for as supplied dosage Corrosion Protective Primers on Steel: Evaluation in epoxy, acrylic, alkyd emulsion and water reducible alkyd systems, including thin film and direct to metal screening, where salt spray or cyclic corrosion performance, EIS, adhesion, blistering, water uptake, flash rust, pinholes, viscosity and storage stability are to be verified Surface Conditioning Before Conversion Coating: Evaluation on steel, zinc coated steel and aluminium, where dispersed particles provide nucleation sites for phosphate crystal formation and bath stability, crystal refinement, coverage, coating weight, adhesion and corrosion performance after the full process require qualification
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