ZX-518 Chromium-Free Aluminum Passivator

This product is scientifically formulated from surfactants, chelating agents, polymeric organic acids, and passivation catalysts. It rapidly forms a fine, colorless film on the surface of aluminum and aluminum alloy workpieces, offering excellent corrosion resistance and suitability for various types of aluminum and aluminum alloy passivation treatments.Product Features: 1、Free from heavy metals such as chromium, non-toxic to humans2、Easy to operate, long service life, low cost 3. Strong adhesion, suitable for use as a pre-coating base layer4、Excellent bonding strength, enhances coating adhesion 5、Conductive film layer6、Uniform passivation film, strong anti-corrosion performance.Physicochemical Indicators：Appearance: Colorless transparent liquid PH Value:0.5~1  Process Parameters: 1、Recommended concentration:3%-10% 2、Operating temperature: Room temperature 3. Processing time: 4~6min4. Processing method: Immersion Operating Procedure: Degreasing - Rinse - Rinse - Pure water rinse - Chromium-free passivation -DryingPerformance Characteristics: 1、Treatment capacity: Approximately2-3 kg of concentrate consumed per ton of profile, 2、Long bath life, pure water preparation allows processing over 3000 tons of profiles without flocculation, 3、Film exhibits ultra-strong adhesion, no peeling after 2H high-pressure boiling water test, CASS salt spray resistance exceeds 500 hours, Bath Maintenance: 1、Use pure water for bath preparation2、White residue on aluminum surface after passivation is mainly due to low concentration, adjust chemical concentration and processing time immediately 3、Recommend using low hardness water or deionized water，if water hardness is too high, reduce it, otherwise the solution will become cloudy 4、Working solution PH should be controlled between 2.5~3.5, mix well and measure every two hours. When bath PH approaches 3.5, add original solution Precautions: 1、Before using this product, ensure aluminum surface oil stains are thoroughly cleaned2、After aluminum degreasing, thorough rinsing is necessary to avoid introducing acid into the passivation tank.、If splashed into eyes during cleaning operations, rinse immediately with water. 3、This product is not edible; store in a cool, dry, and well-ventilated place.