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Citrasteel 2® Buffered Passivation Concentrate: Modern Passivation for Stainless-Steel Excellence
Citrasteel 2® Buffered Passivation Concentrate, from Alconox, LLC, represents the next generation in stainless-steel passivation—delivering ASTM A967–compliant performance with the safety, selectivity, and environmental responsibility that modern facilities demand.
Why Citric-Acid Passivation is the Smarter Choice
For decades, nitric-acid passivation was the industry standard. But technology has advanced—and citric-acid formulations now offer a superior, safer, and greener approach.
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Selective Iron Removal: Citric acid removes iron and iron oxides more precisely than nitric acid, creating a chromium-enriched surface and a stronger, more corrosion-resistant chromium-oxide layer.
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No Hazardous Shipping: Citrasteel 2 concentrate ships non-hazmat—unlike nitric acid—reducing regulatory and logistics costs.
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Environmentally Responsible: Nitric acid requires neutralization before disposal, while in many municipalities Citrasteel 2 can be safely discharged to drain (following local regulations). Shipped as a concentrate, used at 10%.
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Safer to Handle: Nitric acid can cause severe burns; Citrasteel 2 offers a much safer handling profile.
Proven Efficacy – ASTM A967 Compliance
Citrasteel 2 meets and exceeds ASTM A967 requirements for stainless-steel passivation. By selectively removing free iron while preserving chromium, it enables stainless steel to form a natural, self-healing oxide film even after machining or welding.
Oxygen in the air reacts with the chromium-rich surface to form a self-healing oxide layer that protects stainless steel from corrosion.
Non-Hazardous Shipping Classification
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Citric-acid formula—safe, effective, and sustainable
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Compliant with ASTM A967 for stainless-steel passivation
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Produces a higher chromium-to-iron ratio on treated surfaces
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Safer to handle, environmentally preferred, and cost-effective
Citrasteel 2® Passivation Concentrate —Science-Driven Passivation, Simplified
For samples or technical data, contact Jeff Phillips at JPhillips@Alconox.com or visit our Order Samples page.
