March 29, 2026

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Zinc Passivation Guide: Trivalent, Cobalt-Free & Chrome-Free Technologies

Introduction to Zinc Passivation Passivation on zinc and zinc alloys plays a critical role in enhancing corrosion resistance, improving surface durability, and ensuring long-term performance in industrial applications. With increasing global regulations and environmental concerns, the industry is rapidly shifting from hexavalent chromium (Cr⁶⁺) to safer and more sustainable alternatives such as Trivalent Chromium (Cr³⁺), […]

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September 3, 2025

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RoHS COMPLIANT CONVERSION COATING ON ALUMINIUM & ITS ALLOYS PRIOR TO POWDER COATING

ABSTRACT The extent of added corrosion protection and base for paint / powder coating adhesion derived from conversion coating of aluminium is primarily a function of chemistry of conversion coating bath, the coating weight/film thickness, post drying condition and time lag between conversion coating & powder coating. Our efforts to develop trivalent chromium & Cr-free […]

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