Metal Finishing Guide Book

2011-2012 Surface Finishing Guidebook

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Figure 10: FIB cross section of black passivated zinc–nickel with the final formulation of the trivalent chromium post-dip solution (Tridur Finish 300 10% v/v, pH 5.5, 45°C). Figure 13: SEM micrograph of black passivated Zn/Ni alloy (Tridur ZnNi H1) with post-dip applied (Tridur Finish 300, 10% v/v, pH 5.5, 45°C, drying temperature of 80°C). Figure 11: SEM micrograph of black passivated Zn/Ni alloy (Tridur ZnNi H1) without any further post- treatment. Figure 14: SEM micrograph of black passivated Zn/Ni alloy (Tridur ZnNi H1) with post-dip applied (Tridur Finish 300, 20% v/v, pH 5.5, 45°C, drying temperature of 80°C). Figure 12: SEM micrograph of black passivated Zn/Ni alloy (Tridur ZnNi H1) with post-dip applied (Tridur Finish 300, 5% v/v, pH 5.5, 45°C, drying temperature of 80°C). 294 Figure 15: SEM micrograph of black passivated Zn/Ni alloy (Tridur ZnNi H1) with post-dip applied (Tridur Finish 300, 30% v/v, pH 5.5, 45°C, drying temperature of 80°C).

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