Case study of hard chrome plating application No. 3 [Plating on coating bars]

High-precision plating of thin films to maintain the groove shape of coating bars.

We received an inquiry from a film manufacturer who wanted to apply hard chrome plating to grooved bars as uniformly and accurately as possible. The primary requirement was the uniformity of the plating thickness. Variations in plating thickness directly lead to variations in the volume of the grooves, which in turn affects the amount of coating applied. After numerous prototypes, we successfully achieved hard chrome plating with a thin film of approximately 5 to 10 μm, maintaining a range of ±1 μm for 5 μm and ±2 μm for 10 μm. Regarding the type of grooves, we can accommodate both types: those made by rolling and those made by wrapping wire around a round bar. We were pleased to hear that we were able to maintain the wear resistance of hard chrome plating while preserving the groove shape, ensuring a stable coating amount and stabilizing quality.

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