Growchrome HB 322 Description Application: A yellow passivation process for Zinc and alloys. The Growel Advantage: It is designed specifically for producing a corrosion-resistant yellow-coloured passivation film and displays a very high tolerance for impurities in working baths such as zinc and iron, among others. Passivated Zinc plated components provide high corrosion resistance, even after heat treatment, thereby facilitating in-line hydrogen de-embrittlement in one go. get a quote