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Suggested way to color the two ends of a cylinder different colors

October 26, 2011

I work for a company in the welding accessory field. We have cylindrical shaped parts made of heat treated carbon steel. The raw material is sintered C 11. We are looking at methods of coloring the two ends of the cylinder. The problem is that each end should be a different color. E coating looks attractive, but I fear that the electrically charged processes make it difficult to select only one surface to treat. Is E coating a possible finish for us? Is it possible to dip the parts only half way in the bath? Are there other finishes which may be more suited?

Darrell Gray
Product Engineer - Zurich, Switzerland

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