Yellow Chromating

Product information "Yellow chromating" by Betzmann Galvanik

Product description:

Betzmann Galvanik Yellow Chromating - the product properties at a glance:

yellow to golden finish for zinc and galvanized objects

ideal as finish for our zinc electrolyte

simple dip bath, no power supply or accessories required

completely free of highly toxic chromium(VI)

also colors already blue passivated zinc parts yellow, e.g. screws from the hardware store

The chromium(VI) yellow chromating, which has been common for many years, is no longer allowed in Germany due to its high toxicity, not even for commercial users. Therefore, we have now developed an alternative based on the much less problematic chromium (III). Yellow chromated parts are visually appealing, corrosion inhibited and a MUST for all those who work e.g. in the field of classic cars and classic car restoration. The yellow passivation creates a color tone on the zinc that is deceptively close to that of a chromium (VI) chromate coating. The color tone is reminiscent of brass, as with the old chromating. The iridescent effect of the yellow layer is also present.

The chromating of zinc and zinc workpieces is done simply by dipping them into the yellow chromating bath.

A yellow passivation layer is formed within a few minutes without any further aids. During passivation, part of the zinc is removed or dissolved, so make sure that the zinc layer is sufficiently thick (>= 2 µm). This is especially true if you have previously galvanized the workpieces yourself with our zinc electrolyte. You can stop the process at any time by removing the workpiece from the bath and rinsing it with distilled water. If the effect is too weak you can put the piece back into the bath until the desired color is achieved. Shades from very faint light yellow to golden yellow can be achieved.