Q. What is black-zinc plating? G.H.
A. I answered a similar question regarding black zinc plating way back in the “dark ages” of this column. Here in an edited version is what wrote at that time:
“I am not aware of any black-zinc-plating process. What you are probably looking for is a zinc deposit followed by a black chemical conversion coating. You can find some good basic information on the chemical conversion process by searching pfonline.com. You did not specify why you need a black-zinc coating, so I should point out to you that other types of black coatings are available. Black-nickel and chromium-plating processes are available. In addition, black finishes can be applied on ferrous materials using black-oxide formulations at elevated temperatures. There are newer blackening processes that can be used at room temperature.” Another site containing information is Finishing.com.
Related Content
-
Zinc Electroplating
Choosing the best process for your operation.
-
Trivalent Chrome Overview
As the finishing industry begins to move away from the use of hexavalent chromium to trivalent chromium, what factors should finishers consider as they make new investments? Mark Schario, chief technology officer for Columbia Chemical offers a helpful overview of this complicated topic.
-
Liquid Chrome Vs. Chromic Acid Flake
Contemplating how to continue offering chromic acid services in an increasingly stringent regulatory world? Liquid chrome products may be the solution you’re looking for.
