Pickle & Oil
Metals that have been mechanically altered and worked or formed into a useful product (such as a screw, bolt or other fitting) are often coated with a discolored oxidized layer or scale. Before any surface finishing process is performed, this scale must be removed.
To do so, the part is treated with an acidic solution that cleans the metal by removing inorganic contaminants that can not be removed by other solutions.
This process is commonly called acid pickling.
After pickling, the part is treated with an oil solution that improves the corrosion resistance of the part.
Once the combined “Pickle & Oil” processes have been applied, the part is then ready to be zinc plated or zinc-nickel plated in a barrel.
Have Questions About Pre-Treatments for your Metal Part?
The experts at Wolverine Plating Corporation can help. Please contact us to discuss your pre-treatment needs and options.