The Voice of the Finishing Industry since 1936

  • PF Youtube
  • PF Facebook
  • PF Twitter
  • PF LinkedIn

Chrome Pretreatment

Facebook Share Icon LinkedIn Share Icon Twitter Share Icon Share by EMail icon Print Icon

What are effective pretreatments before painting over chrome?

Q. I am the chrome specialist for a large automaker. Do you have any leads on effective pretreatments to chrome and for painting over the chrome? We do use several platers that use pretreatments to chrome before painting. But, in a general sense, do you have any experience with what does and does not work?—J.R.

A. Generally, you need to effectively clean your parts prior to any chrome plating. This may involve the use of an alkaline electrocleaner with a periodic reversed current. This would be followed by thorough rinsing and possibly the use of a dilute acid cleaner with rinsing to neutralize any residual alkaline cleaner. Some shops will first do a copper plating, while others will go directly to the nickel plating. Regardless, either process will require a nickel plating to provide a good base for the chromium as well as good corrosion resistance. I am not sure what processes need to be followed to paint over chrome plating. Generally, you would not spend the money on the chromium plating only to paint over that surface. 


  • Curing Oven Basics

    Simply heating up the substrate does not cure the coating. There are many variables to consider when choosing the best cure oven for your application...

  • Pretreatment for Painting

    Better adhesion, enhanced corrosion and blister resistance, and reduced coating-part interactions make pretreatment a must.

  • Phosphate Conversion Coatings

    Types of phosphate conversion coatings, how to apply them, and their specific functions.