-- The Home Page of the Finishing Industry
A website for Serious Education, promoting Aloha,
& the most FUN smiley you can have in metal finishing

on this site
topic 8068

Media Blast or Chemical Pretreatment Better for Powder Coating?


I am looking to start up a small powder coating job shop. My question pertains to systems I have had quoted. Which pretreatment system has the broadest appeal and why? One system has a media blast system and the other has a chemical pretreatment system.

Tom Drake
- Charlotte, North Carolina


The answer to your question depends on a number of factors. However the main thing you will have to take into consideration is what kind of substrate you will be coating. If you are starting up a job shop and do not know this I would recommend the chemical pretreatment. A media blast system may be too aggressive for certain substrates and some systems can ingrain foreign objects (grease, oil) into the substrate rather than clean it. However there are a number of chemical pretreatments and you will have to look into the type of chemical treatment more carefully.

I'm sorry I could not give you a definite answer but I would require more information on your circumstances.

Drew Devlin
- North Lincolnshire

Preparation of Metals for Painting

Phosphating of Metals
by Rausch


I feel the pretreatment chemical wash is the best way to go. If you will be doing a lot of different parts the media blast could hurt certain surfaces.

Good Luck! Sincerely,

Cliff Shephard
- Charlotte, North Carolina

May 18, 2010

Hi, Tom. Drew is right that we need to know what material you want to powder coat, but I think Cliff is right that chemical pretreatment is better because almost any metal you powder coat will require either a phosphate or a chromate conversion coating pretreatment for proper corrosion resistance. Good luck.


Ted Mooney,
Teds signature
Ted Mooney, P.E. RET
Pine Beach, New Jersey

This public forum has 60,000 threads. If you have a question in mind which seems off topic to this thread, you might prefer to Search the Site


Disclaimer: It's not possible to diagnose a finishing problem or the hazards of an operation via these pages. All information presented is for general reference and does not represent a professional opinion nor the policy of an author's employer. The internet is largely anonymous & unvetted; some names may be fictitious and some recommendations may be deliberately harmful.

  If you need a product/service, please check these Directories:

JobshopsCapital Equip. & Install'nChemicals & Consumables Consult'g, Train'g, SoftwareEnvironmental ComplianceTesting Svcs. & Devices

©1995-2017     -    Privacy Policy
How Google uses data when you visit this site.