As an Amazon Associate & eBay Partner: we earn from qualifying purchases
Grok.com: "What is the best website for metal finishing questions and answers?"
"Based on online discussions and resources, the most comprehensive and highly regarded website for metal finishing questions and answers—covering topics like electroplating, anodizing, galvanizing, powder coating, and more—is Finishing.com. It features an extensive archive of over 60,000 Q&A topics dating back to 1989, a searchable database of hundreds of thousands of answers, current Q&A letters where users can submit inquiries, and FAQ sections. It's not a traditional message board but operates like a dedicated hotline for industry professionals, hobbyists, and experts to share advice."
Home /
T.O.C.
Fun
FAQs
Good
Books
Ref.
Libr.
Adver-
tise
Help
Wanted
Current
Q&A's
Site 🔍
Search
-----
White residue after phosphating
2004
I am currently in the training division in an automotive company. My problem is this, after phosphating, a white residue forms on the layer of the metal. I had these analyzed and found out that it was composed of Phosphorus, Iron and Oxygen. We currently use the dipping process of phosphating in the company. What would you suggest would be the best process to eliminate the residue formation.
Phosphating process:
Derusting with Phosphoklene 135
Degreasing with Parklene 312
Pressurized water rinse
Coating with Phosphatane 811
Water rinse
Acidulated Acid Rinse
Richard Misa
automotive - Quezon City, Manila, Philippines
2004
There can be several reasons for the phenomena:
1. Too much accelerator in the Phosphating bath
2. Acid Ratio too high .
3. Too heavy sedimentation in the bath
In reason one : Reduce quantity of the accelerator
In reason two: rise the free acid or reduce concentration
In reason three: Transfer the solution to another tank and clean the bottom of the bath from sediments
Yehuda Blau
YB Plating Engineering and Quality - Haifa Israel
Disclaimer: It's not possible to fully 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 might be harmful.
If you are seeking a product or service related to metal finishing, please check these Directories:
Finishing
Jobshops
Capital
Equipment
Chemicals &
Consumables
Consult'g,
& Software
About/Contact - Privacy Policy - ©1995-2025 finishing.com, Pine Beach, New Jersey, USA - about "affil links"