No registration or passwords; no pop-up ads -- just aloha, fun, & answers.
(as an eBay Partner & Amazon Affiliate earns from qualifying purchases).
Home /
T.O.C.
Fun
FAQs
Good
Books
Ref.
Libr.
Advertise
 
Help
Wanted
Current
Q&A's
Site 🔍
Search
pub  Where the
world gathers for metal finishing
Q&As since 1989



-----

Iron Phosphate over Cast Iron?




I am interested in knowing whether TT-C-490 [affil link or DLA] , Method Type II (iron phosphate) can be applied over cast ductile iron without any problems. I know that it can be applied over forged steel, but was wondering about the cast iron. The chemistry of the cast iron conforms to ASTM A536 [affil link] , Grade 60-40-18. Also, are there any manufacturers that have baths suitable for treating a pipe that is approximately 5-ft long? Thanks, Marc

Marc Pepi
US Army Research Lab - Aberdeen Proving Ground, Maryland, USA
2001



Iron Phosphate coatings will form on cast-iron with no problem, getting a good coating without flash rust is a little more of a trick. Many shops can process a five foot piece of pipe, some can even do it in large quantities on a conveyorized line. Assuming your part is to be coated after phosphating, you will most likely need a good rust inhibiting final rinse, and a fast dry cycle to get the water off before it can pull out too much iron.

Jeff Watson
Jeff Watson
- Pearland, Texas
2001




Q. I am having trouble with phosphating of cast iron; please suggest the compositions of chemicals and the process for optimal results.

Kiran Kumar
- Delhi, India
March 2, 2012




(No "dead threads" here! If this page isn't currently on the Hotline your Q, A, or Comment will restore it)

Q, A, or Comment on THIS thread -or- Start a NEW Thread

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:

 
Jobshops
Capital
Equipment
Chemicals &
Consumables
Consult'g, Train'g
& Software


About/Contact  -  Privacy Policy  -  ©1995-2024 finishing.com, Pine Beach, New Jersey, USA  -  about "affil links"