Hobbyists & Industry luminaries alike learn on every visit
(we earn from 'affiliate link' purchases)

Curated with aloha by
Ted Mooney, P.E. RET

finishing.com -- The Home Page of the Finishing Industry

  The authoritative public forum
  for Metal Finishing 1989-2025

-----

Phosphate coating pre-wash

Does using a Hydrochloric Acid pre-wash before Phosphate coating present a greater risk of hydrogen embrittlement to steel hardened to Rockwell 38-43C than a sulfuric Acid pre-wash would.

Michael Ripley
- Co. Durham, England
2005

2005

FOR THE HEAVY IRON PHOSPHATE YOU HAVE TWO WAYS
THE FIRST PROCESS TO USE A PHOSPHODEGREASING FORMULATION (ONE PRODUCT USED FOR IRON PHOSPHATE THEN RINSE)

THE SECOND PROCESS TO USE AN ALKALINE DEGREASER HAS A GOOD ETCHING EFFECT FOR BAD SURFACE CONDITIONS ( dirt, natural oxide,....).
THEN RINSE
THEN PHOSPHODEGREASING , RINSE , DI RINSE

Ahmed Fouad Serag Eldin
Ein Shams - Cairo - Egypt

(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: