No cost, no registration, no passwords -- just aloha, fun & authoritative answers
(as an eBay Partner & Amazon Affiliate we earn from qualifying purchases)

Where the
world gathers for metal finishing
Q&As since 1989

-----

SS surface preparation problem

I intend to apply epoxy coat by brush to existing steel structure. Please suggest ways/means of surface preparation. I may go in for acid etching using ( HNO3 + H2So4).

Thanks & regards,

Sarvesh Kulkarni
- India

I am making the assumption that you have a stainless steel structure. (304 or 316). Since you mentioned acid treatments. The two acids that you mentioned may not do what you want.

(1) Degrease the surface ( Caustic Solutions or Organic Solvents)
(2) Etch away oxides ( Nitric Acid/ Ammonium Bifluoride)
(3) Rinse with water and dry.

Note: Look for paints that contain Zn or Sn as sacrificial element for corrosion purposes.

Diego Jaramillo
Alpha-Quantum-Omega - Anaheim, CA,USA

(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: