HOME FAQs BOOKS JOBS: Help Wanted Suggestions you are here: Hotline/Forum => Letter 29075

Etching in anodizing

++++

Is etching necessary for anodizing castings. The castings are chemically washed before it goes for anodizing. Need this for deciding my process sequence for my new plant

Thickness: 20 microns
Hardness : 340 Vickers

S.Jabasingh Immanuel
Anodizing shop - Chennai, Tamilnadu, India

++++

Gm,

Etching in Chromic / Sulphuric is required prior to Anodising to remove and even out surface imperfections eventhough alkaline degreasing to some extent etches the surface of Aluminium. Also, a Dip in chromic/sulphuric bath will help in removing the smut formed on the surface during Alkaline Degreasing.

Shankaranarayanan N
- Bangalore, Karnataka, India

ANSWER or FOLLOW UP POST an unrelated QUESTION HOT Topics

Disclaimer: It is 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; some names may be fictitious and some recommendations may be deliberately harmful.

If you are seeking a product or service related to metal finishing, please check these Directories: