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

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

-----

Measuring the etching time in HF HNO3 prior to Anodising

Hi

I work for a titanium fastener manufacturer, we have an automated anodising line and would like to control the etching time to 5-20 secs after gassing has commenced as called for in ISO8080. The problem is that travel time from exiting the etching tank to complete immersion in the rinse tank takes 39 secs (that includes 15 secs draining). At what point is etching time measured, am I correct that it starts from exiting the etching tank to complete immersion in the rinse tank, or, is it from start to finish exiting the etch tank. I would be grateful for further tips on controlling the etching times on an automated line.

Many thanks

Mark Mat
Fastener Manufacturer - Midlands , UK
October 22, 2009

adv.
ti anodizing

(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: