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

-----

Blackish surface on Aluminum T6061 after machining

2005

Dear Mr/Mrs/Ms,

I am facing problem in our Aluminum T 6061 part after machining.

There are blackish surface on some area of the machined part and under SEM-EDX, the blackish surface shown element of Magnesium.

Our normal part after machining only show element of Aluminum under SEM-EDX and no blackish was found.

What cause this and how to eliminate this problem ?

Pls help.

Many Thanks

Arwen
Machining company - Malaysia

Change your cutting fluid to one designed for aluminum and the black will very probably go away.

James Watts
- Navarre, Florida
2005

I suggest you look at the pH of your cutting fluids first.

AF Kenton
retired business owner - Hatboro, Pennsylvania
2005

(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: