-- The Home Page of the Finishing Industry
We've struggled for over 23 years to build the
world's best website. It's worth your time smiley
    no popups, no spam
on this site
current topics
topic 60505

Black dots in brass castings

September 6, 2017

Q. I am running a metal accessories mural related company... We are using brass alu copper for casting process. In some brass metal we made we are having black dots within 1 week. Some are good with no black dots. We don't know what is the exact problem. Please help us.

vasanth k
admin - chennai,tamilnadu,&INDIA

September 2017

A. Hi Vasanth. It seems to me that the black dots are corrosion products of some sort, but it's hard to say what the difference is between the good and bad castings when we have no information about them. What is the supposed compsition? What is the casting temperature? Where and how are these castings stored for a week?


pic of Ted Mooney
Ted Mooney, P.E. RET
Pine Beach, New Jersey
Striving to live "Aloha"

This public forum has 60,000 threads. If you have a question in mind which seems off topic to this thread, you might prefer to Search the Site

ADD a Comment to THIS thread START a NEW threadView CURRENT TOPICS

Disclaimer: It's 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 & unvetted; some names may be fictitious and some recommendations may be deliberately harmful.

  If you need a product/service, please check these Directories:

JobshopsCapital Equip. & Install'nChemicals & Consumables Consult'g, Train'g, SoftwareEnvironmental ComplianceTesting Svcs. & Devices

©1995-2018, Inc., Pine Beach, NJ   -   About   -  Privacy Policy
How Google uses data when you visit this site.