Metal finishers helping each other -- No cost, No registration, No damn popups
(we earn from 'affiliate link' purchases, making the site possible)

Curated with aloha by
Ted Mooney, P.E. RET

finishing.com -- The Home Page of the Finishing Industry

  The authoritative public forum
  for Metal Finishing 1989-2025

-----

Al-Si Alloy parts go moldy

Q. Our company produces Al-Si alloy castings for automotive parts mainly in engine sections. We found a serious problem that our castings may be go moldy in a few months if they contact water. And it is hard to remove it. I want anyone could think a way to stop moldy. Can anyone make a good way to stop this? Very urgent, Anyone could solve this problem I will thank you all the way.

Prestone

on eBay or

Amazon

(affil links)

Xudewen
KPSNC - Shanghai, PRC
2006

A. To avoid internal corrosion, the water should contain corrosion inhibitors and pH buffers (acid neutralizers). Add an automotive coolant such as Prestone® ⇨

Anodizing will protect external surfaces of aluminum parts.

Ken Vlach [deceased]
- Goleta, California

Finishing.com honored Ken for his countless carefully researched responses. He passed away May 14, 2015.
Rest in peace, Ken. Thank you for your hard work which the finishing world, and we at finishing.com, continue to benefit from.

(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: