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Al-Si Alloy parts go moldy

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.

Xudewen
KPSNC - Shanghai, PRC
2006

2006

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.

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