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topic 18429

Aluminium wetting against iron


2002

My problem is somewhat different but perhaps someone can help. I want to improve the wetting of liquid aluminium against cast iron. Does anyone know a coating that could be applied to the iron to improve the wetting?

Kevin Still
- Coahuila, Mexico


2002

Brush on silica gel or magnesium hydroxide from an aqueous suspension. Sodium silicate solution will probably work as well and may adhere better. The liquid aluminum wets the silica (or magnesia), creating a tiny thermite reaction. A coating of magnesium or zinc would also work.

Ken Vlach
- Goleta, California
contributor of the year

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 continues to benefit from.



2006

Aluminum wetting against iron . I read the answer (by Mr. Ken Vlach) concerning the use of magnesium hydroxide in aqueous suspension to improve the wetting of liquid aluminum against cast iron.
I'd like to know more about this suggestion. For example which is the best concentration on MgOH in water and all is useful to apply this tip.

Clerici Davide
Production of aluminum objects - Cuneo, Italy



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